Avaya Canada NTL100AA TDMA - Dual Mode 800 MHz Enclosure User Manual 000 Frtmatt

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411-2051-500
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08 Draft 00.01 November 1999
DRAFT
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
Document number: 411-2051-500
Product release: MTX08
Document version: Draft 00.01
Date: November 1999
Copyright Country of printing Confidentiality Legal statements Trademarks
Copyright  1999 Nortel Networks Corporation, All Rights Reserved
Printed in Canada
NORTEL NETWORKS CONFIDENTIAL
The information contained herein is the property of Nortel Networks and is strictly confidential. Except as expressly authorized in
writing by Nortel Networks, the holder shall keep all information contained herein confidential, shall disclose it only to its employees
with a need to know, and shall protect it, in whole or in part, from disclosure and dissemination to third parties with the same degree
of care it uses to protect its own confidential information, but with no less than reasonable care. Except as expressly authorized in
writing by Nortel Networks, the holder is granted no rights to use the information contained herein.
Information is subject to change without notice. Nortel Networks reserves the right to make changes in design or components as
progress in engineering and manufacturing may warrant.
This equipment generates, uses and can radiate radio frequency energy. If not installed and used in accordance with the instruction
manual, this equipment may cause harmful interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference, in which case the user will be required to correct the interference at their own expense.
DMS, DMS-MTX, DualMode, MAP and NORTEL are trademarks of Nortel Networks.
Trademarks are acknowledged with an asterisk (*) at their first appearance in the document.
Nortel Networks Confidential
Publication history
October 1999
Draft 00.01. Draft issue of document for internal review.
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Publication history
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Contents
About this document
xiii
Audience for this document xiii
Organization of this document xiv
Related documents xiv
Equipment operation
Alarm Control Unit 1-1
Selecting an option 1-3
Input option 1-4
Output option 1-6
General option 1-8
DualMode Cell Site Monitor (DCSM) 1-9
Stand-alone mode operation 1-10
The Hughes M6200 handset (NT3P75AB) 1-10
Programming the mobile 1-12
Operating the mobile 1-21
Transmit Receive Unit (TRU) 1-22
The front panel display interface 1-22
The Terminal Interface 1-26
Fullscreen commands 1-31
Command line mode commands 1-36
Multi-Channel Power Amplifier (MCPA) 1-43
Installing the MCPA software program 1-43
Running the MCPA software on the computer 1-43
Downloading the MCPA firmware to the MCPA shelf (if required)
Setting the MCPA output power 1-47
1-1
1-46
Periodic maintenance
Periodic maintenance records 2-1
Equipment in a DualMode 800 Enclosure 2-2
Transmit Receive Unit (TRU) and Multi-Channel Power Amplifier (MCPA)
High Stability Master Oscillator (HSMO) 2-3
Alarm Control Unit (ACU) 2-3
Transmit path insertion loss 2-3
Other equipment 2-3
Transmission facilities 2-3
Microwave 2-4
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Copper audio link 2-4
Power 2-4
Battery 2-4
Rectifiers 2-4
Fuses/breakers 2-4
Cabling and connections 2-4
Inside grounding 2-4
Bay bonding 2-5
Cabling and connections 2-5
Principle ground bar 2-5
Transmission line entrance 2-5
Outside grounding 2-5
Tower and associated structures 2-5
Building sheath, fences and other equipment 2-6
Antennas and tower 2-6
Structure 2-6
Tower lighting 2-6
Grounding 2-6
Paint 2-6
Feed 2-7
Antennas 2-7
Pressurized transmission lines 2-7
Site performance 2-7
Fringe coverage 2-7
Handoff checks 2-7
Antenna sweep 2-7
Housekeeping 2-8
Heating/air conditioning 2-8
Dust control 2-8
Statutory requirements 2-8
Site licenses 2-8
Trash and loose articles 2-8
Site grounds keeping 2-8
Building service 2-8
Security 2-8
Manuals and records 2-9
Schedule for periodic cell site maintenance 2-9
DualMode 800 Enclosure Maintenance Reference Chart 2-10
DualMode 800 Enclosure Every Visit Checklist 2-13
DualMode 800 Enclosure MONTHLY Checklist 2-14
DualMode 800 Enclosure QUARTERLY Checklist 2-15
DualMode 800 Enclosure SEMI-ANNUAL Checklist 2-16
DualMode 800 Enclosure ANNUAL Checklist 2-17
Test equipment and precautions
Test equipment 3-1
Precautions 3-3
Equipment warm-up 3-3
Test equipment 3-3
RF radiation hazard 3-4
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Contents
Electrostatic Discharge (ESD) control
3-4
Power-up procedure
Overview 4-1
DC power inspection
Voltage checks 4-2
ix
4-1
4-1
Master Oscillator tests
5-1
Overview 5-1
Oscillator frequency specifications 5-1
Oscillator power level test 5-2
Reference oscillator tests 5-2
Oscillator frequency test procedure using TRUs 5-4
HSMO frequency test — transceiver carrier method
5-4
Antenna and transmission line tests
Antenna direct current continuity 6-1
Antenna return loss 6-2
Antenna return loss test 6-2
Thruline wattmeter method (Antenna return loss)
Antenna sweep 6-4
6-1
6-4
Enhanced Receive Multicoupler (ERMC) tests
7-1
ERMC description 7-1
ERMC overall gain measurement test 7-1
ERMC gain adjustment 7-4
Talk-In/Talk-out (TITO) balance test 7-4
TITO test procedure 7-5
Alarm Control Unit (ACU) tests
Overview 8-1
Alarm Control Unit test setup
8-1
8-1
Performing tests using a DCSM
Introduction 9-1
Stand-alone mode tests 9-1
Stand-alone ACCH/DCCH selection 9-1
DCSM auto answer facilities 9-2
Performing tests using the DCSM in the directed mode
Monitoring functions 9-2
Posting the DCSM 9-4
Control Channel tests 9-4
MTX CTT tests 9-9
9-1
9-2
ICRM tests
10-1
DRU tests
11-1
Introduction 11-1
Functionality of the DRU
11-3
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Audio sensitivity of the TRU 11-3
Test considerations 11-4
Test equipment required 11-5
TRU self test 11-5
DRU configurations for analog tests 11-6
Nominal Application Gain 11-6
TRU setup 11-7
DRU transmit tests 11-12
Service impacts 11-12
Transmit test setup procedure 11-12
Transmit Carrier Frequency test 11-15
Wideband Modulation test 11-15
SAT Frequency and Deviation tests 11-16
Residual Modulation test 11-17
Transmit Audio Level test 11-17
Modulation Limiting test 11-18
1 kHz Tone Generation test 11-20
Setting TX audio deviation to site operational level 11-21
DRU receive tests 11-22
Service impacts 11-22
Receive test setup procedure 11-22
Receive sensitivity test 11-25
Receive and transmit audio line sensitivity test 11-25
Receive audio level test 11-26
RSSI test 11-27
RSSI offset calibration 11-29
SAT detect test 11-35
ST detect test 11-36
Setting RX audio level to site operational level 11-37
Transmit RF output power test 11-38
Transmit RF output power test setup procedure 11-38
Requirements on the Transmit RF output power test 11-40
Transmit RF output power test 11-41
Setting TRU power step size and Max power to site operational level 11-42
DRU digital tests 11-43
Digital test considerations 11-43
Bit error rate test at the MTX switch 11-44
Bit error rate test at the cell site 11-46
TDMA modulation accuracy test 11-49
TDMA call test 11-52
Enclosure maintenance
Field Replaceable Unit (FRU) 12-1
General precautions 12-4
RF radiation hazard 12-4
Electrostatic Discharge (ESD) control 12-4
Cable/connector identification 12-4
Replacing faulty common equipment (CE) units 12-5
Replacing faulty radio frequency (RF) units 12-6
Replacing the TRU or MCPA shelf 12-7
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General rules for replacing a TRU or an MCPA module 12-7
Replacing the TRU 12-7
Replacing the MCPA module 12-8
Returning a faulty unit to your Nortel Networks CSO office 12-9
Appendix A: Frequency table
A-1
System's channel and frequency 1
Channel frequency calculation (in the following, N = channel number) A-1
AMPS frequency allocation A-1
Appendix B: Test forms
B-1
Power and grounding checks (Chapter 4) B-2
HSMO checks (Chapter 5) B-3
Antenna checks (Chapter 6) B-3
DRU checks — Transmit tests (Chapter 11) B-4
DRU checks — Receive tests (Chapter 11) B-5
DRU checks — Digital tests (Chapter 11) B-6
Figures
Figure 2-1
Figure 2-2
Figure 2-3
Figure 2-4
Figure 2-5
Figure 2-6
Figure 2-7
Figure 2-8
Figure 2-9
Figure 2-10
Figure 2-11
Figure 3-1
Figure 6-1
Figure 6-2
Figure 7-1
Figure 8-1
Figure 8-2
Figure 9-1
Figure 9-2
Figure 10-1
Figure 10-2
Figure 10-3
Figure 10-4
Figure 10-5
Figure 10-6
Figure 10-7
Figure 10-8
Figure 10-9
Figure 10-10
Figure 11-1
Figure 11-2
ACU Initial screen display 2-2
ACU menu structure 2-3
Typical Input Monitor screen display 2-5
Typical Output Monitor screen display 2-7
Controls and keypad on Hughes M6200 handset 2-10
Front panel layout of the TRU2 (NTAX98AA) 2-22
Front panel layout of the TRU3 2-23
Fullscreen display for the TRU2 2-29
Fullscreen display for the TRU3 2-30
Selection menu for the MCPA 2-44
Power setting menu for the MCPA 2-44
Equipment layout of a DualMode 800 Enclosure 3-2
Oscillator power level and frequency test setup 6-3
Oscillator frequency test setup — transceiver carrier method
Antenna return loss block diagram 7-3
RMC overall gain measurement test 8-3
Talk-In/Talk-out call setup 8-5
ACU First maintenance screen 9-2
Typical alarm connector (36-Pin) 9-3
MALT and MAHT CTTPARMS Fields 10-10
MALT Test Output MTX303 Log 10-11
MAHT Test Output MTX303 Log 10-11
MRLT and MRHT CTTPARMS fields 10-13
MRLT Test Output MTX303 Log 10-14
MRHT Test Output MTX303 Log 10-14
MRLP Test Measurements 10-15
MRLP Test results MTX302 Log 10-16
MRLR Test Measurements 10-18
MRLR Test results MTX302 Log 10-19
Front panel layout of the TRU2 (NTAX98AA) 11-2
Front panel layout of the TRU3 (NTAW99AA) 11-2
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Figure 11-3
Figure 11-4
Figure 11-5
Figure 11-6
Figure 11-7
Figure 11-8
MCPA front panel layout 11-3
DRU transmit tests setup (service affecting) 11-14
DRU receive tests setup (shelf/site service affecting) 11-24
RSSI offset setup 11-29
Transmit RF output power test setup 11-39
Transmit power level of a DualMode 800 Enclosure with 24-channel per
cell/sector using two MCPA modules 11-41
Figure 11-9 Digital loopback paths 11-43
Figure 11-10 BER test setup at the cell site 11-47
Tables
Table 1-1
Table 1-2
Table 1-3
Table 1-4
Table 1-5
Table 1-6
Table 2-1
Table 3-1
Table 4-1
Table 4-2
Table 4-3
Table 4-4
Table 9-1
Table 11-1
Table 11-2
Table 11-3
Table 11-4
Table 11-5
Table 12-1
Transitions in the TRU3 LED state 1-24
TRU Fullscreen command summary 1-31
TRU Fullscreen commands 1-32
Command line mode maintenance commands 1-36
Command line mode measurement commands 1-40
Command line mode test commands 1-42
Maintenance schedule example 2-9
DRU to Interface Terminal connection 3-2
Minimum bending radii of power cables 4-2
RIP1 circuit breaker assignments and ratings 4-3
RIP2 circuit breaker assignments and ratings 4-3
RIP3 circuit breaker assignments and ratings 4-3
Naming convention of the MTX trunk tests 5-9
DRU configurations for analog tests 11-8
RSSI characteristics 11-28
DRU configuration for RSSI characteristics 11-34
RSSI measurement characteristics 11-34
Nominal DualMode 800 Enclosure per-carrier power level at the output
port of the MCPA shelf 11-40
DualMode Urban field replaceable units 12-1
Procedures
Procedure 9-1 Posting the DCSM 9-4
Procedure 9-2 Control Channel test set-up 9-5
Procedure 9-3 Measuring forward CCH RF power 9-6
Procedure 9-4 Measuring reverse CCH RF power 9-6
Procedure 9-5 Round Robin Monitoring 9-7
Procedure 9-6 Querying ACCH OMT parameters 9-8
Procedure 9-7 Querying the DCSM parameters 9-8
Procedure 9-8 Initiating the MALT/MAHT test 9-11
Procedure 9-9 Initiating the MRLT/MRHT tests 9-13
Procedure 9-10 Initiating the MRLP test 9-16
Procedure 9-11 Initiating the MRLR test 9-18
Procedure 9-12Invoking the DTRM or MTRM tests 9-20
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About this document
This publication is one of a set of documents that provide Nortel Networks
customers with information and suggestions on the planning, operations and
maintenance of their TDMA 800 MHz Universal Enclosure system. This set
of documents includes the following manuals:
Manual title
Manual number
DualMode 800 Enclosure Functional Description
411-2051-100
DualMode 800 Enclosure Pre-Installation Guidelines
411-2051-200
DualMode 800 Enclosure RF Deployment Guide
411-2051-300
DualMode 800 Enclosure Installation Manual
—
DualMode 800 Enclosure Maintenance Manual
411-2051-500
DualMode 800 Enclosure Troubleshooting Guide
411-2051-900
Audience for this document
The intended audience for this set of manuals includes cell site technicians
and planning engineers who require detailed information on the planning,
operation and maintenance of a TDMA 800 MHz Universal Enclosure cell
site.
The Functional Description is a technical reference foundation for the other
documents in the documentation suite and is written for all.
The Pre-Installation Guidelines provides information on site selection,
concrete pad preparation and specifications and installation guidelines.
The RF Deployment Guide is written for system planning personnel planning
to implement new cells or expand existing cell sites.
The Maintenance Manual and the Troubleshooting Guidelines provide
information on problem recognition and preventive maintenance are written
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for the cell site technician to assist in troubleshooting and performing routine
work.
The document suite assumes that the reader has a basic knowledge of cellular
systems and radio propagation and is familiar with measurement units and
terms associated with these concepts. This document does not provide
detailed information on the theory of switching and radio propagation.
Organization of this document
This publication is organized to present the following information:
• overview of the TDMA 800 MHz Universal Enclosure, highlighting the
components
•
layout of the equipment bays, interface module and battery pedestal
•
detailed descriptions of the TDMA 800 MHz equipment, both standard
components and thoses specific to the enclosure. RF paths, channel
expansion, and field-replaceable units are also included.
•
discussion of the environmental control systems (heating/cooling)
•
the power systems of the enclosure, as well as grounding requirements
•
technical specifications of the enclosure
•
list of terms (acronyms and abbreviations)
Related documents
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1-1
Equipment operation
In a DualMode 800 Enclosure, you can communicate with the Alarm Control
Unit (ACU), the Transmit Receive Unit (TRU) and the Multi-Channel Power
Amplifier (MCPA) by the use of an interface terminal or a computer. You can
use the handset on the DualMode Cell Site Monitor (DCSM) to program the
mobile unit and perform call through test.
This chapter describes the interface commands for configuring and
programming these units in the DualMode 800 Enclosure.
Alarm Control Unit
The MAINTENANCE (Local Terminal) port located on the front of the ACU
gives direct access to the ACU MPU board. You can use this interface to
configure and monitor the alarm input points and the control output contacts.
To access the ACU for local maintenance and monitoring, you need a VT100
(or equivalent) terminal with the following settings:
Stop bit control
1 bit
Word length
8 bits
Parity
none
BAUD rate
9600
Interface
RS-232C
If you cannot set the terminal to the settings listed, change the ACU
configuration by setting the local terminal switch (SW3) on the MPU board to
match your terminal settings. Refer to Table 5-4 for the settings of SW3 in the
DualMode 800 Enclosure Functional Description, 411-2051-100.
When the terminal and ACU are set correctly, connect the terminal to the
MAINTENANCE port with a null modem cable. Power up the terminal, hold
the CONTROL key and press the Z key. A menu of options will appear on the
screen as shown in Figure 1-1.
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Figure 1-1
ACU Initial screen display
You can choose one of the four primary options at the first level:
• Input
•
Output
•
General
•
Analog Ins (not used)
Each option consists of up to three lines on the screen. Figure 1-2 shows the
structure of these options.
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Alarm Control Unit
1-3
Figure 1-2
ACU menu structure
Selecting an option
This document describes the procedure for selecting and setting the
parameters for ‘Enable Single’ in the Input option. You can use the same
procedure as an example to select the other options.
Note: The left and right arrow keys move the cursor to options on the
same line. The up arrow key moves the cursor back to the previous line
and the down arrow key moves the cursor to the next line.
1. On the first line, press the right arrow key to move the cursor to the Input
option. The options on the second line will change accordingly as the
cursor moves.
2. Press the down arrow key to move the cursor to the second line. The
cursor will highlight the first option on the second line.
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3. On the second line, press the right arrow key to move the cursor to the
Enable Single option. The options on the third line will change
accordingly as the cursor moves.
4. Press the down arrow key to move the cursor to the third line. The cursor
will highlight the first option on the third line.
5. On the third line, type in the number of the alarm input point that needs to
be enabled. Press the Return key.
Note: For options that have more than one parameter on the third line, use
the left and right arrow keys to move the cursor from one parameter to
another parameter.
6. Press the Return key a second time to execute the selected parameter of
the option. The display will show:
Command Sent...Acknowledge Received
7. Press the up arrow key to move the cursor back to the previous line.
Note: The ‘Monitor’, ‘Show Function Codes’ and ‘Firmware Info’
options do not have a third line on the menu. When selecting these
options, press the Return key after they are selected. The information for
these options will appear on the display.
Input option
You can select the following five functions under the Input option:
• Monitor
•
Enable Single
•
Disable Single
•
Enable Range
•
Disable Range
Monitor
This function monitors the status of each alarm input point. Figure 1-3 shows
a typical screen display of the Input Monitor option.
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Alarm Control Unit
1-5
Figure 1-3
Typical Input Monitor screen display
•
Alarm point 241—ROM check
•
Alarm point 242—RAM check
•
Alarm point 243—Non-volatile RAM check
•
Alarm points 244 to 248—Reserved
For the assignment of the external input alarm points, refer to Table 3-7 in the
DualMode 800 Enclosure Functional Description, 411-2051-100.
The status of each point is displayed as follows (see Figure 1-3 for the screen
display):
• Disable/Inactive
The alarm input point has been disabled either
from the MTX or the terminal and is currently not
detecting an alarm.
•
Enable/Inactive
The alarm input point has been enabled and is
currently not detecting an alarm.
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•
Disable/Active
The alarm input point has been disabled. It is
currently detecting an alarm which, because it is
disabled, will not be reported to the MTX.
•
Enable/Active
The alarm input point has been enabled. It is
currently detecting an alarm that has been reported
to the MTX.
You can monitor the status of the alarms continuously because the terminal
automatically updates the display every second while in the Monitor mode.
After you leave the Monitor function, the data will still be displayed until you
press the RETURN key.
Enable Single
The Enable Single function enables input alarm points one at a time. You
must enable an input alarm point before it will report alarm conditions to the
MTX.
Disable Single
The Disable Single function disables input alarm points one at a time. A
disabled input alarm point will not report alarm conditions to the MTX.
Enable Range
The Enable Range function enables a group of input alarm point at a time.
Disable Range
The Disable Range function disables a group of input alarm point at a time.
Output option
You can select the following five functions under the Output option:
• Monitor
•
Open Single
•
Close Single
•
Open Range
•
Close Range
Monitor
This function monitors the status of each output contact point. Figure 1-4
shows a typical screen display of the Output Monitor option.
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Alarm Control Unit
1-7
Figure 1-4
Typical Output Monitor screen display
Note: An Urban cell site does not have specific assignment for output
contact points.
HH:MM is the ACU clock display. The display updates the time once every
minute.
The status of each point is displayed as follows (see Figure 1-4 for the screen
display):
• Open
The output contact is open.
•
Closed
The output contact is closed.
You can monitor the status of the output contacts continuously because the
terminal updates the display with an opened or closed output contact.
After you leave the Monitor function, the data will still be displayed until you
press the RETURN key.
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Open Single
The Open Single function opens output contact points one at a time. Setting
an output contact point to Open disables that output point.
Close Single
The Close Single function closes output contact points one at a time. Setting
an output contact point to Closed enables that contact point.
Open Range
The Open Range function opens a group of output contact points at a time.
Close Range
The Close Range function closes a group of output contact points at a time.
General option
You can select the following four functions under the General option.
• Set Clock
•
Restart
•
Show Function Codes
•
Firmware Info
Set Clock
The ACU clock determines the time alarms are generated. This option allows
you to set the time on a 24-hour basis.
Restart
This function restores the alarm input points and output contacts of the ACU
to the default states.
Show Function Codes
This function displays the function codes the system uses on messages
between the MTX and the ACU.
Firmware Info
You can display information about the existing firmware load in the ACU.
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DualMode Cell Site Monitor (DCSM)
1-9
DualMode Cell Site Monitor (DCSM)
The DualMode Cell Site Monitor (DCSM) can operate in two modes, standalone and directed. In stand-alone mode, the DCSM functions like a normal
mobile telephone. In directed mode, the DCSM performs test functions under
the control of the MTX.
When you power up or reset a DCSM, the DCSM performs a self-test.
Note: During power up, it may take as long as four minutes for the
DCSM to startup.
The display on the handset first shows the phone number of the mobile unit.
On a successful self-test, the display shows the SELFTST PASS message.
The DCSM is in stand-alone mode after the self-test. The display shows that
the mobile unit is on and is ready for originating and answering calls.
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Stand-alone mode operation
In stand-alone mode you can use the handset on the front panel of the DCSM
to originate and answer calls.
The mobile unit functions in the same way as a subscriber mobile telephone
in the cellular system. For this reason, the mobile unit in the DCSM has to be
activated in the same way as a subscriber mobile telephone. The cellular
system will not recognize the mobile unit or allow it to function unless the
programming on the Numerical Assignment Modules (NAM) is completed.
The Hughes M6200 handset (NT3P75AB)
The Hughes M6200 cellular telephone is used as the mobile unit in the
DCSM. Figure 1-5 shows the location of controls and keypad on the Hughes
M6200 handset.
Figure 1-5
Controls and keypad on Hughes M6200 handset
M6200 Handset
Display
on
InUse
Send Key
Up/Down Volume
Control Button
Recall Key
SND
Draft
00.01
NoSvc
PWR
Digital
END
QZ
ABC
DEF
GHI
JKL
MNO 6
PRS
TUV
WXY
Power Key
End Key
Digit Keys
RCL
CLR
STO
Store Key
M1
FCN
M2
Clear Key
One-Touch
Dial Keys
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DualMode Cell Site Monitor (DCSM)
1-11
Controls and keypad description
Display
Provides the following information:
Signal Strength—bars on the upper left of the
display indicate the signal strength of your phone
when it is on. Three full bars signifies highest
strength.
InUse—indicates a call is in progress.
Roam—when on or flashing, indicates that the
phone is outside the home service area as
determined by Sys ID.
NoSvc—indicates that the signal strength is not
strong enough to allow a call to be initiated or
received.
Digital— indicates that the current call is in digital
mode.
Up/Down Volume
Control keys
Adjusts the keypad, speaker and earpiece sound
level. This key is also used to scroll through the
parameters of the NAMs and other menus.
0-9 Digit keys
Used for entering telephone numbers.
SND (Send) key
Originate/answer calls.
PWR (Power) key
The function of this key has been disabled. The
mobile/DCSM cannot be turned off by this key.
END key
Ends calls.
RCL (Recall) key
Recalls numbers stored in memory.
CLR (Clear) key
Clears the display or allows you to exit from any
menu.
STO (Store) key
Stores information in memory and confirms your
selections.
One-Touch Dial keys
(M1 and M2)
Numbers stored in either of these keys can be
dialed by simply pressing the appropriate key.
FCN (Function) key
When used with other keys, personalizes your
phone.
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Programming the mobile
To activate the Hughes M6200 mobile, you need to program:
• the four Numerical Assignment Modules (NAMs)
•
Due to NAM4's scanning control of paging channels, it must be
programmed when the M6200 mobile is used in the DCSM.
•
System selection
CAUTION
Failure to program the DCSM mobile unit as described, or
attempting to program the DCSM mobile unit as a regular
M6200 mobile will result in the malfunction of the DCSM.
Programming the NAM parameters
For the M6200 cellular telephone, the NAMs are stored in the mobile and
need to be programmed when the DCSM is installed in the cell site.
The NAM parameters that can be programmed are:
• Area Code
•
Phone Number
•
Access Overload Class (ACCOLC)
•
Primary 1st Paging Channel (1STCHP1)
•
Secondary 1st Paging Channel (1STCHP2)
•
System ID (SID)
•
Extended System ID (Ex SID1-8)
•
Unlock
•
Security Code (Secure)
•
Digital Indicator (Dig Ind)
•
Sticky Analog (StickyA)
•
BillBoard1 (NAMs 1 to 3 only)
•
BillBoard2 (NAMs 1 to 3 only)
Note: NAM 4 includes five additional programming fields:
— Scn DCCH
— # DCSS
— 1STCHA1
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1-13
— 1STCHA2
— 1STCHB1
— 1STCHB2
— #DCCHS
— 1STDCCH
Press the FCN key and then the 0 (zero) key to select a NAM. The display
shows the letters “NAM” and the phone number for NAM1. The “Volume”
arrow keys on the side of the handset can be used to select the other three
NAMs.
To read the ESN (Electronic Serial Number) and to access the contents of
NAM1, enter a six digit security code. The factory default security code is
000000.
When the correct security code is entered, the display shows the (ESN) of the
mobile telephone. Record the ESN number as it is required for datafilling the
CSMINV table.
Note: The numbers shown in the following screen displays are examples
only.
At this point, you have accessed NAM1 and may press the “Volume” arrow
keys to scroll through all of the NAM parameters. Use the CLR key and the
number keys to set the parameters of the NAM that you have selected. After
changing one parameter, you may edit another one by pressing an arrow key
to scroll to the parameter. Press the STO key when you are done with the
selected NAM.
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Use the arrow key to scroll to the Area Code display. Enter your three digit
area code.
Use the arrow key to scroll to the Phone Number display. Enter your seven
digit phone number.
Use the arrow key to scroll to the Access Overload Class (ACCOLC) display.
Enter the ACCOLC. The default setting is 10 for the DCSM.
For NAM4 only:
Use the arrow key to scroll to the field ScnDCCH
• Set ScnDCCH to 1 if you want the mobile to scan using the IS-136.1
scanning algorithm (that is, scan for DCCHs) or
•
Set ScnDCCH to 0 if you want the mobile to scan using the IS-136.2
scanning algorithm (that is, scan ACCHs only)
ScnDCCH
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DualMode Cell Site Monitor (DCSM)
1-15
Use the arrow key to scroll to the Primary First Paging Channel (1STCHP1)
display. Enter the Control Channel (CCH) number for your cellular band,
Channel 333 for A system or channel 334 for B system. The CCH must be a
standard CCH although NAM4 can be programmed to use a non-standard
CCH. A non-standard CCH is generally for bench-testing to prevent
interference with local cel1site CCHs. (333 for A, or 334 for B system)
Use the arrow key to scroll to the Secondary First Paging Channel
(1STCHP2) display. Enter the three digit second control channel number of
the cell site, if any. (708 for A, or 737 for B system)
Programming control channels to scan: NAM4 only
Use the arrow key to scroll to the #DCCS (number of dedicated control
channels) display. Enter the total number of control channels that the DCSM
is assigned to scan (1 to 21 channels).
For NAM4 only:
Use the arrow key to scroll to 1STCHA1 display. Enter the A side primary
control channel (IS-54B and IS-136.2 default 333).
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Repeat this step for: 1STCHA2 A side secondary control channel (708*)
1STCHB1 B side primary control channel (334 *)
1STCHB2 B side secondary control channel (737*)
* IS54B and IS-136.2 defaults
Note: These fields define the control channels the DCSM is to use.
For example: range of control channels = STCHAx + (#DCCS + 1)
and/or = 1STCHBx - (#DCCS - 1)
For NAM4 only:
Use the arrow key to scroll to the #DCCHS (number of Digital Control
Channels) display. Enter the total number of control channels that the DCSM
is assigned to scan (1 to 21 channels).
#DCCHS
21
For NAM4 only:
Use the arrow key to scroll to the 1st Digital Control Channel (1STDCCH)
display. Enter your 1st DCCH.
1STDCCH
767
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DualMode Cell Site Monitor (DCSM)
1-17
Use the arrow key to scroll to the System ID (SID) display. Enter your System
ID.
Use the arrow key to scroll to the Extended System ID 1 display (Ex SID1). If
the factory default does not read zero then enter zero in this field.
Repeat this step for the other Extended System IDs (Ex SID2-Ex SID8).
Use the arrow key to scroll to the Unlock Code display. Enter your four digit
Unlock Code. The factory default is 0000.
CAUTION
Whenever you enter a new Unlock Code or Security Code,
make sure that you have recorded the new code. There is no
way you can unlock the mobile or enter the NAM again
without entering the correct Unlock Code or Security Code.
Note: Nortel Networks recommends that unless under management
directive, the Unlock and Security codes not be changed from their
defaults.
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Use the arrow key to scroll to the Security Code (SecCode) display. Enter
your six digit Security Code. The factory default is 000000.
Use the arrow key to scroll to the Digital Indicator display (Dig Ind).
Note: In the DCSM applications, always enter a 1 to allow the mobile to
indicate if it is in Digital mode.
Use the arrow key to scroll to the Sticky Analog display (StickyA).
Note: In the DCSM application, always enter a 0 to keep the mobile in
analog mode and preventing it from entering the digital mode state.
For NAM1 only:
Use the arrow key to scroll to Billboard 1 (Billbd 1). Enter a zero in this field.
Repeat this step for the BillBd 2 field.
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DualMode Cell Site Monitor (DCSM)
1-19
Use the arrow key to scroll through the NAM and verify that all the values
have been entered correctly. Press STO key to store all the values into volatile
memory that you have entered.
Press the reset button on the rear panel of the DCSM to reset the unit. You can
also perform a BSY and RTS to reset the DCSM. You have programmed
NAM's non-volatile memory when the self-test is completed.
NAM 4 must be programmed as well if only one telephone number is
assigned to the DCSM. Nortel Networks recommends that you also load the
three remaining NAMs (NAMs 2,3 and 4) with the same information to
prevent from inadvertently selecting a vacant NAM.
Repeat the same programming procedure by using the FCN key and the 0
(zero) key to get the NAM display. Use the arrow key to select one of the
three remaining NAMs. Program each NAM.
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Programming the system selection
When all the NAMs have been programmed, enter the system selection for
the DCSM in your service area. Press the FCN key and then the 1 key. Use the
arrow key to scroll through the system selection options. When the system of
your service area appears (consistent with your Primary First Paging Channel,
1STCHP1, in NAM4), stop scrolling. Press the STO key to confirm your
selection and place it into memory.
Note: Making a system selection inconsistent with your 1STCHP1 could
prevent calls from being made and cause the “Roam” indicator on the
display to blink.
Configuration of the mobile cellular telephone is now complete and the phone
can now be used to originate and answer calls.
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DualMode Cell Site Monitor (DCSM)
1-21
Operating the mobile
When all the NAMs have been programmed and the system selection has
been selected, the Mobile Unit is ready for operation.
Receiving a call
When the phone rings, lift the handset from the hang up cradle and press the
SND key to answer the call.
Note: If the phone is locked, or you are accessing functions or storing/
recalling a number when the phone rings, you can still answer the call by
pressing the SND key.
Placing a call
Enter the telephone number you want to call and press the SND key.
Ending a call
Press the END key to end a call.
Note: Returning the handset to the hang up cradle without pressing the
END key will not end a call.
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Transmit Receive Unit (TRU)
The Transmit Receive Unit (TRU) provides two methods for accessing the
Operation, Administration, and Maintenance (OA&M) functionality, the front
panel display interface and the AMPS/TDMA Terminal Interface. The front
panel display provides operating parameters and status information; the
Terminal Interface acts as a user-friendly interface to TRU command, control,
and monitoring functions.
The operating parameters and status information on the front panel display
are also available through the terminal interface by using the QUERY FAULT
command in the command line mode. This contains all of the necessary
information for proper OA&M functions of the TRU.
The front panel display interface
The front panel display on the TRU provides operating parameter information
for the technician to properly administer the TRU.
TRU2 (NTAX98AA) front panel display interface
The front panel display interface for the TRU2 (NTAX98AA), as shown in
Figure 1-6, consists of an eight-character LED display of current status
information.
Figure 1-6
Front panel layout of the TRU2 (NTAX98AA)
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Transmit Receive Unit (TRU)
1-23
•
The first three characters on the display show the current personality of
the TRU:
Display
Personality
AVC
Analog Voice Channel
ACC
Analog Control Channel
ALR
Analog Locate Receiver
DCC
Digital Control Channel
MDS
Mobile Data Base Station
TTC
TDMA (digital) Traffic Channel
TLR
TDMA (digital) Locate Receiver
•
The next character on shows an asterisk (*) if the TRU is currently
transmitting. Otherwise, it is left blank.
•
The last four characters show the current channel number or, if the TRU is
not selected, ROMIDLE is displayed.
TRU3 (NTAW99AA) front panel display interface
The front panel display interface for the TRU3 (NTAW99AA), as shown in
Figure 1-7, consists of six LEDs. The top three LEDs show the operational
status of the TRU. The bottom three LEDs show the personality status of the
TRU.
Figure 1-7
Front panel layout of the TRU3
Status LEDs
RS-232 port for the
Terminal Interface
connector
Handle
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Table 1-1 shows the various transitions in LED state that may be observed
during operation.
Table 1-1
Transitions in the TRU3 LED state
State
Status
LED
ON
Description/Action
LOS FAIL CCH LCR
TX
Flash Flash Flash Flash Flash Flash LEDs flash on and off for approximately
Power-up
1 second, then radio goes to state 2.
(LED check)
Diagnostics Off
Last Last On
state state
On
Off
Radio is not in service. It performs a
series of hardware diagnostic tests that
run for approximately 12 seconds. If all
tests pass, radio goes to state 3;
otherwise, it goes to state 5.
ROM-idle
On
Last Last On
state state
On
Off
If the radio in this state is not put into
service in one minute, it resets itself
and returns to state 2. The radio
transitions between states 2 and 3 until
it is put into service (state 6), loading
begins (state 4), or a Hard Reset
command is received from the MTX
(state 2).
Loading
On
Off
Off
Flash Flash Off
The ON LED is on and the CCH and
LCR LEDs flash during the loading
period. When loading is complete, radio
returns to state 2.
Idle fault
Off
Off
On
Off
The radio is in this state when a
hardware diagnostic test fails before
the radio is put into service. When the
radio is in this state, perform the
following:
(a) Re-seat the radio into its slot again
(or to another slot) to identify if the fail
was caused by a power supply glitch or
some other transient event.
(b) If the fault is cleared, the FAIL LED
turns off, the ON, CCH and LCR LEDs
turn on and the radio proceeds to state
2.
(c) If the FAULT LED remains on,
replace the radio and return it to your
Customer Service Office (CSO) for
repair.
Off
Off
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Transmit Receive Unit (TRU)
1-25
Table 1-1
Transitions in the TRU3 LED state (continued)
State
Status
LED
ON
Description/Action
LOS FAIL CCH LCR
TX
On
In-service
—DCCH or
2T+C
Off
Off
On
Off
On
On
In-service
—TTC
(transmitter
active)
Off
Off
Off
Off
On
On
In-service
—TTC
(transmitter
inactive)
Off
Off
Off
Off
Off
LOS
On
On
Off
(Note
1)
Fault
Off
Off
Last Last Last
state state state
(Note
2)
Off
On
(Note
3)
Off
Off
During normal operation, the TX LED
turns on whenever the radio’s
transmitter is active.
