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

Avaya Canada Corporation TDMA - Dual Mode 800 MHz Enclosure 000 Frtmatt

User Manual

Wireless Solutions

DualMode 800 Enclosure

Maintenance Manual

MTX08 Draft 00.01 November 1999

DRAFT

411-2051-500

Wireless Solutions

DualMode 800 Enclosure

Maintenance Manual

Document number: 411-2051-500

Product release: MTX08

Document version: Draft 00.01

Date: November 1999

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 v

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Publication history

October 1999

Draft 00.01. Draft issue of document for internal review.

vi Publication history Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

Nortel Networks Confidential vii

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Contents 1

About this document xiii

Audience for this document xiii

Organization of this document xiv

Related documents

Nortel Networks Confidential 1-1

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Equipment operation 1

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.

1-2 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

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.

Nortel Networks Confidential Alarm Control Unit 1-3

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

1-4 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

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.

Nortel Networks Confidential Alarm Control Unit 1-5

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

1-6 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

• 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.

Nortel Networks Confidential Alarm Control Unit 1-7

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

1-8 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

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.

Nortel Networks Confidential DualMode Cell Site Monitor (DCSM) 1-9

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

DualMode Cell Site Monitor (DCSM)

The DualMode Cell Site Monitor (DCSM) can operate in two modes, stand-

alone 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.

1-10 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

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

SND PWR END

123

456

789

*0 #

RCL CLR STO

M1 FCN M2

QZ ABC DEF

GHI JKL MNO

PRS TUV WXY

InUse Roam NoSvc Digital

Display

Up/Down Volume

Control Button

Send Key End Key

Power Key

Digit Keys

Clear Key

Store Key

Function Key

One-Touch

Dial Keys

Recall Key

M6200 Handset

Nortel Networks Confidential DualMode Cell Site Monitor (DCSM) 1-11

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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 Adjusts the keypad, speaker and earpiece sound

Control keys 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 Numbers stored in either of these keys can be

(M1 and M2) dialed by simply pressing the appropriate key.

FCN (Function) key When used with other keys, personalizes your

phone.

1-12 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

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

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

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.

Nortel Networks Confidential DualMode Cell Site Monitor (DCSM) 1-13

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

—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.

1-14 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

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

Nortel Networks Confidential DualMode Cell Site Monitor (DCSM) 1-15

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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).

1-16 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

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).

For NAM4 only:

Use the arrow key to scroll to the 1st Digital Control Channel (1STDCCH)

display. Enter your 1st DCCH.

#DCCHS

1STDCCH

767

Nortel Networks Confidential DualMode Cell Site Monitor (DCSM) 1-17

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

Note: Nortel Networks recommends that unless under management

directive, the Unlock and Security codes not be changed from their

defaults.

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.

1-18 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

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.

Nortel Networks Confidential DualMode Cell Site Monitor (DCSM) 1-19

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

1-20 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

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.

Nortel Networks Confidential DualMode Cell Site Monitor (DCSM) 1-21

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

1-22 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

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)

Nortel Networks Confidential Transmit Receive Unit (TRU) 1-23

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

• 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

RS-232 port for the

Terminal Interface

connector

Handle

Status LEDs

1-24 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

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 Descri

tion/Action

ON LOS FAIL CCH LCR TX

1 Power-up

(

LED check

)

Flash Flash Flash Flash Flash Flash

LEDs flash on and off for approximately

1 second, then radio

oes to state 2.

2Dia

nostics Off Last

state Last

state On 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.

3 ROM-idle On Last

state Last

state On 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).

4 Loadin

On Off Off

Flash Flash

Off The ON LED is on and the CCH and

LCR LEDs flash durin

the loadin

period. When loadin

is complete, radio

returns to state 2.

5 Idle fault Off Off On Off Off Off The radio is in this state when a

hardware dia

nostic test fails before

the radio is put into service. When the

radio is in this state, perform the

followin

(

)

Re-seat the radio into its slot a

ain

(

or to another slot

)

to identif

if the fail

was caused b

a power suppl

litch or

some other transient event.

(

)

If the fault is cleared, the FAIL LED

turns off, the ON, CCH and LCR LEDs

turn on and the radio proceeds to state

(

)

If the FAULT LED remains on,

replace the radio and return it to

our

Customer Service Office

(

CSO

)

for

repair.

- continued -

Nortel Networks Confidential Transmit Receive Unit (TRU) 1-25

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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

6 In-service

—DCCH or

2T+C

On Off Off On Off On Durin

normal operation, the TX LED

turns on whenever the radio’s

transmitter is active.

Radio remains in this state until one of

the followin

s happens:

—external failure detected, radio

oes

to state 7

—internal hardware failure detected,

radio

oes to state 8

—radio taken out of service b

the MTX

(

SYBSY

)

or b

an operator

(

MANB

)

radio

oes to state 2

In-service

—TTC

(

transmitter

active

)

On Off Off Off Off On

In-service

—TTC

(

transmitter

inactive

)

On Off Off Off Off Off

7LOS On On

(

Note

)

Off Last

state Last

state

(

Note

)

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 in-

service trouble state. Service is

restored when the connection to the

DSPM is re-established.

8Fault OffOffOn

(

Note

)

Off Off Off 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 -

Table 1-1

Transitions in the TRU3 LED state (continued)

State Status LED Descri

tion/Action

ON LOS FAIL CCH LCR TX

1-26 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

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.

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.

CAUTION

Service interru

tion

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.

Nortel Networks Confidential Transmit Receive Unit (TRU) 1-27

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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

For the TRU3:

TRU-III Terminal Interface

1-28 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

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 on-

line 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

• 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

Nortel Networks Confidential Transmit Receive Unit (TRU) 1-29

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Figure 1-8

Fullscreen display for the TRU2

DRU statusCommand menuOutput messageCommand prompt

AMPS Mode

TDMA Mode

Load: TRU2AT79 ROM: RDRUAB04 EEPROM: Passed HW Ver: rar S/N: 531DDERA

PA FW: -------- PA HW: ---- PA PEC: -------- PA S/N: ---------------

AMPS STATUS

Channel: ---- PA: off SAT TX: 6000 ( on) Antenna Port A: 1 B: 4

Synth Lock: NO TxPwrIndex: 0 Compandor: on Antenna Path: DIV

PA Alarm: off TxPwrStep: 4.00 Loopback: BCH Audio Sens RX: -18.0

Audio: off MaxTxPwr: 27.00 Tone Gen: off Audio Sens TX: -18.0

------------------------------Signal Readings-----------------------------------

RX RSSI: Antenna Port: 1 2 3 4 5 6

RX SAT: RSSI Offset : 0.0 0.0 0.0 0.0 0.0 0.0

RX ST: RSSI : - - - - - -

----------------------------------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.

Load: TRU2AT79 ROM: RDRUAB04 EEPROM: Passed HW Ver: rar S/N: 531DDERA

PA FW: -------- PA HW: ---- PA PEC: -------- PA S/N: ---------------

TDMA STATUS

Channel: ---- PA: off DVCC: 01 Antenna Port A: 1 B: 4

Synth Lock: NO TxPwrIndex: 0 Slot: 1 Antenna Path: DIV

PA Alarm: off TxPwrStep: 4.00 Loopback: BCH

MaxTxPwr: 27.00 Tone Gen: off

------------------------------Signal Readings-----------------------------------

RX RSSI: Antenna Port: 1 2 3 4 5 6

RX DVCC RSSI Offset : 0.0 0.0 0.0 0.0 0.0 0.0

( ) : RSSI : - - - - - -

----------------------------------COMMANDS--------------------------------------

A) AMPS Mode F) Set MAXTXPOW M) Set Antenna Port S) Test TRU display

B) Set Channel G) Set DVCC N) Set Path T) Standalone TX

C) PA on/off H) Set Slot O) Set RSSI Offset U) Set TXPOWSTEP

D) PA LED on/off I) Tone Gen P) Detect DVCC,RSSI X) Exit

E) Set TXPOWIDX J) Loopback Q) Detect ALL RSSI Y) Restart TRU

--------------------------------------------------------------------------------

Screen Refresh completed.

1-30 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

Figure 1-9

Fullscreen display for the TRU3

DRU statusCommand menuOutput messageCommand prompt

AMPS Mode

TDMA Mode

Load: TRU31W40 Boot: BDRUAA01 CRC: Passed HW Ver: rq1 S/N: 530d8d0a

PA FW: -------- PA HW: 5765 PA PEC: nthx51aa PA S/N: nntm61015ah7--

AMPS STATUS

Channel: 367 PA: on SAT TX: 6000 (off) Antenna Port A: 1 B: 4

Synth Lock: yes TxPwrIndex: 0 Compandor: off Antenna Path: DIV

PA Alarm: off TxPwrStep: 4.00 Loopback: off Audio Sens RX: -28.0

Audio: off MaxTxPwr: 47.00 Tone Gen: off Audio Sens TX: -16.0

------------------------------Signal Readings-----------------------------------

RX RSSI: Antenna Port: 1 2 3 4 5 6

RX SAT: RSSI Offset : 0.0 0.0 0.0 0.0 0.0 0.0

RX ST: RSSI : - - - - - -

----------------------------------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.

Load: TRU31W40 ROM: BDRUAA01 CRC: Passed HW Ver: rq1 S/N: 530d8d0a

PA FW: -------- PA HW: 5765 PA PEC: nthx51aa PA S/N: nntm61015ah7--

TDMA STATUS

Channel: 367 PA: off DVCC: 01 Antenna Port A: 1 B: 4

Synth Lock: yes TxPwrIndex: 0 Slot: 1 Antenna Path: DIV

PA Alarm: off TxPwrStep: 4.00 Loopback: off

MaxTxPwr: 47.00 Tone Gen: off

------------------------------Signal Readings-----------------------------------

RX RSSI: Antenna Port: 1 2 3 4 5 6

RX DVCC RSSI Offset : 0.0 0.0 0.0 0.0 0.0 0.0

( ) : RSSI : - - - - - -

----------------------------------COMMANDS--------------------------------------

A) AMPS Mode F) Set MAXTXPOW M) Set Antenna Port T) Standalone TX

B) Set Channel G) Set DVCC N) Set Path U) Set TXPOWSTEP

C) PA on/off H) Set Slot O) Set RSSI Offset X) Exit

D) PA LED on/off I) Tone Gen P) Detect DVCC,RSSI Y) Restart TRU

E) Set TXPOWIDX J) Loopback Q) Detect ALL RSSI

--------------------------------------------------------------------------------

Screen Refresh completed.

Nortel Networks Confidential Transmit Receive Unit (TRU) 1-31

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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

A Chan

e screen to TDMA mode displa

Chan

e screen to AMPS mode displa

B Set Channel Set Channel

C Set PA on/off Set PA on/off

D Set PA LED on/off Set PA LED on/off

E Set TXPOWIDX Set TXPOWIDX

F Set MAXTXPOW Set MAXTXPOW

G SAT Transmit Set DVCC

H Chan

e SAT Set SLOT

I Set Tone Gen Set Tone Gen

J Set Loopback Set Loopback

K Set Compandor —

L Set Wideband Data —

M Set Antenna Port Set Antenna Port

N Set Path Set Path

O Set RSSI Offset Set RSSI Offset

P Detect SAT/ST/RSSI Detect DVCC/RSSI

Q Detect ALL RSSI Detect ALL RSSI

R Set Rx/Tx Audio —

S Test TRU Displa

Test TRU Displa

T Set Audio Sens Standalone TX

U Set TXPOWSTEP Set TXPOWSTEP

XExit Exit

Y Restart TRU Restart TRU

1-32 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

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

Confi

uration functions

(

available to both the AMPS and the TDMA modes

)

Code Command Status Action/Initial Value

A Set Mode AMPS

TDMA To

les between the AMPS mode displa

and the TDMA

mode displa

B Set Channel 0000 Sets the current channel and updates the Channel field on

the displa

. If the TRU S

nthesizer was able to lock to the

specified channel, the S

nth Lock field displa

s "YES";

otherwise, the Channel field displa

s "----" and the S

nth

Lock field displa

s "NO".

D 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.

I Set Tone

Gen BCH

Off

Turns on either the tone

eneration

(

1004 Hz

)

on the B-

channel to the MTX, the RF tone

eneration

(

1 kHz

)

on air,

or turns off the tone

eneration. The status is shown in the

Tone Gen field.

J Set

Loopback BCH

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.

S Test Displa

(

not available

for TRU3

)

— Verifies the TRU's 8-character LED displa

alternatel

showin

the followin

three patterns on the LED displa

until the “Return” ke

is pressed:

00000000

********

........

X Exit — Leaves fullscreen monitor mode, clearin

the screen and

returnin

to command line mode.

Y Restart TRU W

CExecutes either a ROM level reset

(

C = COLD

)

or a

FLASH level restart

(

W = WARM

)

. You are prompted for

the t

pe of restart to be performed.

Note:

This will restart the DRU and force an exit from the

fullscreen monitor mode.

C Set PA on/off on/off Turns the TRU transmitter on or off. The status is shown in

the PA field.