Radio remains in this state until one of
the followings happens:
—external failure detected, radio goes
to state 7
—internal hardware failure detected,
radio goes to state 8
—radio taken out of service by the MTX
(SYBSY) or by an operator (MANB),
radio goes to state 2
This state indicates that a failure
outside the radio has occurred. Typical
loss of service conditions include: PA
fault, Link Access Protocol-D (LAPD)
link disconnection, or a loss of
connection to the Digital Signal
Processing Module (DSPM). The MTX
will take the radio out of service (state
2) once the LOS condition is reported
with the exception of loss connection to
DSPM. The radio is reported as inservice trouble state. Service is
restored when the connection to the
DSPM is re-established.
This state indicates that an internal
hardware fault is detected. The MTX
will take the radio out of service (state
2) once the fault is reported. The fault is
reported to the MTX as an MTX105 log.
Refer to the DualMode Radio Unit
Troubleshooting Guide, 411-2131-166,
for more information.
- End -
Note 1: Loss-of-service conditions which are not detected by the radio,
such as excessive SWERRs, do not cause the yellow LED to turn on
directly. However, if the ICP chooses to close the signalling connection to
the radio, the yellow LED will be activated indirectly and further
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troubleshooting will be required to isolate the exact cause of the loss of
service.
Note 2: In general, the TX LED is off (radio taken off-the-air) when the
radio is in the loss-of-service or radio-failure states. The only exception is
when the radio is operating in the fractional DCCH (2T+C) state and there
is a loss of connection to the DSPM. In this case, the loss-of-service
condition applies because the traffic channels within the radio are
unusable. However, the TX LED is on because the DCCH within the radio
is still active.
Note 3: When a fault is detected, the radio is taken SYSBSY and any
attempt to return the radio into service is expected to fail. It may be
necessary to replace the radio before proper operation can be achieved.
The Terminal Interface
The terminal interface, connected to the TRU is for the purposes of
installation, maintenance, tests, and status query, is an ASCII terminal. The
Operation, Administration and Maintenance (OA&M) commands are entered
by way of a VT100 (or compatible) terminal connected to the RS-232
interface on the front panel of the TRU. This allows maintenance, test, query,
and measurement functions to be performed without requiring the TRU to be
connected to the rest of the DMS-MTX* system.
CAUTION
Service interruption
Never put a TRU into the terminal interface mode when the
TRU is in an active call processing state. The call in progress
will be dropped.
Commands are typed into the terminal to set operating parameters and
perform control, maintenance, and status query functions. It is typically used
to bring the unit on air during installation and commissioning. There are no
switches, jumpers, or adjustable hardware elements within the TRU that need
to be accessed by the user.
All TRU operating parameters are controlled either from the ASCII terminal
or from a Maintenance and Administration Position (MAP*) terminal at the
MTX switch as part of call processing. The control from the MAP terminal is
called the Remote Radio Interface (RRIF) feature. Refer to the Remote Radio
InterFace Reference, 411-2131-115, for the RRIF commands.
Note: Not all OA&M commands are available for the TRU3 through
RRIF. The TRU3 does not support RRIF Layer 2, VBER, or RF
measurements in MTX08.
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Transmit Receive Unit (TRU)
1-27
The terminal interface can be operated in command line mode or in the more
convenient fullscreen monitor mode. The basic commands, with the same
functionality, are available in the command line mode as well as in the
fullscreen mode.
The AMPS/TDMA Fullscreen Monitor
The AMPS/TDMA Fullscreen Monitor is the primary user interface to the
DRU's OA&M capabilities. Two modes of operation are available; analog
(AMPS) mode and digital (TDMA) mode. The primary purpose of the
Fullscreen Monitor is to provide a mean for quickly commissioning a DRU in
a cell site. Additionally, it provides user-friendly access to the DRU's OA&M
test and maintenance functions so that problems in the DRU or the mobile can
be detected, diagnosed, and remedied. The Fullscreen Monitor is intended for
use on a DRU not in an active call processing state.
Note: The TRU3 does not support AMPS mode. However, the commands
for AMPS operation can still be entered in both the command line mode
or the fullscreen mode.
Fullscreen monitor setup
The terminal interface can be operated in command line mode or in the more
convenient fullscreen monitor mode. The basic commands, with the same
functionality, are available in the command line mode as well as in the
fullscreen mode.
The fullscreen monitor is the primary user interface to the OA&M capabilities
of the DRU. Two modes of operation are available; analog (AMPS) mode and
digital (TDMA) mode.
Connect a VT100 (or equivalent) terminal to the RS-232 port on the front panel
of the Transmit Receive Unit (TRU). By pressing the “Break” key on the
terminal keyboard, you can access the command line mode. The terminal will
display the following:
For the TRU 2:
TRU Terminal Interface
(C) Copyright 1990-1996 Bell Northern Research, Inc.
For the TRU3:
TRU-III Terminal Interface
(C) Copyright 1996-97 Nortel
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To enter the fullscreen mode, at the command line prompt (>), type in the
commands:
>SET LT OFF
>SET FS ON
The SET LT OFF command disables the LAPD timeout. If the TRU detects
loss of the LAPD link, it resets itself after 10-12 seconds. With the LAPD
timeout set off, the TRU does not reset, which is necessary for stand alone
testing.
The SET FS ON command clears the existing display and invokes the
fullscreen display in the AMPS mode. In the fullscreen monitor, the OA&M
commands are displayed and selected by their alphabetic code. The results of
each OA&M command are displayed at specific screen locations.
Figure 1-8 shows the fullscreen displays for the TRU2 and Figure 1-9 shows
the fullscreen for the TRU3. Table 1-2 shows a summary of the fullscreen
commands and these commands are explained in Table 1-3. Table 1-4 to Table
1-6 show and explain the command line mode commands.
The terminal screen is divided horizontally into a status area and a command
area. The bottom line of the terminal display is used as the command area;
you may enter the appropriate letter representing the command. Directly
above the command area is the output message line where status and output
messages, such as selection parameters and error messages, are displayed.
On-line help
Interfacing with the Fullscreen Monitor is simplified by the availability of online help. The user may type “HELP” or “?” in response to any prompt. A brief
paragraph describing the function of the DRU terminal interface is displayed.
Several on-line help categories are available. Each help category contains a
brief, one-line description of each command in that category. The following
categories of help commands are available:
• HELP HELP
Lists help categories
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•
HELP MTCE
Lists maintenance commands
•
HELP TESTS
Lists test commands
•
HELP MSR
List measurement and query commands
•
HELP MONITOR
List commands within the monitor subsystem
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Transmit Receive Unit (TRU)
1-29
Figure 1-8
Fullscreen display for the TRU2
AMPS Mode
---------TRU TERMINAL INTERFACE
(C)1990,1991 Northern Telecom, Inc.-----------
Load: TRU2AT79
PA FW: --------
EEPROM: Passed
PA PEC: --------
ROM:
RDRUAB04
PA HW: ----
HW Ver: rar S/N: 531DDERA
PA S/N: ---------------
AMPS STATUS
Channel:
---Synth Lock:
NO
PA Alarm:
off
Audio:
off
PA:
off
TxPwrIndex:
TxPwrStep:
4.00
MaxTxPwr:
27.00
SAT TX: 6000 ( on)
Compandor:
on
Loopback:
BCH
Tone Gen:
off
Antenna Port A: 1 B: 4
Antenna Path: DIV
Audio Sens RX: -18.0
Audio Sens TX: -18.0
------------------------------Signal Readings----------------------------------RX RSSI:
RX SAT:
RX ST:
Antenna Port:
RSSI Offset :
RSSI
0.0
0.0
0.0
0.0
0.0
0.0
----------------------------------COMMANDS-------------------------------------A) TDMA Mode
G) SAT Transmit
M) Set Antenna Port
S) Test TRU display
B) Set Channel
H) Change SAT
N) Set Path
T) Set Audio Sens
C) PA on/off
I) Tone Gen
O) Set RSSI Offset
U) Set TXPOWSTEP
D) PA LED on/off J) Loopback
P) Detect SAT,ST,RSSI X) Exit
E) Set TXPOWIDX
K) Compandor
Q) Detect ALL RSSI
Y) Restart TRU
F) Set MAXTXPOW
L) Wideband Data
R) RX/TX Audio
-------------------------------------------------------------------------------Screen Refresh completed.
Command prompt
Output message
Command menu
DRU status
TDMA Mode
---------TRU TERMINAL INTERFACE
(C)1990,1991 Northern Telecom, Inc.-----------
Load: TRU2AT79
PA FW: --------
EEPROM: Passed
PA PEC: --------
ROM:
RDRUAB04
PA HW: ----
HW Ver: rar S/N: 531DDERA
PA S/N: ---------------
TDMA STATUS
Channel:
---Synth Lock:
NO
PA Alarm:
off
PA:
off
TxPwrIndex:
TxPwrStep:
4.00
MaxTxPwr:
27.00
DVCC:
Slot:
Loopback:
Tone Gen:
01
BCH
off
Antenna Port A: 1 B: 4
Antenna Path: DIV
------------------------------Signal Readings----------------------------------RX RSSI:
RX DVCC
) :
Antenna Port:
RSSI Offset :
RSSI
0.0
0.0
0.0
0.0
0.0
0.0
----------------------------------COMMANDS-------------------------------------A)
B)
C)
D)
E)
AMPS Mode
Set Channel
PA on/off
PA LED on/off
Set TXPOWIDX
F)
G)
H)
I)
J)
Set MAXTXPOW
Set DVCC
Set Slot
Tone Gen
Loopback
M)
N)
O)
P)
Q)
Set Antenna Port
Set Path
Set RSSI Offset
Detect DVCC,RSSI
Detect ALL RSSI
S)
T)
U)
X)
Y)
Test TRU display
Standalone TX
Set TXPOWSTEP
Exit
Restart TRU
-------------------------------------------------------------------------------Screen Refresh completed.
Command prompt
Output message
Command menu
DRU status
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Figure 1-9
Fullscreen display for the TRU3
AMPS Mode
---------TRU TERMINAL INTERFACE
(C)1996,1997 Northern Telecom, Inc.-----------
Load: TRU31W40
PA FW: --------
CRC:
Passed
PA PEC: nthx51aa
Boot: BDRUAA01
PA HW: 5765
HW Ver: rq1 S/N: 530d8d0a
PA S/N: nntm61015ah7--
AMPS STATUS
Channel:
Synth Lock:
PA Alarm:
Audio:
367
yes
off
off
PA:
on
TxPwrIndex:
TxPwrStep:
4.00
MaxTxPwr:
47.00
SAT TX: 6000 (off)
Compandor:
off
Loopback:
off
Tone Gen:
off
Antenna Port A: 1 B: 4
Antenna Path: DIV
Audio Sens RX: -28.0
Audio Sens TX: -16.0
------------------------------Signal Readings----------------------------------RX RSSI:
RX SAT:
RX ST:
Antenna Port:
RSSI Offset :
RSSI
0.0
0.0
0.0
0.0
0.0
0.0
----------------------------------COMMANDS-------------------------------------A) TDMA Mode
G) SAT Transmit
M) Set Antenna Port
T) Set Audio Sens
B) Set Channel
H) Change SAT
N) Set Path
U) Set TXPOWSTEP
C) PA on/off
I) Tone Gen
O) Set RSSI Offset
X) Exit
D) PA LED on/off J) Loopback
P) Detect SAT,ST,RSSI Y) Restart TRU
E) Set TXPOWIDX
K) Compandor
Q) Detect ALL RSSI
F) Set MAXTXPOW
L) Wideband Data
R) RX/TX Audio
-------------------------------------------------------------------------------Screen Refresh completed.
Command prompt
Output message
Command menu
DRU status
TDMA Mode
---------TRU TERMINAL INTERFACE
(C)1996,1997 Northern Telecom, Inc.-----------
Load: TRU31W40
PA FW: --------
CRC:
Passed
PA PEC: nthx51aa
ROM:
BDRUAA01
PA HW: 5765
HW Ver: rq1 S/N: 530d8d0a
PA S/N: nntm61015ah7--
TDMA STATUS
Channel:
Synth Lock:
PA Alarm:
367
yes
off
PA:
off
TxPwrIndex:
TxPwrStep:
4.00
MaxTxPwr:
47.00
DVCC:
Slot:
Loopback:
Tone Gen:
01
off
off
Antenna Port A: 1 B: 4
Antenna Path: DIV
------------------------------Signal Readings----------------------------------RX RSSI:
RX DVCC
) :
Antenna Port:
RSSI Offset :
RSSI
0.0
0.0
0.0
0.0
0.0
0.0
----------------------------------COMMANDS-------------------------------------A)
B)
C)
D)
E)
AMPS Mode
Set Channel
PA on/off
PA LED on/off
Set TXPOWIDX
F)
G)
H)
I)
J)
Set MAXTXPOW
Set DVCC
Set Slot
Tone Gen
Loopback
M)
N)
O)
P)
Q)
Set Antenna Port
Set Path
Set RSSI Offset
Detect DVCC,RSSI
Detect ALL RSSI
T)
U)
X)
Y)
Standalone TX
Set TXPOWSTEP
Exit
Restart TRU
-------------------------------------------------------------------------------Screen Refresh completed.
Command prompt
411-2051-500
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Output message
00.01
November 1999
Command menu
DRU status
Nortel Networks Confidential
Transmit Receive Unit (TRU)
1-31
Fullscreen commands
Table 1-2 lists a set of the fullscreen commands. Some commands are only
applicable to the TRU in either the analog or digital mode; others are applicable
only when the TRU is in a particular state. Using such a command when the
TRU is not configured correctly results in the error message below:
That function is not available in the DRU's current state.
A command is entered on the command line at the > prompt. You must press
the “Return” key to execute the command. For some commands, additional
parameters need to be entered and a prompt will appear on the message line.
Enter the appropriate parameter and press the “Return” key to execute the
command. Only one command may be executed at a time.
Table 1-2
TRU Fullscreen command summary
Code
AMPS Mode
TDMA Mode
Change screen to TDMA mode display
Change screen to AMPS mode display
Set Channel
Set Channel
Set PA on/off
Set PA on/off
Set PA LED on/off
Set PA LED on/off
Set TXPOWIDX
Set TXPOWIDX
Set MAXTXPOW
Set MAXTXPOW
SAT Transmit
Set DVCC
Change SAT
Set SLOT
Set Tone Gen
Set Tone Gen
Set Loopback
Set Loopback
Set Compandor
—
Set Wideband Data
—
Set Antenna Port
Set Antenna Port
Set Path
Set Path
Set RSSI Offset
Set RSSI Offset
Detect SAT/ST/RSSI
Detect DVCC/RSSI
Detect ALL RSSI
Detect ALL RSSI
Set Rx/Tx Audio
—
Test TRU Display
Test TRU Display
Set Audio Sens
Standalone TX
Set TXPOWSTEP
Set TXPOWSTEP
Exit
Exit
Restart TRU
Restart TRU
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A complete description of the fullscreen commands is given in Table 1-3. This
table is broken into five groups according to the functions of the commands:
• Configuration functions for TRU operating parameters
•
Transmit functions
for TRU transmit status
•
Receive functions
for TRU receive status
•
AMPS mode functions
for functions available in AMPS mode only
•
TDMA mode functions
for functions available in TDMA mode only
Table 1-3
TRU Fullscreen commands
Configuration functions (available to both the AMPS and the TDMA modes):
Code
Command
Status
Action/Initial Value
Set Mode
AMPS
TDMA
Toggles between the AMPS mode display and the TDMA
mode display.
Set Channel
0000
Sets the current channel and updates the Channel field on
the display. If the TRU Synthesizer was able to lock to the
specified channel, the Synth Lock field displays "YES";
otherwise, the Channel field displays "----" and the Synth
Lock field displays "NO".
Set PA LED
on/off
Turns the alarm LED on the front panel of the MCPA on or
off. The status is shown in the PA Alarm field.
Set Tone
Gen
BCH
RF
Off
Turns on either the tone generation (1004 Hz) on the Bchannel to the MTX, the RF tone generation (1 kHz) on air,
or turns off the tone generation. The status is shown in the
Tone Gen field.
Set
Loopback
BCH
RF
Off
Sets either the B-Channel Audio Loopback (to MTX), the
RF Loopback (to mobile), or Off (no Loopback). The status
is shown in the Loopback field.
Test Display
(not available
for TRU3)
—
Verifies the TRU's 8-character LED display by alternately
showing the following three patterns on the LED display
until the “Return” key is pressed:
00000000
********
........
Exit
—
Leaves fullscreen monitor mode, clearing the screen and
returning to command line mode.
Restart TRU
Executes either a ROM level reset (C = COLD) or a
FLASH level restart (W = WARM). You are prompted for
the type of restart to be performed.
Note: This will restart the DRU and force an exit from the
fullscreen monitor mode.
Set PA on/off
on/off
Turns the TRU transmitter on or off. The status is shown in
the PA field.
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Transmit Receive Unit (TRU)
1-33
Table 1-3
TRU Fullscreen commands (continued)
Transmit functions (available to both the AMPS and the TDMA modes):
Code
Command
Status
Action/Initial Value
Set
TXPOWIDX
0..7
Sets the current TRU power level attenuation number. The
TRU has maximum output power when power level is set at
“0” (no attenuation). The status is shown in the Power Level
or TxPwrIndex field.
Note: Nortel Networks recommends that you set the power
level at “0” unless otherwise specified as a site requirement.
Set
MAXTXPOW
Defines the maximum power level (dBm) which maps to an
Attenuation Level number of “0” and updates the TRU
Power or MaxTxPwr field. Due to the nature of this
Note: These
command, it is not available if you have not previously set
values are for the TRU power level.
Note: If the TRU transmitter is on (C command) and the
NO PATYPE
used in Urban. power level is set (E command), the TRU output power
changes immediately when this command is entered.
Set
1..4
TXPOWSTEP
-1.0 dBm to
27.0 dBm
Sets the current MCPA power step size number (1.00 dB to
4.00 dB in 0.25 dB steps). The status is shown in the Power
Step or TxPwrStep field.
Note: Nortel Networks recommends that you set the power
step size at “4” unless otherwise specified as a site
requirement.
- continued -
Use the three TRU Power commands according to the following relationship
when adjusting the TRU output power:
TRU Output Power = MAXTXPOW - (TXPOWIDX x TXPOWSTEP)
Example:
If you require an output power of 15.75 dBm at the TRU output, you can use
either one of the following TRU power settings to obtain that output power.
TRU Power Settings
TRU Output
Max Power/
MAXTXPOW
Power Level/
TXPOWIDX
Power Step size/
TXPOWSTEP
Power (in dBm)
15.75
0 (no attenuation)
4.00 (default)
15.75 - (0 x 4.00) = 15.75
27.00 (default)
3.75
27.00 - (3 x 3.75) = 15.75
27.00 (default)
2.25
27.00 - (5 x 2.25) = 15.75
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Equipment operation
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Table 1-3
TRU Fullscreen commands (continued)
Receive functions (available to both the AMPS and the TDMA modes):
Code
Command
Status
Set Antenna
Port
(1 or 2 or 3)
(4 or 5 or 6)
Selects antenna ports to use on path A and B. The
Antenna Port field will show:
Port A: 1, 2 or 3
Port B: 4, 5 or 6
Note: Only 1 and 4 can be selected in Omni cell sites.
Set Path
DIV
Selects the antenna path. The status is shown in the
Antenna Path field. DIV indicates diversity switching
between paths A and B.
Set RSSI
Offset
xx.x
Parameters
for detector,
ant1, ant2
and ant3
must be
entered.
Sets the 3 RSSI Offsets (MCGAIN) for the ports on the
specified antenna path. Input values are limited to the
range -100 to +100; however, the offsets should be kept to
± 5 dB to keep RSSI values between -130 dBm and -30
dBm. (See the RSSI Offset tests in Chapter 11.)
Detect All
RSSI
—
Constantly measures RSSI detected on all the six antenna
ports until the “Return” key is pressed. Updates the six
RSSI fields on the right hand side of the Signal Readings
area on the display.
Note: The current path and port settings cannot be
determined after this command is executed. The
corresponding status fields will be cleared.
Signal
reading area
displays:
-000.0
Action/Initial Value
- continued Table 1-3
TRU Fullscreen commands (continued)
AMPS mode functions (available to the AMPS mode only):
Code
Command
Status
Action/Initial Value
Set SAT
Transmit
on/off
Turns on/off generation of SAT. The status is shown in the
SAT TX field.
Change SAT
5970
6000
6030
Sets the transmit SAT frequency. The selected SAT
frequency is shown in the SAT TX field.
Set
Compandor
on/off
Sets TX compression and RX expansion on or off. The
status is shown in the Compandor field.
Transmit
Wideband
Data
—
Enables wideband data transmission. The TRU will begin
to transmit wideband data at the currently selected TRU
power level. The wideband data transmission is disabled
by pressing the “Return” key.
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Transmit Receive Unit (TRU)
1-35
AMPS mode functions (available to the AMPS mode only):
Code
Command
Status
Action/Initial Value
Detect
SAT,ST,RSSI
SAT, ST,
RSSI, A (all)
Constantly measures SAT, ST, and RSSI detected on the
assigned port of the current path (set by the M and N
commands) until the “Return” key is pressed. Updates the
RX SAT, RX ST, and RSSI fields on the left hand side of the
Signal Readings area on the display.
Note: The M and N commands must be set prior to this
command.
Signal
reading area
displays:
-000.0
Set RX/TX
Audio
TX
RX
BOTH
OFF
TX—unmutes the TX audio; mutes the RX audio.
RX—mutes the TX audio; unmutes the RX audio.
BOTH (TX RX)—unmutes both TX and RX audio.
OFF—mutes both TX and RX audio.
The status is shown in the Audio field.
Set TX/RX
Audio Sens
TX -xx.x
RX -xx.x
Sets the audio sensitivity for the entered TX or RX path.
The selected audio sensitivity levels are shown in the
Audio Sens fields.
The limits for the TX and RX audio sensitivity are:
TX Sens: -28.0 dBm ≤ -xx.x ≤ -10.0 dBm
RX Sens: -28.0 dBm ≤ -xx.x ≤ -16.0 dBm
Note: Set both TX and RX Sens to -18.0 in the tests
described in this manual.
- continued -
Table 1-3
TRU Fullscreen commands (continued)
TDMA mode functions (available to the TDMA mode only):
Code
Command
Status
Action/Initial Value
Set DVCC
Sets the Digital Verification Color Code (DVCC) transmitted
01..FF
(hexadecimal) by the TRU when the TRU transmitter is enabled. DVCC is
an 8-bit verification code transmitted between the mobile
and the base station. It is used in TDMA cellular to
differentiate between mobiles on the same frequency.
Set Slot
1..3
The TRU currently supports Full Rate (3 slots) coding, that
is, three mobiles sharing one frequency.
This command sets the current TDMA slot used by the
TRU for DVCC transmission and signal measurements.
Detect DVCC,
RSSI
-000.0
Y/N
Displays if current DVCC setting is detected and/or the
RSSI measurement on the current slot of the antenna
setup. The status will be displayed in the RX RSSI and RX
DVCC fields.
Standalone
TX
on/off
Allows the TRU2 and TRU3 to transmit without using a
single-channel PA (see PA type in Table 1-4). This is used
for either low power testing or on low power cell sites.
- End -
Wireless Solutions DualMode 800 Enclosure Maintenance Manual
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1-36
Equipment operation
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Command line mode commands
The Command line mode consists of three different sets of commands:
• maintenance commands
•
measurement commands
•
test commands
Command line mode maintenance commands
Each function in the maintenance command suite may be used by an operator
to aid in the diagnosis and repair of faults in the TRU. There are a large
number of functions to set up loopbacks and set calibration parameters. In
addition, there are some periodic maintenance functions that must be
performed at regular intervals.
Note: The Command line mode and the Fullscreen mode are intended for
testing purposes only. Do not place the TRU into either one of these
modes during call processing. The call in progress will be dropped.
Table 1-4 gives the name, command, state, and action for the command line
mode maintenance commands. These commands apply to both the TRU2 and
TRU3 unless stated otherwise.
Table 1-4
Command line mode maintenance commands
Name
Terminal
Command
Description
Personality
Allowed
Antenna Switch
Mode
Set ASWMODE A|B VCH
Fixed
Sets the antenna switch mode for the given
path. The path can be A(0) or B(1). The mode is
fixed.
Blinking Display
(TRU2 only)
Set BLINKING
on|off
Any
Causes the front panel display of the TRU2 to
blink on and off if set ON.
Clear SWERR
Table
Set RSETSWERR
Any
Clears the SWERR table and resets the current
SWERR count to zero.
Compandor
Control
Set
COMPRESSION|
EXPANSION on|off
VCH
Controls the dynamic range compression and
expansion of the TRU compandor.
TTC
Sets the DVCC value for the slot specified or all
slots if ”ALL” is entered as the slot number.
Display Message Set DISPLAY string Any
(TRU2 only)
Sets the front panel display on the TRU2 to the
specified string.
Set DVCC
Digital
Verification Color dvcc_value
Code
slot_number
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Transmit Receive Unit (TRU)
1-37
Table 1-4
Command line mode maintenance commands (continued)
Name
Terminal
Command
Personality
Allowed
DRU Reset
Execute RESET
Any
Causes the DRU to completely reset all of its
systems and restart processing at the ROM
level.
DRU Restart
Execute
RESTARTFLASH
Any
Causes the DRU to restart processing within
the flash load.
Enable
Fullscreen Mode
Set FS on
VCH, CCH, Enables the Fullscreen mode of the terminal
ALR, or
interface.
Maint.
Fault Simulation
Run FAULTSIM
fault
Any
Simulates the specified fault by sending the
fault up to the ICP.
Installation
Calibration
Set INSTCAL
dB_level
VCH,
CCH, or
TTC
Provides the capability to correct the power
reading (range: ± 100dB; 0.01 dB resolution).
LAPD Timeout
Control
Set LT|
LAPDTIMEOUT
on|off
Any
Enables/disables the LAPD timeout. If the TRU
detects loss of the LAPD link, it resets itself
after 10-12 seconds. With the LAPD timeout set
off, the TRU does not reset, which is necessary
for stand alone testing.
Message
Injection
Run INJECT from|to Any
ICP|MPA|DSP bytes
Note: MPA not
supported by Urban
Injects the specified message trace (bytes) at
the specified interface point in the specified
direction.
Message Trace
Control
Set TRACE from|to Any
ICP|MPA|DSP
on|off
Note: MPA not
supported by Urban
Enables/disables message trace at the
specified interface point in the specified
direction.
Description
MPA LED On/Off Set MPALED on/off
(Not used in
Urban)
Any
Turns the fault indicator LED on MPA module
on or off.
Nominal
Application Gain
Set NOMGAIN
dB_level
VCH,
CCH, or
TTC
Provides a method of compensating for nominal
losses or gains as a result of cell site hardware
used with the TRU (range: ± 100dB; 0.01 dB
resolution).
OM Simulation
Run OMSIM omtype Any
Pegs the occurrence of the specified OM.
- continued -
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1-38
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Table 1-4
Command line mode maintenance commands (continued)
Name
Terminal
Command
Personality
Allowed
Description
PA On/Off
Set PA on|off
VCH, CCH, Turns the power amplifier (transmitter) on/off.
or TTC
PA LED On/Off
Set PALED on/off
Any
PA Type
Set PATYPE type
VCH, CCH, Allows for the setting of the type of PA being
used: MPA indicates that a MPA is being used;
or TTC
SCLPA indicates that a SCLPA is being used;
NONE indicates that no PA is used - the TRU is
using its own internal PA to output a modulated
signal.
Note: DualMode
800 Enclosure
supports only the
NONE mode.
Turns the fault indicator LED on MCPA module
on or off.
VCH
Establishes a ”nailed” connection for the given
antenna.
Path Antenna
Select
Set DIVPORT
path_A_port:1|2|3
path_B_port:4|5|6
Receive Path
Selection
Set PATH
VCH
A|B|CURRENT|DIV
Set the diversity receiver to be either the A(0) or
B(1) path, or enable diversity switching (2).
Receive SAT
Color Code
Set RXSATCC
detector cc
VCH
Configures the SAT detector to look for
specified color code.
Rx Audio On/Off
Set RXAUDIO
on|off
VCH
Turns on (unmute) or off (mute) the transceiver
audio output upstream (to the ICRM).
SAT Frequency
Select
Set TXSATCC cc
VCH
Selects frequency to be used for SAT
generation.
SAT Generation
On/Off
Set SATGEN on|off
VCH
Turns on/off generation of supervisory audio
tone.
Set Audio
Sensitivity
Set AUDSENS
TX|RX dBm_value
VCH
Sets the audio sensitivity for the transmit or
receive paths.
Set C-Side
Loopback
Set BCHLOOP
on|off
All but
maint.
Enables/disables TCM loopback to the ICRM.
Set C-Side Tone
Generation
Set BCHTONE
on|off
VCH
Enables/disables tone generation to the ICRM.
Set Channel
Set CHANNEL chan All but
maint.
Sets the receive and transmit channel to the
given value.
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Transmit Receive Unit (TRU)
1-39
Table 1-4
Command line mode maintenance commands (continued)
Name
Terminal
Command
Personality
Allowed
Description
Set Mobile
Loopback
Set RFLOOP on|off VCH, CCH
Enables/disables the RF loopback capability of
the TRU.
Set Multicoupler
Gain
Set MCGAIN A|B
dB_loss1 dB_loss2
dB_loss3
Sets the compensation for the gain through the
antenna and multicoupler system for the
antennas connected to the specified path.
Any
Set PA Maximum Set MAXTXPOW
Power Level
dBm_level
VCH, CCH, Sets the output power of the MCPA to the
or TTC
specified dBm value with a resolution of 0.01
dB.
Set PA Power
index
Set TXPOWIDX
index
VCH, CCH, Sets the MCPA power to the specified dpc
or TTC
index. The index is an integer (from 0 to 7) that
corresponds to a dBm power level.
Set PA Power
Step
Set TXPOWSTEP
dB_adjustment
VCH, CCH, Adjusts the output power DPC stepsize of the
or TTC
MCPA by the amount specified. The power step
value can be 0 to 100 dB in steps of 0.01 dB.
Set Personality
Set PERS
Any
ACC|ALR|AVC|
TLR|TTC
Note: The TRU3
supports DCCH and
TTC only
The TRU is reset and set to the given
personality. The personality may be IS-54 CCH,
AMPS LCR, AMPS VCH, TDMA LCR, or TDMA
TTC.
Set Transmission Set TRANSMIT
on|off
VCH, CCH, Enables/disables the transmitter in the TRU.
or TTC
This command functions the same as the ”Set
PA on|off” command.
SWERR
Simulation
Any
Logs an artificial software error.
VCH
Turns on/off generation of transmitter test tone.
Set TXAUDIO on|off VCH
Turns on (unmute) or off (mute) the transceiver
audio output downstream (to the mobile).
Run SWERRSIM
class code
Transmitter Tone Set RFGEN on|off
Generation
Control
Tx Audio On/Off
- End -
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1-40
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Command line mode measurement commands
Measurements of operational parameters are taken periodically and on
demand from the ICP or the terminal interface. If a measurement exceeds a
threshold value, the ICP receives an alarm message. Table 1-5 gives the name,
command, state, and action for the Command line mode measurement
commands.
Table 1-5
Command line mode measurement commands
Name
Terminal
Command
Description
Personality
Allowed
Audio Sensitivity
Settings
Query AUDSENS
Continuous
Status Display
Query STATUS
VCH
on|off DIV|ALL|CUR
R|ST|SAT|A
VCH
The audio sensitivity settings in dBm for the
transmit and receive paths.
Enables/disables a continuous display of
channel number, RSSI, SAT, and ST of the
diversity port or the channel number and RSSI
readings from each port.
Query DVCC
Digital
Verification Color
Code
TTC
The DVCC status for each slot.
Display SWERR
Table
Query SWERR
Any
The SWERR Class, SWERR Code, and
associated information words.
Hardware
Version Number
Query HWVERS
Any
The hardware release number of the TRU
being queried.
MPA or PA
Query MPAFW or
Firmware Version PAFW
Number
Any
The MPA/SCLPA firmware version number of
the DRU being queried.
Note: DualMode 800 Enclosure does not
support MPA or SCLPA.
Multicoupler Gain Query MCGAIN
Settings
Any
The multicoupler gain compensation in dBm for
each antenna on both receive paths.
In TRU3, the status indicates the actual SAT
value.
PA Maximum
Power Setting
Query MAXTXPOW VCH, CCH, The adjusted maximum TX power setting in
or TTC
dBm, stored in the TRU and the delta adjust
from the MCPA.
PA Power Step
Size
Query
TXPOWSTEP
VCH, CCH, The adjusted TX power step size setting in dB,
or TTC
stored in the TRU and the delta adjust from the
MCPA.
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Transmit Receive Unit (TRU)
1-41
Table 1-5
Command line mode measurement commands (continued)
Name
Terminal
Command
Personality
Allowed
Description
PA status
Query PASTATUS
Any
The TX information (PA type, current power,
power reference, step size, DPC index, and
alarm status) being queried.
Previous Uptime
Counter
Query
PREVUPTIME
Any
The time that the DRU had operated before the
last reset in days, hours, minutes.
Radio Load
status
Query LOAD
Any
For obtaining load name of the TRU.
Radio status
Query RADIO
(TRU3 only)
Any
For obtaining information on the status of the
TRU3. This information is provided through an
alphanumeric display on the TRU2.
Reset reason
Query
RESETREASON
Any
When the DRU is reset, a reason code is stored
in a reserved area of memory and can be read
when the DRU is active again to give the
reason for the last reset. If no reason is stored,
then the reset was caused by some unsolicited
event.
RSSI
Measurement
Query RSSI
Any
In the TTC state, indicates RSSI readings for
each slot. In other states, indicates current
RSSI reading at the diversity switch.
SAT Status
Query SAT detector VCH
Indicates that SAT status on the receive path
for the current SAT color code.
In TRU3, the status indicates the actual SAT
value.
ST Status
Query ST
VCH
Indicates the ST status on the receive path.
Uptime Counter
Query UPTIME
Any
The time that the DRU has been operating
since the last reset in days, hours, minutes.
- End -
Wireless Solutions DualMode 800 Enclosure Maintenance Manual
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Command line mode test commands
Testing ensures the proper working order of the DRU’s components. Each test
result is sent to the ICP by request or regular audit. Testing can be initiated by
entering the appropriate command from the ASCII terminal, by a message
sent from the ICP, or by regular audits on the DRU. An audit test failure
initiates an alarm unless the alarms are disabled. Table 1-6 gives the name,
command, state, and action for the Command line mode test commands.
Table 1-6
Command line mode test commands
Name
Terminal
Command
Action/Initial value
Personality
Allowed
Calibration Table
Sanity Tests (For
TRU2 only)
TEST EEPROM
Any
Calibration information is stored in EEPROM
along with an associated CRC. This test
calculates each table’s CRC and compares to
the stored CRC. If a table has not been written,
the result is ”n/a”.
DSP Sanity Test
TEST DSP ALL
Maint.
This test checks the basic sanity of the DSPs
by checking for basic messaging ability in each
one.
Flash Load CRC
Test
TEST FLASH
Any
This test reads all data stored in flash
EEPROM, calculates the CRC, and compares
this value against the CRC stored in the flash
EEPROM.
Individual DSP
Sanity Test
TEST DSP dspid# Maint.
This test is similar to the previous one except
that the sanity test is only run on a particular
DSP chip.
RAM Read/Write
Test (For TRU2
only)
TEST RAM
The read/write memory is checked to ensure
that all locations can be written to and read, and
that each address accesses a unique memory
location.
Any
- End -
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1-43
Multi-Channel Power Amplifier (MCPA)
During installation or expansion of a DualMode 800 Enclosure, you need to
set the output power of the Multi-Channel Power Amplifier (MCPA) to the
desired level of the cell/sector. You can use the MCPA software program (PEC
NTFC07BC), provided with the MCPA, to set the output power. This software
program comes in two floppy disks and it works with a computer (a PC or a
laptop) using Windows 95. To use the software for setting the MCPA output,
you need to:
1. install the software program on to your computer
2. run the program on the computer
3. if required, download the firmware for the MCPA shelf from the computer
to the shelf
Note: For new cell sites/MCPA shelves, the firmware is downloaded at
the factory. This step is required only if you are upgrading the firmware to
a newer version.