- continued -

Nortel Networks Confidential Transmit Receive Unit (TRU) 1-33

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Table 1-3

TRU Fullscreen commands

(

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.

Transmit functions

(

available to both the AMPS and the TDMA modes

)

Code Command Status Action/Initial Value

E 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

ou set the power

level at “0” unless otherwise specified as a site re

uirement.

F Set

MAXTXPOW -1.0 dBm to

27.0 dBm

Note:

These

values are for

NO PATYPE

used in Urban.

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

command, it is not available if

ou have not previousl

set

the TRU power level.

Note:

If the TRU transmitter is on

(

C command

)

and the

power level is set

(

E command

)

, the TRU output power

chan

es immediatel

when this command is entered.

U Set

TXPOWSTEP 1..4 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

ou set the power

step size at “4” unless otherwise specified as a site

uirement.

- continued -

TRU Power Settin

sTRU

Out

Max Power/

MAXTXPOW Power Level/

TXPOWIDX Power Ste

size/

TXPOWSTEP Power

(

in dBm

)

1 15.75 0

(

no attenuation

)

4.00

(

default

)

15.75 -

(

0 x 4.00

)

= 15.75

2 27.00

(

default

)

3 3.75 27.00 -

(

3 x 3.75

)

= 15.75

3 27.00

(

default

)

5 2.25 27.00 -

(

5 x 2.25

)

= 15.75

1-34 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

Table 1-3

TRU Fullscreen commands

(

continued

)

Table 1-3

TRU Fullscreen commands

(

continued

)

Receive functions

(

available to both the AMPS and the TDMA modes

)

Code Command Status Action/Initial Value

M 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

: Onl

1 and 4 can be selected in Omni cell sites.

N Set Path A

DIV

Selects the antenna path. The status is shown in the

Antenna Path field. DIV indicates diversit

switchin

between paths A and B.

O 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

ran

e -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.

)

Q Detect All

RSSI —

nal

readin

area

displa

-000.0

Constantl

measures RSSI detected on all the six antenna

ports until the “Return” ke

is pressed. Updates the six

RSSI fields on the ri

ht hand side of the Si

nal Readin

area on the displa

Note:

The current path and port settin

s cannot be

determined after this command is executed. The

correspondin

status fields will be cleared.

- continued -

AMPS mode functions

(

available to the AMPS mode onl

Code Command Status Action/Initial Value

G Set SAT

Transmit on/off Turns on/off

eneration of SAT. The status is shown in the

SAT TX field.

H Chan

e SAT 5970

6000

6030

Sets the transmit SAT fre

uenc

. The selected SAT

fre

uenc

is shown in the SAT TX field.

K Set

Compandor on/off Sets TX compression and RX expansion on or off. The

status is shown in the Compandor field.

L Transmit

Wideband

Data

— Enables wideband data transmission. The TRU will be

to transmit wideband data at the currentl

selected TRU

power level. The wideband data transmission is disabled

pressin

the “Return” ke

- continued -

Nortel Networks Confidential Transmit Receive Unit (TRU) 1-35

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Table 1-3

TRU Fullscreen commands

(

continued

)

P Detect

SAT,ST,RSSI SAT, ST,

RSSI, A

(

all

)

nal

readin

area

displa

-000.0

Constantl

measures SAT, ST, and RSSI detected on the

assi

ned port of the current path

(

set b

the M and N

commands

)

until the “Return” ke

is pressed. Updates the

RX SAT, RX ST, and RSSI fields on the left hand side of the

nal Readin

s area on the displa

Note:

The M and N commands must be set prior to this

command.

R Set RX/TX

Audio TX

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.

T Set TX/RX

Audio Sens TX -xx.x

RX -xx.x Sets the audio sensitivit

for the entered TX or RX path.

The selected audio sensitivit

levels are shown in the

Audio Sens fields.

The limits for the TX and RX audio sensitivit

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.

TDMA mode functions

(

available to the TDMA mode onl

Code Command Status Action/Initial Value

G Set DVCC 01..FF

(

hexadecimal

)

Sets the Di

ital Verification Color Code

(

DVCC

)

transmitted

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 fre

uenc

H Set Slot 1..3 The TRU currentl

supports Full Rate

(

3 slots

)

codin

, that

is, three mobiles sharin

one fre

uenc

This command sets the current TDMA slot used b

the

TRU for DVCC transmission and si

nal measurements.

P Detect DVCC,

RSSI -000.0

Y/N Displa

s if current DVCC settin

is detected and/or the

RSSI measurement on the current slot of the antenna

setup. The status will be displa

ed in the RX RSSI and RX

DVCC fields.

T Standalone

TX on/off Allows the TRU2 and TRU3 to transmit without usin

sin

le-channel PA

(

see PA t

pe in Table 1-4

)

. This is used

for either low power testin

or on low power cell sites.

- End -

AMPS mode functions

(

available to the AMPS mode onl

Code Command Status Action/Initial Value

- continued -

1-36 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

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 Personalit

Allowed Descri

tion

Antenna Switch

Mode Set ASWMODE A|B

Fixed VCH Sets the antenna switch mode for the

iven

path. The path can be A

(

)

or B

(

)

. The mode is

fixed.

Blinkin

Displa

(

TRU2 onl

Set BLINKING

on|off An

Causes the front panel displa

of the TRU2 to

blink on and off if set ON.

Clear SWERR

Table Set RSETSWERR An

Clears the SWERR table and resets the current

SWERR count to zero.

Compandor

Control Set

COMPRESSION|

EXPANSION on|off

VCH Controls the d

namic ran

e compression and

expansion of the TRU compandor.

ital

Verification Color

Code

Set DVCC

dvcc_value

slot_number

TTC Sets the DVCC value for the slot specified or all

slots if ”ALL” is entered as the slot number.

Displa

Messa

(

TRU2 onl

Set DISPLAY strin

Sets the front panel displa

on the TRU2 to the

specified strin

- continued -

Nortel Networks Confidential Transmit Receive Unit (TRU) 1-37

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Name Terminal

Command Personalit

Allowed Descri

tion

DRU Reset Execute RESET An

Causes the DRU to completel

reset all of its

stems and restart processin

at the ROM

level.

DRU Restart Execute

RESTARTFLASH An

Causes the DRU to restart processin

within

the flash load.

Enable

Fullscreen Mode Set FS on VCH, CCH,

ALR, or

Maint.

Enables the Fullscreen mode of the terminal

interface.

Fault Simulation Run FAULTSIM

fault An

Simulates the specified fault b

sendin

the

fault up to the ICP.

Installation

Calibration Set INSTCAL

dB_level VCH,

CCH, or

TTC

Provides the capabilit

to correct the power

readin

(

ran

e: ± 100dB; 0.01 dB resolution

)

LAPD Timeout

Control Set LT|

LAPDTIMEOUT

on|off

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 necessar

for stand alone testin

Messa

ection Run INJECT from|to

ICP|MPA|DSP b

tes

Note:

MPA not

supported b

Urban

ects the specified messa

e trace

(

tes

)

the specified interface point in the specified

direction.

Messa

e Trace

Control Set TRACE from|to

ICP|MPA|DSP

on|off

Note:

MPA not

supported b

Urban

Enables/disables messa

e trace at the

specified interface point in the specified

direction.

MPA LED On/Off

(

Not used in

Urban

)

Set MPALED on/off An

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 compensatin

for nominal

losses or

ains as a result of cell site hardware

used with the TRU

(

ran

e: ± 100dB; 0.01 dB

resolution

)

OM Simulation Run OMSIM omt

pe An

s the occurrence of the specified OM.

- continued -

Table 1-4

Command line mode maintenance commands (continued)

1-38 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

Name Terminal

Command Personalit

Allowed Descri

tion

PA On/Off Set PA on|off VCH, CCH,

or TTC Turns the power amplifier

(

transmitter

)

on/off.

PA LED On/Off Set PALED on/off An

Turns the fault indicator LED on MCPA module

on or off.

PA T

pe Set PATYPE t

Note:

DualMode

800 Enclosure

supports onl

the

NONE mode.

VCH, CCH,

or TTC Allows for the settin

of the t

pe of PA bein

used: MPA indicates that a MPA is bein

used;

SCLPA indicates that a SCLPA is bein

used;

NONE indicates that no PA is used - the TRU is

usin

its own internal PA to output a modulated

nal.

Path Antenna

Select Set DIVPORT

path_A_port:1|2|3

path_B_port:4|5|6

VCH Establishes a ”nailed” connection for the

iven

antenna.

Receive Path

Selection Set PATH

A|B|CURRENT|DIV VCH Set the diversit

receiver to be either the A

(

)

(

)

path, or enable diversit

switchin

(

)

Receive SAT

Color Code Set RXSATCC

detector cc VCH Confi

ures 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 Fre

uenc

Select Set TXSATCC cc VCH Selects fre

uenc

to be used for SAT

eneration.

SAT Generation

On/Off Set SATGEN on|off VCH Turns on/off

eneration of supervisor

audio

tone.

Set Audio

Sensitivit

Set AUDSENS

TX|RX dBm_value VCH Sets the audio sensitivit

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

eneration to the ICRM.

Set Channel Set CHANNEL chan All but

maint. Sets the receive and transmit channel to the

iven value.

- continued -

Table 1-4

Command line mode maintenance commands (continued)

Nortel Networks Confidential Transmit Receive Unit (TRU) 1-39

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Name Terminal

Command Personalit

Allowed Descri

tion

Set Mobile

Loopback Set RFLOOP on|off VCH, CCH Enables/disables the RF loopback capabilit

the TRU.

Set Multicoupler

Gain Set MCGAIN A|B

dB_loss1 dB_loss2

dB_loss3

Sets the compensation for the

ain throu

h the

antenna and multicoupler s

stem for the

antennas connected to the specified path.

Set PA Maximum

Power Level Set MAXTXPOW

dBm_level VCH, CCH,

or TTC Sets the output power of the MCPA to the

specified dBm value with a resolution of 0.01

dB.

Set PA Power

index Set TXPOWIDX

index VCH, CCH,

or TTC Sets the MCPA power to the specified dpc

index. The index is an inte

(

from 0 to 7

)

that

corresponds to a dBm power level.

Set PA Power

Step Set TXPOWSTEP

dB_ad

ustment VCH, CCH,

or TTC Ad

usts the output power DPC stepsize of the

MCPA b

the amount specified. The power step

value can be 0 to 100 dB in steps of 0.01 dB.

Set Personalit

Set PERS

ACC|ALR|AVC|

TLR|TTC

Note:

The TRU3

supports DCCH and

TTC onl

The TRU is reset and set to the

iven

personalit

. The personalit

be IS-54 CCH,

AMPS LCR, AMPS VCH, TDMA LCR, or TDMA

TTC.

Set Transmission Set TRANSMIT

on|off VCH, CCH,

or TTC Enables/disables the transmitter in the TRU.

This command functions the same as the ”Set

PA on|off” command.

SWERR

Simulation Run SWERRSIM

class code An

s an artificial software error.

Transmitter Tone

Generation

Control

Set RFGEN on|off VCH Turns on/off

eneration of transmitter test tone.

Tx Audio On/Off Set TXAUDIO on|off VCH Turns on

(

unmute

)

or off

(

mute

)

the transceiver

audio output downstream

(

to the mobile

)

- End -

Table 1-4

Command line mode maintenance commands (continued)

1-40 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

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 Personalit

Allowed Descri

tion

Audio Sensitivit

Settin

sQuer

AUDSENS VCH The audio sensitivit

settin

s in dBm for the

transmit and receive paths.

Continuous

Status Displa

Quer

STATUS

on|off DIV|ALL|CUR

R|ST|SAT|A

VCH Enables/disables a continuous displa

channel number, RSSI, SAT, and ST of the

diversit

port or the channel number and RSSI

readin

s from each port.

ital

Verification Color

Code

Quer

DVCC TTC The DVCC status for each slot.

In TRU3, the status indicates the actual SAT

value.

Displa

SWERR

Table Quer

SWERR An

The SWERR Class, SWERR Code, and

associated information words.

Hardware

Version Number Quer

HWVERS An

The hardware release number of the TRU

bein

ueried.

MPA or PA

Firmware Version

Number

Quer

MPAFW or

PAFW An

The MPA/SCLPA firmware version number of

the DRU bein

ueried.

Note:

DualMode 800 Enclosure does not

support MPA or SCLPA.

Multicoupler Gain

Settin

sQuer

MCGAIN An

The multicoupler

ain compensation in dBm for

each antenna on both receive paths.

PA Maximum

Power Settin

Quer

MAXTXPOW VCH, CCH,

or TTC The ad

usted maximum TX power settin

dBm, stored in the TRU and the delta ad

ust

from the MCPA.

PA Power Step

Size Quer

TXPOWSTEP VCH, CCH,

or TTC The ad

usted TX power step size settin

in dB,

stored in the TRU and the delta ad

ust from the

MCPA.