4. enter the per channel output power and the number of channels for the
MCPA shelf
5. initialize the power setting
Installing the MCPA software program
Use the following procedure to install the MCPA software program on to your
computer:
1. Place disk 1 of the software program into your computer.
2. Run the setup program and follow the on-screen prompts. The setup
program automatically sets up the ‘Nortel gain’ program in the Start
menu.
Running the MCPA software on the computer
To run the ‘Nortel gain’ program on the computer, use the following procedure:
1. Turn off the power to the computer and the MCPA shelf.
2. Connect from an available serial communications port on the computer,
using a null modem cable, to the RS232 connector (J6) on the backplane
of the MCPA shelf. Make sure that the connection is secure. The
following lists the pin-outs of the connectors:
9-pin male connector
Pin 2
to
9-pin female connector
Pin 3
Pin 3
Pin 2
Pin 5
Pin 5
Pin 8
Pin 8
Note: Do NOT make any connections to the other pins.
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Equipment operation
Nortel Networks Confidential
3. Turn on the power to the computer and the MCPA shelf.
4. Start the ‘Nortel gain’ program from the Start menu on the computer. The
selection menu for the MCPA will pop out (see Figure 1-10). Select the
100W MCPA system.
Figure 1-10
Selection menu for the MCPA
Powerwave/Nortel Model NTFC07BB
50W MCPA
System
100W MCPA
System
Exit
5. The power setting menu for the MCPA will pop out (see Figure 1-11).
Figure 1-11
Power setting menu for the MCPA
Universal Enclosure System
File
CommPort
Download
About
Status
Temperature
35.652
Current output power
59.89
Watts
Maximum available
output power
100
Watts
Program Gain Initalization
Watts
Target output power per channel
2.5
Channels
Number of channels
Start Initalization
Firmware Version 2.1
24
Shipping parameter
10:22 AM
6. Click on the Comm Port parameter on the menu. Set the Comm Port
(COMM1, 2, 3, or 4) parameter to match the physically-connected serial
communications port on the computer.
Note: To verify communications between the computer and the MCPA
shelf, check for a temperature reading on the menu. If there is no
temperature reading, the Comm Port parameter may not match the
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Multi-Channel Power Amplifier (MCPA)
1-45
communications port on the computer. Select the right port on the menu.
You can also check for communications by turning on or off the power of
an MCPA module using the RF ON switch on the front panel of the
module. The maximum available power reading on the menu should
change according to the number of powered-on MCPA modules (120W
for three modules, 80W for two modules, and 40W for one module).
If necessary, restart the software program to re-establish communications.
Fixing the ‘Run-time error’ problem
The reason you will get a ‘Run-time error’ is when choosing a comm port that
is not available. Verify that no other program is open and using the comm port
that the MCPA software is trying to use. If a ‘Run-time error’ message appears
every time you try to run the software, use the following procedure to fix the
problem:
1. Use the Windows Explorer to view the Windows directory.
2. Double-click on the ‘REGEDIT.EXE’ file. A Registry Editor will open.
3. Double-click on the directory ‘HKEY_CURRENT_USER’.
4. Double-click on the directory ‘SOFTWARE’.
5. Double-click on the directory ‘VB and VBA Program Settings’.
6. Double-click on the directory ‘Powerwave RD Testing’.
7. Double-click on the directory ‘System’.
8. Double-click on the ‘CommAlarmBoard’ file in the file panel.
9. A dialog box will open and a ‘1’ should be typed in the ‘value data’ entry
box. This refers to Comm Port 1. If a ‘1’ is already in the entry box, you
might want to try 2, 3 or 4.
10. Choose ‘OK’. The number ’1’ or the number you entered should be
displayed on the data column next to the CommAlarmBoard.
11. Close the Registry Editor.
12. Run the MCPA software again.
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Equipment operation
Nortel Networks Confidential
Downloading the MCPA firmware to the MCPA shelf (if required)
Note: This procedure is required only if you need to upgrade the MCPA
firmware from version 2.1 to a newer version.
IMPORTANT
Power to the MCPA shelf must remain on during the
downloading period.
Use the following procedure if you need to download the firmware to the MCPA
shelf:
1. Run the ‘Nortel gain’ program by performing Steps 1 to 5 of the
procedure listed in the Running the MCPA software on the computer
section. The power setting menu will pop out (see Figure 1-11).
2. At the menu, click on the Download parameter and then select the
software version, for example, NTRACK2_2.HEX.
3. At the ‘Powerwave Technologies’ menu, select ‘Download’.
4. At the ‘Warning’ menu, select ‘OK’. The screen will show the following:
5. Midway through the download process, the secreen will turn to the
following:
6. When download is complete, the software will display ‘Download is
complete’ on the screen. Click ‘OK’. The shelf is ready for operation.
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1-47
Setting the MCPA output power
After installing the software on the computer or downloading the firmware to
the MCPA shelf, you can begin to set the output power for the MCPA shelf.
The MCPA output power setting determines the per carrier power as well as
the maximum power to be transmitted by the MCPA modules. Here are some
examples of how to calculate and set the MCPA output power.
IMPORTANT
The calculation refers to output at the MCPA shelf. If you need
the output power at the antenna port of the duplexer, you must
add the insertion loss into your calculation.
•
If your cell/sector has 16 channels and you want to transmit an output
power of 2.5 watts per channel, enter:
2.5 in the “Target output power per channel” box, and
16 in the “Number of channels” box
This sets the per channel output power to 2.5 watts and the total MCPA
output power of the 16 channels is 40 watts (16 channels x 2.5 watts).
•
If the capacity of the cell/sector is reduced to 12 channels, the per channel
output power remains at 2.5 watts while the total MCPA output power is
reduced to 30 watts (12 channels x 2.5 watts).
In this case, you do not need to set the power level again if the per channel
output power is at the desired level. However, if you need a new per
channel power level, you have to set the output power level again.
•
If the capacity of the cell/sector is increased to 24 channels, the per
channel output power decreases to 1.67 watts while the total MCPA
output power remains at 40 watts (24 channels x 1.67 watts).
In this case, if you want to maintain the per channel output power at 2.5
watts, you need to enter the requirements again. So, enter:
2.5 in the “Target output power per channel” box, and
24 in the “Number of channels” box
This sets the per channel output power to 2.5 watts and the total MCPA
output power of the 24 channels is 60 watts (24 channels x 2.5 watts).
Note: You must use two MCPA modules to obtain a total output power of
higher than 100 watts.
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Equipment operation
Nortel Networks Confidential
Power setup procedure
IMPORTANT
Nortel Networks recommends that ALL channels (with at least
eight channels) be turned on at the time of initial power
setting. Otherwise, accuracy of the output power may be
affected.
To set the MCPA output power, use the following procedure:
1. Run the ‘Nortel gain’ program by performing Steps 1 to 5 of the
procedure listed in the Running the MCPA software on the computer
section. The power setting menu will pop out (see Figure 1-11).
2. Enter the target output power and the number of channels supported by
the MCPA shelf in their respective areas on the menu.
3. Initialize the setting by clicking the Start Initialization menu bar. If the
Start Initialization bar is not active (grayed out) on the menu, re-entering
the output power level will bring it on (active) again.
4. A prompt requiring that all carriers are on will appear. Make sure that the
number of turned-on carriers (TRUs) matches the number of channels
entered. Click ‘OK’.
IMPORTANT
Suppose that your cell/sector is using 16 channels at the time
of the power set up and you plan to expand it to 24 channels in
the future. You can enter 24 as your number of channels for the
cell/sector. However, for output accuracy, you should have all
24 channels turned on at the time of initialization. If you do not
have the eight expansion channels ready, it is best to keep the
number of channels to 16 at this time and perform
initialization again at the time when the cell/sector expands to
24 channels.
5. At the ‘Initialization Done’ prompt, click ‘OK’. Power set up is
complete.
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Periodic maintenance
This section briefly discusses all aspects of cell site maintenance, and when
necessary, refers you to detailed testing procedures in other operational tests
in this manual.
Periodic maintenance records
Periodic maintenance helps you in two ways:
• it allows you to detect and replace degraded equipment before it affects
service
•
it allows you to take steps to protect equipment from damage or
degradation
To support these functions, you must keep records. Records allow you to:
• recognize deteriorating performance by comparing current and past test
results
•
ensure that all steps required to protect equipment have been taken
•
create a maintenance history of a cell site; thereby allowing you to plan
for the future and predict future maintenance needs
•
provide information to decide sparing levels and ‘out of expectation’
failure level for specific equipment
For maximum benefit, maintenance records should be kept on site and should
be well organized so that call-out staff have access to and can determine the
maintenance history of a particular site. Referenced documents such as this
manual will contain blank forms for recording specific test results. These
forms should be copied as required and included with your records.
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Periodic maintenance
Equipment in a DualMode 800 Enclosure
Figure 2-1 shows the location of equipment in a DualMode 800 Enclosure.
Figure 2-1
Equipment layout of a DualMode 800 Enclosure
Bay 1
Bay 2
MCPA2
Bay 3
MCPA4
MCPA Shelf1
MCPA6
MCPA Shelf2
MCPA1
MCPA Shelf3
MCPA3
MCPA5
17
TRU
Shelf3
24
41
TRU
Shelf6
48
65
TRU
Shelf9
72
TRU
Shelf2
16
33
TRU
Shelf5
40
57
TRU
Shelf8
64
1 2
TRU
Shelf1
7 8
25 26
TRU
Shelf4
31 32
49 50
TRU
Shelf7
55 56
RIP1
RIP2
PCS
CSU
RIP3
DCSM
Rectifiers
Rectifiers
ICRM
ACU
HSMO
ERMC1
ERMC2
DCLC
ERMC3
Battery Pedestal
Legends:
ACU
Alarm Control Unit
CSU
Channel Service Unit
DCLC DC Load Center
DCSM DualMode Cell Site Monitor
ERMC Enhanced Receive MultiCoupler
ICRM Integrated Cellular Remote Module
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MCPA Multi-Channel Power Amplifier
PCS
Power Control Shelf
RIP
Rack Interface Panel
TRU
Transmit Receive Unit
November 1999
Interface
Module
Transmission facilities
2-3
Transmit Receive Unit (TRU) and Multi-Channel Power Amplifier (MCPA)
The Transmit Receive Unit (TRU) needs no periodic testing in either the
analog or the digital mode — only do testing if you suspect a fault or want to
verify correct operation. The bit error rate (BER) test is typically used for
troubleshooting. BER is defined as the ratio of erroneous bits to the total
number of received bits in a transmission system. Another troubleshooting
test is the TDMA Modulation Accuracy Test which measures the Error Vector
Magnitude(EVM). The Multi-Channel Power Amplifier (MCPA) should be
tested for power output once a year. For these tests, refer to Chapter 11,
DualMode Radio Unit Testing, in this manual.
High Stability Master Oscillator (HSMO)
In dual-mode (mixed analog and digital) or digital sites, the HSMO frequency
should be checked once a year. In analog cell sites, the frequency is not as
critical and the HSMO need not be tested at all. Any problems with the
HSMO in an all analog cell site will show up in the TRU transmit frequency
tests. Refer to the tests in Chapter 5, HSMO Tests, in this manual.
Alarm Control Unit (ACU)
The ACU alarm input points for equipment such as fans, over-temperature
and door switches should be verified once a year. Alarm output contacts and
alarm reactions should be verified at the same time. Refer to the tests in
Chapter 8, ACU Tests, in this manual.
Transmit path insertion loss
Check the insertion loss of the transmit path once a year or as required by
base station carrier power level test results.
Fuses/breakers/fans
The ACU monitors the status of the fuses, breakers and fans. It is good
practice whenever you are at the cell site to visually inspect the fuses, check
that the correct breakers are on and that the fans are working.
Other equipment
Equipment not already specifically mentioned does not require periodic
maintenance.
Transmission facilities
Transmission facilities include pressurized transmission lines, microwave
radio equipment and any copper facilities. It is important that your facilities
are in good condition, otherwise cell site performance might be
compromised. See recommended maintenance intervals from the
manufacturer for the specific equipment.
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2-4
Periodic maintenance
Microwave
Refer to the manufacturer’s instructions for periodic maintenance.
Transmission level and noise tests should be conducted once a year.
Copper audio link
The susceptibility of copper to noise and level problems requires more
frequent checks than digital or microwave facilities. Perform noise and level
checks quarterly on the T-1 transmission facilities.
Power
Clean, reliable power is essential to your cell site. The following are generic
periodic maintenance recommendations. Consult the manufacturer's
documentation for specific maintenance and specifications.
Battery
The batteries used in the DualMode 800 Enclosure are virtually maintenance
free. For routine check or maintenance procedures, refer to manufacturer's
recommendation.
Rectifiers
The rectifiers used in the DualMode 800 Enclosure are virtually maintenance
free. For information, refer to the DualMode 800 Enclosure Functional
Description, 411-2051-100.
Fuses/breakers
Whenever you arrive an enclosure site, it is a good idea to verify that the
circuit breakers are on and the fuses are good.
Cabling and connections
Whenever equipment is installed or changed, check the cabling and
connections. Take note of any suspect cables that give you problems from
time to time.
Inside grounding
Inside grounding performs two functions: it prevents noise from one unit
getting into other equipment, and it ties all equipment together for protection.
In addition to checking for and repairing any deterioration of the grounding
system, you should also check to see that all new equipment installed at the
site is grounded properly. (Refer to the DualMode 800 Enclosure Power and
Ground Verification.)
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Outside grounding
2-5
Bay bonding
Individual bays in a line-up should be bonded together with 3/8 inch or larger
bolts with star washers bearing on plated metal or conductive tape.
Cabling and connections
Each frame line-up should be grounded to the principle ground bar with #2
AWG insulated wire. There should be individual drops from this cable to each
frame. The frame grounds should not be connected to the DC return bar at the
top of the frames nor should they be attached to the halo ground when used.
Principle ground bar
All inside ground connections should lead back to the principle ground bar,
which is then connected to the outside ground field and the AC ground. Check
all connections and ensure that new or changed equipment is properly
grounded. If there is a water pipe at the site, the principle ground bar should
be connected to it.
Transmission line entrance
The transmission line to the antenna should be lightening-protected where it
comes into the enclosure. Check the condition of the grounding connections
once a year and also following any severe lightening storm activity.
Outside grounding
A typical cell site, with its tall metal structures and antennas, is an open
invitation to a lightening strike. To avoid cell site degradation or total loss due
to electrical storm activity, you should inspect your grounding system just
before the local thunderstorm season. Checking the outside ground can be
part of a site walk-around check, where you also check antennas, cables,
structures, lighting and foundations.
Tower and associated structures
Use a pair of binoculars or a spotting scope to verify that the air terminal
(lightning rod) and antennas are still attached to the tower and grounding
system. Verify that:
• the antenna feed cables are grounded at both ends
•
the cables and clamps attaching the tower and waveguide bridge to the
grounding system are secure
•
the cables and clamps connecting the guy wires to the grounding system
are secure
•
transmission cables are grounded at both the top and the bottom of the
tower, and at the enclosure entrance
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Periodic maintenance
Building sheath, fences and other equipment
If the site has metal walls, roof or base, the metal components must be
grounded. The cell site fence and any fuel tanks or other metal structures must
be grounded as well. Check that grounding cables and clamps are secure.
Antennas and tower
Structure
Detailed inspection of towers should be performed every one to three years by
an experienced inspector who can climb the tower and check all components.
Cell site maintenance personnel can perform an effective partial inspection
without leaving the ground, and this is recommended:
• once a year
•
following a severe storm
•
following a prolonged period of heavy icing
Use binoculars or a spotting scope if necessary. To perform a partial inspection:
• check the tower base for cracks, concrete break up and upheaval
•
check all guy anchors for cracks or upheaval
•
check guy tension and attachment
•
check fasteners for security
•
check all components for rust
•
check for flaking paint (often a sign of over-stress)
Tower lighting
Visually confirm operation of the tower lights every time you are at the site
after dark. When the tower is climbed for structural inspection, the lights
should be thoroughly checked at the same time.
Grounding
Check all grounding that is accessible from the surface during your outside
grounding check. When the tower is climbed for structural inspection,
grounding on the higher parts of the tower should be checked at the same
time.
Paint
Painted towers need to be re-painted every few years. Check the over-all
condition of the paint on an annual basis and re-paint as necessary.
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Feed
Check that the transmission line is adequately supported and protected
between the enclosure and the antenna tower.
Antennas
When the tower is climbed for structural inspection, antennas should be
inspected as well. Check for:
• correct orientation and tilt
•
crack, dents and burns
•
fasteners, attachment and security
•
transmission line and ground attachment security
•
audible gas leakage in pressurized systems
Pressurized transmission lines
If a pressurized transmission line to the antenna is used, check the nitrogen
tank pressure and manifold pressure every visit. Check the dehydrator at the
same time.
Site performance
The ultimate measure of the cell site’s condition is the cell site’s actual
measured performance. Site performance should be tested once a year and
can be gauged by the following tests. It should be taken into consideration
that coverage and handoffs can be impacted by seasons and weather.
Fringe coverage
Using the most recent coverage maps, take a test mobile and drive to the
fringe of the site coverage area with a call established to confirm coverage.
Most mobiles are able to access signal strength function mode.
Handoff checks
Using the standard drive defined for the site or system acceptance procedures,
with a call established drive across the cell boundaries. Confirm that the
handoffs occur in the appropriate places and that there is sufficient hysteresis
to prevent ping-ponging of calls. You can use a test mobile with channelindicating firmware to check the exact location of the handoffs.
Antenna sweep
Measure the reflected power from the antenna across the entire cellular band
(receive and transmit) to check for hidden damage or deterioration of the
antennas. Refer to Chapter 7, Antenna Tests, in this manual.
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Periodic maintenance
Housekeeping
Heating/air conditioning
Proper temperature is essential to the functioning of the enclosure. Check any
alarms due to the environment, such as high or low temperature, every time
you are at the site.
Dust control
Keep dust levels to a minimum by mopping the floor once a month, taking
care not to get the equipment wet. Whenever you remove a transceiver or
power amplifier, wipe off the dust on the unit and shelf slides. Dust
accumulation on circuit boards and heat sinks interferes with heat dissipation
and shortens the life of the equipment. Dust in the air clogs fans and air
conditioners, also raising the temperature.
Statutory requirements
Fire equipment, hazard signs and exit signs may be required by law. Make
sure required signs are present and safety equipment is maintained.
Site licenses
Radio and tower and business licenses are often required to operate a cell site.
It may be worth your while to check up on these once a year to ensure that
they are being maintained, whether they are located on the site or with your
company’s legal department.
Trash and loose articles
Keep the inside of your enclosure as clean and tidy as possible. Trash and
loose articles pose fire and tripping hazards and should be removed after
every visit.
Site grounds keeping
Tall grass can present a fire hazard; poorly kept trees can lean on or fall on the
enclosure. Snow and ice removal on and around the enclosure may be a
statutory or legal liability requirement in some jurisdictions. Grounds keeping
is often contracted out to a specialty firm.
Building service
If the enclosure uses AC mains service from overhead poles, take a look at the
drop and service entrance once a year. Look for obviously damaged insulation
and threats from overhanging trees.
Security
Check fences, gates, barbed wire and razor ribbon, both around the site and
around the tower guy anchors. Check door locks and gate locks before leaving
the site.
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2-9
Manuals and records
Manuals and site logs should be organized and readily accessible to call-out
staff. All records should be completed before leaving the site. All logs and
records should be kept on-site for instant availability.
Schedule for periodic cell site maintenance
Regularly scheduled visits are important for the preventative maintenance of a
cell site. However, if maintenance teams are responsible for a number of cell
sites, maintenance schedules for the different sites should be staggered so that
labour time is more effectively and efficiently managed. Table 2-1 shows an
example of a maintenance schedule for six cell sites where the periodic
routines are distributed evenly throughout a one year period.
Table 2-1
Maintenance schedule example
Cell
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sept
Oct
Nov
Dec
#1
1 yr
mo
mo
qtr
mo
mo
6 mo
mo
mo
qtr
mo
mo
#2
mo
mo
1 yr
mo
mo
qtr
mo
mo
6 mo
mo
mo
qtr
#3
mo
qtr
mo
mo
1 yr
mo
mo
qtr
mo
mo
6 mo
mo
#4
6 mo
mo
mo
qtr
mo
mo
1 yr
mo
mo
qtr
mo
mo
#5
mo
mo
6 mo
mo
mo
qtr
mo
mo
1 yr
mo
mo
qtr
#6
mo
qtr
mo
mo
6 mo
mo
mo
qtr
mo
mo
1 yr
mo
A cell site maintenance reference chart and preventive maintenance check
lists are provided in the following pages.
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2-10
Periodic maintenance
DualMode 800 Enclosure Maintenance Reference Chart
Every
Visit
Monthly Quarterly
SemiAnnual
Annual
Equipment Bays and Interface Module
Fans/Breakers/Fuses
•
HSMO Tests
Oscillator Power Level (Ch. 5)
•
Oscillator Frequency (Ch. 5)
•
TRU Receive Tests - Analog
Receive Sensitivity (Ch. 11)
•
Receive Audio Level (Ch. 11)
•
RSSI Curve (Ch. 11)
•
SAT Detect (Ch.11)
•
ST Detect (Ch.11)
•
Audio Loopback (Ch.11)
•
TRU Transmit Tests - Analog
PA Carrier Power Level (Ch.11)
•
Transceiver Carrier Level Test (Ch.11)
•
Transmit Carrier Frequency (Ch.11)
•
Modulation Limiting (Ch.11)
•
Transmit Audio Deviation (Ch.11)
•
Residual Modulation (Ch.11)
•
Wideband Modulation (Ch.11)
•
SAT Frequency Deviation (Ch.11)
•
TRU Audio Alignment Tests - Analog
Voice Forward Line Level (Ch.11)
•
Voice Reverse Line Level (Ch.11)
•
•
PA Power Output (Ch.11)
- continued -
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Comments
DualMode 800 Enclosure Maintenance Reference Chart
Every
Visit
Monthly Quarterly
SemiAnnual
Annual
2-11
Comments
TRU Digital Tests - TDMA
TDMA Modulation Accuracy (Ch.11)
Troubleshooting
Bit Error Rate (BER) (Ch.11)
Troubleshooting
ACU Tests
Alarm Control Unit (Ch.8)
•
Transmit Path Tests
Insertion Loss (Ch.11)
•
RMC Tests
Insertion Loss (Ch.7)
Troubleshooting
Transmission Facilities
Copper Audio Link (voice, T1)
•
Power
Fuses, Breakers
•
Battery & Rectifiers
•
Voltage and polarity on the bays
•
Commissioning
Inside Grounding
Bay Bonding
•
Cabling and Connections
•
Principle Ground Bar
•
Transmission Line Entrance
•
Outside Grounding
Tower and Associated Structures
•
Building Sheath, Fences and other
Equipment
•
- continued -
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DualMode 800 Enclosure
Maintenance Manual
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2-12
Periodic maintenance
Every
Visit
Monthly Quarterly
SemiAnnual
Annual
Antennas and Tower
Structure
•
Tower Lighting
•
Grounding
•
Paint
•
Feed
•
Antennas
•
Pressurized Transmission Lines
•
Site Performance
Fringe Coverage
•
Handoff Checks
•
Antenna Sweep
•
Housekeeping
Heating/Air Conditioning
•
Dust Control
•
Statutory Requirements
•
Site Licenses
•
Trash and Loose Articles
•
Site Grounds Keeping
•
Building Service
•
Security
•
Manuals and Records
•
- End -
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Comments
DualMode 800 Enclosure Every Visit Checklist
2-13
DualMode 800 Enclosure Every Visit Checklist
Date:____________________________
Performed by:___________________________
Equipmene bays
Check all breakers for correct position, that is, ON/OFF on all power equipment
Check fuse indicators; replace fuses if necessary
Check receive multicoupler fuse
Verify that all cooling fans are working in each bay
Enclosure and site
Check that no high or low temperature alarm is present
Check that the interior lights work
Verify automated security system by tripping alarm (reset after test)
Check air filters on air exchange/conditioner equipment
Verify the presence of a fire extinguisher & check expiry date
10
Check for leaks in the shields
11
Check the condition around the enclosure
12
Check for deterioration of paint on walls
13
Check cable access ways through the walls for deterioration
14
Inspect grounding system
15
Perform general housekeeping duties to remove dust, dirt and trash
16
Complete manuals, site logs, and records
17
Turn tower lights on and verify that all lights are working
18
Inspect antenna ground for corrosion
19
Security checks on fences, windows, doors, tower guy anchors
20
Check that site gate locks are secure
21
Clean up any debris around the site area
22
Check that there are no overhead lines down
Pressurized transmission lines to antenna
23
Check the nitrogen tank pressure, manifold, and the dehydrator
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Periodic maintenance
DualMode 800 Enclosure MONTHLY Checklist
Date:____________________________
Performed by:___________________________
Perform the EVERY VISIT routine checks
Power - Battery
Check the battery voltages and note any discrepancies.
Check terminals, connectors for signs of moisture or corrosion
Power - BCM
Check that the BCM output voltage is within specification
Housekeeping
Mop the floors at least once a month to keep dust levels to a minimum
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DualMode 800 Enclosure QUARTERLY Checklist
2-15
DualMode 800 Enclosure QUARTERLY Checklist
Date:____________________________
Performed by:___________________________
Perform the EVERY VISIT routine checks
Perform the MONTHLY routine checks
Equipment bay
Voltage and Polarity checks at Main Power Terminals
Step 6 of Voltage Checks Test (See Chapter 4)
Transmission facilities
Perform noise and level checks on T-1 transmission facilities (optional)
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Periodic maintenance
DualMode 800 Enclosure SEMI-ANNUAL Checklist
Date:____________________________
Performed by:___________________________
Perform the EVERY VISIT routine checks
Perform the MONTHLY routine checks
Perform QUARTERLY routine checks
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DualMode 800 Enclosure ANNUAL Checklist
Date:____________________________
Performed by:___________________________
Perform the EVERY VISIT routine checks
Perform the MONTHLY routine checks
Perform QUARTERLY routine checks
Perform SEMI-ANNUAL routine checks
Equipment bays
Test TRU and MCPA for power output
TRU Output Power Test
Test the ACU alarm input points
Alarm Control Unit Tests
Check the Insertion Loss of the Transmit Path
Insertion Loss
Check HSMO Frequency on mixed or all dual mode sites
Oscillator Frequency Test
Power - Rectifiers
Test the alarm/cut out sections on the rectifiers by adjusting the high and low voltage
Inside grounding
10
Check that each bay line-up is grounded to the principle ground bar with #2 AWG
insulated wire and individual drops from this cable to each bay
11
Verify all inside ground connections lead back to the principle ground bar.
12
Check all connections, ensure new or changed equipment is properly grounded
13
Check that the transmission line to the antennas is lightning protected where it comes
into the building.
14
Check the condition of the grounding connections for corrosion
Outside grounding
15
Using binoculars or a spotting scope, verify that the air lightning rod and antennas are
still attached to the tower and grounding system
16
Verify that the antenna feed cables are grounded at both ends
17
Verify that the cables and clamps attaching the tower and waveguide bridge to the
grounding system are secure
- continued -
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Periodic maintenance
18
Verify that the cables and clamps connecting the guy wires to the grounding system are
secure
19
Verify that transmission cables are grounded at both the top and bottom of the tower,
and the building entrance
20
Buildings with metal walls, roof or base, all metal parts are grounded
21
Site fence, fuel tank or other metal structures are grounded
22
Check that grounding cables and clamps are secure
Antennas and tower
23
Check the tower base for cracks, concrete break up and upheaval
24
Check all guy anchors for cracks or upheaval
25
Check guy tension and attachment
26
Check fasteners for security
27
Check all components for rust
28
Check for flaking paint (often a sign of over-stress)
29
Check the over-all condition of the paint; re-paint if necessary
30
Check that the transmission line is adequately supported and protected between the cell
site building and the antenna tower
31
When tower is climbed, check grounding on the higher parts
32
When tower is climbed, check the tower lights
33
When tower is climbed, perform structural inspection of antenna:
• Check for correct orientation and tilt
• Check for cracks, dents, burns
• Check for fasteners, attachment and security
• Check for transmission line and ground attachment security
• Check for audible gas leakage in pressurized system
Site performance
34
Confirm coverage by making calls from the fringe of the site coverage area
35
Confirm handoffs by driving across the cell boundaries with a call established
36
Perform an antenna sweep test
- continued -
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Housekeeping - Environment
37
Check for insects, mouse and birds nest in intake and exhaust systems
38
Inspect temperature in all equipment bays
Licenses and other requirements
39
If the building uses AC mains service from overhead poles, take a look at the drop and
service entrance for obvious damaged insulation
40
Ensure the necessary licenses are maintained
- End -
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Periodic maintenance
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3-1
Test equipment and precautions
The DualMode 800 Enclosure is basically operated by the Digital Multiplex
Switch - Mobile Telephone Exchange (DMS-MTX*). It can also be operated
by a service personnel at the cell site through an interface terminal to perform
some operational functions and tests. This manual provides information on
how to operate the cell site equipment and perform maintenance tasks and
operational tests at the cell site. However, some of the tests may involve
activities at the MTX switch. For details of the MTX activities, refer to the
appropriate DMS-MTX manuals.
To operate and test cell site equipment, an interface terminal and some other
test equipment are required. This chapter provides a list of recommended test
equipment and precautions to be aware of when performing any tasks at the
cell site.
Test equipment
It is assumed that the operator is familiar with the test equipment used in the
test procedures. The following test equipment is recommended for
performing the required tests. Any functionally equivalent unit may be used
in its place. Double shielded coaxial cables are recommended for use between
test equipment and the equipment being tested.
Note: Ensure test equipment is calibrated before performing any tests.
1. Communications Monitor (examples as listed below):
— IFR 1600, 1900
— Marconi 2955A e/w C-Message Filter option #54499-043S and
OCXO option #52955-900A
— Motorola 2600
— Hewlett Packard 8921, 8935
2. Interface Terminal: VT100 Video Display Terminal or equivalent (lap-top
PC with communications software) e/w null modem cable
— Set up the parameters of the terminal as follows:
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Test equipment and precautions
– 9600 baud
– 8 data bits
– 1 stop bit
– No parity
– 80 columns
– Auto wraparound
– ANSI
– VT100 emulation
— Cable for connecting the Transmit Receive Unit (RJ45 Teledapt
connector on the front panel of the TRU) to the Interface Terminal.
Table 1-1 shows the pin-outs for different types of terminal
connectors.
Table 3-1
DRU to Interface Terminal connection
DRU
Interface Terminal
Function
TRU front panel
RS-232 port
pin number
25 pin
D-connector
pin number
9 pin
D-connector
pin number
8 pin Macintosh
connector
pin number
TX from DRU
RX to DRU
Ground
3. HP 3551A Transmission Test Set
4. Spectrum Analyzer 0 to 2 GHz, 70 dB dynamic range
5. Two 1.5 meter N-male to N-male RF Cables
6. Two 1.5 meter N-male to BNC-male RF Cables
7. Two 1.5 meter BNC-male to BNC-male RF cables
8. Narda 370BNN 50 ohm Terminations
9. Bird 8325 Coaxial Attenuator, 500 Watts, 30 dB,
10. Bird Thruline Wattmeter e/w 5, 50 and 250 Watt Elements
11. HP336 power meter
HP436A power meter
12. Bird 4275 Adjustable Radio Frequency Sampler
13. Fluke 8050A Digital Multimeter
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Precautions
3-3
14. Directional Compass
15. Binoculars or Spotting Telescope
16. Frequency counter: 1 Hz resolution and 0.025 ppm reference
Note: Frequency counter should be a factor of 10 more stable than the
oscillator being measured, for example, Hewlett Packard 53181A with
option 12 Frequency Counter.
17. PC or laptop with the MCPA software package and a null modem cable
(see the MCPA section in Chapter 1, Equipment operation, for details)
Precautions
Equipment warm-up
Do not perform tests immediately after the installation of any equipment. The
TRU, the MCPA, the ICRM and the test equipment should be powered up for
at least half an hour before the tests. Inaccurate measurements may result if
the warm-up period is less than 30 minutes.
Test equipment
Proper setup of the test equipment is critical in obtaining proper test results.
Consistency of setup and techniques from one person to another is essential
for obtaining proper system operation. Calibrate all test equipment before
use.
CAUTION
Equipment damage
Make sure that the test equipment maximum allowable input
levels are not exceeded. Add an attenuator to reduce the power
if necessary.
Rule of thumb—subtracting 3 dB halves the power level:
• +45.0 dBm is approximately 32 watts
•
+33.0 dBm is approximately 2 watts
•
+30.0 dBm is approximately 1 watt
•
+27.0 dBm is approximately 1/2 watt
•
0 dBm is approximately 0.001 watt (1 milliwatt)
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Maintenance Manual
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3-4
Test equipment and precautions
RF radiation hazard
Radio Frequency (RF) radiation is hazardous to anyone working in the cell site.
All RF cables should be connected properly and all unused RF ports should be
terminated with an appropriate terminator.
CAUTION
RF radiation hazard
Do NOT disconnect any RF cables when transmitters are on.
Electrostatic Discharge (ESD) control
This section provides general guidelines and precautions for handling,
transporting and storing components and printed circuit wiring boards that are
susceptible to permanent damage when subjected to electrostatic discharge
(ESD).
ESD sensitive equipment
Various electrical and electronic components are vulnerable to electrostatic
discharge (ESD). These include:
• discrete components
•
hybrid devices
•
Integrated Circuits (ICs)
•
boards assembled with these devices
Identification
Manufacturers vary in their methods of identifying static-sensitive equipment.
They may apply stickers or mark components with various colors, but many do
not indicate that their products are sensitive. Examples of identification are:
• circuit boards with ESD-sensitive devices have a red edge
•
hybrids containing Metal-Oxide Semiconductors (MOS) devices are red,
with the letters MOS on the back. Non-sensitive hybrids are white.
•
pull-handles on circuit packs containing sensitive devices may have the
letters MOS and the assembly part number printed in red
•
assembly drawings may have manufacturing notes describing the circuits
as ESD-sensitive
CAUTION
Equipment damage
When in doubt, any circuit board containing microelectronic
components must be assumed to be vulnerable.
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Precautions
3-5
Static control materials and devices
Use conductive bags and containers to store and transport circuit boards or
components. There are three common types of conductive bags: Velostat,
Tyvek and Pink Polyethylene.
Note: Pink Polyethylene is not recommended for ESD control.
CAUTION
Electric shock hazard
Metalized or carbon bags are conductive and therefore must
not contact live electrical circuits, or they may cause shorting,
sparking, and shock hazards to personnel.
Static-free work stations
Static-sensitive devices must be removed from packages only at a static-free
work area. The minimum equipment for a static-free work station is:
• conductive bench mat
•
operator's conductive wrist strap
Ideally however, locations should be equipped as follows when necessary:
• wrist strap
•
shoe grounding straps
•
ionized air blower (where required)
•
ground cord
•
floor mats
•
table mats
Where protective measures have not been installed, a suitable alternative
would be the use of a Portable Field Service Grounding Kit (3M part number
8012). This consists of a portable mat and wrist strap. The mat has pockets to
hold circuit boards.
Handling procedures
Degradation may occur at any time during the handling of electrostaticdischarge-sensitive devices and components. Boards or components should
never come in contact with clothing, because normal grounding cannot
dissipate the static charges on fabrics.
Before handling static-sensitive equipment, personnel must discharge
themselves of any static charge. The most effective method is the use of a
grounded wrist strap combined with correctly installed ground static control
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3-6
Test equipment and precautions
mats at all work locations. The wrist strap must be permanently attached to
the frame on the basis of one between two frames. Alternatively the straps
may be connected on an as-required basis to the battery return (Ground) jack,
where it is provided.
Handling
Electrostatic-discharge-sensitive devices must be handled only in static-free
locations. These locations must be equipped with grounded table and floor
mats and grounded wrist straps. Also a reasonable relative humidity (RH)
level must be maintained, if economically feasible, of between 20% and 80%
non-condensing. In places where humidification is not practical, the other
static control measures must be carefully observed.
Electrostatic-discharge-sensitive equipment must be handled only after
personnel have grounded themselves via wrist straps, or shoe straps and mats.
No electrostatic-discharge-sensitive device should be removed from its
protective package, except in a static-free location. The recommended
packaging is a form of Faraday cage that will protect the contents against any
charge present under normal conditions. Damaged packaging must be
replaced at once.
All common plastics and other prime generators (for example, nylon carpet,
plastic mats) must be prohibited in the electrostatic-discharge-free area.
Use only static-shielding packing material.
Transporting
A circuit pack must be placed into an anti-static shielding bag before being
removed from the work location and must remain in the bag until it arrives at
a static-free repair/test center.
CAUTION
Equipment damage
At no time must an unprotected circuit board come in contact
with clothing, plastics, or ungrounded personnel.
Where handles or finger holes are provided on circuit packs they must be used
to remove and replace the boards, and care taken to avoid contact with the
connectors and components.
Storage
Improper storage can cause failures in ESD-sensitive components. The
guidelines for environmental factors (temperature, moisture, air pollutants)
are as important during storage as they are for operating. Wider variations of
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Precautions
3-7
temperature may be allowable, depending on the type of device. In general,
low temperatures do not damage inactive equipment provided that the device
is slowly raised to normal room temperature before use.
Electrostatic discharge damage to unprotected sensitive devices may occur at
any time. Therefore it is important to keep ESD-sensitive circuit boards and
components in proper protective packages during storage. Discard suspect
bags and use new ones. Whenever possible, units requiring protection should
be identified on the protective packing.
Note: A circuit board in a static shielding bag may be shipped or stored in
a cardboard carton, but the carton must not enter a static-free area such as
a bench top or repair zone.
References
For more information on ESD and its control, refer to the following documents:
• Test Methods for Static Control Products (Huntsman & Yenni, 3M
Company)
•
Protection and Handling of ESD-Sensitive Circuit Packs (Bell Canada,
BCP069-8000-501)
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Test equipment and precautions
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4-1
Power-up procedure
Overview
Power-up procedures are used to inspect that the power cabling is correct and
to verify voltage checks.
Complete the power-up procedure before any equipment is plugged into the
equipment shelves.
Perform the procedure whenever a shelf or a unit such as the Alarm Control
Unit (ACU), the DualMode Cell Site Monitor (DCSM), or the High Stability
Master Oscillator (HSMO) is either removed or replaced. If the voltage or
polarity of the DC power is incorrect, equipment damage may result.
DC power inspection
An orderly installation of DC power is required at the enclosure to ensure
ease of expansion as traffic increases.
Step
Action
Observation
Verify that the DC power cables from the
breaker panel on the power bay to the
equipment bays have been run in an orderly
fashion and are secured to the runway.
Verify that the lugs have been installed
correctly and, if terminated on aluminum
busbars, have been treated with anti-oxidant.
Verify that the minimum bending radius has
not been exceeded on the power cables (see
Table 4-1).
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Power-up procedure
Step
Action
Observation
Verify that the breaker positions on the power
bay have been labeled and are cabled as
indicated on the labels.
Verify that the equipment bays are bonded to
the principle ground bar line-up feeder with a
#6 AWG jumper.
Note: See Tables 5-12 to 5-4 for the RIP
breaker panel assignments.
Table 4-1
Minimum bending radii of power cables
Wire Size
Inches
Millimeters
Wire Sizes
Inches
Millimeters
14 AWG
11/16
17.5
3/0 AWG
3 3/16
80.5
12 AWG
3/4
19.6
4/0 AWG
3 7/16
87.6
10 AWG
15/16
23.1
300 MCM
4 1/8
104.6
8 AWG
1 3/16
31.0
350 MCM
4 3/8
111.5
6 AWG
1 1/2
39.6
400 MCM
4 5/8
117.3
4 AWG
1 3/4
45.7
500 MCM
5 1/16
128.3
2 AWG
2 1/8
53.3
600 MCM
5 9/16
142.2
1 AWG
2 1/2
63.0
700 MCM
5 15/16
151.1
1/0 AWG
2 5/8
68.0
750 MCM
6 1/8
155.4
2/0 AWG
2 7/8
73.9
800 MCM
6 5/16
160.0
Voltage checks
This entire procedure is used for installation and commissioning only.
Figure 5-2 shows the DC breaker assignments on the RIPs. The breakers and
the common ground bar distribute the power/grounding to the individual
shelves through cables that exit out connectors in each side of the RIP. The
cables are then routed down each side of the frame.
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10A TRU 9B
10A TRU 8B
10A TRU 7B
Not used
—
Not used
—
Not used
—
Not used
5A
IM Light
5A
Bay 2 Light
10A TRU 6B
10A TRU 5B
10A TRU 4B
80A MCPA 2-2
Not used
—
Not used
5A
LVD 1A
20A TCU 1A
20A TCU 1B
5A
LVD 1B
—
Not used
—
Not used
—
Not used
5A
Bay 1 Light
5A
CSU B
20A ICRM B
10A TRU 3B
10A TRU 2B
10A TRU 1B
80A MCPA 1-2
4-3
80A MCPA 3-2
—
—
Voltage checks
ACU B
LVD 2B
Not used
Table 4-2
RIP1 circuit breaker assignments and ratings
5A
5A
—
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
ACU BIAS
20A TCU 2B
Not used
5A
20A TCU 2A
—
HSMO B
LVD 2A
CSU A
5A
5A
5A
ERMC B
Not used
20A ICRM A
5A
—
10A TRU 3A
Bay 3 Light
Not used
10A TRU 2A
5A
—
10A TRU 1A
Not used
Not used
80A MCPA 1-1
—
—
Table 4-3
RIP2 circuit breaker assignments and ratings
LVD 3B
Not used
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
5A
—
20A TCU 3B
Not used
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
20A TCU 3A
—
LVD 3A
Not used
5A
—
Not used
10A TRU 6A
—
10A TRU 5A
ERMC A
10A TRU 4A
5A
80A MCPA 2-1
HSMO A
MTX08
5A
Table 4-4
RIP3 circuit breaker assignments and ratings
10A DCSM
ACU BIAS
Observation
Maintenance Manual
Note: All breakers are rated at a potential of 65 Vdc.
5A
20A ACU A
10A TRU 9A
Action
DualMode 800 Enclosure
Turn OFF the breakers on the RIP panel and to
the cell site equipment.
Wireless Solutions
Unplug all the TRUs and the MCPA modules
from their respective shelves.
10A TRU 8A
10A TRU 7A
Step
80A MCPA 3-1
4-4
Power-up procedure
Step
Action
Observation
Disconnect the power cables from the ACU,
RMC, HSMO, DCSM, DRUM, ICRM, and TRU
shelves.
Caution: Arrange these cables so there is
no chance of them shorting out on anything.
Measure the resistance to ground on the
following power plug pins:
CE Frame
Pin 4
ACU
Pin 5
ACU and RMC
Pin 6
ACU, RMC, DCSM, HSMO and
DRUM
TB1-5 ICRM
TB1-7 ICRM
RF Frame
Pin 3
TRU shelves
Pins 2,3 MCPA modules
Less than 0.5 Ohms
Turn ON the mains breakers assigned to the
cell site equipment and the RIP breakers.
Measure and record the Voltage and Polarity of
the power terminals with respect to the DC
Return bar at the top of each frame.(CE and
RF)
Turn ON the breakers on the breaker RIP panel
Measure the voltage on the following power
plug pins:
CE Frame
Pin 1
ACU (+Bias)
Pin 2
ACU, HSMO, RMC, DCSM, and
DRUM (B Power),
TB1-1 ICRM (B Power)
Pin 3
ACU, HSMO, RMC, DCSM, and
DRUM (A Power)
TB1-3 ICRM (A Power)
RF Frame
Pin 2
Transceiver shelves
Pins 1,4 MCPA modules
Turn OFF the breakers on the RIP panel and to
the cell site equipment.
10
If the checks pass then reconnect the cables to
all the units and plug the TRUs into their
shelves. Turn the power back ON.
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+26.5 to 29 Vdc
+26.5 to 29 Vdc
5-1
Master Oscillator tests
Overview
Cell site transceivers require a stable reference in order to accurately produce
transmit carrier frequencies and to select receive frequencies.
The master oscillator produces this stable reference for the TRUs to ensure
that all channels operate on their assigned frequencies and do not interfere
with other channels.
The TRU shelf associated with the master oscillator output under test will be
out-of-service for the duration of the tests. It is good practice to use an unused
port for the frequency test if available.
Oscillator frequency specifications
High Stability Master Oscillator (HSMO): 4.8 MHz ± 1.2 Hz
The HSMO for digital operation must be tested using a Rubidium counter
reference or equivalent which provides a stable reference of <0.025 ppm.
The HSMO can also be tested using TRU carrier frequency measured with the
communications monitor. This requires measuring the frequency error of the
carrier in the expanded spectrum. The offset of 0.25 ppm (1.2 Hz/4.8 MHz)
translates to ±220 Hz.
CAUTION
The HSMO is adjusted at the factory for frequency accuracy. If
the frequency test fails, do NOT adjust the unit, it must be
replaced with a new serviceable one.
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5-2
Master Oscillator tests
Oscillator power level test
See Figure 5-1 for set-up.
Step
Action
Connect the communications monitor to the
output port under test on the back of the
master oscillator. Select the spectrum
analyzer function and set to 4.8MHz.
Measure the output of the master oscillator
and record on the test form.
Observation
-1 dBm ±3 dB
Note: The remaining 15 ports should be terminated with 50-ohm
termination for a correct power reading.
Reference oscillator tests
See Figure 5-1 for set-up.
Step
Action
Using a frequency counter, measure the
oscillator frequency at outputs 1 to 16 at the
rear of the shelf.
Observation
HSMO output frequency: 4.8 MHz ±1.2 Hz
Note 1: The frequency counter should provide a resolution of 1 Hz and a
stable reference of < 0.025 ppm.
Note 2: The HSMO is adjusted at the factory for frequency accuracy. If
the frequency test fails, do not adjust the unit but replace with a new unit.
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Reference oscillator tests
5-3
Figure 5-1
Oscillator power level and frequency test setup
Diversity Receive
Receive Multicoupler
Other TRU
Shelves
1:8
Splitter
Main
Transmit / Receive
Preselect
Filter
LNA
Duplexer
RX Bandpass
Filter
Receive Multicoupler
Other TRU
Shelves
1:8
Splitter
Preselect
Filter
LNA
TX Bandpass
Filter
Sniffer
TRU Shelf
TRU 1
TRU 2
MCPA Shelf
4:1 Combiner
1:8 Splitters
•••• • •
•••• • •
Tx
Combiner
MCPAs
TRU 7
VT100
TRU 8
Voice
To
MTX
Inputs
Outputs
Data
Alarm
Control Unit
High Stability
MasterOscillator
AUTO
GEN
65W
IN MAX
SGL
STEP
RCVR
DUPLEX
FM/AM
1600S
POWER
FM /A M
DPLX
GO
STOP
SCOPE
ANLZ
PRINT
SCRN
SETUP
SHIFT
MTRS
HOLD
SCRN
STORE
RCL
MEMORY
AUX
MIC/ACC
EXT MOD
A P P L I
O END
SINAD
km
Enter
CE
DEL
EDIT
SQLCH
AUDIO
DEMOD
OUT
OUT
VΩ
VOL
DMM
COM
AMP
BER
F1
F2
F3
F4
F5
F6
IN/OUT
IN
IN
SELECT
AF
GEN
1 6 0 0 S
DATASCROLL
MODE
65W
OUT MAX
INTENSIT
FIELD
DATAENTRY
RF
ANTENNA
TESTCONTROL
Integrated
Cellular
Remote
Module
(ICRM)
Alarm
Other TRU
Shelves
Data
1KVDC/500V
AC MAX
2 AMPS
MAX
^ v
< >
SCOPE
T/R
200W
MAX
IN
200 VDC
MAX
IN/OUT
Communications Monitor (IFR 1600)
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Maintenance Manual
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5-4
Master Oscillator tests
Oscillator frequency test procedure using TRUs
This test is to be used to test frequency on TRUs:
1. Select and offline a TRU to use for the test.
2. Connect the interface terminal to the RS-232 port on the front panel of the
TRU under test. See Chapter 11, DualMode Radio Unit Tests, in this
manual.
3. Set up TRU for test (refer to Chapter 11 in this manual).
HSMO frequency test — transceiver carrier method
This test ensures that the HSMO is operating at the assigned frequency of 4.8
MHz ±1.2 Hz. See Figure 5-2 for set-up.
Step
Action
Observation
Ensure that the communication monitor can
listen to the TRU under test by either the
sniffer or through an antenna.
Set the communication monitor to monitor
the forward channel under test.
Use the frequency meter/frequency error
meter to measure the offset.
Record the assigned frequency (in MHz) and
the frequency error (in Hz) on the test forms.
If the results are questionable then repeat for
at least one more transceiver.
±220 Hz of the assigned frequency
Note: The measured frequency deviation from the assigned channel may not
fall within the ±0.25 PPM specification. This is due to the following:
• IFR accuracy at ±0.20 PPM translates to ±175 Hz uncertainty
•
a +100 Hz offset to ensure proper baseband operation
These translate into a slightly different deviation measured with the IFR1600:
• -75 to +275 Hz
good
411-2051-500
•
-165 to +365 Hz
questionable
•
beyond above
swap
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Oscillator frequency test procedure using TRUs 5-5
Figure 5-2
Oscillator frequency test setup — transceiver carrier method
Diversity Receive
Main
Transmit / Receive
Receive Multicoupler
Other TRU
Shelves
1:8
Splitter
Preselect
Filter
LNA
Duplexer
RX Bandpass
Filter
Receive Multicoupler
Other TRU
Shelves
1:8
Splitter
Preselect
Filter
LNA
TX Bandpass
Filter
Sniffer
TRU Shelf
TRU 1
TRU 2
MCPA Shelf
5:1 Combiner
1:8 Splitters
•••• • •
•••• • •
Tx
Combiner
MCPAs
TRU 7
VT100
TRU 8
Voice
To
MTX
Inputs
Outputs
Data
Alarm
Control Unit
High Stability
MasterOscillator
AUTO
GEN
65W
IN MAX
SGL
STEP
RCVR
DUPLEX
FM/AM
1600S
POWER
FM /A M
DPLX
GO
AF
GEN
STOP
PRINT
SCRN
SETUP
SHIFT
MTRS
HOLD
SCRN
STORE
RCL
MEMORY
AUX
MIC/ACC EXT MOD
A P P L I
O END
SINAD
km
Enter
CE
DEL
EDIT
SQLCH
AUDIO
DEMOD
OUT
OUT
VΩ
VOL
DMM
COM
AMP
BER
F1
F2
F3
F4
F5
F6
IN/OUT
IN
IN
SELECT
SCOPE
ANLZ
1 6 0 0 S
DATASCROLL
MODE
65W
OUT MAX
INTENSIT
FIELD
DATAENTRY
RF
ANTENNA
TESTCONTROL
Integrated
Cellular
Remote
Module
(ICRM)
Alarm
Other TRU
Shelves
Data
1KVDC/500V
AC MAX
2 AMPS
MAX
^ v
< >
SCOPE
T/R
200W
MAX
IN
200 VDC
MAX
IN/OUT
Communications Monitor (IFR 1600)
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Master Oscillator tests
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6-1
Antenna and transmission line tests
CAUTION
RF Radiation Hazard
All transceiver transmitters must be turned off before
disconnecting or connecting transmit cables to avoid RF
induced injuries.
Antenna direct current continuity
These tests are required for new antennas or antennas suspected of faulty
operation. The tests are service affecting.
The most important consideration of antenna direct current continuity is not
so much the antenna but the transmission line shield. Of course, the antenna
must be electrically connected to the coaxial transmission line, but most
important, the transmission line shield must be grounded for lightning
protection.
The other DC tests serve as more of a record of the resistance of the shield
and center conductor. They may indicate future grounding problems or
identify a change in the antenna dipole condition (open, now shorted or in the
opposite way).
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Antenna and transmission line tests
Step
Action
Observation
Visually inspect the bonding of the
transmission line to the mast ground riser at
both the top and bottom of the tower.
The transmission line must be bonded at
both the top and bottom. A set of binoculars
or a spotting telescope may be required to
verify the upper bonding.
Inside the building, measure the DC
resistance of the outer conductor to the
principle ground.
Less than or equal to 0.5 Ω
Measure and record the DC resistance of the
center conductor (pin)to the outer
conductor(shield).
Also check the alignment of the center pin of
the heliax connector. If necessary re-align
the centre pin so that the female pin in the
antenna jumper cable connector is not
damaged.
Repair or replace heliax, connectors, ground
systems as required.
Antenna return loss
The antenna return loss is measured to verify that the antenna is properly
matched to the system and to identify open connectors.
Antenna return loss test
CAUTION
This test is service affecting when the antenna is disconnected.
This test uses the signal generator, the spectrum analyzer and the VSWR
bridge to sweep the antenna for return loss at both the receive (824 to 849
MHz) and transmit (869 to 894 MHz) frequency bands. Figure 6-1 shows the
set up for the test.
Test Equipment: RF Signal Generator
Spectrum Analyzer
VSWR Bridge
If any of the test equipment is not available, a Thruline Wattmeter may be
used (refer to the Thruline Wattmeter Method section).
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Antenna return loss
6-3
Figure 6-1
Antenna return loss block diagram
Step
Action
Observation
Connect the signal generator, the spectrum
analyzer and a 50 ohm load to the VSWR
bridge.
Set the signal generator output level to 0
dBm.
With the device under test (DUT) VSWR
bridge port connected to an open, adjust the
display on the spectrum analyzer to the top
of the screen.
Connect a 50 ohm termination to the open
port on the VSWR bridge and step the
generator through the receive and transmit
band to verify the test set-up for return loss.
Remove the termination from the VSWR
bridge, connect the antenna jumper cable to
the open port and again step the generator
across the transmit and receive bands.
Record the minimum return loss of the
antenna and transmission line in the system.
See Figure 6-1.
Return loss should be greater than 35 dB
over the bands.
Return loss:824 to 849 MHz RX
869 to 894 MHz TX
Greater than or equal to
14.5 dB + (2 x TX line loss)
Repeat the test for each antenna installed for
the cell site.
If the test fails, check the antenna matching,
cables and connectors.
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6-4
Antenna and transmission line tests
Thruline wattmeter method (Antenna return loss)
This is a service affecting test using a Thruline Wattmeter. It can be used with
transmit antennas only. Ensure that all transmitters are OFF before
inserting the Thruline in the transmission path.
Step
Action
Observation
Connect the Thruline between the duplexer
and the antenna.
Measure the forward and reverse power
using the appropriate element with one or
more transmitters turned on.
Reflected power less than 4% of forward
power
Antenna sweep
This is a service affecting test. Ensure that all transmitters are OFF before
disconnecting the antenna cable.
Step
Action
Observation
Set up and calibrate a network analyzer
(HP8753C or equivalent) to sweep 823 to
895 MHz.
Notify the Control Center to OFFLINE the
cell site.
Disconnect the antenna jumper cable.
(Located at the duplexer for the tx/rx antenna
or at the RMC for the diversity receive
antenna.)
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Antenna sweep
Step
6-5
Action
Observation
Perform a return loss sweep on the Network
Analyzer. Note the worst frequencies by
placing 2 markers each on the transmit and
receive frequencies. then print a hard copy of
the upper left quadrant.
Measured return loss of the antenna can be
calculated as:
RL (ant) = -14 dB - 2 times the antenna
cable loss
or:
Compare you results with that of the RF Path
calculated return loss of the cell site logbook
(check the RF PAth Analysis sheet).
If the results are bad compared to the log
book values connect the test cable directly to
the main transmission line and resweep.
It is possible to have a bad jumper. If the
result s are still bad then the problem could
be either with the transmission line or the
antenna.
Do a TDR sweep of the antenna. Print a hard
copy of the lower left quadrant.
Do a SWR sweep of the antenna. Print a
hardcopy of the upper quadrant. The result
should not be higher than 1.5:1
Do a Smith Chart of the antenna. Print a
hard copy of the lower right quadrant. The
results must be close to 50 ohms (±50
ohms).
Reconnect all the jumpers to their proper
location then inform the Control Center to
RTS the Cell Site.
If the transmit antenna is bad and the receive
antenna is good on the transmit band,
restore service by using the receive antenna
until the transmit antenna is repaired.
- End -
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Antenna and transmission line tests
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7-1
Enhanced Receive Multicoupler (ERMC)
tests
ERMC description
The Enhanced Receive MultiCoupler (ERMC) modifies the receive RF signal
for the front-end of the TRU shelf transceivers. The ERMC provides
selectivity, signal gain and signal distribution so that the receive signal is
adequate for the transceiver front-end.
ERMC overall gain measurement test
This test is required for a cell site suspected of faulty operation. The test is
service affecting.
Step
Action
Observation
Notify the Control Center to OFFLINE the
cell site.
Disconnect the antenna feed cables from the
selectivity filter inputs.
Disconnect the cable from the ERMC splitter
port to be tested.
Using a 50-ohm cable, connect the
communications monitor Duplex Output port
to the selectivity filter input of the ERMC
(either A or B side). See Figure 7-1.
Using a 50-ohm cable, connect the
communications monitor T/R port to one of
the splitter ports corresponding to the A or B
path selected. See Figure 7-1.
- continued -
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7-2
Enhanced Receive Multicoupler (ERMC) tests
Step
Action
Observation
Set up the communications monitor to output
an RF signal less than -60 dBm sweeped
from 824 to 849 MHz.
Using the communication monitor in
spectrum analyzer mode sweep the RMC
and note any irregularities in the gain.
Repeat for all splitter ports and for both A
and B diversity paths.
Replace the antenna feed and splitter output
cables and then inform the Control Center to
RTS the Cell Site.
Gain measured may vary depending on cell
site requirements for RF sensitivity versus
IMD. See the RF Engineering Guidelines for
800 MHz Cellular Systems, 411-2131-007.
- End -
Note: If an irregularity in the ERMC gain exists, call Nortel Networks RF
Engineering Support for assistance.
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ERMC overall gain measurement test
7-3
Figure 7-1
RMC overall gain measurement test
RMC Input Preselect Filter A
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7-4
Enhanced Receive Multicoupler (ERMC) tests
ERMC gain adjustment
This section refers to the RF Engineering Guidelines for 800 MHz Cellular
Systems, 411-2131-007, specifically the Talk-in Talk-out (TITO) adjustment.
Gain setting are factory preset to 16 dB but specific cell site requirements
may differ. Refer to the 800 MHz ERMC Deployment Guide, 411-2131-940,
for more information on the ERMC.
Note: Use caution when attempting to adjust the ERMC variable
attenuator. Overall system performance may suffer seriously, therefore a
thorough understanding of the RF Engineering Guidelines should be
acquired.
CAUTION
Service affecting
This test is service affecting and will take two TRU Radios off
line. This test should be done when there is a problem; not as a
regular maintenance routine.
Talk-In/Talk-out (TITO) balance test
The main purpose of the Talk-In/Talk-Out (TITO) test is to ensure that the
ERMCs are tuned correctly. If they are not, the user could get noisy channels
usually due to co-channel interference, low RF levels, or both. This usually
happens to sites with large coverage where the multicoupler does not have
sufficient gain to balance to talk-in path.
This test is required when there is a problem with the receive path and the
ERMCs are suspected of faulty operation.
If the ERMCs are suspected to be faulty this test will verify if they actually
are. There are two tasks that are done at the same time with this test after a
call has been set-up.
1. You are monitoring a channel and RSSI (Receive Signal Strength
Indicator) from the mobile.
2. You are monitoring the same channel and RSSI at the cell site.
Figure 7-2 shows the call setup for a TITO balance test.
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Talk-In/Talk-out (TITO) balance test
7-5
Figure 7-2
Talk-In/Talk-out call setup
Cell site
Equipment
MTX
DMS
Mobile Monitoring
RSSI
In order to guarantee minimum noise and reflection, the mobile should be in
about the middle of the cell’s coverage area, away from any tall buildings or
shadow zones from hills or mountains.
TITO test procedure
Step
Action
Observation
At the MTX place an idle TRU in the off-line
state.
The TRU will be in the idle state.
Make a call from the mobile to a phone at the
switch and leave phone off hook.
Switch end will receive a call from the mobile
to setup a call for monitoring.
At the cell site test TRU, connect a terminal
and place in the debug mode. See Terminal
Interface Operation in Chapter 1.
When the call has been setup put the mobile
into monitor mode and take note of the RSSI
measurements.
Record the RSSI measurements at the
mobile.
Set the test TRU, to the same channel as the
one with the call on it from the mobile.
TRU will display same channel.
Set the TRU up to monitor the RSSI
measurements. See RSSI tests for set up in
Chapter 11 of this manual.
This turns on all antenna ports.
- continued -
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7-6
Enhanced Receive Multicoupler (ERMC) tests
Step
Action
Observation
Monitor and record 20 RSSI measurements
simultaneously at both the mobile and the
test TRU. The mobile should be driven
through a predetermined path to repeat the
test for other channels available.
Record and average the levels in the chart.
- End -
Note: If an imbalance exists, call Nortel Networks RF Engineering
Support for assistance in re-balancing the ERMC output.
Always ensure that the site is balanced for the worst case. The radio TX path
must be equal to or stronger than the Talk-In path. If there are significant
differences in the Talk-out (base TX) levels on different antennas, check for a
defective RF component such as an antenna, a cable, or a combiner.
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8-1
Alarm Control Unit (ACU) tests
Overview
The Alarm Control Unit (ACU) provides discrete alarm monitoring, reporting
and control functions at a cell site. The site ACU concentrates all alarm input
points at the cell site and updates the MTX of any status change over
redundant data links. The MTX can also poll for the condition of the ACU
and request current status information or change the status of any output
control contact. For a complete description of the ACU, refer to the
DualMode 800 Enclosure Functional Description, 411-2051-100.
Alarm Control Unit test setup
Connect a VT100 terminal (or equivalent) using a null modem cable to the
ACU local terminal connector.
Step
Action
Observation
Set up the terminal as per the requirements
to the right.
BAUD Rate:
Scroll:
Auto repeat:
ANSI
Auto Wrap:
Receiver Parity:
Parity:
Character Bits:
Interface:
Scroll Key:
Form Feed:
Control Characters:
Local Echo:
RTS-CTS Handshake:
8 Bits Tx:
TX 9600
RX 9600
smooth
on
off
ignore
disabled
8 bits
on
VT100
line feed
executed
off
off
space
- continued -
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8-2
Alarm Control Unit (ACU) tests
Step
Action
Observation
Press the RESET key on the ACU to activate
the Maintenance Screen on the terminal.
The ACU Maintenance Screen as per the
following diagram Figure 8-1 will appear.
Using the keyboard arrows, select the Input
and Monitor menu items on the screen.
Verify the remote alarms with respect to the
site alarm records.
See Chapter 1, Equipment operation, for a
description of all the menus.
Test all equipped alarm points on the ACU.
This can be done by performing action such
as turning DC breaker OFF, removing fuses,
opening doors.
Bold display - alarm ON
Normal display - alarm OFF
Apply +27 Vdc to each equipped alarm input
at the rear of the ACU. Verify that each alarm
indicates the correct status on the VT100
screen.
Bold display - alarm ON
Normal display - alarm OFF
Open and close each selected output and
verify its action by observing an open or
short on the rear output connector, J8.
- End -
Figure 8-1
ACU First maintenance screen
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Alarm Control Unit test setup 8-3
Figure 8-2 shows the pin assignments of a typical alarm connector.
Figure 8-2
Typical alarm connector (36-Pin)
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Alarm Control Unit (ACU) tests
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9-1
Performing tests using a DCSM
Introduction
The DualMode Cell Site Monitor (DCSM) can operate in either stand-alone
mode or directed mode. In stand-alone mode, the handset on the front panel is
used to conduct manual calls. In directed mode, the MTX assumes control of
the DCSM to perform a variety of non-obtrusive tests of the site. The MTX
directed tests on the CCH, VCH, and LCR can be invoked from the respective
level of the MAP position. Additionally from the CTT level VCH tests can be
initiated with the option of testing a number of Devices Under Test (DUT) in
sequence. The tests can also be set-up to be automatically run using the
scheduler feature of Table CTTSCHED.
By making a call to the DCSM in the stand-alone mode or performing tests at
the MTX in the directed mode, the Control Channel (CCH) and Voice
Channels (VCH) of a cell site can be verified to be operating correctly.
Stand-alone mode tests
In stand-alone mode the mobile unit in the DCSM functions in the same
manner as a subscriber mobile telephone in the cellular system. For this
reason, the mobile unit in the DCSM has to be activated in the same manner
as a subscriber mobile telephone. The cellular system will not recognize the
mobile unit or allow it to function unless the programming on the Numerical
Assignment Modules (NAM) is completed. Refer to Chapter 1, Cell site
operation, for the programming of the NAMs.
In stand-alone mode the DCSM acts as a subscriber mobile registered in the
partition. Once the mobile of the DCSM has acquired and locked onto a CCH
in the partition it can be used to make a call through test through the handset
of the mobile. Making a call verifies that the system is up and running.
Stand-alone ACCH/DCCH selection
When a partition is equipped with both an ACCH and a DCCH do the following:
1. select NAM 4 and enter the programming selection mode
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9-2
Performing tests using a DCSM
2. scroll to the ScnDCCH field
— if you want to verify the ACCH set ScnDCCH to 0 or
— if you want to verify the DCCH set ScnDCCH to 1
Note: In ScnDCCH mode you should set the field 1STDCCH to the
channel number of the DCCH you wish to perform the call through test
on. If you have a sectored site you must repeat the NAM programming for
each specific DCCH you wish to perform the stand-alone call through
test.
DCSM auto answer facilities
In both the directed or stand-alone modes the DCSM will automatically
answer all incoming calls. If the incoming call uses an analog call resource
(AVC), the DCSM will generate a 1004 Hz tone for five seconds on the
reverse path. The forward audio will then be looped to the reverse audio for
the remainder of the call. If the incoming uses a TDMA call resource (DTC),
the DCSM will automatically answer the incoming call, but will not generate
a tone, or loop the forward and reverse audio paths.
Nortel Networks recommends that the MRLT, MRHT, MRLP and MRLR
VCH tests be used for verifying the performance of analog voice channels.
Performing tests using the DCSM in the directed mode
The directed-mode tests using the DCSM can be further divided into two
categories:
• MTX trunk tests
•
Control channel tests
Control channel testing uses the DCSM to monitor the Overhead Message
Train (OMT) on the ACCH and the FBCCH and EBCCH sub channels on a
DCCH. A site control channel can also be tested for its power level in both the
forward and reverse direction.
MTX trunk tests use the DCSM mobile as a loop-around to measure various
indicators of the trunk path performance. Specifically the RF performance of
the DUT can be measured by advantageously using the parameters of Table
CTTPARMS.
Monitoring functions
With the MON ON command from the CTU MAP level, you may enable the
ICP to drive the periodic CCH audit order function. Command parameters
specify if a cell or a particular cell/sector is to be monitored. You must also
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Performing tests using the DCSM in the directed mode
9-3
specify if monitoring is to be performed for ACCHs, DCCHs, or both. In the
event that both CCH types are required to be monitored, the periodic audit
will proceed in a round robin fashion by first monitoring all the ACCHs
within the scope of the command, and then all the DCCHs.
When a DCSM is monitoring an ACCH, it detects:
a. loss of CCH synchronization
b. SID errors
c. mismatches between the CCH onto which the ICP commanded the
cell site monitor to lock and the CCH onto which the cell site monitor
is locked
When a DCSM is monitoring a DCCH, it also detects:
a. errors in the number of F-BCCH slots
b. errors in the number of E-BCCH slots
c. errors in the E-BCCH RCI locked
These errors are communicated to the CM as unsolicited messages.
When MON is ON, the ICP periodic audit process entails commanding the
DCSM to monitor the current CCH in sequence. Once the DCSM mobile is
locked onto the CCH, the ICP commands an audit order to be issued over the
CCH. If the audit order response is not received over the reverse CCH, then a
retry is attempted. Two consecutive failures results in the ICP reporting an
unsolicited audit order failure message to the CM. The message type
identifies either the CCH or the DCSM as the suspected cause of the failure.
OMs are consulted to determine if originations, or page responses, or
registrations were occurring during the period of the audit for the CCH under
test. If these OMs were being incriminated, then a failure of the DCSM is
presumed, otherwise a failure of the CCH is presumed.
If the DCSM mobile does not successfully lock onto the CCH, a new
unsolicited message is sent to the CM with a message type indicating the
failure to synchronize.
The goal is to revisit each CCH approximately every two minutes.
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9-4
Performing tests using a DCSM
Posting the DCSM
To use the DCSM to perform tests requires that the DCSM is in service
(INSV) state. The DCSM can be posted before a test is initiated from the
Maintenance and Administration (MAP) terminal (see Procedure 9-1).
Procedure 9-1
Posting the DCSM
Step
Action
Observation
At the MAP terminal, post the DCSM by entering:
>MAPCI;MTC;MTX;CELL 
>CTU;POST 
Ensure that the posted DCSM is in the INSV (in service) state. If
not, place the DCSM to the INSV state by entering:
>BSY;RTS
Control Channel tests
The Digital or Analog Control Channel can be monitored and tested using the
DCSM located in the same partition in which the DCCH/ACCH serves.
The following tests are available from the MTX MAP position.
CCH MAP level:
• forward DCCH/ACCH RF power measurement (POWER)
•
reverse DCCH/ACCH RF power measurement (RSSI)
•
ACCH Overhead Message Train monitoring (CCHOMT)
•
DCCH F-BCCH and E-BCCH parameter reporting (DCCHPARM)
CTU MAP level:
• Background round robin monitoring (MON)
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Performing tests using the DCSM in the directed mode
9-5
Preparing for Control Channel tests
Before any of the Control Channel tests can be invoked from the MAP
terminal, the DCSM as well as the DCCH or ACCH to be tested must be
posted. The Control Channel test setup is described in Procedure 9-2.
Procedure 9-2
Control Channel test set-up
Step
Action
Observation
At the MAP terminal, post the DCSM by entering:
>MAPCI;MTC;MTX;CELL 
>CTU;POST 
Make sure that the posted DCSM is in the INSV (in service) state.
If not, place the DCSM to the INSV state by entering:
>BSY;RTS
Post the Control Channel to be tested by entering:
>CCH;POST 
Make sure that the posted CCH is in the INSV state. If not, place
the CCH to the INSV state by entering:
>BSY;RTS
If the DCSM is in a sectored configuration, force the DCSM to scan
the DCCH of the sector that is to be tested by entering:
>MON ON ,
(Sector Designation) (ACCH, DCCH, or Both)
For example: >MON ON X D (You must only monitor the CCH
under test)
A = monitor ACCH
only
D = monitor DCCH
only
Both = monitor both
CCH types through
background
monitoring
The DCSM is now ready to test the desired CCH.
Note: For MTX04 monitoring only needs to be invoked to run the CCH
power test. For earlier MTX releases, monitoring must be invoked for all
CCH tests.
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9-6
Performing tests using a DCSM
Measuring Forward Control Channel RF power
The DCSM can be directed to take a Power measurement on the currently
active CCH. Raw RSSI readings are returned from the DCSM and are
translated into dBm at the CM. Procedure 9-3 is used to test the forward
power.
Procedure 9-3
Measuring forward CCH RF power
Step
Action
Make sure that the DCCH and the DCSM have been posted and
are in the INSV state as per the Control Channel Test Setup
Procedure.
At the CCH LEVEL OF THE MAP, enter:
Observation
>TST POWER
Measuring Reverse Control Channel power
For this test the DCSM is directed to terminate a call. The MTX then directs
the CCH to measure the TX power of the DCSMs page response (RECC or
RACH). The readings are in a raw format and are translated into dBm at the
CM. Procedure 9-4 is used to test the reverse power.
Procedure 9-4
Measuring reverse CCH RF power
Step
Action
Make sure that the DCCH and the DCSM have been posted and
are in the INSV state as per the Control Channel Test Setup
Procedure.
At the CCH LEVEL OF THE MAP, enter:
>TST RSSI
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Observation
Performing tests using the DCSM in the directed mode
9-7
Round Robin Monitoring
The MON command is executed from the CTU level of the MAP position
with a posted INSV DCCH or ACCH.
The MON command forces the DCSM to scan specific CCHs as specified in
the command options.The MON command sequence is as per Procedure 9-5.