- continued -

Nortel Networks Confidential Transmit Receive Unit (TRU) 1-41

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Name Terminal

Command Personalit

Allowed Descri

tion

PA status Quer

PASTATUS An

The TX information

(

PA t

pe, current power,

power reference, step size, DPC index, and

alarm status

)

bein

ueried.

Previous Uptime

Counter Quer

PREVUPTIME An

The time that the DRU had operated before the

last reset in da

s, hours, minutes.

Radio Load

status Quer

LOAD An

For obtainin

load name of the TRU.

Radio status Quer

RADIO

(

TRU3 onl

For obtainin

information on the status of the

TRU3. This information is provided throu

h an

alphanumeric displa

on the TRU2.

Reset reason Quer

RESETREASON An

When the DRU is reset, a reason code is stored

in a reserved area of memor

and can be read

when the DRU is active a

ain to

ive the

reason for the last reset. If no reason is stored,

then the reset was caused b

some unsolicited

event.

RSSI

Measurement Quer

RSSI An

In the TTC state, indicates RSSI readin

s for

each slot. In other states, indicates current

RSSI readin

at the diversit

switch.

SAT Status Quer

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 Quer

ST VCH Indicates the ST status on the receive path.

Uptime Counter Quer

UPTIME An

The time that the DRU has been operatin

since the last reset in da

s, hours, minutes.

- End -

Table 1-5

Command line mode measurement commands (continued)

1-42 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

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 Personalit

Allowed Action/Initial value

Calibration Table

Sanit

Tests

(

For

TRU2 onl

TEST EEPROM An

Calibration information is stored in EEPROM

alon

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 Sanit

Test TEST DSP ALL Maint. This test checks the basic sanit

of the DSPs

checkin

for basic messa

abilit

in each

one.

Flash Load CRC

Test TEST FLASH An

This test reads all data stored in flash

EEPROM, calculates the CRC, and compares

this value a

ainst the CRC stored in the flash

EEPROM.

Individual DSP

Sanit

Test TEST DSP dspid# Maint. This test is similar to the previous one except

that the sanit

test is onl

run on a particular

DSP chip.

RAM Read/Write

Test

(

For TRU2

onl

TEST RAM An

The read/write memor

is checked to ensure

that all locations can be written to and read, and

that each address accesses a uni

ue memor

location.

- End -

Nortel Networks Confidential Multi-Channel Power Amplifier (MCPA) 1-43

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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:

Note: Do NOT make any connections to the other pins.

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

1-44 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

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

5. The power setting menu for the MCPA will pop out (see Figure 1-11).

Figure 1-11

Power setting menu for the MCPA

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

Powerwave/Nortel Model NTFC07BB X

50W MCPA

System 100W MCPA

System Exit

Universal Enclosure System X

File CommPort Download About

Temperature 35.652 C

Current output power 59.89 Watts

Maximum available 100 Watts

output power

Watts

Target output power per channel 2.5

Channels

Number of channels 24

Firmware Version 2.1 10:22 AM

Start Initalization Shipping parameter

Program Gain Initalization

Status

Nortel Networks Confidential Multi-Channel Power Amplifier (MCPA) 1-45

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

1-46 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

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.

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.

IMPORTANT

Power to the MCPA shelf must remain on during the

downloading period.

Nortel Networks Confidential Multi-Channel Power Amplifier (MCPA) 1-47

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

• 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.

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.

1-48 Equipment operation Nortel Networks Confidential

411-2051-500 Draft 00.01 November 1999

Power setup procedure

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’.

5. At the ‘Initialization Done’ prompt, click ‘OK’. Power set up is

complete.

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.

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.

2-1

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Periodic maintenance 2

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.

2-2 Periodic maintenance

411-2051-500 Draft 00.01 November 1999

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 Bay 3

Interface

Module

ICRM

RIP1 RIP2 RIP3

DCSM

ACU

HSMO

ERMC1

ERMC2

ERMC3

CSU

DCLC

Battery Pedestal

Rectifiers

PCS

125

26 31 32 49 50 55 56

40 57

278

TRU

Shelf1

TRU

Shelf2

TRU

Shelf3

TRU

Shelf4

TRU

Shelf5

TRU

Shelf6

TRU

Shelf7

TRU

Shelf8

TRU

Shelf9

MCPA1

MCPA2

MCPA3

MCPA4

MCPA5

MCPA6

MCPA Shelf1 MCPA Shelf2 MCPA Shelf3

Legends:

ACU Alarm Control Unit HSMO High Stability Master Oscillator

CSU Channel Service Unit MCPA Multi-Channel Power Amplifier

DCLC DC Load Center PCS Power Control Shelf

DCSM DualMode Cell Site Monitor RIP Rack Interface Panel

ERMC Enhanced Receive MultiCoupler TRU Transmit Receive Unit

ICRM Integrated Cellular Remote Module

Transmission facilities 2-3

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

2-4 Periodic maintenance

411-2051-500 Draft 00.01 November 1999

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.

BatteryThe 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.)

Outside grounding 2-5

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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

2-6 Periodic maintenance

411-2051-500 Draft 00.01 November 1999

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.

Site performance 2-7

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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 channel-

indicating 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.

2-8 Periodic maintenance

411-2051-500 Draft 00.01 November 1999

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.

Schedule for periodic cell site maintenance 2-9

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

A cell site maintenance reference chart and preventive maintenance check

lists are provided in the following pages.

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

2-10 Periodic maintenance

411-2051-500 Draft 00.01 November 1999

DualMode 800 Enclosure Maintenance Reference Chart

Every

Visit Monthly Quarterly Semi-

Annual Annual Comments

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 -

DualMode 800 Enclosure Maintenance Reference Chart 2-11

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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 -

Every

Visit Monthly Quarterly Semi-

Annual Annual Comments

2-12 Periodic maintenance

411-2051-500 Draft 00.01 November 1999

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 -

Every

Visit Monthly Quarterly Semi-

Annual Annual Comments

DualMode 800 Enclosure Every Visit Checklist 2-13

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

DualMode 800 Enclosure Every Visit Checklist

Date:____________________________ Performed by:___________________________

Equipmene bays

1 Check all breakers for correct position, that is, ON/OFF on all power equipment

2 Check fuse indicators; replace fuses if necessary

3 Check receive multicoupler fuse

4 Verify that all cooling fans are working in each bay

Enclosure and site

5 Check that no high or low temperature alarm is present

6 Check that the interior lights work

7 Verify automated security system by tripping alarm (reset after test)

8 Check air filters on air exchange/conditioner equipment

9 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

2-14 Periodic maintenance

411-2051-500 Draft 00.01 November 1999

DualMode 800 Enclosure MONTHLY Checklist

Date:____________________________ Performed by:___________________________

1 Perform the EVERY VISIT routine checks

Power - Battery

2 Check the battery voltages and note any discrepancies.

3 Check terminals, connectors for signs of moisture or corrosion

Power - BCM

4 Check that the BCM output voltage is within specification

Housekeeping

5 Mop the floors at least once a month to keep dust levels to a minimum

DualMode 800 Enclosure QUARTERLY Checklist 2-15

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

DualMode 800 Enclosure QUARTERLY Checklist

Date:____________________________ Performed by:___________________________

1 Perform the EVERY VISIT routine checks

2 Perform the MONTHLY routine checks

Equipment bay

3 Voltage and Polarity checks at Main Power Terminals

Step 6 of Voltage Checks Test (See Chapter 4)