Procedure 9-5
Round Robin Monitoring
Step
Action
Observation
Make sure that the DCCH or ACCH and the DCSM have been
posted and are in the INSV state as per the Control Channel Test
Setup Procedure.
If the DCSM is in a sectored configuration, force the DCSM to scan
the DCCH of the sector that is to be tested by entering:
>MON ON , 
(Sector Designation), (ACCH, DCCH, or Both)
A = monitor ACCH
only
D = monitor DCCH
only
Both = monitor both
CCH types
Example:
MTX120 JUL04 12:12:30 1123 INFO Terminal
Maintenance Event
CELL 15
CTU 0
PRTN: Y
EVENT: Unsol Wrong CCH
REASON: CCH Number Wrong
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MTX08
9-8
Performing tests using a DCSM
Querying ACCH OMT parameters
The DCSM can also be queried for the latest ACCH OMT parameters (see
Procedure 9-6).
Procedure 9-6
Querying ACCH OMT parameters
Step
Action
Make sure that the ACCH and the DCSM have been posted and
are in the INSV state as per the Control Channel Test Setup
Procedure.
At the ACCH level of the MAP position enter:
Observation
>TST CCHOMT
The system responds by displaying the information on the MAP
terminal. Check the log values reported against the system datafill.
Results displayed on
MAP terminal.
Querying FDCCH parameters
The DCSM can also be queried for the latest F-BCCH and E-BCCH
parameters (see Procedure 9-7). Reported parameters include all mandatory
F-BCCH and E-BCCH messages. This test is only valid for IS-136.1 DCCHs.
Procedure 9-7
Querying the DCSM parameters
Step
Action
Ensure that the DCCH, VCH and the DCSM have been posted and
are in the INSV state as per the Control Channel Test Setup
Procedure.
At the DCCH level of the MAP position enter:
>TST DCCHPARM {F,E,ALL}
Observation
Options:
F - request is for
FBCCH parameters
E - request is for
EBCCH parameters
ALL - request is for
FBCCH and EBCCH
parameters
The system responds by generating an MTX170 log. Check the log
values reported against the system datafill.
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Performing tests using the DCSM in the directed mode
9-9
MTX CTT tests
MTX CTT (Cellular Terminal Tests) tests use the DCSM as a test mobile to
test AVCHs by looping around a tone generated by the MTX Trunk Test
Terminal (TTT). These tests measure the performance of the specified AVCH
and associated trunks. The performance criteria measurable are:
• wireline trunk audio performance (loss) and associated noise
(MALT, MAHT)
•
wireless trunk RF performance (loss) and associated noise
(MRLT, MRHT)
•
forward and reverse RF strength performance (MRLP, MRLR)
•
system call set-up capability (MTRM, DTRM)
Naming conventions
All MTX trunk tests use a four letter acronym to describe the functionality of
the test. Each letter of the test acronym is explained in Table 9-1.
Table 9-1
Naming convention of the MTX trunk tests
Letter #
Designation
M = MTX — test a MTX VCH trunk
D = DCCH — set-up VCH trunk
A = Audio — test the audio link of the trunk
(DCSM is not a requirement)
R = RF — test the RF link of the trunk
L = Low — use a low level tone for the test
H = High — use a high level tone for the test
T = Transmission — measure transmission loss and
noise
R = Receiver — measure the reverse RF power level
of the VCH
P = Power — measure the forward RF power level of
the VCH
Note: DTRM and MTRM violate this naming convention.
MTX Audio Low Test and MTX Audio High Test (MALT/MAHT)
This test does not require a DCSM. The MALT and MAHT test measures the
following MTX trunk parameters:
• far-to-near-loss
•
loop loss
•
loop noise
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MTX08
9-10
Performing tests using a DCSM
The MALT and MAHT tests can be invoked in the following ways:
• from a posted transceiver at the VCH MAP level
•
from the CTT level (the first available VCH is selected)
•
automatically using Table CTTSCHED (also selects first available VCH)
The MALT and MAHT test use the TTT to inject a low and high level (the
level and frequency is determined by the CTTPARMS tuple) audio tone
respectively onto the MTX trunk. The audio tone is looped from the forward
to the reverse audio by the DUT (that is, the TRU) located at the cell site and
the returned level is measured by the TTT. The TTT also makes a
measurement of the noise level accompanying the audio signal at the return
end of the loop. The MALT and MAHT tests do not use the DCSM as part of
the test path. Figure 9-1 shows the test path and the measured path
measurements.
Figure 9-1
MALT and MAHT CTTPARMS Fields
Tone injected
Loop Loss (measured)
Near to Far Loss (Calculated)
DRU or BST
DUT
Network
NM
DCSM
TTT
Far-to-near loss (measured)
(MTX Switch)
Tone measured
and Loop Noise
level (dBrn)
Cell Site
Running the MALT and MAHT test
Before either the MALT or MAHT test is run be sure that the appropriate test
parameters are datafilled in Table CTTPARMS.The MALT test is invoked at
the VCH level of the MAP position on a posted channel. Procedure 9-8 lists
the step by step manual method of invoking the MALT and MAHT tests.
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9-11
Figure 9-2
MALT Test Output MTX303 Log
MTX303 JUN29 12:12:12
2500 CTT TRANSMISSION TEST
CELL: 20x
TEST: MALT
VCH: 10
HW: DRU
PASS
PA_EML: -20 dB LP_EML: -20dB TONE: 10 dBm
LP_LOSS: 0.0 dB FN_LOSS: -0.3 dB NF_LOSS: 0.3 dB
NML: 25 dB
NIAL: 30 dB
NOISE: 21 dBRN
Procedure 9-8
Initiating the MALT/MAHT test
Step
Action
Observation
Go to the MAP level of the MTX radio (VCH) to be
tested:
(example) MAPCI;MTC;MTX;CELL 100;VCH
Post the radio to be tested:
(example) POST 2
Invoke the MALT/MAHT test on the posted radio:
TST MALT or TST MAHT
Wait for the results of the MALT/MAHT test. The
MTX will display them once the test is complete.
If the results fail check that the CTTPARMS fields
are correctly datafilled. Then repeat the test to
verify the failure.
The MTX will indicate that the test is
underway.
See Figure 9-2.
Refer to the DualMode 800 Enclosure Troubleshooting Guide, 411-2051-900,
for more information of the fields in MTX303 Log. Below are the descriptions
of the fields of MTX303 which give the actual measure results:
LP_LOSS - The Loop Loss measured in dB
FN_LOSS - The Far-to-Near Loss in dB, calculated from LP_Loss - NF_Loss
NF_LOSS - The Near-to-Far Loss measured in dB
NOISE - The Loop Noise Level measured in dBrn
Figure 9-3
MAHT Test Output MTX303 Log
MTX303 JUN29 12:12:12
2500 CTT TRANSMISSION TEST
CELL: 20x
TEST: MAHT
VCH: 10
HW: DRU
PASS
PA_EML: -20 dB LP_EML: -20dB TONE: 10 dBm
LP_LOSS: 0.0 dB FN_LOSS: -0.3 dB NF_LOSS: 0.3 dB
NML: 25 dB
NIAL: 30 dB
NOISE: 21 dBRN
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MTX08
9-12
Performing tests using a DCSM
Troubleshooting action
If the test fails then it should be repeated for verification. Should the test still
fail the following hardware components may be at fault:
• the TRU
•
ICRM packs (the AX50s, AX47s, AX87s)
•
the T1 transmission equipment used
•
the ICP cards (the AX50s)
The signal may be rerouted to eliminate and pinpoint faulty hardware
components, or the equipment may be swapped one at a time with known
good units and the test repeated. When the test passes the faulty unit may have
been found.
The MTX RF Low and High Tests (MRLT and MRHT)
The MTX RF Low and High tests measure an audio tone which has been looped
at the DCSM. The test verifies the RF path on the forward and reverse links of
the DUT. The test therefore verifies the RF portion of the circuit. The MRLT
test measures the following three parameters of the circuit:
• the Loop Loss
•
the Loop Noise
•
the Path Far-to-Near Loss
The MRLT and MRHT tests can be invoked in the following ways:
• from a posted transceiver at the VCH MAP levels
•
from the CTT level (all available VCH are tested starting with the first
available)
•
automatically using Table CTTSCHED (this also selects the first available
VCH)
Once the test is invoked a call is terminated to the DCSM mobile. The DCSM
then transmits a 1004 Hz tone at 2.9 kHz deviation for 5 seconds, after which
the FWD audio is looped to the REV audio. The TTT then transmits a tone
(level and frequency determined in Table CTTPARMS) which is transmitted
on the forward RF path by the DUT to the DCSM. The DCSM subsequently
loops the forward audio to the reverse audio and transmits the tone to the
DUT through the reverse RF path. The returned audio is finally measured by
the TTT. The values measured are returned in the log report which is
subsequently reported to the technician at the MAP terminal through MTX
Log 303. Figure 9-4 shows the test path and the measured path measurements.
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9-13
Figure 9-4
MRLT and MRHT CTTPARMS fields
Tone Injected
Loop Loss Measured
DRU or BST
RF path
MS
DUT
Network
NM
TTT
DCSM
Far-to-Near Loss Measured
Tone Measured
and Loop Noise
level dBrn
How to Invoke the MRLT/MRHT test
Before the test is run the appropriate CTTPARMS tuple must be datafilled
with the correct values. With the CTTPARMS tuple correctly datafilled and
selected through CTTGROUP the test may be initiated either manually from
the MAPCI level (VCH or CTT) or automatically using CTTSCHED.
Procedure 9-9 outlines the manual method of invoking the MRLT and MRHT
tests.
Procedure 9-9
Initiating the MRLT/MRHT tests
Step
Action
Observation
Go to the MAP level of the MTX radio (VCH) to be
tested:
(example) MAPCI;MTC;MTX;CELL 100;VCH
Post the radio to be tested:
(example) POST 2
Invoke the MRLT/MRHT test on the posted radio:
TST MRLT or TST MRHT
Wait for the results of the MRLT/MRHT test. The
MTX will display them once the test is complete.
If the results fails check to see if the CTTPARMS
fields are correctly set.Then repeat the test to
verify the failure.
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The MTX will respond
that the test is underway.
See Figure 9-5.
Maintenance Manual
MTX08
9-14
Performing tests using a DCSM
Figure 9-5
MRLT Test Output MTX303 Log
MTX303 JUN29 12:12:12
2500 CTT TRANSMISSION TEST
CELL: 20x
TEST: MRLT
VCH: 10
HW: DRU
PASS
PA_EML: -20 dB LP_EML: -20dB TONE: 10 dBm
LP_LOSS: 0.5 dB FN_LOSS: -0.3 dB NF_LOSS: 0.2 dB
NML: 3.0 dB
NIAL: 5.0 dB
NOISE: 22 dBRN
Refer to the DualMode 800 Enclosure Troubleshooting Guide, 411-2051-900,
for more information of the fields in MTX303 Log. Below are the descriptions
of the fields of MTX303 which give the actual measure results:
LP_LOSS - The Loop Loss measured in dB
FN_LOSS - The Far-to-Near Loss measured in dB
NF_LOSS - The Near-to-Far Loss calculated in dB (LP_Loss-FN_Loss)
NOISE - The Loop Noise Level measured in dBrn
Figure 9-6
MRHT Test Output MTX303 Log
MTX303 JUN29 12:12:12
2500 CTT TRANSMISSION TEST
CELL: 20x
TEST: MRHT
VCH: 10
HW: DRU
PASS
PA_EML: -20 dB LP_EML: -20dB TONE: 10 dBm
LP_LOSS: 0.5 dB FN_LOSS: -0.3 dB NF_LOSS: 0.2 dB
NML: 3.0 dB
NIAL: 5.0 dB
NOISE: 22 dBRN
Refer to the DualMode 800 Enclosure Troubleshooting Guide, 411-2051-900,
for more information of the fields in MTX303 Log.
Troubleshooting action
If the test fails then it should be repeated for verification. Should the test still
fail the following hardware components may be at fault:
• TRU (CCH, or VCH)
•
related Power Amplifier(s)
•
Combiner
•
ICRM packs (the AX50s, AX47s, AX87s)
•
T1 transmission equipment used
•
ICP cards (the AX50s)
•
DCSM
The signal may be rerouted to eliminate and pinpoint faulty hardware
components, or the equipment may be swapped one at a time with known
good units and the test repeated. When the test passes the faulty unit may have
been found. Additionally, determine if the MALT or MAHT test has passed or
not to isolate the path failure location further.
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9-15
TEST MRLP
This is the MTX RF Transmitter test. The test measures the following:
• the Tx Power(dBm) of the Forward RF link
The MRLP test can be invoked in the following ways:
• from a posted transceiver at the VCH MAP level
•
from the CTT level (all available VCH are tested starting with the first
available)
•
automatically using Table CTTSCHED (this also selects the first available
VCH)
Once the test is invoked a call is terminated to the DCSM mobile. The DCSM
then transmits a 1004 Hz tone at 2.9 kHz deviation for five seconds, after
which the FWD audio is looped to the REV audio. The TTT then transmits a
tone (level and frequency determined in Table CTTPARMS) which is
transmitted on the forward RF path by the DUT to the DCSM. The DCSM
subsequently loops the forward audio to the reverse audio and transmits the
tone to the DUT through the reverse RF path. Once the link has been verified,
the DCSM is instructed by the MTX to measure the level of the forward RF
signal. The measured level is returned to the MTX by the DCSM for
reporting. Refer to Figure 9-7 for a diagram of the test operation.
The test either passes or fails depending on the level returned is within the
limits set by the MRLP tuple in Table CTTPARMS. Table CTTGROUP
defines the RF power level which the DCSM should measure.
Figure 9-7
MRLP Test Measurements
RSSI Measured
Tone transmitted
DRU or BST
RF path
NM
Network
DUT
TTT
MS
DCSM
The DCSM measures
the RSSI of the Nearto-far on-air link.
The TTT measures
the tone level
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MTX08
9-16
Performing tests using a DCSM
How to invoke the MRLP test
Before the test is run the appropriate CTTPARMS tuple must be datafilled
with the correct criteria. With the CTTPARMS tuple correctly datafilled and
selected through CTTGROUP, the test may be initiated either manually from
the MAP level (VCH or CTT) or automatically using CTTSCHED. Procedure
9-9 outlines the manual method of invoking the MRLP test.
Procedure 9-10
Initiating the MRLP test
Step
Action
Observation
Go to the MAP level of the MTX radio (VCH) to be
tested:
(example) MAPCI;MTC;MTX;CELL 100;VCH
Post the radio to be tested:
(example) POST 2
Invoke the MRLP test on the posted radio:
TST MRLP
Wait for the results of the MRLP test. The MTX
will display them once the test is complete.
If the results fails check to see if the CTTPARMS
fields are correctly set. Then repeat the test to
verify the failure.
The MTX will respond
that the test is underway.
See Figure 9-8.
Figure 9-8
MRLP Test results MTX302 Log
MTX302 JUN29 12:12:12
2500
CTT RF POWER TEST
CELL: 20x
TEST: MRLP
VCH: 10
HW: BST PASS
VPL : 0
Tx PWR: -50 dBm
EXP PWR: -58 dBm
Q1PWR: 0 dB
Q2PWR: 2 dB
Refer to the DualMode 800 Enclosure Troubleshooting Guide, 411-2051-900,
for more information of the fields in MTX303 Log. Below are the descriptions
of the fields of MTX302 which give the actual measure results:
Tx PWR - The measured forward RF power in dBm
Troubleshooting action
If the test fails then it should be repeated for verification. Should the test still
fail the following hardware components may be at fault:
• TRU (ACH & VCH)
•
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•
Combiner
•
ICRM packs (the AX50s, AX47s, AX87s)
•
T1 transmission equipment used
•
ICP cards (the AX50s, AX27s)
•
DCSM
9-17
The signal may be rerouted to eliminate and pinpoint faulty hardware
components, or the equipment may be swapped one at a time with known
good units and the test repeated. When the test passes the faulty unit may have
been found. Additionally, determine if the MALT or MAHT test has passed or
not to isolate the path failure location further.
TEST MRLR
The MTX Radio receiver test. The test measures the following:
• the RSSI (dBm) of the reverse RF path
•
the Loop Loss in dB
Once the test is invoked a call is terminated to the DCSM mobile. The DCSM
then transmits a 1004 Hz tone at 2.9 kHz deviation for five seconds, after
which the FWD audio is looped to the REV audio. The TTT then transmits a
tone (level and frequency determined in Table CTTPARMS) which is
transmitted on the forward RF path by the DUT to the DCSM. The DCSM
subsequently loops the forward audio to the reverse audio and transmits the
tone to the DUT through the reverse RF path. Once the link has been verified,
the DUT is instructed by the MTX to measure the RSSI of the received RF
signal on the reverse RF path. The measured RSSI is returned to the MTX for
reporting along with the looped level measured by the TTT. Refer to Figure 99 for a diagram of the test operation.
The test either passes or fails depending on the RSSI level returned is within
the limits set by the MRLR tuple in Table CTTPARMS. Table CTTGROUP
defines the RF power level which the DCSM should transmit on the reverse
path.
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9-18
Performing tests using a DCSM
Figure 9-9
MRLR Test Measurements
Tone transmitted
DRU or BST
RF path
DUT
Network
NM
TTT
MS
DCSM
RSSI measured
The DUT measures
the RSSI of the Farto-near on-air link.
The TTT measures
the tone level
How to invoke the MRLR test
Before the test is run, the appropriate CTTPARMS tuple must be datafilled
with the correct criteria. With the CTTPARMS tuple correctly datafilled and
selected through CTTGROUP, the test may be initiated either manually from
the MAP level (VCH or CTT) or automatically using CTTSCHED. Procedure
9-11 outlines the manual method of invoking the MRLR test.
Procedure 9-11
Initiating the MRLR test
Step
Action
Observation
Go to the MAP level of the MTX radio (VCH) to be
tested:
(example) MAPCI;MTC;MTX;CELL 100;VCH
Post the radio to be tested:
(example) POST 2
Invoke the MRLR test on the posted radio:
TST MRLR
Wait for the results of the MRLR test. The MTX
will display them once the test is complete.
If the results fails check to see if the CTTPARMS
fields are correctly set. Then repeat the test to
verify the failure.
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The MTX will respond
that the test is underway.
See Figure 9-10.
Performing tests using the DCSM in the directed mode
9-19
Figure 9-10
MRLR Test results MTX302 Log
MTX302 JUN29 12:12:12
2500
CTT RF POWER TEST
CELL: 20x
TEST: MRLR VCH: 10
HW: BST
PASS
VPL : 0
Tx PWR: -50 dBm
EXP PWR: -58 dBm
Q1PWR: 0 dB
Q2PWR: 2 dB
Refer to the DualMode 800 Enclosure Troubleshooting Guide, 411-2051-900,
for more information of the fields in MTX303 Log. Below are the descriptions
of the fields of MTX302 which give the actual measure results:
Tx PWR - The measured reverse RF level in dBm
Troubleshooting action
If the test fails then it should be repeated for verification. Should the test still
fail the following hardware components may be at fault:
• the TRU (ACH & VCH)
•
ICRM packs (the AX50s, AX47s, AX87s)
•
the T1 transmission equipment used
•
the ICP cards (the AX50s)
•
the DCSM
The signal may be rerouted to eliminate and pinpoint faulty hardware
components, or the equipment may be swapped one at a time with known
good units and the test repeated. When the test passes the faulty unit may have
been found.
MTX Call Processing Mobile Termination Test (MTRM or DTRM)
For this test the DCSM is used to terminate a call. This test provides
verification of all call set-up commands and messages between the cell site
CCH, the AVCH under test and the ICP. Call set-up is through the ACCH
(MTRM) or DCCH (DTRM) to an AVCH.
For this test, use:
• MTRM if the partitions ACCH is to set-up the call termination test or
•
DTRM if the partitions DCCH is to set-up the call termination test
The mobile termination test is invoked from the VCH level of the MAP
position (test DTRM or MTRM). The posted VCH must be an AVCH. If the
posted VCH is a DTCH or DualMode VCH, the call will be in digital mode.
The user will be notified if an attempt is made to run the MTRM or DTRM
test on an AVCH which is servicing a call.
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9-20
Performing tests using a DCSM
Invoking the DTRM test
Now that the DCSM (scanning the DCCH of the partition) and the VCH are
posted the Call Termination test may be performed:
Procedure 9-12
Invoking the DTRM or MTRM tests
Step
Action
Observation
At the VCH MAP level enter:
TST DTRM or TST MTRM
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displaying the results of the DCCH or ACCH call setup.
November 1999
10-1
ICRM tests
10
There are no operational tests for the Integrated Cellular Remote Module
(ICRM) at the cell site. If you want to check the operation of the ICRM,
contact the operator at the MTX for assistance.
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MTX08
10-2
ICRM tests
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11-1
DRU tests
11
Introduction
The DualMode Radio Unit (DRU) is a cell site transceiver and power
amplifier combination that operates in either a TDMA (digital) mode or in a
conventional AMPS (analog) mode. For a DualMode 800 Enclosure, the DRU
is packaged in two sub-modules, the Transmit Receive Unit (TRU) and the
Multi-Channel Power Amplifier (MCPA) module.
TRUs are datafilled as analog only, digital only, or dual-mode from the
Maintenance and Administration Position (MAP) terminal which is typically
located at the Digital Multiplex System-Mobile Telephone Exchange (DMSMTX). When datafilled as dual-mode, TRUs operate dynamically in either
AMPS or TDMA mode, based upon control from the switch. Whether
operating in AMPS or TDMA mode, the TRU uses the same internal DSPbased circuitry to process both voice and data.
The use of Digital Signal Processing (DSP) technology greatly reduces
maintenance requirements. Due to functions being performed by software
code, rather than circuits composed of discrete elements that cause drift over
time and with temperature change, radio performance levels are improved and
routine maintenance schedules can be eliminated.
The DSP architecture of the TRU and microprocessor control of the MCPA
allow for very stable performance and consistency from one unit to another.
No manual adjustments are required on the TRU or the MCPA. There are, in
fact, no manual adjustable components in the TRU or MCPA. All adjustments
to operational parameters are made through the TRU terminal interface.
The most important item governing correct DRU operation is a proper, noncorrupt, software load within the TRU. The TRU software load is
downloadable from the MAP position through a Peripheral Module (PM) load
tape. TRUs can be upgraded or reloaded with their operating software without
requiring anyone to visit a cell site.
Figure 11-1 and Figure 11-2 show the front panel layouts of the TRU2 and the
TRU3 respectively. Figure 11-3 shows the front panel layout of the MCPA.
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MTX08
11-2
DRU tests
Figure 11-1
Front panel layout of the TRU2 (NTAX98AA)
Figure 11-2
Front panel layout of the TRU3 (NTAW99AA)
Status LEDs
RS-232 port for the
Terminal Interface
connector
Handle
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Functionality of the DRU
11-3
Figure 11-3
MCPA front panel layout
Status
+27VDC
Over
Pwr
High
Temp
VSWR
+15VDC
DC
Fail
ON
Fan
Fail
OFF
+5VDC
Loop
Fail
-5VDC
Low
Pwr
Reset
LPA
DISAB
On
Off
RF ON
Alarms
Functionality of the DRU
The TRU provides a Time Compressed Multiplex (TCM) interface with the
Integrated Cellular Remote Module (ICRM). It also provides dual-receive
paths and diversity switching, and controls the Operation, Administration,
and Maintenance (OA&M) functions for the DRU. Control and signaling
messages communicated between the ICRM and the TRU are through a TCM
D-channel. Voice and data signals are communicated between the ICRM and
the TRU through a TCM B-channel.
Depending on the mode, the AMPS or TDMA baseband signal generated by
the TRU in a DualMode 800 Enclosure is modulated in the TRU. The
modulated signal is then sent to the MCPA. The MCPA amplifies and
transmits the signal to the mobile in the appropriate AMPS (analog) or π/4
DQPSK (digital) format. The TRU receives composite RF signals from the
mobile, extracts embedded control messages, and routes the control and voice
signals to the ICRM.
Audio sensitivity of the TRU
In AMPS mode, as a speaker talks, the FM carrier varies as a function of the
audio waveform produced by the speaker’s voice. This variance is known as
the frequency deviation that corresponds to a specific audio level. Typical
audio levels range anywhere from -18 dBm0 to -22 dBm0.
For TDMA, the speech signal is encoded using the VSELP coding algorithm.
The VSELP codec per the IS-54-B standard is optimized for a value being
equated to an audio level of -18 dBm0. Therefore, if an AMPS radio is not set
to an audio sensitivity of -18 dBm0, there will be some noticeable contrast in
audio level (loudness) when handoff occurs between the two modes.
To minimize the contrast between the two modes, Nortel Networks
recommends that the audio level in an analog network be adjusted to -18
dBm0, corresponding to ±2.9 kHz deviation, in each direction of
transmission. This recommendation concurs with the Joint Experts Meeting
as reported to the CTIA in March 1992. For TRUs working in the AMPS
Wireless Solutions
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Maintenance Manual
MTX08
11-4
DRU tests
mode to be fully IS-54-B compliant, the audio sensitivity is factory set to -18
dBm0. However, the audio sensitivity can be adjusted by performing the
Transmit and the Receive Audio Level tests as described later in this chapter.
Test considerations
This manual outlines the tests that should be performed on a DualMode Radio
Unit (DRU) when it is installed or replaced. It describes tests that can be
performed on the DRU, although not required, in a DualMode 800 Enclosure.
Also described are system checks related to a complete cell site system
containing DRUs. The tests ensure that the DRU provides service to mobile
users and meets the basic operating parameters. The tests are divided into the
following sections in this manual:
• Installation/Replacement tests—check the operational parameters of the
DRU
•
Transmit tests—check the transmit parameters of the DRU
•
Receive tests—check the receive parameters of the TRU
•
Power output test—checks the transmit power level of the MCPA at the
duplexer
•
Digital tests— the bit error rate loopback test checks that the transmit and
receive paths of the TRU meet the specifications. A digital call through
test checks that TDMA call processing is performed correctly.
Note: The tests apply to both the TRU2 and TRU3 unless otherwise
stated for the individual unit. Currently the TRU3 does not support AMPS
operation and therefore performing the AMPS-related tests (for example,
SAT/ST frequencies, TX/RX audio levels) are not required on the TRU3.
Due to the operating characteristics of the DRU being determined by
software, very few tests are needed upon installation of a TRU or a MCPA
into a TRU shelf or a MCPA shelf respectively.
Tests that can be performed on a DRU as operational checks are outlined in
this chapter. These tests are not required upon installation, replacement, or on
a periodic basis, but are outlined for troubleshooting purposes.
CAUTION
Some of the tests are service affecting at the cell/sector level. If
you do need to perform these tests, schedule your work at a
low traffic period to minimize service interruption to your
customers.
Due to the tests affecting the ability to process calls, it is necessary to “busy
out” and “off-line” the DRUs, from the MTX, before testing begins.
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Test equipment required
11-5
Whenever a test is performed on a DRU, record the test parameter. You
should test only one DRU at a time. Unless specified elsewhere, testing
should be carried out within the +15° C (+59° F) to +35° C (+95° F)
temperature range.
Power and Ground Verification (Chapter 4), Master Oscillator Testing and
(Chapter 5) may be required before conducting some DRU tests.
Test equipment required
Proper setup of the test equipment is critical in obtaining proper test results.
Consistency of setup and techniques from one person to another is essential
for obtaining proper system operation.
It is assumed that the operator is familiar with the test equipment used in the
test procedures. The following test equipment is recommended for
performing the tests. Any functionally equivalent unit may be used in its
place. Double shielded coaxial cables are recommended for use between test
equipment and the cell site equipment being tested.
Note: Ensure that all test equipment is calibrated before use. Cable loss
must be accounted for in the MCPA RF output power tests.
For a list of the required test equipment, refer to Chapter 3, Test Equipment
and Precautions, in this manual.
This section describes the tests that can be performed on a DualMode Radio
Unit (DRU). These tests can be used to verify the performance of a DRU but
they are not required on a periodic basis.
Note: The DRU, the ICRM and the test equipment should be powered up
for at least half an hour before the tests. Inaccurate measurements may
result if the warm-up period is less than 30 minutes.
A VT100 Video Display Terminal (or equivalent) is required to perform the
tests. Refer to the Test Equipment section in Chapter 3, Test Equipment and
Precautions, for setting up the parameters of the terminal. For a complete list
of the Terminal Interface commands, refer to the Transmit Receive Unit
section in Chapter 1, Equipment operation.
TRU self test
A built-in self test can be performed on a TRU (EEPROM CRC check for a
TRU2 and a CRC check for a TRU3).
Use the following procedure to perform the self test:
1. Connect the interface terminal to the RS-232 port on the front panel of the
TRU under test.
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11-6
DRU tests
2. Place the TRU into the command line mode by pressing the “Break” key
on the interface terminal. The terminal will display the following:
TRU Terminal Interface
Copyright 1990,1991 Bell Northern Research, Inc.
3. To place the TRU into the fullscreen monitor mode, enter:
>SET LT OFF
>SET FS ON
(disables the LAPD timeout)
(invokes fullscreen display)
This places the TRU into the fullscreen AMPS mode (refer to Figure 1-8).
TRU EEPROM CRC Check
4. Check the top right corner of the screen and verify that the EEPROM
CRC Check has passed. The EEPROM CRC Check on the screen (refer to
Figure 1-8 in Chapter 1, Equipment operation) will show:
EEPROM CRC Check: PASSED
Record the result. If the check fails, replace the TRU.
5. Disconnect the interface terminal from the TRU under test.
DRU configurations for analog tests
The Transmit Receive Unit (TRU) must be correctly configured for each test.
This section covers the general test set-ups for the TRU.
Nominal Application Gain
In a DualMode 800 Enclosure, all TRUs are set to “patype none” mode
during installation. In this mode, the nominal application gain is set to a
default value of -12 dB and the TRU maximum transmit power is set to a
default value of +15 dBm. Do not change these default settings during the
tests.
With default settings in the “patype none” mode, the output of the TRU is set
to [+15 - (-12)] = +27 dBm at the TRU backplane. Therefore, when checking
the TRU output with the “query pastatus” command, please remember that
the +15 dBm TRU output has been compansated for by the -12 dB norminal
application gain to give an actual TRU output of +27 dBm at default.
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11-7
TRU setup
All the DualMode Radio Unit (DRU) tests are performed through an interface
terminal. Before performing any tests, connect an interface terminal to the RS232 port on the front panel of the TRU. Place the TRU into the command line
mode by pressing the “Break” key on the terminal. To place the TRU into the
fullscreen analog (AMPS) mode, at the command line prompt (>), enter:
>SET LT OFF (disables the LAPD timeout)
(configures TRU to the modulated mode for no percarrier PA application)
>SET PATYPE NONE
>SET FS ON
(invokes fullscreen display)
Check the configurations of the TRU from the interface terminal. For each
individual test, change the specific configuration(s) as required. Table 11-1
shows the TRU configurations in the initial setup and in the individual tests.
Status or values in bold indicate the change to that specific configuration
during the tests. Refer to Table 1-2 in Chapter 1, Equipment operation, for a
complete description of the fullscreen commands.
With reference to Table 11-1, verify that the DRU configurations are as listed
in the initial setups from the interface terminal:
Carrier status
If the carrier (shown in the PA field on the screen) is on, turn it off by
entering:
>C
The PA field on the screen should show:
PA: off
Compandor
If the Compandor is off, turn it on by entering:
>K
The Compandor field on the screen should show:
Compandor: on
SAT Transmit
If the SAT TX is on, turn it off by entering:
>G
The SAT TX field on the screen should show:
SAT TX: 6000 (off)
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OFF
OFF
OFF
OFF
OFF
OFF
Residual Modulation
TX Audio Level
Modulation Limiting
1 kHz Tone Gen
End of TX Tests
RX Tests Initial Setup
OFF
OFF
End of Power Test
OFF
OFF
OFF
OFF
OFF
OFF
OFF
TRU Power Output
Power Test Initial Setup
End of RX Tests
ST Detect
SAT Detect
RSSI Detect
RX Audio Level
RX/TX Audio Sens
OFF
ON
SAT Transmit
Receive Sensitivity
OFF
Wideband Modulation
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
RF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
RF
RF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
OFF
TX Carrier Frequency
OFF
OFF
OFF
OFF
TX Tests Initial Setup
OFF
Compandor
Loop
back
Tone
Gen
Commands
SAT
TX
TRU Configurations
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
Wide
Band
Data
OFF
OFF
OFF
OFF
ST
SAT
RSSI
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
1 4
1 4
1 4
1 4
1 4
1 4
1 4
1 4
1 4
1 4
1 4
1 4
1 4
1 4
1 4
1 4
1 4
1 4
1 4
1 4
Detect Antenna Receive
SAT, ST,
Path
Ports
RSSI
Receive Status
Power
Index
Power
Step
15.0
15.0
15.0
15.0
15.0
15.0
15.0
15.0
15.0
15.0
15.0
15.0
15.0
15.0
15.0
15.0
15.0
15.0
15.0
15.0
Max
Power
TRU Power Settings
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
OFF
Carrier
On/Off
OFF
OFF
OFF
OFF
OFF
OFF
RX
TX RX
TX RX
OFF
OFF
OFF
OFF
TX
TX
OFF
OFF
OFF
OFF
OFF
Audio
Status
-18.0
-18.0
-18.0
-18.0
-18.0
-18.0
-18.0
-18.0
-18.0
-18.0
-18.0
-18.0
-18.0
-18.0
-18.0
-18.0
-18.0
-18.0
-18.0
-18.0
Audio
Sens
TX/RX Audio
11-8
DRU tests
Table 11-1
DRU configurations for analog tests
DRU configurations for analog tests
11-9
Loopback
If the Loopback status is either BCH or RF, turn it off by entering:
>J
The TRU will request an antenna path choice (either BCH, RF or OFF). To
turn the Loopback off, enter:
>OFF
The Loopback field on the screen should show:
Loopback: off
Tone Gen
If the Tone Generation status is either BCH or RF, turn it off by entering:
>I
The TRU will request an antenna path choice (either BCH, RF or OFF). To
turn the Tone Gen off, enter:
>OFF
The Tone Gen field on the screen should show:
>Tone Gen: off
Antenna Path
If the Antenna Path status is not Path A, select Path A by entering:
>N
The TRU will request an antenna path choice (either A, B or DIV). To select
Path A, enter:
>A
The Antenna Path field on the screen should show:
>Antenna Path: A
Antenna Port
If the Antenna Port status is not Ports 1 and 4, select Ports 1 and 4 by
entering:
>M
The TRU will request the port numbers (enter a port number 1, 2 or 3 for
antenna path A, and a port number 4, 5 or 6 for antenna path B). Enter the
antenna ports as two numbers separated by a space (first number indicates
antenna port in path A and second number indicates antenna port in path B):
>1 4
The Antenna Port field on the screen should show:
>Antenna Port A: 1 B: 4
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Maintenance Manual
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11-10
DRU tests
Transmit Power Level Index
If the TxPwrIndex status is not 0, set it to 0 by entering:
>E
The TRU will request a specific power level (0..7). To set power level to 0,
enter:
>0
The TxPwrIndex field on the screen should show:
TxPwrIndex: 0
Transmit Power Step Size
If the TxPwrStep status is not 4, set it to 4 by entering:
>U
The TRU will request a power step size (1..4 in 0.25 dB increments). To set
power step size to 4, enter:
>4
The TxPwrStep field on the screen should show:
TxPwrStep: 4
Maximum Transmit Power
If the PA Max power status is not 15.0 dBm, set it to 15.0 dBm by entering:
>F
The TRU will request a power level (-1.0...27.0 in dBm). To set Max power to
15.0, enter:
>15.0
The MaxTxPwr field on the screen should show:
MaxTxPwr: 15.00
Audio Status
If the TX and RX audio status is either ‘TX’, ‘RX’ or ‘TX RX’, turn the
audio off by entering:
>R
The DRU will request for either ‘TX’, ‘RX’, ‘BOTH’ or ‘OFF’. Enter:
>OFF
The Audio field on the screen should show:
Audio: off
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11-11
TX Audio Sensitivity
If the TX Audio Sens status is not -18.0, and no other level has been specified,
set the TX audio sensitivity to -18.0 dBm by entering:
>T
The DRU will respond as follows:
Enter TX or RX and a decimal dBm value (TX:-28...