Transmission facilities

4 Perform noise and level checks on T-1 transmission facilities (optional)

2-16 Periodic maintenance

411-2051-500 Draft 00.01 November 1999

DualMode 800 Enclosure SEMI-ANNUAL Checklist

Date:____________________________ Performed by:___________________________

1 Perform the EVERY VISIT routine checks

2 Perform the MONTHLY routine checks

3 Perform QUARTERLY routine checks

DualMode 800 Enclosure ANNUAL Checklist 2-17

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

DualMode 800 Enclosure ANNUAL Checklist

Date:____________________________ Performed by:___________________________

1 Perform the EVERY VISIT routine checks

2 Perform the MONTHLY routine checks

3 Perform QUARTERLY routine checks

4 Perform SEMI-ANNUAL routine checks

Equipment bays

5 Test TRU and MCPA for power output

TRU Output Power Test

6 Test the ACU alarm input points

Alarm Control Unit Tests

7 Check the Insertion Loss of the Transmit Path

Insertion Loss

8 Check HSMO Frequency on mixed or all dual mode sites

Oscillator Frequency Test

Power - Rectifiers

9 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 -

2-18 Periodic maintenance

411-2051-500 Draft 00.01 November 1999

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 -

DualMode 800 Enclosure ANNUAL Checklist 2-19

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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 -

2-20 Periodic maintenance

411-2051-500 Draft 00.01 November 1999

3-1

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Test equipment and precautions 3

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:

3-2 Test equipment and precautions

411-2051-500 Draft 00.01 November 1999

– 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.

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

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

2 3 2 3 TX from DRU

3 2 3 5 RX to DRU

7754Ground

Precautions 3-3

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

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)

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.

3-4 Test equipment and precautions

411-2051-500 Draft 00.01 November 1999

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.

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

RF radiation hazard

Do NOT disconnect any RF cables when transmitters are on.

CAUTION

Equipment damage

When in doubt, any circuit board containing microelectronic

components must be assumed to be vulnerable.

Precautions 3-5

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

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 electrostatic-

discharge-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

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.

3-6 Test equipment and precautions

411-2051-500 Draft 00.01 November 1999

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.

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

CAUTION

Equipment damage

At no time must an unprotected circuit board come in contact

with clothing, plastics, or ungrounded personnel.

Precautions 3-7

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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)

3-8 Test equipment and precautions

411-2051-500 Draft 00.01 November 1999

4-1

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Power-up procedure 4

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

1 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.

2 Verify that the lugs have been installed

correctly and, if terminated on aluminum

busbars, have been treated with anti-oxidant.

3 Verify that the minimum bending radius has

not been exceeded on the power cables (see

Table 4-1).

4-2 Power-up procedure

411-2051-500 Draft 00.01 November 1999

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.

4 Verify that the breaker positions on the power

bay have been labeled and are cabled as

indicated on the labels.

Note:

See Tables 5-12 to 5-4 for the RIP

breaker panel assignments.

5 Verify that the equipment bays are bonded to

the principle ground bar line-up feeder with a

#6 AWG jumper.

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

Step Action Observation

Voltage checks 4-3

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Note: All breakers are rated at a potential of 65 Vdc.

Table 4-2

RIP1 circuit breaker assignments and ratings

1234567891011

12 13 14 15 16 17 18 19 20 21 22 23 24

MCPA 1-1

TRU 1A

TRU 2A

TRU 3A

ICRM A

CSU A

Not used

LVD 1A

TCU 1A

TCU 1B

LVD 1B

Not used

Bay 1 Light

CSU B

ICRM B

TRU 3B

TRU 2B

TRU 1B

MCPA 1-2

80A

10A

20A

—

20A

—

20A

10A

80A

Table 4-3

RIP2 circuit breaker assignments and ratings

1234567891011

12 13 14 15 16 17 18 19 20 21 22 23 24

MCPA 2-1

TRU 4A

TRU 5A

TRU 6A

Not used

LVD 2A

TCU 2A

TCU 2B

LVD 2B

Not used

IM Light

Bay 2 Light

TRU 6B

TRU 5B

TRU 4B

MCPA 2-2

80A

10A

—

20A

—

10A

80A

Table 4-4

RIP3 circuit breaker assignments and ratings

1234567891011

12 13 14 15 16 17 18 19 20 21 22 23 24

MCPA 3-1

TRU 7A

TRU 8A

TRU 9A

ACU A

ACU BIAS

DCSM

HSMO A

ERMC A

Not used

LVD 3A

TCU 3A

TCU 3B

LVD 3B

Not used

Bay 3 Light

ERMC B

HSMO B

ACU BIAS

ACU B

TRU 9B

TRU 8B

TRU 7B

MCPA 3-2

80A

10A

20A

10A

—

20A

—

10A

80A

Step Action Observation

1 Turn OFF the breakers on the RIP panel and to

the cell site equipment.

2 Unplug all the TRUs and the MCPA modules

from their respective shelves.

4-4 Power-up procedure

411-2051-500 Draft 00.01 November 1999

3 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.

4 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

5 Turn ON the mains breakers assigned to the

cell site equipment and the RIP breakers.

6 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)

+26.5 to 29 Vdc

7 Turn ON the breakers on the breaker RIP panel

8 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

+26.5 to 29 Vdc

9 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.

Step Action Observation

5-1

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Master Oscillator tests 5

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.

5-2 Master Oscillator tests

411-2051-500 Draft 00.01 November 1999

Oscillator power level test

See Figure 5-1 for set-up.

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.

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.

Step Action Observation

1 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.

2 Measure the output of the master oscillator

and record on the test form. -1 dBm ±3 dB

Step Action Observation

1 Using a frequency counter, measure the

oscillator frequency at outputs 1 to 16 at the

rear of the shelf.

HSMO output frequency: 4.8 MHz ±1.2 Hz

Reference oscillator tests 5-3

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Figure 5-1

Oscillator power level and frequency test setup

Diversity Receive

Main

Transmit / Receive

MCPAs

TRU Shelf

Other TRU

Shelves

Other TRU

Shelves LNA Preselect

Filter

Receive Multicoupler

1:8 Splitters

1:8

Splitter

LNA

Duplexer

RX Bandpass

Filter

TX Bandpass

Filter

TRU 8

TRU 2

TRU 7

TRU 1

1:8

Splitter Preselect

Filter

Receive Multicoupler

Integrated

Cellular

Remote

Module

(ICRM)

Data

MTX

Voice

Alarm

Inputs Outputs

Other TRU

Shelves

Alarm

Control Unit

High Stability

MasterOscillator

Data

•••• • •

Communications Monitor (IFR 1600)

INTENSIT

POWER

DUPLEX

OUT

F1 F2 F3 F4 F6F5

MODE

ANTENNA

FM /AM 1600S

AUX

FM/AM

1600S

65W

MAX

65W

MAX

APPLIED

RCVR

DPLX

SCOPE

MTRS

AUTO

SGL

STOP

HOLD

SETUP

STORE

DEL

SHIFT

RCL

Enter

TESTCONTROL

DATAENTRY

MEMORY EDIT SQLCH VOL

FIELD SELECT

< >

MIC/ACC SINAD AUDIO DEMOD VΩCOM AMP SCOPE T/R

IN/OUT IN IN OUT OUT 1KVDC/500V

AC MAX 2 AMPS

MAX

200 VDC

MAX

200W

MAX

IN/OUT

BER

DMM

DATASCROLL

EXT MOD

STEP

SCRN

GEN

ANLZ

Sniffer

VT100

4:1 Combiner

MCPA Shelf

Combiner

5-4 Master Oscillator tests

411-2051-500 Draft 00.01 November 1999

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.

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

• -165 to +365 Hz questionable

• beyond above swap

Step Action Observation

1 Ensure that the communication monitor can

listen to the TRU under test by either the

sniffer or through an antenna.

2 Set the communication monitor to monitor

the forward channel under test.

3 Use the frequency meter/frequency error

meter to measure the offset. ±220 Hz of the assigned frequency

4 Record the assigned frequency (in MHz) and

the frequency error (in Hz) on the test forms.

5 If the results are questionable then repeat for

at least one more transceiver.

Oscillator frequency test procedure using TRUs 5-5

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Figure 5-2

Oscillator frequency test setup — transceiver carrier method

Diversity Receive

Main

Transmit / Receive

TRU Shelf

Other TRU

Shelves

Other TRU

Shelves LNA Preselect

Filter

Receive Multicoupler

1:8 Splitters

1:8

Splitter

LNA

Duplexer

RX Bandpass

Filter

TX Bandpass

Filter

TRU 8

TRU 2

TRU 7

TRU 1

1:8

Splitter Preselect

Filter

Receive Multicoupler

Integrated

Cellular

Remote

Module

(ICRM)

Data

MTX

Voice

Alarm

Inputs Outputs

Other TRU

Shelves

Alarm

Control Unit

High Stability

MasterOscillator

Data

•••• • •

Communications Monitor (IFR 1600)

INTENSIT

POWER

DUPLEX

OUT

F1 F2 F3 F4 F6F5

MODE

ANTENNA

FM /AM 1600S

AUX

FM/AM

1600S

65W

MAX

65W

MAX

APPLIED

RCVR

DPLX

SCOPE

MTRS

AUTO

SGL

STOP

HOLD

SETUP

STORE

DEL

SHIFT

RCL

Enter

TESTCONTROL

DATAENTRY

MEMORY EDIT SQLCH VOL

FIELD SELECT

< >

MIC/ACC SINAD AUDIO DEMOD VΩCOM AMP SCOPE T/R

IN/OUT IN IN OUT OUT 1KVDC/500V

AC MAX 2 AMPS

MAX

200 VDC

MAX

200W

MAX

IN/OUT

BER

DMM

DATASCROLL

EXT MOD

STEP

SCRN

GEN

ANLZ

Sniffer

VT100

Combiner MCPAs

5:1 Combiner

MCPA Shelf

5-6 Master Oscillator tests

411-2051-500 Draft 00.01 November 1999

6-1

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Antenna and transmission line tests 6

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).

CAUTION

RF Radiation Hazard

All transceiver transmitters must be turned off before

disconnecting or connecting transmit cables to avoid RF

induced injuries.

6-2 Antenna and transmission line tests

411-2051-500 Draft 00.01 November 1999

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

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).

Step Action Observation

1 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.

2 Inside the building, measure the DC

resistance of the outer conductor to the

principle ground.

Less than or equal to 0.5 Ω

3 Measure and record the DC resistance of the

center conductor (pin)to the outer

conductor(shield).

4 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.

CAUTION

This test is service affecting when the antenna is disconnected.

Antenna return loss 6-3

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Figure 6-1

Antenna return loss block diagram

Step Action Observation

1 Connect the signal generator, the spectrum

analyzer and a 50 ohm load to the VSWR

bridge.

See Figure 6-1.

2 Set the signal generator output level to 0

dBm.

3 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.

4 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.

Return loss should be greater than 35 dB

over the bands.

5 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.

6 Record the minimum return loss of the

antenna and transmission line in the system. 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)

7 Repeat the test for each antenna installed for

the cell site.

8 If the test fails, check the antenna matching,

cables and connectors.

6-4 Antenna and transmission line tests

411-2051-500 Draft 00.01 November 1999

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.

Antenna sweep

This is a service affecting test. Ensure that all transmitters are OFF before

disconnecting the antenna cable.

Step Action Observation

1 Connect the Thruline between the duplexer

and the antenna.

2 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

Step Action Observation

1 Set up and calibrate a network analyzer

(HP8753C or equivalent) to sweep 823 to

895 MHz.

2 Notify the Control Center to OFFLINE the

cell site.

3 Disconnect the antenna jumper cable.

(Located at the duplexer for the tx/rx antenna

or at the RMC for the diversity receive

antenna.)

- continued -

Antenna sweep 6-5

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

4 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.

5 Do a TDR sweep of the antenna. Print a hard

copy of the lower left quadrant.

6 Do a SWR sweep of the antenna. Print a

hardcopy of the upper quadrant. The result

should not be higher than 1.5:1

7 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).

8 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 -

Step Action Observation

6-6 Antenna and transmission line tests

411-2051-500 Draft 00.01 November 1999

7-1

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Enhanced Receive Multicoupler (ERMC)

tests 7

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

1 Notify the Control Center to OFFLINE the

cell site.