-10);(RX:-28...-16)
Enter:
>TX -18.0
The Audio Sens TX status on the screen will show:
Audio Sens Tx: -18.0
RX Audio Sensitivity
If the RX Audio Sens status is not -18.0, and no other level has been
specified, set the RX audio sensitivity to -18.0 dBm by entering:
>T
The DRU will respond as follows:
Enter TX or RX and a decimal dBm value (TX:-28...
-10);(RX:-28...-16)
Enter:
>RX -18.0
The Audio Sens RX status on the screen will show:
Audio Sens Rx: -18.0
Wireless Solutions
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Maintenance Manual
MTX08
11-12
DRU tests
DRU transmit tests
This section describes the transmit tests that can be performed on the
DualMode Radio Unit (DRU). RF output power tests are described in the
DRU RF output power test section.
Note: The tests can be performed separately but the DRU transmit test
setup procedure must be performed before each individual test.
WARNING
RF radiation hazard
Do NOT disconnect any RF cables when transmitters are on.
Service impacts
Directly testing the TRU through the antenna port of the duplexer will put the
entire cell/sector out of service.
Indirectly testing the TRU through the sniffer port of the duplexer will affect
only the TRU under test. However, the measurement may not be as accurate
because the level is approximately 50 dB down with a tolerance of up to ±5
dB.
Transmit test setup procedure
CAUTION
Service interruption
The service of the entire cell/sector of the TRU under test will
be affected. Perform the tests during low traffic period.
1. At the MTX, busy and off-line the TRU under test and the TRUs
connected to the same MCPA shelf.
Note: The service supported by the MCPA shelf will be affected.
2. Connect the interface terminal to the RS-232 port on the front panel of the
TRU under test. Verify that the DRU configurations for TX tests initial
setup are as listed in Table 11-1.
Note: Ensure that all the TRUs connected to the MCPA shelf are off.
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11-13
3. Connect the receive input of the communications monitor to the antenna
port of the duplexer. Use a low loss double shielded cable, RG-214 or
equivalent. Figure 11-4 shows the connection setup for the transmit tests.
Note: If you do not want to interrupt service, connect to the sniffer port
on the duplexer instead. The level is approximately 50 dB down with a
tolerance of up to ±5 dB.
4. From the terminal, select the channel assigned to the TRU under test by
using the B command.
>B
The TRU will request a channel number. Enter the channel number for the
frequency assigned to the TRU under test (1...799 or 990...1023). Refer to
Appendix A for the channel-to-frequency conversion information.
>xxxx
On a successful channel change, the Channel and Synth Lock fields will
be updated:
Channel: xxxx (DRU channel number indicated)
Synth Lock: YES (Sync Lock changes to ‘YES’)
5. On the communications monitor, set the transmit RF frequency to the
frequency corresponding to that of the TRU under test.
6. Turn on the TRU (the transmit carrier) with the C command.
>C
The PA status on the screen will change to:
PA: on
7. Proceed with the transmit tests.
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11-14
DRU tests
Figure 11-4
DRU transmit tests setup (service affecting)
Diversity Receive
Main
Transmit / Receive
Receive Multicoupler
Other TRU
Shelves
1:8
Splitter
Preselect
Filter
LNA
Duplexer
RX Bandpass
Filter
Receive Multicoupler
Other TRU
Shelves
1:8
Splitter
Preselect
Filter
LNA
TX Bandpass
Filter
Sniffer
TRU Shelf
TRU 1
TRU 2
MCPA Shelf
4:1 Combiner
1:8 Splitters
•••• • •
•••• • •
Tx
Combiner
MCPAs
TRU 7
VT100
TRU 8
Voice
To
MTX
Inputs
Outputs
Data
Alarm
Control Unit
High Stability
MasterOscillator
AUTO
GEN
65W
IN MAX
SGL
STEP
RCVR
DUPLEX
FM/AM
1600S
POWER
FM /A M
DPLX
GO
AF
GEN
STOP
PRINT
SCRN
SETUP
SHIFT
MTRS
HOLD
SCRN
STORE
RCL
MEMORY
AUX
MIC/ACC EXT MOD
A P P L I
O END
SINAD
km
Enter
CE
DEL
EDIT
SQLCH
AUDIO
DEMOD
OUT
OUT
VΩ
VOL
DMM
COM
F2
F3
F4
F5
F6
IN/OUT
IN
IN
1KVDC/500V
AC MAX
Communications Monitor (IFR 1600)
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SELECT
SCOPE
ANLZ
1 6 0 0 S
DATASCROLL
MODE
65W
OUT MAX
INTENSIT
FIELD
DATAENTRY
RF
ANTENNA
TESTCONTROL
Integrated
Cellular
Remote
Module
(ICRM)
Alarm
Other TRU
Shelves
Data
2 AMPS
MAX
^ v
< >
SCOPE
T/R
200W
MAX
IN
200 VDC
MAX
IN/OUT
DRU transmit tests
11-15
Transmit Carrier Frequency test
This test ensures that the TRU is transmitting at the assigned frequency.
Step
Action
Observation
Ensure that the TRU configurations are as
listed in Table 11-1 for the Transmit Carrier
Frequency test.
Check the transmit carrier frequency on the
communications monitor. The frequency
error (FREQ ERR) is also shown on some
communications monitors.
Record the assigned frequency (in MHz) and
the frequency error (in Hz) on the test forms.
±220 Hz of the assigned frequency.
Wideband Modulation test
This test ensures that the transmit carrier deviation of the TRU is within
specifications when the TRU is transmitting wideband data.
Step
Action
Observation
Ensure that the TRU configurations are as
listed in Table 11-1 for the Wideband
Modulation test.
From the interface terminal, use the L
command to select Wideband Data.
>L
TRU begins to transmit wide band data and
the screen shows:
continuing Wideband Data TX..
(press return to quit)
Check the carrier frequency deviation as
displayed on DEV (deviation) meter.
Deviation between 7.2 kHz and 8.8 kHz.
Record the deviation on the test forms.
Press the “Return” key to stop the wideband
data transmission.
Wireless Solutions
TRU stops transmitting wide band data and
the screen shows:
Wideband data is off
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11-16
DRU tests
SAT Frequency and Deviation tests
Supervisory Audio Tones (SAT) are used for out-of-band signaling. This test
ensures that the SAT frequency and deviation transmitted by the TRU are
within specifications.
Step
Action
Observation
Ensure that the TRU configurations are as
listed in Table 11-1 for the SAT Transmit test.
From the interface terminal, use the G
command to turn on the SAT.
>G
The screen shows:
SAT TX: 6000 (on)
Check the SAT frequency as displayed on
the AF (frequency) meter.
SAT frequency should be 6000 Hz ±5 Hz.
Check the SAT carrier frequency deviation as
displayed on the deviation (DEV) meter.
Deviation between 1.8 kHz and 2.2 kHz.
Record the frequency and the deviation on
the test forms.
Use the H command to input a different SAT
frequency.
>H
The terminal will prompt with:
Enter a SAT frequency (5970,
6000, or 6030)
Select 5970 Hz SAT frequency by entering:
>5970
The screen shows:
SAT TX: 5970 (on)
Repeat steps 3 to 5 for the 5970 Hz SAT
frequency and deviation tests.
SAT frequency: 5970 Hz ±5 Hz
Deviation between 1.8 kHz and 2.2 kHz.
Repeat steps 6 to 8 for the 6030 Hz SAT
frequency and deviation tests by selecting
6030 Hz SAT frequency.
SAT frequency: 6030 Hz ±5 Hz
Deviation between 1.8 kHz and 2.2 kHz.
10
Use the G command to turn off the SAT.
>G
The screen shows:
SAT TX: 6030 (off)
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Residual Modulation test
This test ensures that the transmit carrier deviation of the TRU is within
specifications when the transmit audio of the TRU is muted.
Step
Action
Observation
Ensure that the TRU configurations are as
listed in Table 11-1 for the Residual
Modulation test.
Check the carrier frequency deviation as
displayed on the DEV meter.
Record the deviation on the test forms.
Deviation between -0.5 kHz and +0.5 kHz.
Transmit Audio Level test
This test ensures that the transmit carrier deviation of the TRU meets the
audio level specifications during a subscriber conversation in the AMPS
mode.
The AMPS mode of the TRU is currently set to a default value of -18 dBm0,
corresponding to ±2.9 kHz deviation, which is compliant to IS-138 Standards.
Step
Action
Observation
Ensure that the TRU configurations are as
listed in Table 11-1 for the Transmit Audio
Level test.
Note: Loopback and SAT TX must be set to
off in this test. Use the J and the G
commands to set Loopback and SAT TX to
off, if necessary.
The desired trunk should still be posted as in
the Tx Audio Level Test step 4.
From the interface terminal, use the R
command to turn on (unmute) the TX audio.
>R
The terminal will prompt for audio path:
Enter TX, RX, BOTH or OFF
Enter the option “TX”:
>TX
The Audio status on the screen shows:
Audio: TX
- continued -
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Maintenance Manual
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11-18
DRU tests
Step
Action
Observation
This step is performed at the MTX.
From the MAP position or with a second
terminal logged into the switch, test the trunk
that is assigned to the TRU being tested by
entering:
MAPCI;MTC;TRKS;TTP;POST (CLLI name)
(Trunk member number);TGEN 1004 -180
MAP Trunk Test Position is displayed. The
MAP screen will indicate the trunk member
selected and that the trunk is selected.
It will also indicate the tone generated and
the level of the tone.
Check the carrier frequency deviation as
displayed on the DEV meter.
Deviation between 2.61 kHz and 3.19 kHz.
Record the deviation on the test forms.
If the deviation is different from the site
specific Forward audio level setting, repeat
this test after all the transmit tests have been
completed. Set the deviation to the specific
operational level with the T command from
the interface terminal.
The transmit audio level is shown on the
terminal screen as:
Audio Sens Tx: -18.0 (change this
level as required—a change of 1 dBm is
approximately a change of 0.27 kHz in
deviation)
From the interface terminal, use the R
command to turn off (mute) the TX audio.
>R
The terminal will prompt for audio path:
Enter TX, RX, BOTH or OFF
Enter the option “OFF”:
>OFF
The audio status on the screen shows:
Audio: off
- End -
Modulation Limiting test
Modulation Limiting is the ability of the transmitter to effectively operate
within the system deviation limits. This test ensures that the transmit
carrier deviation of the TRU meets the system specifications.
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Step
Action
11-19
Observation
Ensure that the TRU configurations are as
listed in Table 11-1 for the Modulation
Limiting test.
Note: Loopback and SAT TX must be set to
off in this test. Use the J and the G
commands to set Loopback and SAT TX to
off, if necessary.
From the interface terminal, use the R
command to turn on (unmute) the TX audio.
>R
The terminal will prompt for audio path:
Enter TX, RX, BOTH or OFF
Enter the option “TX”:
>TX
The Audio status on the screen shows:
Audio: TX
This step is performed at the MTX.
Using the TGEN command at the MAP
position terminal, change the output level
and observe the Carrier Frequency Deviation
for each of the levels listed.
TGEN
TGEN
TGEN
TGEN
TGEN
TGEN
TGEN
1004
1004
1004
1004
1004
1004
1004
The Carrier Frequency Deviation will
increase to a maximum value at a certain
tone level and then the deviation value will
decrease. However, the maximum value
must be less than 12.0 kHz at all tone levels.
-100..........
-50...........
0.............
10............
20............
30............
50............
Deviation must be less than 12.0 kHz at all
levels.
Check the maximum carrier frequency
deviation as displayed on the DEV meter.
Record the maximum deviation obtained on
the test forms.
On the MAP position terminal, enter:
>RLS
The MAP screen will indicate that the trunk is
released and returns to its original state.
From the interface terminal, use the R
command to turn off (mute) the TX audio.
>R
The terminal will prompt for audio path:
Enter TX, RX, BOTH or OFF
Enter the option “OFF”:
>OFF
The Audio status on the screen shows:
Audio: off
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
11-20
DRU tests
1 kHz Tone Generation test
This test ensures that the frequency and deviation of the 1 kHz test tone
generated by the TRU are within specifications.
Step
Action
Observation
Ensure that the TRU configurations are as
listed in Table 11-1 for the 1 kHz Tone Gen
test.
From the interface terminal, use the I
command to generate an on-channel 1 kHz
tone at 8 kHz deviation.
>I
The TRU will prompt for the antenna path
choice:
Enter BCH, RF, or OFF
Enter the RF option to test the tone on the
RF side of the TRU.
>RF
The Tone Generation status on the screen
shows:
Tone Gen: RF
Check the 1 kHz Tone Gen frequency as
displayed on the AF meter.
The frequency should be 1000 Hz ±1 Hz.
Check the carrier frequency deviation as
displayed on the DEV meter.
Deviation between 7.2 kHz and 8.8 kHz.
Record the frequency and the deviation on
the test forms.
Use the I command to turn off the onchannel 1 kHz tone at 8 kHz deviation.
>I
The TRU will prompt for the antenna path
choice:
Enter BCH, RF, or OFF
Enter the “OFF” option to turn off the tone on
the RF side of the TRU.
>OFF
The Tone Generation status on the screen
shows:
Tone Gen: OFF
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DRU transmit tests
11-21
Setting TX audio deviation to site operational level
After the transmit tests, ensure that the deviation level recorded in the
Transmit Audio Level test is the same as the site specific operational level. If
the levels are different, perform the Transmit Audio Level test and change the
level to the site specific operational level by using the T command.
Set the TX audio sensitivity with the T command.
>T
The TRU will prompt as follows:
Enter TX or RX and a decimal dBm value (TX:-28...
-10);(RX:-28...-16)
Enter:
>TX -xx.x
(change this value as required to obtain the operational
transmit audio level)
Note: A change of 1 dBm is approximately a change of 0.27 kHz
deviation.
The Audio Sens TX status on the screen will show:
Audio Sens Tx: -xx.x (site specific operational level)
Use the C command to turn off the carrier of the TRU.
>C
The PA (TRU transmitter) status on the screen will show:
PA: off
Use the Y command to perform a reset on the TRU after the tests.
>Y
At the command prompt, perform a warm reset on the TRU by entering:
>W
The TRU will return to its normal working condition after the reset.
Disconnect the interface terminal from the TRU.
At the MTX, put the TRU back to service.
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
11-22
DRU tests
DRU receive tests
This section describes the receive tests that can be performed on the
DualMode Radio Unit (DRU).
Note: The tests can be performed separately but the DRU receive test
setup procedure must be performed before each individual test.
WARNING
RF radiation hazard
Do NOT disconnect any RF cables when transmitters are on.
Service impacts
The receive tests cause a reduction in the receive performance of the shelf
containing the radio under test because of the loss of receive diversity.
The TRU transmit tests must be performed before the receive tests to verify
the TRU’s transmit path. This is because the TRU uses an RF loopback to
access the base-band receive signal. Failure to verify the TRU transmit path
may result in invalid test data.
Receive test setup procedure
CAUTION
Service interruption
The service of the shelf housing the TRU under test will be
affected. Perform the tests during low traffic period.
1. At the MTX, busy and off-line the TRU under test.
2. Connect the interface terminal to the RS-232 port on the front panel of the
TRU under test. Verify that the TRU configurations for RX tests initial
setup are as listed in Table 11-1.
3. Connect the transmit output of the communications monitor to the
antenna input connector on the back of the TRU shelf for the antenna
under test. Connect the receive input of the communications monitor to
the sniffer port of the duplexer for the TRU under test. Use low loss
double shielded cables, RG-214 or equivalent. Figure 11-5 shows the
setup for the receive tests.
4. From the terminal, select the channel assigned to the DRU under test by
using the B command.
>B
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DRU receive tests 11-23
The DRU will request a channel number. Enter the channel number for the
frequency assigned to the DRU under test (1...799 or 990...1023). Refer to
Appendix A for the channel-to-frequency conversion information.
>xxxx
On a successful channel change, the Channel and Synth Lock fields will
be updated:
Channel: xxxx (DRU channel number indicated)
Synth Lock: YES (Sync Lock changes to ‘YES’)
5. On the communications monitor, set the receiver RF frequency to the
frequency corresponding to that of the DRU under test. For an IFR 1600,
by selecting the transmitter frequency, the receiver frequency will
automatically be set.
6. Proceed with the receive tests.
After performing a receive test on the A path of the receiver, perform the test
again on the B path. From the terminal, use the N command to change the
Antenna Path to ‘B’ and use the M command to select antenna port 4 for the
new receive path.
Note: Change the connection to the antenna input port 4 accordingly.
For sectored sites, perform also the following:
1. Use the N command to change the Antenna Path to ‘A’ and use the M
command to change the antenna ports to 2 and 5. Perform the receive
tests.
2. Use the N command to change the Antenna Path to ‘B’ and ensure that the
antenna ports are still 2 and 5. Perform the receive tests.
3. Use the N command to change the Antenna Path to ‘A’ and use the M
command to change the antenna ports to 3 and 6. Perform the receive
tests.
4. Use the N command to change the Antenna Path to ‘B’ and ensure that the
antenna ports are still 3 and 6. Perform the receive tests.
Note: Change the connection to the antenna input ports accordingly.
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
11-24
DRU tests
Figure 11-5
DRU receive tests setup (shelf/site service affecting)
Diversity Receive
Receive Multicoupler
Other TRU
Shelves
1:8
Splitter
Main
Transmit / Receive
Preselect
Filter
LNA
Duplexer
Other TRU
Shelves
1:8
Splitter
RX Bandpass
Filter
Receive Multicoupler
Preselect
Filter
LNA
TX Bandpass
Filter
Sniffer
TRU Shelf
TRU 1
TRU 2
MCPA Shelf
1:8 Splitters
4:1 Combiner
•••• • •
•••• • •
Tx
Combiner
MCPAs
TRU 7
VT100
TRU 8
Voice
Other TRU
Shelves
Data
To
MTX
Outputs
Data
Alarm
Control Unit
High Stability
MasterOscillator
AUTO
GEN
65W
IN MAX
SGL
STEP
RCVR
DUPLEX
FM/AM
1600S
POWER
FM /A M
DPLX
GO
STOP
SCOPE
ANLZ
PRINT
SCRN
SETUP
SHIFT
MTRS
HOLD
SCRN
STORE
RCL
MEMORY
AUX
MIC/ACC
EXT MOD
A P P L I
O END
SINAD
km
Enter
CE
DEL
EDIT
SQLCH
AUDIO
DEMOD
OUT
OUT
VΩ
VOL
DMM
COM
F2
F3
F4
F5
F6
IN/OUT
IN
IN
1KVDC/500V
AC MAX
Communications Monitor (IFR 1600)
411-2051-500
Draft
00.01
AMP
BER
F1
November 1999
SELECT
< v >
AF
GEN
1 6 0 0 S
DATASCROLL
MODE
65W
OUT MAX
INTENSIT
FIELD
DATAENTRY
RF
ANTENNA
TESTCONTROL
Integrated
Cellular
Remote
Module
(ICRM)
Alarm
Inputs
2 AMPS
MAX
^ v
< >
SCOPE
IN
200 VDC
MAX
IN/OUT
T/R
200W
MAX
DRU receive tests 11-25
Receive sensitivity test
The usable sensitivity of a receiver is the minimum level of a standard RF
signal required to produce 12 dB SINAD, C-message weighted. This test
ensures that the DRU meets the minimum requirement of receive sensitivity.
Step
Action
Observation
Ensure that the DRU configurations are as
listed in Table 11-1 for the Receive Sensitivity
test.
Note: SAT TX must be set to off in this test.
Use the G command to set SAT TX to off, if
necessary.
Use the J command to turn RF loopback on.
Use the R command to unmute TX RX audio.
Use the C command to turn PA carrier on.
Select the SINAD meter on the
communications monitor.
Using the communications monitor, apply a
-50 dBm on-channel RF signal modulated
with a 1 kHz tone at ±8 kHz deviation to the
DRU under test.
The SINAD reading should be much greater
than 12 dB.
Reduce the level of the RF signal until a 12
dB SINAD (C-message weighted) is
indicated on the SINAD meter. Check the RF
signal level on the communications monitor.
The RF signal level must be:
less than -105 dBm
Record the RF signal level on the test forms.
Loopback field shows: RF
Audio status field shows: TX RX
PA status field shows: ON
Receive and transmit audio line sensitivity test
This test ensures that both the receive audio signal level and the transmit
audio signal level of the DRU meet the required specifications in the AMPS
mode.
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
11-26
DRU tests
Step
Action
Observation
Ensure that the DRU configurations are as
listed in Table 11-1 for the Receive and
Transmit Audio Line Sensitivity test.
Note: SAT TX must be set to off in this test.
Use the G command to set SAT TX to off, if
necessary.
Use the J command to turn RF loopback on.
Use the R command to unmute TX RX audio.
Use the C command to turn PA carrier on.
Using the communications monitor, apply a
-60 dBm on-channel RF signal modulated
with a 1 kHz tone at ±2.9 kHz deviation to the
DRU under test.
Check the frequency deviation on the
transmit side of the DRU under test.
Record the deviation on the test forms.
Loopback field shows: RF
Audio status field shows: TX RX
PA status field shows: ON
The deviation must be:
between 2.60 kHz and 3.20 kHz.
Receive audio level test
This test ensures that the receive audio level of the DRU is compatible with
the Mobile Telephone Exchange (MTX) network in the AMPS mode. The
AMPS mode of the DRU is currently set to a default value of -18 dBm0,
corresponding to ±2.9 kHz deviation.
Step
Action
Observation
Ensure that the DRU configurations are as
listed in Table 11-1 for the RX Audio Level
test.
Use the C command to turn PA carrier off.
Use the J command to turn RF loopback off.
PA status field shows: OFF
Loopback field shows: OFF
Use the R command to turn on the RX audio.
>R
The DRU will prompt for the audio path:
Enter TX, RX, BOTH, or OFF
- continued -
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DRU receive tests 11-27
Step
Action
Observation
Enter the “RX” option to turn on the RX
audio.
>RX
Using the communications monitor, apply a
-60 dBm on-channel RF signal modulated
with a 1 kHz tone at ±2.9 kHz deviation to the
DRU under test.
This step is performed at the MTX.
The Audio status on the screen shows:
Audio: RX
From the MAP position or with a second
terminal logged into the switch the trunk that
is assigned to the DRU being tested, enter:
MAP Trunk Test Position is displayed. The
MAP screen will indicate the trunk member
selected and that the trunk is seized.
MAPCI;MTC;TRKS;TTP;POST (CLLI name)
(Trunk member number);LOSS
It will also indicate the tone received and the
level of the tone.
Check the level received at the switch as
displayed on the MAP position terminal.
Level must be:
between -17.0 dBm and -19.0 dBm.
Record the audio level on the test forms.
If the level is different from the site specific
Reverse audio level setting, repeat this test
after all the receive tests have been
completed. Set the level to the specific
operational level with the T command from
the interface terminal.
The receive audio level is shown on the
terminal screen as:
Audio Sens Rx: -18.0 (change this
level as required—a change of 1 dBm is
approximately a change of 0.27 kHz in
deviation)
10
Use the R command to turn off the RX audio.
>R
The DRU will prompt for the audio path:?
Enter TX, RX, BOTH, or OFF
11
Enter the “OFF” option to turn off the RX
audio.
>OFF
The Audio status on the screen shows:
Audio: off
- End -
RSSI test
The RSSI (Receive Signal Strength Intensity) is the RF signal strength used
by the DRU for signal monitoring. This test ensures that the RSSI
characteristics of the DRU under test are within specifications. Due to the
transceiver splitter and shelf cable losses, the RSSI reading is 11 dB lower
than the test signal applied.
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
11-28
DRU tests
Step
Action
Observation
Ensure that the DRU configurations are as
listed in Table 11-1 for the RSSI detect test.
Using the communications monitor, apply a
-60 dBm on-channel RF signal to the DRU
under test.
Use the P command to measure the RSSI
signal reading.
>P
The DRU will prompt for the measurement to
query:
Enter R, SAT, ST, or A
Enter the “R” option to query the RSSI
measurement.
>R
RSSI measurement is displayed and the
output message will show:
continuing Query..(hit return
to exit)
Check the RSSI measurement displayed on
the terminal screen and record it on the test
forms.
Requirement as shown in Table 11-2.
On the communications monitor, change the
RF signal input level as shown in Table 11-2
and record the RSSI measurement on the
test forms.
Requirement as shown in Table 11-2.
Table 11-2
RSSI characteristics
RSSI field specification: Nominal value ±5 dB.
RF signal input
RSSI measurement (in dBm)
(in dBm)
Maximum
Nominal
Minimum
-60.0
-66.0
-71.0
-76.0
-70.0
-76.0
-81.0
-86.0
-80.0
-86.0
-91.0
-96.0
-84.0
-90.0
-95.0
-100.0
-90.0
-96.0
-101.0
-106.0
-100.0
-106.0
-111.0
-116.0
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November 1999
DRU receive tests 11-29
RSSI offset calibration
The RSSI offset compensates for the overall receive path gain as measured
from the Receive Multicoupler (RMC) input to the TRU input. It compensates
for the cell site characteristics, such as the RMC and the receive path cabling.
Figure 11-6 shows the setup for the RSSI offset calibration.
Figure 11-6
RSSI offset setup
Diversity Receive
Receive Multicoupler
Other TRU
Shelves
1:8
Splitter
Main
Transmit / Receive
Preselect
Filter
LNA
Duplexer
RX Bandpass
Filter
Receive Multicoupler
Other TRU
Shelves
1:8
Splitter
Preselect
Filter
LNA
TX Bandpass
Filter
Sniffer
TRU Shelf
TRU 1
TRU 2
MCPA Shelf
1:8 Splitters
4:1 Combiner
•••• • •
•••• • •
Tx
Combiner
MCPAs
TRU 7
VT100
TRU 8
Voice
To
MTX
Alarm
Inputs
Outputs
Data
Alarm
Control Unit
High Stability
MasterOscillator
RF
GEN
AUTO
RCVR
SGL
STEP
65W
IN MAX
DUPLEX
FM/AM
1600S
FM /A M
POWER
DPLX
GO
AF
GEN
STOP
PRINT
SCRN
SETUP
SHIFT
MTRS
HOLD
SCRN
STORE
RCL
MEMORY
AUX
MIC/ACC
EXT MOD
O END
A P P L I
SINAD
km
Enter
CE
DEL
EDIT
SQLCH
AUDIO
DEMOD
OUT
OUT
VΩ
VOL
DMM
COM
AMP
BER
F1
F2
F3
F4
F5
F6
IN/OUT
IN
IN
SELECT
< v >
SCOPE
ANLZ
1 6 0 0 S
DATASCROLL
MODE
65W
OUT MAX
INTENSIT
FIELD
DATAENTRY
ANTENNA
TESTCONTROL
Integrated
Cellular
Remote
Module
(ICRM)
Other TRU
Shelves
Data
1KVDC/500V
AC MAX
2 AMPS
MAX
^ v
< >
SCOPE
T/R
200W
MAX
IN
200 VDC
MAX
IN/OUT
Communications Monitor (IFR 1600)
Note: IFR 1600 or any equivalent communications monitor can be used.
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
11-30
DRU tests
Step
Action
Observation
Put the DRU under test out of service at the
MTX.
Connect a low loss RF cable from the IFR output
Duplex 65W Max jack to the RMC input port A.
Connect the interface terminal to the RS-232
port on the front panel of the TRU under test.
Place the transceiver in Debug mode by pressing
the BREAK key.
On the Debug terminal type “SET FS ON” and
type press the  key.
The RF cable loss should be known and
will be used for calculation later.
If the command is not issued right-a-way then the
BREAK key may have to be typed again.
From the terminal, select the channel assigned
to the DRU under test by using the B command.
The DRU will request a channel number
( 1…799 or 991…1023 )
>B 
On a successful channel change, the
Channel and Synth Lock fields will
be updated:
Enter the channel number
Channel: xxxx (DRU channel
number indicated)
>XXXX
Synth Lock: YES (Sync Lock
changes to ‘YES’)
Ensure that the DRU configurations are as listed
in Table 11-3 for the RSSI characteristics test.
On the communications monitor, set the receiver
RF frequency to the frequency corresponding to
that of the TRU under test.
Using the communications monitor, apply a -60
dBm on-channel RF signal modulated with a
1kHz tone at ±2.9 kHz deviation to the DRU
under test.
10
Use the P command to measure the RSSI signal
reading.
The DRU will prompt for the
measurement to query:
>P 
Enter R, SAT, ST, or A
- continued -
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For an IFR 1600, by selecting the
transmitter frequency, the receiver
frequency will automatically be set.
DRU receive tests 11-31
Step
11
Action
Observation
Enter the “R” option to query the RSSI
measurement.
>R 
RSSI measurement is displayed and the
output message will show:
continuing Query..(hit return
to exit)
12
Check the RSSI measurement displayed on the
terminal screen and record it.
RX RSSI : - 57.0
RX SAT : N
RX ST : N
13
Use the O command to enter the value of dB1=
(input level - measured RSSI reading - RF cable
loss value) as the RSSI offset for path A, antenna
1.
Example:
Input level: -60dBm
Measured RSSI value: -57dBm
>O 
Typical RF cable loss: 1dB
then dB1 = -60 - (-57) - 1 = - 4dB
>A dB1 0 0
The RSSI offset should be kept to ±5 dB to keep
RSSI values between -130 dBm and -30 dBm.
Enter path (A or B) and three separate
dB values (± 0…100).
14
On the communications monitor, change the RF
signal level as shown in Table 11-4 and record
the RSSI measurement from the Debug terminal.
Requirement as shown in Table 11-4
15
Change the Antenna path with the N command
to path ‘B’ from the Debug terminal.
The DRU will request an antenna path
choice. Enter path ( A,B, or DIV ).
>N 
16
Enter the antenna path
Current Receiver path: B
>B 
Change the connection to the RMC input port B
accordingly.
17
Repeat step 7 to step 12 for the new antenna
path.
- continued -
Wireless Solutions
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Maintenance Manual
MTX08
11-32
DRU tests
Step
18
Action
Observation
Use the O command to enter the value of dB4 =
(input level - measured RSSI reading - RF cable
loss value) as the RSSI offset for path B, antenna
4.
Antenna Port 1 2 3 4 5 6
RSSI offset dB1 0 0 dB4 0 0
>O 
>B dB4 0 0
19
For sectored sites only, perform the remaining
portion of this procedure. OMNI cells will only
have two antennas and need not perform the
following steps in this procedure.
20
Change the Antenna path with the N command
to path ‘A’ from the Debug terminal.
The DRU will request an antenna path
choice. Enter path (A,B, or DIV).
>N 
21
Enter the antenna path.
Current Receiver path: A
>A 
22
Change the antenna ports to 2 and 5 with the M
command from the Debug terminal.
Enter a path A port number (1|2|3) and
a path B port number (4|5|6).
>M 
23
The DRU will request the port numbers.
Enter the antenna ports as two numbers
separated by a space
>2 5 
24
Repeat step 9 to step 18 for all radios being
tested.
Change the connection to the RMC input port
accordingly.
- continued -
411-2051-500
Draft
00.01
November 1999
When using the O command to enter
the RSSI offset for path A, antenna port
2 and path B, antenna port 5, make sure
to re-enter the RSSI offset for path A,
antenna port 1 (dB1) and for path B,
antenna port 4 (dB4). For example:
>O
>A DB1 DB2 0
where DB2 = RSSI offset for port 2 and
DB1 = previous value set for port 1.
>O
>B DB4 DB5 0
where DB5 = RSSI offset for port 5 and
DB4 = previous value set for port 4.
DRU receive tests 11-33
Step
25
Action
Observation
Change the Antenna path with the N command
to path ‘A’ from the Debug terminal.
The DRU will request an antenna path
choice. Enter path ( A,B, or DIV ).
>N 
26
Enter the antenna path.
Current Receiver path: A
>A 
27
Change the antenna ports to 2 and 5 with the M
command from the Debug terminal.
Enter a path A port number (1|2|3) and
a path B port number (4|5|6).
>M 
28
The DRU will request the port numbers.
Enter the antenna ports as two numbers
separated by a space.
>3 6 
29
Repeat step 9 to step 18 for all radios being
tested.
Change the connection to the RMC input port
accordingly.
When using the O command to enter
the RSSI offset for path A, antenna port
3 and path B, antenna port 6, make sure
to re-enter the RSSI offset for path A,
antenna ports 1, 2 (dB1 and dB2) and
for path B, antenna ports 4, 5 (dB4 and
dB5). For example:
>O
>A DB1 DB2 DB3
where DB3 = RSSI offset for port 3,
DB2 = previous value set for port 2, and
DB1 = previous value set for port 1.
>O
>B DB4 DB5 DB6
where DB6 = RSSI offset for port 6,
DB5 = previous value set for port 5, and
DB4 = previous value set for port 4.
- End -
Table 11-3 shows the DRU configuration for RSSI characteristics and Table
11-4 shows the RSSI measurement characteristics.
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
11-34
DRU tests
Table 11-3
DRU configuration for RSSI characteristics
TRU Configurations
TX/RX Audio
SAT TX
Tone
Gen
Loop
back
Compander
WideBand
Data
Detect
RSSI
Audio
Status
Audio
Sens
Command
RSSI
detect
OFF
OFF
OFF
ON
OFF
RSSI
OFF
-18.0
Table 11-4
RSSI measurement characteristics
RF signal input
(in dBm)
RSSI measurement (in dBm)
Maximum
Nominal
Minimum
-60
-57
-60
-63
-70
-67
-70
-73
-80
-77
-80
-83
-84
-81
-84
-87
-90
-87
-90
-93
-100
-97
-100
-103
RSSI field specification: Nominal value ±3 dB
411-2051-500
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00.01
November 1999
DRU receive tests 11-35
SAT detect test
This test ensures that the DRU meets the minimum requirement of detecting a
Supervisory Audio Tone signal.
Step
Action
Observation
Ensure that the DRU configurations are as
listed in Table 11-1 for the SAT detect test.
Use the P command to query the SAT signal.
>P
The DRU will prompt for the signal to query:
Enter R, SAT, ST, or A
Enter the “SAT” option to query the SAT
signal.
>SAT
The RX SAT status shows: N
The output message shows:
continuing Query..(hit return
to exit)
Using the communications monitor, apply a
-90 dBm on-channel RF signal modulated
with a 5970 Hz tone at ±1.8 kHz deviation to
the DRU under test.
The RX SAT status on the screen should
show:
RX SAT: 0
Reduce the level of the RF signal until a “N”
is indicated at the RX SAT status on the
screen.
The RX SAT status on the screen shows:
RX SAT: N
Check the RF signal level on the
communications monitor.
The RF signal level must be:
less than -105 dBm
Record the RF signal level on the test forms.
Using the communications monitor, apply a
-90 dBm on-channel RF signal modulated
with a 6000 Hz tone at ±1.8 kHz deviation to
the DRU under test.
The RX SAT status on the screen should
show:
RX SAT: 1
Reduce the level of the RF signal until a “N”
is indicated at the RX SAT status on the
screen.
The RX SAT status on the screen shows:
RX SAT: N
10
Check the RF signal level on the
communications monitor.
The RF signal level must be:
less than -105 dBm
11
Record the RF signal level on the test forms.
12
Using the communications monitor, apply a 90 dBm on-channel RF signal modulated
with a 6030 Hz tone at ±1.8 kHz deviation to
the DRU under test.
The RX SAT status on the screen should
show:
RX SAT: 2
- continued -
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
11-36
DRU tests
Step
Action
Observation
13
Reduce the level of the RF signal until a “N”
is indicated at the RX SAT status on the
screen.
The RX SAT status on the screen shows:
RX SAT: N
14
Check the RF signal level on the
communications monitor.
The RF signal level must be:
less than -105 dBm
15
Record the RF signal level on the test forms.
- End -
ST detect test
This test ensures that the DRU meets the minimum requirement of detecting a
Signaling Tone signal.
Step
Action
Observation
Ensure that the DRU configurations are as
listed in Table 11-1 for the ST detect test.
Use the P command to query the ST signal.
>P
The DRU will prompt for the signal to query:
Enter R, SAT, ST, or A
Enter the “ST” option to query the ST signal.
>ST
The RX ST status shows: N
The output message shows:
continuing Query..(hit return
to exit)
Using the communications monitor, apply a
-90 dBm on-channel RF signal modulated
with a 10 kHz tone at ±7.2 kHz deviation to
the DRU under test.
The RX ST status on the screen should
show:
RX ST: Y
Reduce the level of the RF signal until a “N”
is indicated at the RX ST status on the
terminal screen.
The RX ST status on the screen shows:
RX ST: N
Check the RF signal level on the
communications monitor.
The RF signal level must be:
less than -105 dBm
Record the RF signal level on the test forms.
Press the “Return” key from the terminal to
discontinue the measurement.
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The output message will show:
Query Status is OFF
DRU receive tests 11-37
Setting RX audio level to site operational level
After the receive tests, ensure that the audio level recorded in the Receive
Audio Level test is the same as the site specific operational level. If the two
levels are different, perform the Receive Audio Level test and change the
receive audio level to the site specific operational level by using the T
command.
Set the RX audio sensitivity with the T command.
>T
The DRU will prompt as follows:
Enter TX or RX and a decimal dBm value (TX:-28...
-10);(RX:-28...-16)
Enter:
>RX -xx.x
(change this value as required to obtain the operational
receive audio level)
Note: A change of 1 dBm is approximately a change of -0.27 kHz
deviation.
The Audio Sens RX status on the screen will show:
Audio Sens Rx: -xx.x (site specific operational level)
Use the Y command to perform a reset on the DRU after the tests.
>Y
At the command prompt, perform a warm reset on the DRU by entering:
>W
The DRU will return to its normal working condition after the reset.
Disconnect the interface terminal from the DRU.
At the MTX, put the DRU back to service.
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
11-38
DRU tests
Transmit RF output power test
This test measures the power output of the TRU, the MCPA and the transmit
path insertion loss. Since it interrupts service for the shelf and potentially
(depending on system configuration) the whole site, it should be used only
when a problem is suspected and then only during a low traffic period.
WARNING
RF radiation hazard
Do NOT disconnect any RF cables when transmitters are on.
CAUTION
Service interruption
The service of the shelf/site under test will be affected.
Perform the tests during low traffic period.
This section describes the Transmit RF output power test that can be
performed on the DualMode Radio Unit (DRU). The Transmit RF output
power test setup procedure must be performed before the test.
Transmit RF output power test setup procedure
1. At the MTX, busy and off-line the TRU under test.
2. Connect the interface terminal to the RS-232 port on the front panel of the
TRU under test. Verify that the DRU configurations for TRU power test
initial setup are as listed in Table 11-1.
Note: Ensure that the TRU transmitter is off.
3. Connect the receive input of the communications monitor to the antenna
port of the duplexer. Use a low loss double shielded cable, RG-214 or
equivalent. Figure 11-7 shows the connection setup for the RF output
power test.
Note: If you do not want to interrupt service, connect to the monitor port
of the duplexer instead. The measurement may not be as accurate because
the level is approximately 50 dB down with a tolerance of up to ±5 dB.
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Transmit RF output power test
11-39
Figure 11-7
Transmit RF output power test setup
Diversity Receive
Main
Transmit / Receive
Receive Multicoupler
Other TRU
Shelves
1:8
Splitter
Preselect
Filter
LNA
Duplexer
RX Bandpass
Filter
Receive Multicoupler
Other TRU
Shelves
1:8
Splitter
Preselect
Filter
LNA
TX Bandpass
Filter
Sniffer
TRU Shelf
TRU 1
TRU 2
MCPA Shelf
4:1 Combiner
1:8 Splitters
•••• • •
•••• • •
Tx
Combiner
MCPAs
TRU 7
VT100
TRU 8
Voice
To
MTX
Inputs
Outputs
Data
Alarm
Control Unit
High Stability
MasterOscillator
AUTO
GEN
65W
IN MAX
SGL
STEP
RCVR
DUPLEX
FM/AM
1600S
POWER
FM /A M
DPLX
GO
AF
GEN
STOP
PRINT
SCRN
SETUP
SHIFT
MTRS
HOLD
SCRN
STORE
RCL
MEMORY
AUX
MIC/ACC EXT MOD
A P P L I
O END
SINAD
km
Enter
CE
DEL
EDIT
SQLCH
AUDIO
DEMOD
OUT
OUT
VΩ
VOL
DMM
COM
AMP
BER
F1
F2
F3
F4
F5
F6
IN/OUT
IN
IN
SELECT
SCOPE
ANLZ
1 6 0 0 S
DATASCROLL
MODE
65W
OUT MAX
INTENSIT
FIELD
DATAENTRY
RF
ANTENNA
TESTCONTROL
Integrated
Cellular
Remote
Module
(ICRM)
Alarm
Other TRU
Shelves
Data
1KVDC/500V
AC MAX
2 AMPS
MAX
^ v
< >
SCOPE
T/R
200W
MAX
IN
200 VDC
MAX
IN/OUT
Communications Monitor (IFR 1600)
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
11-40
DRU tests
4. From the terminal, select the channel assigned to the TRU under test by
using the B command.
>B
The TRU will request a channel number. Enter the channel number for the
frequency assigned to the DRU under test (1...799 or 990...1023). Refer to
Appendix A for the channel-to-frequency conversion information.
>xxxx
On a successful channel change, the Channel and Synth Lock fields will
be updated:
Channel: xxxx (DRU channel number indicated)
Synth Lock: YES (Sync Lock changes to ‘YES’)
5. On the communications monitor, set the transmit RF frequency to the
frequency corresponding to that of the TRU under test.
6. Proceed with the RF output power test.
Requirements on the Transmit RF output power test
When performing the Transmit RF output power test, make sure that power
initialization has been performed (refer to Chapter 1). Also, take into account
the number of channels supported by the MCPA and the component (cable,
duplexer) loss along the transmit path.
Table 11-5 lists the maximum per-channel power levels per carrier measured
at the output port of the MCPA shelf for different channel counts and MCPA
combinations in a DualMode 800 Enclosure. The power per channel calculation
is based on the following assumption:
• output of TRU at +15 dBm and nominal gain at -12 dB, giving an overall
TRU output of +27 dBm
Table 11-5
DualMode 800 Enclosure per-carrier power level at the output port of the MCPA shelf
1 MCPA module
2 MCPA modules
8 channels
12.50 W
25.00 W
16 channels
6.25 W
12.50 W
24 channels
4.17 W
8.33 W
32 channels
3.12 W
6.25 W
Figure 11-8 shows the per-channel transmit power level at the output of each
component for a 24-channel cell/sector using two MCPA modules.
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Transmit RF output power test
11-41
Figure 11-8
Transmit power level of a DualMode 800 Enclosure with 24-channel per cell/sector using two
MCPA modules
-1.34 dBm
+5.75 dBm
(-21 dB)
(-0.25 dB)
8:1
+53.1 dB
(Notes 3
and 4)
(-6.25 dB)
(-0.84 dB)
4:1
(-0.7 dB)
(-0.1 dB)
(-0.2 dB)
(-0.25 dB)
LMR-400
MCPA
Combiner
Duplexer
TX Combiner
(at the back of
TRU shelf)
+37.8 dBm
(6.0 watts)
(Note 5)
(-0.4 dB)
Antenna panel
Lightning arrestor
+27 dBm
Transmit Receive Unit
(TRU)
+38.3 dBm
(6.7 watts)
(Note 5)
+39.2 dBm
(8.3 watts)
TX/RX
Antenna
Notes: 1. Typical gains and losses shown — not maximum or minimum.
2. Per-channel TX power level shown with TRU output at +27 dBm.
3. MCPA gain includes the MCPA module gain and the splitter,
combiner, and cable losses within the MCPA shelf.
4. Additional loss due to amplitude/phase imbalance (typically 0 to
0.5 dB) not shown.
5. Output power at duplexer antenna port may be 0 to 0.5 dB lower
due to amplidtue/phase imbalance.
Transmit RF output power test
This test ensures that the output power level of the TRU, the MCPA, and the
transmit path loss are within specifications.
Step
Action
Observation
Ensure that the TRU configurations are as
listed in Table 11-1 for the Power Output test.
Turn on the TRU transmitter with the C
command
>C
The PA status should be as follows:
PA: on
TxPwrIndex: 0
TxPwrStep: 4.00
MaxTxPwr: 15.00
Measure the output power of the channel on
the communications monitor.
Power level should be within site
specifications (refer to Table 11-5).
Record the power level on the test forms.
Turn off the TRU transmitter with the C
command.
>C
Wireless Solutions
The PA status on the screen will show:
PA: off
DualMode 800 Enclosure
Maintenance Manual
MTX08
11-42
DRU tests
Setting TRU power step size and Max power to site operational level
After the output power tests, ensure that the TRU power step size and the
TRU Max power are set back to the site specific operational level. Check the
TRU power step size setting previously defined for the site. Set the TRU
power step size setting to the site specific operational step size setting with
the U command from the interface terminal.
Set the TRU Power Step with the U command.
>U
The TRU will prompt for a power step size:
1..4
Enter:
>x.xx
(change this value as required to obtain the operational power
step size)
The power step size on the screen will show:
TxPwrStep: x.xx (site specific power step size)
Check the TRU Max power setting previously defined for the site. Set the
TRU output power to the site specific operational power with the F command
from the interface terminal.
Set the TRU Max Power with the F command.
>F
The TRU will prompt for a power level:
-1.0...27.0 in dBm
Enter:
>xx.x
(change this value as required to obtain the operational
output power level)
The MaxTxPwr status on the screen will show:
MaxTxPwr: xx.xx (site specific operational level)
Use the Y command to perform a reset on the TRU after the tests.
>Y
At the command prompt, perform a warm reset on the TRU by entering:
>W
The TRU will return to its normal working condition after the reset.
Disconnect the interface terminal from the TRU.
At the MTX, put the TRU back to service.
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DRU digital tests
11-43
DRU digital tests
This section describes the digital tests that can be performed on the
DualMode Radio Unit (DRU) and other system components to verify TDMA
operation. A DualMode Radio Unit Monitor (DRUM) is required to perform
the Bit Error Rate test and a TDMA or a Dual Mode cellular phone is required
to perform the TDMA call test. The test requires operator commands initiated
at the DRU, DRUM and MTX.
Digital test considerations
A 2-way splitter located on the DRUM is used to combine the bi-directional
link from the duplexer and from the DualMode Cell Site Monitor (DCSM) to
give a single interface for both. The 2-way splitter connects to either an
antenna or a duplexer monitor port to provide an RF interface to the DRUs.
The NTAX40CA DRUM uses the antenna connection; while the NTAX40DA
DRUM uses the duplexer monitor port.
A Bit Error Rate loopback test is initiated at the MTX on an in-service
(INSV) DRU that has been taken out of call processing mode by the test being
run. The test is carried out over the entire transmission loop from the MTX
Digital Signal Processing Module (DSPM) through a DRU to the DRUM.
Measurements of a Pseudo-Random Bit Stream are taken in both the near-tofar and far-to-near directions. Bi-directional transmit and receive tests are
performed; uni-directional tests are automatically performed only if the bidirectional test fails. Figure 11-9 shows the digital loopback paths.
Note: The TRU3 does not support this loopback test method. It only
supports the on-site BER test method.
Figure 11-9
Digital loopback paths
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
11-44
DRU tests
Bit error rate test at the MTX switch
Bit Error Rate (BER) is defined as the ratio of erroneous bits to the total
number of received bits in a transmission system. Typically, BER tests are
performed on suspect equipment. However, external factors such as strong
electromagnetic conditions, multi-path effects and environmental conditions
like lightning may also cause high BER levels and need to be considered
when a BER test fails.
In the outbound direction (from Digital Signal Processing Module to
DualMode Radio Unit), the BER test generates a pseudo-random bit stream
(PRBS) onto the selected TDMA time slot. In the inbound direction, the BER
test expects to receive the same bit pattern. After a short self-synchronization
time period, the bit error rate is measured.
Note: The TRU3 does not support this test (that is, the MRBT test).
Step
Action
Observation
Ensure that the following tables have been
datafilled.
Tuples shown are examples only. They may
look different on your screen.
Table CTTPARMS
Table CTTPARMS has a tuple for the cell
under test and range TESTNAME says
“MRBT”
TABLE CTTPARMS
PARMNAME
TSTPARMS
--------------------------------------------MRBT
Table PMLOADS
MRVT MRBT 6000000 6000 6000 NOSTOP
TABLE: PMLOADS
LOADNAME
DEVICE
----------------------------------------------DM2_AE25
Table TERMATTR
D000PMLOADS
TABLE: TERMATTR
ATTRIBUTE PEC_CODE
LOAD PADPEC CSPM HWTYPE
---------------------------------------------AE25
Table CSMINV
AX40DA DM2_AE25
NOPAD ICRM
DRUM
TABLE: CSMINV
CSMKEY
MIN SERNO TERMATTR CARD PORT ALARMPT
----------------------------------------------495 0 214 234 0095 142 571 AE25 8
Ensure that the DRUM is in service.
>MAPCI;MTC;MTX
>POST CELL {cell #};CTU {ctu #}
Verify that the DRUM indicates INSV.
- continued -
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15
DRU digital tests
Step
Action
11-45
Observation
Enter the log reporting system and setup a
device to report MTX 230 logs.
>LOGUTIL
>ADDREP  MTX 230
>STARTDEV 
>QUIT
LOGUTIL
1 report added
 started
Enter the DRU POST level:
>POST VCH ALL or POST VCH {no.}
Post position is displayed on the MAP
terminal.
Perform the bit error rate test on the DRU
from the MTX.
>TST MRBT MRBT 2
Test submitted, watch LOGs for results.
Review the results on the Log device started
earlier. A sample of the log is displayed right.
Note: MRBT test on the first Voice channel
must be completed before going to the next
Voice channel.
Log MTX 230 printed on the log device.
MTX230 OCT23 12:52:14 9408 INFO CTE Test
results
TESTNAME: MRBT
CELL = 495
VCH 6 DRU
CTTPARMS: MRBT
PRTN = Z
TDMA CHANNEL: 2
RESULTS: TEST STAGE: TX
STATUS: PASSED
REASON:
# BITS TRANSMITTED: 6000000
# BIT ERRORS: 9
BER: 9.0*10E-6
# RESYNCS: 0
The bit error rate must be less than 0.6% or
less than 36000 errors in 6000000.
Record the results on test forms.
Test the next DRU by typing:
>NEXT or POST VCH (no.)
Repeat steps 5 to 7 for testing the next DRU.
10
When tests are complete, turn logs off by
entering:
>LOGUTIL
>STOPDEV 
>DELREP  MTX 230
>QUIT
The next DRU will be posted.
LOGUTIL
Device Stopped
1 Report deleted
- End -
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
11-46
DRU tests
Bit error rate test at the cell site
The BER test performed at the cell site verifies the BER performance of the
DRU and the paths between the DRU and the communications monitor. It
does not verify the BER performance of the links between the DRU and the
DSPM.
In the inbound (RX) direction (from the communications monitor to the
TRU), the communications monitor generates a pseudo-random bit stream
(PRBS) onto the selected TDMA time slot of the TRU. This PRBS is looped
from the receiver of the TRU to the transmitter of the TRU and sent back to
the communications monitor. In the outbound (TX) direction, the
communications monitor expects to receive the same bit pattern. After a short
self-synchronization time period, the bit error rate is measured.
Service impacts
This BER test causes a reduction in the receive performance of the shelf
containing the TRU under test because of the loss of receive diversity.
The TRU transmit and receive tests must be performed before the BER test to
verify the TRU’s transmit and receive paths. This is because the TRU uses an
RF loopback to access the base-band receive signal. Failure to verify the
TRU transmit and receive paths may result in invalid test data.
CAUTION
Service interruption
The service of the shelf housing the TRU under test will be
affected. Perform the tests during low traffic period.
Figure 11-10 shows the BER test setup at the cell site
Note: The sniffer port is at a level of -50 dBm lower than the level at the
antenna port of the duplexer. Make sure that this level meets the minimum
input level requirement of your communications monitor. If the level is
lower than the minimum requirement, connect the input of the
communications monitor to the antenna port of the duplexer. In this case,
the entire cell/sector will be out of service for the duration of the test.
WARNING
RF radiation hazard
Do NOT disconnect any RF cables when transmitters are on.
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DRU digital tests
11-47
Figure 11-10
BER test setup at the cell site
Diversity Receive
Receive Multicoupler
Other TRU
Shelves
1:8
Splitter
Main
Transmit / Receive
Preselect
Filter
LNA
Duplexer
RX Bandpass
Filter
Receive Multicoupler
Other TRU
Shelves
1:8
Splitter
Preselect
Filter
LNA
TX Bandpass
Filter
Sniffer
TRU Shelf
TRU 1
TRU 2
MCPA Shelf
1:8 Splitters
4:1 Combiner
•••• • •
•••• • •
Tx
Combiner
MCPAs
TRU 7
VT100
TRU 8
Voice
To
MTX
Alarm
Inputs
Outputs
Data
Alarm
Control Unit
High Stability
MasterOscillator
RF
GEN
AUTO
RCVR
SGL
STEP
65W
IN MAX
DUPLEX
FM/AM
1600S
POWER
FM /A M
DPLX
STOP
PRINT
SCRN
MTRS
HOLD
SCRN
STORE
1 6 0 0 S
MIC/ACC EXT MOD
O END
A P P L I
SINAD
SHIFT
RCL
MEMORY
AUX
SETUP
CE
DEL
EDIT
AUDIO
DEMOD
OUT
OUT
SQLCH
VΩ
Enter
VOL
DMM
COM
AMP
BER
F1
F2
F3
F4
F5
F6
IN/OUT
IN
IN
SELECT
< v >
GO
AF
GEN
SCOPE
ANLZ
DATASCROLL
MODE
65W
OUT MAX
INTENSIT
FIELD
DATAENTRY
ANTENNA
TESTCONTROL
Integrated
Cellular
Remote
Module
(ICRM)
Other TRU
Shelves
Data
1KVDC/500V
AC MAX
2 AMPS
MAX
^ v
< >
SCOPE
T/R
200W
MAX
IN
200 VDC
MAX
IN/OUT
Communications Monitor (IFR 1900)
Note: This test works with an IFR1900 or HP8935 communications
monitor with the required software. It does not work with an older IFR or
HP model.
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
11-48
DRU tests
Step
Action
Observation
Connect the test setup as shown in Figure
11-10.
Set up the communications monitor for BER
measurement.
Refer to the user’s manual of your
communications monitor for the setup
procedure.
Note: Set the output of the communications
monitor to -110 dBm.
Set up the TRU as listed below:
>set LT off
>set PATYPE NONE
>set PERS TTC
>set CHANNEL xxxx (the B command)
>set TXPOWIDX 0 (the E command)
>set BCH loop off (the J command)
>set RF loop on (the J command)
>set PA on (the C command)
Note: You can also use the Fullscreen mode
to set up the TRU.
Press the appropriate key (for example: GO,
START) on the communications monitor to
begin the BER test.
The bit error rate must be less than 3% when
output level of the communications monitor is
at -110 dBm.
Record the test result when the PRBS (Total
bits generated) reaches around 1,000,000
bits.
If BER is out of specifications, replace the
TRU and perform the test again. If problem
persists, perform troubleshooting.
Perform the test on the other timeslots of the
TRU.
Use the Set Slot (H) command to change the
slots. Remember to change the settings on
the communications monitor accordingly.
Record the test result.
Normalize the system.
The A-side splitter on the TRU shelf is
connected back to the RMC output.
Connect the output of the communications
monitor to the B-side splitter on the TRU
shelf and perform the test (Steps 2 to 5) on
the B-side receiver of the TRU.
Record the test result.
After completing the test on the B-side
receiver of the TRU, normalize the system.
The B-side splitter on the TRU shelf is
connected back to the RMC output.
- End -
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DRU digital tests
11-49
TDMA modulation accuracy test
The TDMA modulation accuracy test measures the π/4 DQPSK modulation
of the signals received from the TRU. To perform this test, you must use a test
equipment that can measure TDMA modulation accuracy, such as the
IFR1600 with TDMA software.
Note: The IFR1600 is used as a reference in this testing procedure. If you
are using another model of test equipment, refer to the user manual of that
equipment for the appropriate test setup and display.
Step
Action
Observation
Connect a VT100 (or equivalent) terminal to
the RS-232 port on the front panel of the
TRU under test.
By pressing the “Break” key on the terminal
keyboard, you can access the command line
mode.
At the prompt (>), type:
>set lt off
Type:
>set pa off
The terminal will display (the TRU2 display is
shown as an example):
TRU Terminal Interface
(C) Copyright 1990,1991 Bell
Northern Research, Inc.
The TRU transmitter is turned off.
This step ensures that the TRU is not
radiating RF power when disconnecting the
RF cable.
Connect the TRU under test through the
sniffer port of the duplexer to the input
connector of the test equipment (the T/R port
on the IFR1600).
Select the Modulation Accuracy function on
the test equipment.
The Modulation Accuracy display screen on
the IFR1600 shows:
For the IFR1600:
(i) select the ‘RCVR’ function with the IFR
MODE key
(ii) press the ‘F5’ key that is labeled ‘Sp Tst’
(iii) select ‘MODULATION ACCURACY’ by
pressing the ‘4’ key from the Data Entry
Keys.
MODULATION ACCURACY
CHANNEL
I/Q OFFSET=
FREQUENCY ERROR=
RMS PHASE ERROR=
RMS MAGNITUDE ERROR=
RMS ERROR VECTOR MAGNITUDE=
- continued -
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
11-50
DRU tests
Step
Action
Observation
On the test equipment, enter the channel
number that is to be tested.
For the IFR1600:
(i) use the Data Entry Keys to input the
channel
(ii) press the green ‘ENTER’ key to enter the
input.
On the terminal, type:
>set pers ttc
Personality configuration was successful.
The personality of the TRU changes to a
TDMA Traffic Channel.
Type:
>set channel xxxx
Channel change was successful.
“xxxx” is the channel number of the TRU
under test.
10
Type:
>set txpowidx 0
The channel of the TRU changes to the
desired number.
PA power change was successful.
The power index of the TRU changes to 0.
11
Type:
>set maxtxpow 15
Set Max power (input value and
value used): 15.0 15.0
PA Max Power (dBm): 15.0
The output power of the TRU changes to
27.0 dBm.
12
Type:
>run inject to dsp 1 52 b6 0 0
13
Type:
>set pa on
Status change was successful.
The TRU transmitter is turned on.
- continued -
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DRU digital tests
Step
14
Action
11-51
Observation
Start the test by pressing the F1 function key
labeled “RUN” on the IFR1600. (For the
operation of other types of test equipment,
refer to their user manuals.)
The following will be measured in this test:
I/Q Offset—20 x Log of the I/Q offset
magnitude indicates the amount of carrier
feed through.
Frequency Error—Difference between the
received carrier frequency and the ideal
carrier frequency.
RMS Phase Error—RMS value of the
absolute phase errors.
RMS Magnitude Error—RMS value of the
difference between the ideal magnitude and
the received magnitude.
RMS Error Vector Magnitude—RMS value of
the magnitude of the error vectors.
15
Repeat Step 14 ten times and take the
average over the ten readings.
16
Once the test is completed, a π/4 DQPSK I/Q
plot can be performed by pressing the “F2”
function key on the IFR1600.
Test results will be displayed as follows:
MODULATION ACCURACY
I/Q OFFSET= (less than -30 dBc)
FREQUENCY ERROR= (+220 to -220
Hz)
RMS PHASE ERROR= (N/A)
RMS MAGNITUDE ERROR= (N/A)
RMS ERROR VECTOR MAGNITUDE= (less
than 12.5%)
Note: For more information on plotting
results, see the IFR1600 dual mode cellular
system analyzer manual. (For the operation
of other types of test equipment, refer to their
user manuals.)
17
Type:
>set pa off
Status change was successful.
The TRU transmitter is turned off.
18
Disconnect the test equipment from the
sniffer port of the duplexer.
19
Type:
>execute reset
20
Disconnect the terminal interface from the
TRU.
This command removes the run inject
command and resets the TRU.
- End -
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
11-52
DRU tests
TDMA call test
This test is used to verify the origination and termination of a digital call
through the DRU under test.
Step
Action
Originate a call with a TDMA cellular phone.
It may be necessary to make several calls
before the system selects the DRU under
test.
Check that the audio quality of the call is
good.
Terminate the call.
411-2051-500
Draft
00.01
Observation
The LED display on the front panel of the
TRU will indicate that the DRU is selected.
The LED display on the front panel of the
TRU should indicate that the call is
terminated by returning the DRU to the idle
state.
November 1999
12-1
Enclosure maintenance
12
Field Replaceable Unit (FRU)
The components of a DualMode 800 Enclosure are not designed to be
repaired in the field. The only maintenance that can be performed is to replace
components or the Field Replaceable Units (FRU). Refer to the DualMode
800 Enclosure Troubleshooting Guide, 411-2051-900, to determine if a
component needs to be replaced. Table 12-1 lists all the FRUs and their
Product Engineering Codes (PEC) or Common Product Codes (CPC).
Note 1: L/L — Like for Like (Advance replacement or mail-in)
M/O — Merchandise Order/Consumable items (items that are
disposable and not repairable, such as light bulbs, fuses, filters)
Note 2: For L/L units, please contact your Nortel Networks Customer
Service Operations (CSO) office for replacement.
For M/O items, please contact Nortel Networks Wireless Supply and
Demand office or purchase the items locally if available.
Note 3: Cables are M/O items. They are not listed in this table. If you
need to replace a cable, check the PEC/CPC on the cable or contact Nortel
Networks Wireless Supply and Demand office.
Table 12-1
DualMode Urban field replaceable units
Description
PEC/CPC
Service
Rack Interface Panel (RIP) 1
NTL102AA
L/L
Rack Interface Panel (RIP) 2
NTL102AB
L/L
Rack Interface Panel (RIP) 3
NTL102AC
L/L
Circuit Breaker 10A
A0666060
M/O
Circuit Breaker 15A
A0666061
M/O
Circuit Breaker 50A
A0734636
M/O
Wireless Solutions
DualMode 800 Enclosure
Remark
Maintenance Manual
MTX08
12-2
Enclosure maintenance
Table 12-1
DualMode Urban field replaceable units (continued)
Description
PEC/CPC
Service
Circuit Breaker 120A
A0381990
M/O
Power Filter PCP
NTFB14AA
M/O
Duplexer, B Band
NTFC04AC
L/L
Duplexer, Full Band
NTFC04AD
L/L
Termination, 50-ohm
A0689593
M/O
Multi-Channel Power Amplifier (MCPA) Shelf
NTL107AC
L/L
NTL107AE
L/L
MCPA Module 110 Watt
NTL107AA
L/L
MCPA Initialization Software
NTFC07BC
L/L
Transmit Receive Unit (TRU) Shelf
NTFC05AG
L/L
Fan unit module
NTFB24AA
M/O
Fan module PCP
NTFB25AA
M/O
Transmit combiner 800 module
NTLA7106
M/O
TRU2
NTAX98AA
L/L
TRU3
NTAW99AA
L/L
Alarm Control Unit (ACU)
NT3P89CA
L/L
Output Contact card
NT3P20EA
L/L
Enhanced ACU Input card
NT3P20FB
L/L
High Stability Master Oscillator (HSMO)
NT3P89DA
L/L
DualMode Cell Site Monitor (DCSM)
NT3P70BC
L/L
Enhanced Receive Multicoupler (ERMC) — 8
ports
NT3P20XD
L/L
ERMC 8 Port Expansion Kit
NT3P20XB
L/L
ERMC — 16 ports
NT3P20XC
L/L
Integrated Cellular Remote Module (ICRM)
shelf
NTTG86AA
L/L
4:1 Combiner assembly
411-2051-500
Draft
00.01
November 1999
Remark
For NT3P20XD to expand
to 16 ports
Field Replaceable Unit (FRU)
12-3
Table 12-1
DualMode Urban field replaceable units (continued)
Description
PEC/CPC
Service
Remote Module Digital Port (RMDP) card
NT8X47CA
L/L
Remote Module Time Switch Controller
(RMTC)
NTAX88CA
L/L
For ICRMO+ and ICRM+
DS1 Interface card
NT6X50AB
L/L
Not applicable to ICRMO+
PCM30 (E1) Interface card
NT6X27BB
L/L
For ICRMO+
Power convertor
NT2X70CA
L/L
Alarm (RMAC) card
NTAX92AA
L/L
Located in Remote Module
Frame Supervisor (RMFS)
TCM-RS232 Conversion (RMTP) card
NTAX91AA
L/L
Located in RMFS
Rectifier Shelf
NTL106AB
L/L
Rectifier Module
NTL106AA
L/L
Power Control Shelf
NTTF60AA
L/L
Battery Compensation Module
NTTF60AB
L/L
Low Voltage Disconnect card
NTTF60AC
L/L
Channel Service Unit (CSU) 4-Slot Shelf
NTLA7011
L/L
Shelf Interface Unit (SIU) for 4-Slot Shelf
NTLA7013
L/L
T-Smart T1 SIU card
A0383869
L/L
E-Smart E1 SIU card
NTLA7012
L/L
NTTF12AB
L/L
Solar Shield Kit
Wireless Solutions
DualMode 800 Enclosure
Remark
Maintenance Manual
MTX08
12-4
Enclosure maintenance
General precautions
There are some general precautions that need to be aware of when replacing
components.
RF radiation hazard
Radio Frequency (RF) radiation is hazardous to anyone working in the cell
site. Before removing any RF cable, ensure that the related power amplifier is
turned off. All RF cables should be connected properly and all unused RF
ports should be terminated with an appropriate terminator.
CAUTION
Do NOT disconnect any RF cables when transmitters are on.
Electrostatic Discharge (ESD) control
When handling any circuit board, take care to prevent damage from static
discharge. Observe the following rules.
1. To prevent electrostatic discharge, do not attach ribbon cables to circuit
boards until the circuit boards are in place.
2. To dissipate any static charge, wear a wrist strap in contact with the skin.
3. Connect the wrist strap ground cord to the equipment cabinet ground.
CAUTION
Do not let the circuit board come into contact with clothing at
any time, as the grounding strap cannot dissipate static charges
on fabrics.
Cable/connector identification
Label all cables and connectors before disconnecting them from any cell site
equipment. This will minimize the time required for tracing the connections
and also reduce the possibility of incorrect connections.
411-2051-500
Draft
00.01
November 1999
Replacing faulty common equipment (CE) units
12-5
Replacing faulty common equipment (CE) units
CAUTION
Service interruption
The enclosure may be completely out-of-service when a unit
such as the RIP, the HSMO, or the ICRM is removed. Replace
these units during low traffic period.
For the replacement of a common equipment unit, use the following procedure:
1. At the MTX, put the cell site or the unit out-of-service as required.
2. If replacing the Rack Interface Panel (RIP), switch off the supply to
the bay at the rectifier. If replacing other units, switch off both the ‘A’
and ‘B’ circuit breakers to that unit at the RIP.
CAUTION
Hot insertion replacement may cause damage to the
components and a possible service interruption.
3. Label and disconnect the cables/connectors connected to the unit.
4. Remove the screws mounting the unit to the bay and then remove the unit
from the bay.
5. Replace a new or known working unit on to the bay and fix it with the
mounting screws.
6. Reconnect the cables/connectors to their appropriate locations. Ensure
that they are connected properly.
7. Switch on the circuit breakers to the unit at the RIP or switch on the
power supply to the RIP at the rectifier.
Note: For the DCSM, program the mobile unit of the replacement DCSM
to the same parameters as the existing mobile unit after switching on the
power supply. Refer to Chapter 1, Equipment operation, for the
programming procedure.
8. At the MTX, ensure that the datafill information on the replacement unit
is correct.
9. At the MTX, put the cell site back into service.
10. Verify that the replacement unit is functioning correctly.
11. Return the faulty unit to your Nortel Networks Customer Service
Operations office for repair.
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
12-6
Enclosure maintenance
Replacing faulty radio frequency (RF) units
CAUTION
Service interruption
The enclosure may be completely out-of-service when a unit
such as the RIP, a duplexer, or a MCPA is removed. Replace
these units during low traffic period.
For the replacement of a radio frequency (RF) unit, use the following procedure:
1. At the MTX, put the cell site or the unit out-of-service as required.
2. If replacing the Rack Interface Panel (RIP), switch off the supply to
the RIP at the rectifier. If replacing a TRU or MCPA shelf, switch off
the circuit breaker to that unit at the RIP.
CAUTION
Hot insertion replacement may cause damage to the
components and a possible service interruption.
3. Label and disconnect the cables/connectors connected to the unit.
4. Remove the screws mounting the unit to the frame and then remove the
unit from the frame.
5. Replace a new or known working unit on to the frame and fix it with the
mounting screws.
6. Reconnect the cables/connectors to their appropriate locations. Ensure
that they are connected properly.
7. Switch on the circuit breaker to the unit at the RIP or switch on the power
supply to the RF Frame at the power plant.
8. At the MTX, ensure that the datafill information on the replacement unit
is correct.
9. At the MTX, put the cell site back into service.
10. Verify that the replacement unit is functioning correctly.
11. Return the faulty unit to your Nortel Networks Customer Service
Operations office for repair.
411-2051-500
Draft
00.01
November 1999
Replacing faulty radio frequency (RF) units
12-7
Replacing the TRU or MCPA shelf
The channels associated with the TRU or MCPA shelf should be out-ofservice during the off-line replacement. This is of major significance if it is
supporting the control channel of the site/sector. In that case, ensure the
system switches to a back-up channel.
Follow the procedure when replacing a TRU or MCPA shelf:
1. At the MTX, put the affected channels out-of-service.
2. Switch off the circuit breaker of the shelf at the RIP.
3. Label and disconnect the cables/connectors connected to the backplane of
the shelf.
4. Remove the TRUs or MCPA modules from the shelf.
5. Loosen the screws mounting the shelf to the RF frame and then remove
the shelf from the frame.
6. Replace a new or known working shelf on to the frame and fix it with the
mounting screws.
7. Replace the TRUs or MCPA modules back to the shelf and fix them with
the mounting screws.
8. Reconnect the cables/connectors to their appropriate locations on the
backplane of the shelf. Ensure that they are connected properly.
9. Switch on the circuit breaker of the shelf at the RIP.
10. At the MTX, put the affected channels in-service.
General rules for replacing a TRU or an MCPA module
The following rules must be followed when replacing a TRU or a MCPA
module:
• Pull evenly and firmly on the module handle to pull the module out of the
backplane connector. If excessive resistance is felt, stop and investigate
the reason.
•
Slide the module directly and squarely into and out of the shelf guide slot.
•
When inserting a module, carefully line up the module connectors and the
backplane connectors before trying to seat the module. The module
should seat easily into the shelf. Do not force the module into the shelf. If
the connectors are out of alignment, damage to the module and the
backplane will result.
Replacing the TRU
The Transmit Receive Unit (TRU) can be changed with the DC power on.
The channel associated with the TRU should be out-of-service during the offline replacement. This is of major significance if it is a control or locate
channel. In that case, ensure the system switches to a back-up channel.
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
12-8
Enclosure maintenance
Follow the procedure when replacing a TRU:
1. At the MTX, put the affected channel(s) out-of-service.
2. Loosen the tab at the top edge of the TRU and move it away from the
TRU.
3. Using the handle on the front of the TRU, gently pull the module out of
the backplane connector and then slide it out of the shelf.
4. Place the replacement unit in the shelf guides.
5. Slide the unit into the shelf until it reaches the backplane connector.
6. Line up the TRU connector with the backplane connector and carefully
mate the connectors. Do not force the module into the shelf. If this is not
done with care, the pins of the connector may be damaged.
7. Move the tab over the top edge of the TRU and tighten the tab.
8. Perform the operational checks on the TRU.
9. At the MTX, put the channel/DRU in-service.
10. Perform a call through test on the TRU replaced. It may be necessary to
make several calls before the system selects the channel number assigned
to the DRU.
Replacing the MCPA module
The channels associated with the Multi-Channel Power Amplifier (MCPA)
module should be out-of-service during the off-line replacement. This is of
major significance if it is supporting the control channel of the site/sector. In
that case, ensure the system switches to a back-up channel.
Follow the procedure when replacing a MCPA:
1. At the MTX, put the affected channels out-of-service.
2. Turn the RF ON switch on the front panel of the MCPA module to OFF.
3. Switch off the circuit breaker of the MCPA module at the RIP.
4. Loosen the screws mounting the MCPA module to the MCPA shelf and
then remove the module from the shelf.
5. Replace a new or known working MCPA module on to the shelf and fix it
with the mounting screws.
6. Switch on the circuit breaker of the MCPA module at the RIP.
7. Turn the RF ON switch on the front panel of the MCPA module to ON.
8. Perform the operational checks on the MCPA.
9. At the MTX, put the affected channels in-service.
411-2051-500
Draft
00.01
November 1999
Returning a faulty unit to your Nortel Networks CSO office
12-9
Returning a faulty unit to your Nortel Networks CSO office
After the replacement, return the faulty unit to your Nortel Networks
Customer Service Operations (CSO) office for repair. Consult your Sales
Manager or Account Manager for the specific return and repair process.
Remember to attach the Customer Return (CR) number to the faulty unit.
For United States customers, ship to:
Nortel Networks
Attn. Customer Service Operations
400 N. Industrial
Richardson, Texas 75081
For Bell Canada customers, ship through Telco Internal Mail/Expedite Votre
Courier-Interna to:
Nortel Networks
Customer Service Operations
c/o Wesbell Transport
1630 Trinity Rd., Unit #3, Door #4
Mississauga, Ontario L5T 1L6
Attn.: Replacement and Repair Operations
Dept.: S898
For Mexico customers, ship to:
Nortel Networks
Toltecas #113?Col. San Pedro De Los Pinos
Casi Esq Calle 4
Mexico
For Asia Pacific customers, ship to:
Nortel Networks
Attn.: Technical Assistance Service
Warwick House 17/F
28 Tong Chong Street
Quarry Bay, Hong Kong
For Non-Bell Canada/CALA/International customers, ship to:
Nortel Networks
Customer Service Operations
c/o Wesbell Transport
1630 Trinity Rd., Unit #3, Door #4
Mississauga, Ontario L5T 1L6
Attn.: Replacement and Repair Operations
Dept.: S898
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
12-10
Enclosure maintenance
411-2051-500
Draft
00.01
November 1999
1
A-1
Appendix A: Frequency table
System's channel and frequency
System
Channel
Not Used
Receive frequency
Transmit frequency
990
824.010 MHz
869.010 MHz
A”
991 to 1023
824.040 to 825.000 MHz
869.040 to 870.000 MHz
1 to 333
825.030 to 834.990 MHz
870.030 to 879.990 MHz
334 to 666
835.020 to 844.980 MHz
880.020 to 889.980 MHz
A’
667 to 716
845.010 to 846.480 MHz
890.010 to 891.480 MHz
B’
717 to 799
846.510 to 848.970 MHz
891.510 to 893.970 MHz
Channel frequency calculation (in the following, N = channel number)
1.
When the channel is between 1 and 799:
Receive frequency (in MHz) = 0.03N + 825.000
Transmit frequency (in MHz) = 0.03N + 870.000
2.
When the channel is between 990 and 1023:
Receive frequency (in MHz) = 0.03(N - 1023) + 825.000
Transmit frequency (in MHz) = 0.03(N - 1023) + 870.000
AMPS frequency allocation
Band ‘A’
Control channels
313-333
Non-wireline carriers
Voice channels
001-312
Voice channels, expanded spectrum
667-716
991-1023
Band ‘B’
Control channels
334-354
Wireline carriers
Voice channels
355-666
Voice channels, expanded spectrum
717-799
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
2
A-2
Appendix A: Frequency table
Chan
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
RX
825.03
825.06
825.09
825.12
825.15
825.18
825.21
825.24
825.27
825.30
825.33
825.36
825.39
825.42
825.45
825.48
825.51
825.54
825.57
825.60
825.63
825.66
825.69
825.72
825.75
825.78
825.81
825.84
825.87
825.90
825.93
825.96
825.99
826.02
826.05
826.08
826.11
826.14
826.17
826.20
826.23
826.26
826.29
826.32
826.35
826.38
826.41
826.44
826.47
826.50
411-2051-500
TX
Chan
RX
870.03
51
826.53
870.06
52
826.56
870.09
53
826.59
870.12
54
826.62
870.15
55
826.65
870.18
56
826.68
870.21
57
826.71
870.24
58
826.74
870.27
59
826.77
870.30
60
826.80
870.33
61
826.83
870.36
62
826.86
870.39
63
826.89
870.42
64
826.92
870.45
65
826.95
870.48
66
826.98
870.51
67
827.01
870.54
68
827.04
870.57
69
827.07
870.60
70
827.10
870.63
71
827.13
870.66
72
827.16
870.69
73
827.19
870.72
74
827.22
870.75
75
827.25
870.78
76
827.28
870.81
77
827.31
870.84
78
827.34
870.87
79
827.37
870.90
80
827.40
870.93
81
827.43
870.96
82
827.46
870.99
83
827.49
871.02
84
827.52
871.05
85
827.55
871.08
86
827.58
871.11
87
827.61
871.14
88
827.64
871.17
89
827.67
871.20
90
827.70
871.23
91
827.73
871.26
92
827.76
871.29
93
827.79
871.32
94
827.82
871.35
95
827.85
871.38
96
827.88
871.41
97
827.91
871.44
98
827.94
871.47
99
827.97
871.50 100 828.00
Draft
00.01
TX
Chan
RX
871.53 101 828.03
871.56 102 828.06
871.59 103 828.09
871.62 104 828.12
871.65 105 828.15
871.68 106 828.18
871.71 107 828.21
871.74 108 828.24
871.77 109 828.27
871.80 110 828.30
871.83 111 828.33
871.86 112 828.36
871.89 113 828.39
871.92 114 828.42
871.95 115 828.45
871.98 116 828.48
872.01 117 828.51
872.04 118 828.54
872.07 119 828.57
872.10 120 828.60
872.13 121 828.63
872.16 122 828.66
872.19 123 828.69
872.22 124 828.72
872.25 125 828.75
872.28 126 828.78
872.31 127 828.81
872.34 128 828.84
872.37 129 828.87
872.40 130 828.90
872.43 131 828.93
872.46 132 828.96
872.49 133 828.99
872.52 134 829.02
872.55 135 829.05
872.58 136 829.08
872.61 137 829.11
872.64 138 829.14
872.67 139 829.17
872.70 140 829.20
872.73 141 829.23
872.76 142 829.26
872.79 143 829.29
872.82 144 829.32
872.85 145 829.35
872.88 146 829.38
872.91 147 829.41
872.94 148 829.44
872.97 149 829.47
873.00 150 829.50
November 1999
TX
Chan
RX
873.03 151 829.53
873.06 152 829.56
873.09 153 829.59
873.12 154 829.62
873.15 155 829.65
873.18 156 829.68
873.21 157 829.71
873.24 158 829.74
873.27 159 829.77
873.30 160 829.80
873.33 161 829.83
873.36 162 829.86
873.39 163 829.89
873.42 164 829.92
873.45 165 829.95
873.48 166 829.98
873.51 167 830.01
873.54 168 830.04
873.57 169 830.07
873.60 170 830.10
873.63 171 830.13
873.66 172 830.16
873.69 173 830.19
873.72 174 830.22
873.75 175 830.25
873.78 176 830.28
873.81 177 830.31
873.84 178 830.34
873.87 179 830.37
873.90 180 830.40
873.93 181 830.43
873.96 182 830.46
873.99 183 830.49
874.02 184 830.52
874.05 185 830.55
874.08 186 830.58
874.11 187 830.61
874.14 188 830.64
874.17 189 830.67
874.20 190 830.70
874.23 191 830.73
874.26 192 830.76
874.29 193 830.79
874.32 194 830.82
874.35 195 830.85
874.38 196 830.88
874.41 197 830.91
874.44 198 830.94
874.47 199 830.97
874.50 200 831.00
TX
874.53
874.56
874.59
874.62
874.65
874.68
874.71
874.74
874.77
874.80
874.83
874.86
874.89
874.92
874.95
874.98
875.01
875.04
875.07
875.10
875.13
875.16
875.19
875.22
875.25
875.28
875.31
875.34
875.37
875.40
875.43
875.46
875.49
875.52
875.55
875.58
875.61
875.64
875.67
875.70
875.73
875.76
875.79
875.82
875.85
875.88
875.91
875.94
875.97
876.00
Appendix A: Frequency table
Chan
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
346
247
248
249
250
RX
831.03
831.06
831.09
831.12
831.15
831.18
831.21
831.24
831.27
831.30
831.33
831.36
831.39
831.42
831.45
831.48
831.51
831.54
831.57
831.60
831.63
831.66
831.69
831.72
831.75
831.78
831.81
831.84
831.87
831.90
831.93
831.96
831.99
832.02
832.05
832.08
832.11
832.14
832.17
832.20
832.23
832.26
832.29
832.32
832.35
832.38
832.41
832.44
832.47
832.50
TX
Chan
RX
876.03 251 832.53
876.06 252 832.56
876.09 253 832.59
876.12 254 832.62
876.15 255 832.65
876.18 256 832.68
876.21 257 832.71
876.24 258 832.74
876.27 259 832.77
876.30 260 832.80
876.33 261 832.83
876.36 262 832.86
876.39 263 832.89
876.42 264 832.92
876.45 265 832.95
876.48 266 832.98
876.51 267 833.01
876.54 268 833.04
876.57 269 833.07
876.60 270 833.10
876.63 271 833.13
876.66 272 833.16
876.69 273 833.19
876.72 274 833.22
876.75 275 833.25
876.78 276 833.28
876.81 277 833.31
876.84 278 833.34
876.87 279 833.37
876.90 280 833.40
876.93 281 833.43
876.96 282 833.46
876.99 283 833.49
877.02 284 833.52
877.05 285 833.55
877.08 286 833.58
877.11 287 833.61
877.14 288 833.64
877.17 289 833.67
877.20 290 833.70
877.23 291 833.73
877.26 292 833.76
877.29 293 833.79
877.32 294 833.82
877.35 295 833.85
877.38 296 833.88
877.41 297 833.91
877.44 298 833.94
877.47 299 833.97
877.50 300 834.00
Wireless Solutions
TX
Chan
RX
877.53 301 834.03
877.56 302 834.06
877.59 303 834.09
877.62 304 834.12
877.65 305 834.15
877.68 306 834.18
877.71 307 834.21
877.74 308 834.24
877.77 309 834.27
877.80 310 834.30
877.83 311 834.33
877.86 312 834.36
877.89 313 834.39
877.92 314 834.42
877.95 315 834.45
877.98 316 834.48
878.01 317 834.51
878.04 318 834.54
878.07 319 834.57
878.10 320 834.60
878.13 321 834.63
878.16 322 834.66
878.19 323 834.69
878.22 324 834.72
878.25 325 834.75
878.28 326 834.78
878.31 327 834.81
878.34 328 834.84
878.37 329 834.87
878.40 330 834.90
878.43 331 834.93
878.46 332 834.96
878.49 333 834.99
878.52 334 835.02
878.55 335 835.05
878.58 336 835.08
878.61 337 835.11
878.64 338 835.14
878.67 339 835.17
878.70 340 835.20
878.73 341 835.23
878.76 342 835.26
878.79 343 835.29
878.82 344 835.32
878.85 345 835.35
878.88 346 835.38
878.91 347 835.41
878.94 348 835.44
878.97 349 835.47
879.00 350 835.50
DualMode 800 Enclosure
TX
Chan
RX
879.03 351 835.53
879.06 352 835.56
879.09 353 835.59
879.12 354 835.62
879.15 355 835.65
879.18 356 835.68
879.21 357 835.71
879.24 358 835.74
879.27 359 835.77
879.30 360 835.80
879.33 361 835.83
879.36 362 835.86
879.39 363 835.89
879.42 364 835.92
879.45 365 835.95
879.48 366 835.98
879.51 367 836.01
879.54 368 836.04
879.57 369 836.07
879.60 370 836.10
879.63 371 836.13
879.66 372 836.16
879.69 373 836.19
879.72 374 836.22
879.75 375 836.25
879.78 376 836.28
879.81 377 836.31
879.84 378 836.34
879.87 379 836.37
879.90 380 836.40
879.93 381 836.43
879.96 382 836.46
879.99 383 836.49
880.02 384 836.52
880.05 385 836.55
880.08 386 836.58
880.11 387 836.61
880.14 388 836.64
880.17 389 836.67
880.20 390 836.70
880.23 391 836.73
880.26 392 836.76
880.29 393 836.79
880.32 394 836.82
880.35 395 836.85
880.38 396 836.88
880.41 397 836.91
880.44 398 836.94
880.47 399 836.97
880.50 400 837.00
Maintenance Manual
A-3
TX
880.53
880.56
880.59
880.62
880.65
880.68
880.71
880.74
880.77
880.80
880.83
880.86
880.89
880.92
880.95
880.98
881.01
881.04
881.07
881.10
881.13
881.16
881.19
881.22
881.25
881.28
881.31
881.34
881.37
881.40
881.43
881.46
881.49
881.52
881.55
881.58
881.61
881.64
881.67
881.70
881.73
881.76
881.79
881.82
881.85
881.88
881.91
881.94
881.97
882.00
MTX08
A-4
Appendix A: Frequency table
Chan
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
RX
837.03
837.06
837.09
837.12
837.15
837.18
837.21
837.24
837.27
837.30
837.33
837.36
837.39
837.42
837.45
837.48
837.51
837.54
837.57
837.60
837.63
837.66
837.69
837.72
837.75
837.78
837.81
837.84
837.87
837.90
837.93
837.96
837.99
838.02
838.05
838.08
838.11
838.14
838.17
838.20
838.23
838.26
838.29
838.32
838.35
838.38
838.41
838.44
838.47
838.50
411-2051-500
TX
Chan
RX
882.03 451 838.53
882.06 452 838.56
882.09 453 838.59
882.12 454 838.62
882.15 455 838.65
882.18 456 838.68
882.21 457 838.71
882.24 458 838.74
882.27 459 838.77
882.30 460 838.80
882.33 461 838.83
882.36 462 838.86
882.39 463 838.89
882.42 464 838.92
882.45 465 838.95
882.48 466 838.98
882.51 467 839.01
882.54 468 839.04
882.57 469 839.07
882.60 470 839.10
882.63 471 839.13
882.66 472 839.16
882.69 473 839.19
882.72 474 839.22
882.75 475 839.25
882.78 476 839.28
882.81 477 839.31
882.84 478 839.34
882.87 479 839.37
882.90 480 839.40
882.93 481 839.43
882.96 482 839.46
882.99 483 839.49
883.02 484 839.52
883.05 485 839.55
883.08 486 839.58
883.11 487 839.61
883.14 488 839.64
883.17 489 839.67
883.20 490 839.70
883.23 491 839.73
883.26 492 839.76
883.29 493 839.79
883.32 494 839.82
883.35 495 839.85
883.38 496 839.88
883.41 497 839.91
883.44 498 839.94
883.47 499 839.97
883.50 500 840.00
Draft
00.01
TX
Chan
RX
883.53 501 840.03
883.56 502 840.06
883.59 503 840.09
883.62 504 840.12
883.65 505 840.15
883.68 506 840.18
883.71 507 840.21
883.74 508 840.24
883.77 509 840.27
883.80 510 840.30
883.83 511 840.33
883.86 512 840.36
883.89 513 840.39
883.92 514 840.42
883.95 515 840.45
883.98 516 840.48
884.01 517 840.51
884.04 518 840.54
884.07 519 840.57
884.10 520 840.60
884.13 521 840.63
884.16 522 840.66
884.19 523 840.69
884.22 524 840.72
884.25 525 840.75
884.28 526 840.78
884.31 527 840.81
884.34 528 840.84
884.37 529 840.87
884.40 530 840.90
884.43 531 840.93
884.46 532 840.96
884.49 533 840.99
884.52 534 841.02
884.55 535 841.05
884.58 536 841.08
884.61 537 841.11
884.64 538 841.14
884.67 539 841.17
884.70 540 841.20
884.73 541 841.23
884.76 542 841.26
884.79 543 841.29
884.82 544 841.32
884.85 545 841.35
884.88 546 841.38
884.91 547 841.41
884.94 548 841.44
884.97 549 841.47
885.00 550 841.50
November 1999
TX
Chan
RX
885.03 551 841.53
885.06 552 841.56
885.09 553 841.59
885.12 554 841.62
885.15 555 841.65
885.18 556 841.68
885.21 557 841.71
885.24 558 841.74
885.27 559 841.77
885.30 560 841.80
885.33 561 841.83
885.36 562 841.86
885.39 563 841.89
885.42 564 841.92
885.45 565 841.95
885.48 566 841.98
885.51 567 842.01
885.54 568 842.04
885.57 569 842.07
885.60 570 842.10
885.63 571 842.13
885.66 572 842.16
885.69 573 842.19
885.72 574 842.22
885.75 575 842.25
885.78 576 842.28
885.81 577 842.31
885.84 578 842.34
885.87 579 842.37
885.90 580 842.40
885.93 581 842.43
885.96 582 842.46
885.99 583 842.49
886.02 584 842.52
886.05 585 842.55
886.08 586 842.58
886.11 587 842.61
886.14 588 842.64
886.17 589 842.67
886.20 590 842.70
886.23 591 842.73
886.26 592 842.76
886.29 593 842.79
886.32 594 842.82
886.35 595 842.85
886.38 596 842.88
886.41 597 842.91
886.44 598 842.94
886.47 599 842.97
886.50 600 843.00
TX
886.53
886.56
886.59
886.62
886.65
886.68
886.71
886.74
886.77
886.80
886.83
886.86
886.89
886.92
886.95
886.98
887.01
887.04
887.07
887.10
887.13
887.16
887.19
887.22
887.25
887.28
887.31
887.34
887.37
887.40
887.43
887.46
887.49
887.52
887.55
887.58
887.61
887.64
887.67
887.70
887.73
887.76
887.79
887.82
887.85
887.88
887.91
887.94
887.97
888.00
Appendix A: Frequency table
Chan
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
RX
843.03
843.06
843.09
843.12
843.15
843.18
843.21
843.24
843.27
843.30
843.33
843.36
843.39
843.42
843.45
843.48
843.51
843.54
843.57
843.60
843.63
843.66
843.69
843.72
843.75
843.78
843.81
843.84
843.87
843.90
843.93
843.96
843.99
844.02
844.05
844.08
844.11
844.14
844.17
844.20
844.23
844.26
844.29
844.32
844.35
844.38
844.41
844.44
844.47
844.50
TX
Chan
RX
888.03 651 844.53
888.06 652 844.56
888.09 653 844.59
888.12 654 844.62
888.15 655 844.65
888.18 656 844.68
888.21 657 844.71
888.24 658 844.74
888.27 659 844.77
888.30 660 844.80
888.33 661 844.83
888.36 662 844.86
888.39 663 844.89
888.42 664 844.92
888.45 665 844.95
888.48 666 844.98
888.51 667 845.01
888.54 668 845.04
888.57 669 845.07
888.60 670 845.10
888.63 671 845.13
888.66 672 845.16
888.69 673 845.19
888.72 674 845.22
888.75 675 845.25
888.78 676 845.28
888.81 677 845.31
888.84 678 845.34
888.87 679 845.37
888.90 680 845.40
888.93 681 845.43
888.96 682 845.46
888.99 683 845.49
889.02 684 845.52
889.05 685 845.55
889.08 686 845.58
889.11 687 845.61
889.14 688 845.64
889.17 689 845.67
889.20 690 845.70
889.23 691 845.73
889.26 692 845.76
889.29 693 845.79
889.32 694 845.82
889.35 695 845.85
889.38 696 845.88
889.41 697 845.91
889.44 698 845.94
889.47 699 845.97
889.50 700 846.00
Wireless Solutions
TX
Chan
RX
889.53 701 846.03
889.56 702 846.06
889.59 703 846.09
889.62 704 846.12
889.65 705 846.15
889.68 706 846.18
889.71 707 846.21
889.74 708 846.24
889.77 709 846.27
889.80 710 846.30
889.83 711 846.33
889.86 712 846.36
889.89 713 846.39
889.92 714 846.42
889.95 715 846.45
889.98 716 846.48
890.01 717 846.51
890.04 718 846.54
890.07 719 846.57
890.10 720 846.60
890.13 721 846.63
890.16 722 846.66
890.19 723 846.69
890.22 724 846.72
890.25 725 846.75
890.28 726 846.78
890.31 727 846.81
890.34 728 846.84
890.37 729 846.87
890.40 730 846.90
890.43 731 846.93
890.46 732 846.96
890.49 733 846.99
890.52 734 847.02
890.55 735 847.05
890.58 736 847.08
890.61 737 847.11
890.64 738 847.14
890.67 739 847.17
890.70 740 847.20
890.73 741 847.23
890.76 742 847.26
890.79 743 847.29
890.82 744 847.32
890.85 745 847.35
890.88 746 847.38
890.91 747 847.41
890.94 748 847.44
890.97 749 847.47
891.00 750 847.50
DualMode 800 Enclosure
TX
Chan
RX
891.03 751 847.53
891.06 752 847.56
891.09 753 847.59
891.12 754 847.62
891.15 755 847.65
891.18 756 847.68
891.21 757 847.71
891.24 758 847.74
891.27 759 847.77
891.30 760 847.80
891.33 761 847.83
891.36 762 847.86
891.39 763 847.89
891.42 764 847.92
891.45 765 847.95
891.48 766 847.98
891.51 767 848.01
891.54 768 848.04
891.57 769 848.07
891.60 770 848.10
891.63 771 848.13
891.66 772 848.16
891.69 773 848.19
891.72 774 848.22
891.75 775 848.25
891.78 776 848.28
891.81 777 848.31
891.84 778 848.34
891.87 779 848.37
891.90 780 848.40
891.93 781 848.43
891.96 782 848.46
891.99 783 848.49
892.02 784 848.52
892.05 785 848.55
892.08 786 848.58
892.11 787 848.61
892.14 788 848.64
892.17 789 848.67
892.20 790 848.70
892.23 791 848.73
892.26 792 848.76
892.29 793 848.79
892.32 794 848.82
892.35 795 848.85
892.38 796 848.88
892.41 797 848.91
892.44 798 848.94
892.47 799 848.97
892.50 800 Resrvd
Maintenance Manual
A-5
TX
892.53
892.56
892.59
892.62
892.65
892.68
892.71
892.74
892.77
892.80
892.83
892.86
892.89
892.92
892.95
892.98
893.01
893.04
893.07
893.10
893.13
893.16
893.19
893.22
893.25
893.28
893.31
893.34
893.37
893.40
893.43
893.46
893.49
893.52
893.55
893.58
893.61
893.64
893.67
893.70
893.73
893.76
893.79
893.82
893.85
893.88
893.91
893.94
893.97
Resrvd
MTX08
A-6
Appendix A: Frequency table
Chan
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
RX
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
411-2051-500
TX
Chan
RX
Resrvd 851 Resrvd
Resrvd 852 Resrvd
Resrvd 853 Resrvd
Resrvd 854 Resrvd
Resrvd 855 Resrvd
Resrvd 856 Resrvd
Resrvd 857 Resrvd
Resrvd 858 Resrvd
Resrvd 859 Resrvd
Resrvd 860 Resrvd
Resrvd 861 Resrvd
Resrvd 862 Resrvd
Resrvd 863 Resrvd
Resrvd 864 Resrvd
Resrvd 865 Resrvd
Resrvd 866 Resrvd
Resrvd 867 Resrvd
Resrvd 868 Resrvd
Resrvd 869 Resrvd
Resrvd 870 Resrvd
Resrvd 871 Resrvd
Resrvd 872 Resrvd
Resrvd 873 Resrvd
Resrvd 874 Resrvd
Resrvd 875 Resrvd
Resrvd 876 Resrvd
Resrvd 877 Resrvd
Resrvd 878 Resrvd
Resrvd 879 Resrvd
Resrvd 880 Resrvd
Resrvd 881 Resrvd
Resrvd 882 Resrvd
Resrvd 883 Resrvd
Resrvd 884 Resrvd
Resrvd 885 Resrvd
Resrvd 886 Resrvd
Resrvd 887 Resrvd
Resrvd 888 Resrvd
Resrvd 889 Resrvd
Resrvd 890 Resrvd
Resrvd 891 Resrvd
Resrvd 892 Resrvd
Resrvd 893 Resrvd
Resrvd 894 Resrvd
Resrvd 895 Resrvd
Resrvd 896 Resrvd
Resrvd 897 Resrvd
Resrvd 898 Resrvd
Resrvd 899 Resrvd
Resrvd 900 Resrvd
Draft
00.01
TX
Chan
RX
Resrvd 901 Resrvd
Resrvd 902 Resrvd
Resrvd 903 Resrvd
Resrvd 904 Resrvd
Resrvd 905 Resrvd
Resrvd 906 Resrvd
Resrvd 907 Resrvd
Resrvd 908 Resrvd
Resrvd 909 Resrvd
Resrvd 910 Resrvd
Resrvd 911 Resrvd
Resrvd 912 Resrvd
Resrvd 913 Resrvd
Resrvd 914 Resrvd
Resrvd 915 Resrvd
Resrvd 916 Resrvd
Resrvd 917 Resrvd
Resrvd 918 Resrvd
Resrvd 919 Resrvd
Resrvd 920 Resrvd
Resrvd 921 Resrvd
Resrvd 922 Resrvd
Resrvd 923 Resrvd
Resrvd 924 Resrvd
Resrvd 925 Resrvd
Resrvd 926 Resrvd
Resrvd 927 Resrvd
Resrvd 928 Resrvd
Resrvd 929 Resrvd
Resrvd 930 Resrvd
Resrvd 931 Resrvd
Resrvd 932 Resrvd
Resrvd 933 Resrvd
Resrvd 934 Resrvd
Resrvd 935 Resrvd
Resrvd 936 Resrvd
Resrvd 937 Resrvd
Resrvd 938 Resrvd
Resrvd 939 Resrvd
Resrvd 940 Resrvd
Resrvd 941 Resrvd
Resrvd 942 Resrvd
Resrvd 943 Resrvd
Resrvd 944 Resrvd
Resrvd 945 Resrvd
Resrvd 946 Resrvd
Resrvd 947 Resrvd
Resrvd 948 Resrvd
Resrvd 949 Resrvd
Resrvd 950 Resrvd
November 1999
TX
Chan
RX
Resrvd 951 Resrvd
Resrvd 952 Resrvd
Resrvd 953 Resrvd
Resrvd 954 Resrvd
Resrvd 955 Resrvd
Resrvd 956 Resrvd
Resrvd 957 Resrvd
Resrvd 958 Resrvd
Resrvd 959 Resrvd
Resrvd 960 Resrvd
Resrvd 961 Resrvd
Resrvd 962 Resrvd
Resrvd 963 Resrvd
Resrvd 964 Resrvd
Resrvd 965 Resrvd
Resrvd 966 Resrvd
Resrvd 967 Resrvd
Resrvd 968 Resrvd
Resrvd 969 Resrvd
Resrvd 970 Resrvd
Resrvd 971 Resrvd
Resrvd 972 Resrvd
Resrvd 973 Resrvd
Resrvd 974 Resrvd
Resrvd 975 Resrvd
Resrvd 976 Resrvd
Resrvd 977 Resrvd
Resrvd 978 Resrvd
Resrvd 979 Resrvd
Resrvd 980 Resrvd
Resrvd 981 Resrvd
Resrvd 982 Resrvd
Resrvd 983 Resrvd
Resrvd 984 Resrvd
Resrvd 985 Resrvd
Resrvd 986 Resrvd
Resrvd 987 Resrvd
Resrvd 988 Resrvd
Resrvd 989 Resrvd
Resrvd 990 Resrvd
Resrvd 991 824.04
Resrvd 992 824.07
Resrvd 993 824.10
Resrvd 994 824.13
Resrvd 995 824.16
Resrvd 996 824.19
Resrvd 997 824.22
Resrvd 998 824.25
Resrvd 999 824.28
Resrvd 1000 824.31
TX
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
Resrvd
869.04
869.07
869.10
869.13
869.16
869.19
869.22
869.25
869.28
869.31
Appendix A: Frequency table
Chan
1001
1002
1003
1004
1005
1006
RX
824.34
824.37
824.40
824.43
824.46
824.49
TX
Chan
RX
869.34 1007 824.52
869.37 1008 824.55
869.40 1009 824.58
869.43 1010 824.61
869.46 1011 824.64
869.49 1012 824.67
TX
Chan
RX
869.52 1013 824.70
869.55 1014 824.73
869.58 1015 824.76
869.61 1016 824.79
869.64 1017 824.82
869.67 1018 824.85
TX
Chan
RX
869.70 1019 824.88
869.73 1020 824.91
869.76 1021 824.94
869.79 1022 824.97
869.82 1023 825.00
869.85
A-7
TX
869.88
869.91
869.94
869.97
870.00
Note: RX = Mobile Transmit frequency
TX = Base Station Transmit frequency
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
A-8
Appendix A: Frequency table
411-2051-500
Draft
00.01
November 1999
3
B-1
Appendix B: Test forms
This section shows the test forms for the operational tests of a DualMode 800
Enclosure:
• Power and grounding checks
•
HSMO checks
•
Antenna checks
•
DRU checks — Transmit tests
•
DRU checks — Receive tests
•
DRU checks — Digital tests
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
4
B-2
Appendix B: Test forms
Power and grounding checks (Chapter 4)
Cell:
Date:
Frame voltage and polarity test
Performed by:
Bay 1
Bay 2
Bay 3
A Power: +27 Vdc ±0.5 Vdc
B Power: +27 Vdc ±0.5 Vdc
Bay 1 voltage
check
TRU
Shelf 1
TRU
Shelf 2
TRU
Shelf 3
MCPA
Shelf 1
ICRM
CSU
LVD 1
TCU 1
TRU
Shelf 4
TRU
Shelf 5
TRU
Shelf 6
MCPA
Shelf 2
LVD 2
TCU 2
LVD 3
(Bay 3)
TCU 3
(Bay 3)
TRU
Shelf 7
TRU
Shelf 8
TRU
Shelf 9
MCPA
Shelf 3
ACU
DCSM
HSMO
ERMC
A Power:
+27 ±0.5 Vdc
B Power:
+27 ±0.5 Vdc
Resistance to
ground: <0.5 Ω
Bay 2 voltage
check
A Power:
+27 ±0.5 Vdc
B Power:
+27 ±0.5 Vdc
Resistance to
ground: <0.5 Ω
Bay 3 voltage
check
A Power:
+27 ±0.5 Vdc
B Power:
+27 ±0.5 Vdc
Resistance to
ground: <0.5 Ω
411-2051-500
Draft
00.01
November 1999
Appendix B: Test forms
B-3
HSMO checks (Chapter 5)
Cell:
Date:
Performed by:
HSMO power level and frequency checks
HSMO output
Position Position Position Position Position Position Position Position
Power level:
-1 dBm ±3 dB
Frequency:
4.8 MHz ±1.2 Hz
HSMO output
Position Position Position Position Position Position Position Position
10
11
12
13
14
15
16
Power level:
-1 dBm ±3 dB
Frequency:
4.8 MHz ±1.2 Hz
Antenna checks (Chapter 6)
Cell:
Date:
Antenna
Performed by:
TX/RX 1 TX/RX 2 TX/RX 3
RX 1
RX 2
RX 3
DC continuity (Resistance—center
pin to shield): ≤0.5 Ω
DC continuity (Resistance—shield
to principle ground): ≤0.5 Ω
Antenna return 824 - 849 MHz
loss: >14.5 dB +
2 TX line loss
869 - 894 MHz
Antenna return loss (Thruline
wattmeter): Reflected power <4% of
forward power
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
B-4
Appendix B: Test forms
DRU checks — Transmit tests (Chapter 11)
Cell:
Date:
Performed by:
RF Frame:
TRU Shelf:
TRU transmit tests
TRU 1
TRU 2
TRU 3
TRU 4
Serial number:
Channel number:
TX frequency (MHz):
EEPROM CRC check:
TX carrier frequency error:
-220 to +220 Hz
Wideband modulation:
Deviation 7.2 to 8.8 kHz
SAT at 5970 Hz:
Frequency 5965 to 5975 Hz
Deviation 1.8 to 2.2 kHz
SAT at 6000 Hz:
Frequency 5995 to 6005 Hz
Deviation 1.8 to 2.2 kHz
SAT at 6030 Hz:
Frequency 6025 to 6035 Hz
Deviation 1.8 to 2.2 kHz
Residual modulation:
Deviation -0.5 to +0.5 kHz
Transmit audio level:
Deviation 2.61 to 3.19 kHz
Modulation limiting:
Deviation less than 12 kHz
1 kHz tone generation test:
Frequency 999 to 1001 Hz
Deviation 7.2 to 8.8 kHz
Transmit carrier power measured at antenna port of duplexer
Per channel power level:
Within site specifications
411-2051-500
Draft
00.01
November 1999
TRU 5
TRU 6
TRU 7
TRU 8
Appendix B: Test forms
B-5
DRU checks — Receive tests (Chapter 11)
Cell:
Date:
Performed by:
RF Frame:
TRU Shelf:
TRU receive tests
TRU 1
TRU 2
TRU 3
TRU 4
TRU 5
TRU 6
TRU 7
TRU 8
Serial number:
Channel number:
RX frequency (MHz):
EEPROM CRC check:
Receive sensitivity (Level):
Less than -105 dBm
RX/TX audio sensitivity:
Deviation 2.6 to 3.2 kHz
Receive audio level:
Level -17.0 to -19.0 dBm
RSSI curve:
Input (dBm)
-60
RSSI (dBm)
-66 to -76
-70
-76 to -86
-80
-86 to -96
-84
-90 to -100
-90
-96 to -106
-100
-106 to -116
SAT detect 5970 Hz (level
lost all): Less than -105 dBm
SAT detect 6000 Hz (level
lost all): Less than -105 dBm
SAT detect 6030 Hz (level
lost all): Less than -105 dBm
ST detect 10 kHz (level lost
all): Less than -105 dBm
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
B-6
Appendix B: Test forms
DRU checks — Digital tests (Chapter 11)
Cell:
Date:
Performed by:
RF Frame:
TRU Shelf:
TRU digital tests
TRU 1
TRU 2
Serial number:
Channel number:
Bit Error Rate measure:
Less than 6000 in 1,000,000
TDMA modulation accuracy
I/Q offset:
Less than -30 dBc
Frequency error:
+220 to -220 Hz
RMS EVM:
Less than 12.5%
Digital call completed
Clear audio: (Yes or no)
411-2051-500
Draft
00.01
November 1999
TRU 3
TRU 4
TRU 5
TRU 6
TRU 7
TRU 8
Family Product Manual Contacts Copyright Confidentiality Legal
NORTEL NETWORKS CONFIDENTIAL
The information contained herein is the property of Nortel
Networks and is strictly confidential. Except as expressly
authorized in writing by Nortel Networks, the holder shall keep all
information contained herein confidential, shall disclose it only to
its employees with a need to know, and shall protect it, in whole
or in part, from disclosure and dissemination to third parties with
the same degree of care it uses to protect its own confidential
information, but with no less than reasonable care. Except as
expressly authorized in writing by Nortel Networks, the holder is
granted no rights to use the information contained herein.
Information is subject to change without notice. Nortel Networks
reserves the right to make changes in design or components as
progress in engineering and manufacturing may warrant.
This equipment generates, uses and can radiate radio frequency
Wireless Solutions
energy. If not installed and used in accordance with the
instruction manual, this equipment may cause harmful
interference to radio communications. Operation of this
Maintenance
Manual
equipment in a residential
DualMode 800 Enclosure
area is likely to cause harmful interference, in which case the
To order Wireless Solutions documentation, call
user will be required to correct the interference at their own
1-800-NTI-CARE (1-800-684-2273)
expense.
To report a problem in Wireless Solutions documentation, call
1-800-NTI-CARE (1-800-684-2273)
or send e-mail from the Wireless SolutionsTraining and
Documentation World Wide Web site at
DMS, DMS-MTX, DualMode, MAP and NORTEL are
http://www1.nortelnetworks.com/wireless/DocuTrain/
trademarks of Nortel Networks.
Copyright  are
1999
Nortel Networks
AllatRights
Trademarks
acknowledged
withCorporation,
an asterisk (*)
their first
Reserved in the document.
appearance
Document number: 411-2051-500
Product release: MTX08
Document version: Draft 00.01
Date: November 1999
Printed in Canada

---

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