2 Disconnect the antenna feed cables from the

selectivity filter inputs.

3 Disconnect the cable from the ERMC splitter

port to be tested.

4 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.

5 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 -

7-2 Enhanced Receive Multicoupler (ERMC) tests

411-2051-500 Draft 00.01 November 1999

Note: If an irregularity in the ERMC gain exists, call Nortel Networks RF

Engineering Support for assistance.

6 Set up the communications monitor to output

an RF signal less than -60 dBm sweeped

from 824 to 849 MHz.

7 Using the communication monitor in

spectrum analyzer mode sweep the RMC

and note any irregularities in the gain.

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.

8 Repeat for all splitter ports and for both A

and B diversity paths.

9 Replace the antenna feed and splitter output

cables and then inform the Control Center to

RTS the Cell Site.

- End -

Step Action Observation

ERMC overall gain measurement test 7-3

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Figure 7-1

RMC overall gain measurement test

RMC Input Preselect Filter A

7-4 Enhanced Receive Multicoupler (ERMC) tests

411-2051-500 Draft 00.01 November 1999

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.

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.

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 7-5

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Figure 7-2

Talk-In/Talk-out call setup

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

1 At the MTX place an idle TRU in the off-line

state. The TRU will be in the idle state.

2 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.

3 At the cell site test TRU, connect a terminal

and place in the debug mode. See Terminal

Interface Operation in Chapter 1.

4 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.

5 Set the test TRU, to the same channel as the

one with the call on it from the mobile. TRU will display same channel.

6 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 -

MTX DMS

Cell site

Equipment

Mobile Monitoring

RSSI

7-6 Enhanced Receive Multicoupler (ERMC) tests

411-2051-500 Draft 00.01 November 1999

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.

7 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 -

Step Action Observation

8-1

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Alarm Control Unit (ACU) tests 8

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

1 Set up the terminal as per the requirements

to the right. BAUD Rate: TX 9600

RX 9600

Scroll: smooth

Auto repeat: on

ANSI

Auto Wrap: off

Receiver Parity: ignore

Parity: disabled

Character Bits: 8 bits

Interface: on

Scroll Key: VT100

Form Feed: line feed

Control Characters: executed

Local Echo: off

RTS-CTS Handshake: off

8 Bits Tx: space

- continued -

8-2 Alarm Control Unit (ACU) tests

411-2051-500 Draft 00.01 November 1999

Figure 8-1

ACU First maintenance screen

2 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.

3 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.

4 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

5 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

6 Open and close each selected output and

verify its action by observing an open or

short on the rear output connector, J8.

- End -

Step Action Observation

Alarm Control Unit test setup 8-3

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Figure 8-2 shows the pin assignments of a typical alarm connector.

Figure 8-2

Typical alarm connector (36-Pin)

8-4 Alarm Control Unit (ACU) tests

411-2051-500 Draft 00.01 November 1999

9-1

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Performing tests using a DCSM 9

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

9-2 Performing tests using a DCSM

411-2051-500 Draft 00.01 November 1999

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

Performing tests using the DCSM in the directed mode 9-3

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

9-4 Performing tests using a DCSM

411-2051-500 Draft 00.01 November 1999

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).

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)

Procedure 9-1

Posting the DCSM

Step Action Observation

1 At the MAP terminal, post the DCSM by entering:

>MAPCI;MTC;MTX;CELL <cell_number>

>CTU;POST <DCSM_number>

2 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

Performing tests using the DCSM in the directed mode 9-5

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

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.

Procedure 9-2

Control Channel test set-up

Step Action Observation

1 At the MAP terminal, post the DCSM by entering:

>MAPCI;MTC;MTX;CELL <cell_number>

>CTU;POST <DCSM_number>

2 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

3 Post the Control Channel to be tested by entering:

>CCH;POST <channel_number>

4 Make sure that the posted CCH is in the INSV state. If not, place

the CCH to the INSV state by entering:

>BSY;RTS

5 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 <x, y, z, u, v, or w>,<A,D,BOTH>

(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

6 The DCSM is now ready to test the desired CCH.

9-6 Performing tests using a DCSM

411-2051-500 Draft 00.01 November 1999

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.

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 9-3

Measuring forward CCH RF power

Step Action Observation

1 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.

2 At the CCH LEVEL OF THE MAP, enter:

>TST POWER

Procedure 9-4

Measuring reverse CCH RF power

Step Action Observation

1 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.

2 At the CCH LEVEL OF THE MAP, enter:

>TST RSSI

Performing tests using the DCSM in the directed mode 9-7

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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

1 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.

2 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 <x, y, z, u, v, or w>, <A,D,BOTH>

(Sector Designation), (ACCH, DCCH, or Both)

A = monitor ACCH

only

D = monitor DCCH

only

Both = monitor both

CCH types

3 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

9-8 Performing tests using a DCSM

411-2051-500 Draft 00.01 November 1999

Querying ACCH OMT parameters

The DCSM can also be queried for the latest ACCH OMT parameters (see

Procedure 9-6).

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 9-6

Querying ACCH OMT parameters

Step Action Observation

1 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.

2 At the ACCH level of the MAP position enter:

>TST CCHOMT

3 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.

Procedure 9-7

Querying the DCSM parameters

Step Action Observation

1 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.

2 At the DCCH level of the MAP position enter:

>TST DCCHPARM <option>{F,E,ALL}

Options:

F - request is for

FBCCH parameters

E - request is for

EBCCH parameters

ALL - request is for

FBCCH and EBCCH

parameters

3 The system responds by generating an MTX170 log. Check the log

values reported against the system datafill.

Performing tests using the DCSM in the directed mode 9-9

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

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

Table 9-1

Naming convention of the MTX trunk tests

Letter # Designation

1 M = MTX — test a MTX VCH trunk

D = DCCH — set-up VCH trunk

2 A = Audio — test the audio link of the trunk

(DCSM is not a requirement)

R = RF — test the RF link of the trunk

3 L = Low — use a low level tone for the test

H = High — use a high level tone for the test

4 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.

9-10 Performing tests using a DCSM

411-2051-500 Draft 00.01 November 1999

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

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.

DCSM

DUT

TTT

Loop Loss (measured)

NM Network

DRU or BST

Far-to-near loss (measured)

Tone injected

Tone measured

and Loop Noise

level (dBrn)

(MTX Switch)

Cell Site

()

Near to Far Loss (Calculated)

Performing tests using the DCSM in the directed mode 9-11

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Figure 9-2

MALT Test Output MTX303 Log

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

Procedure 9-8

Initiating the MALT/MAHT test

Step Action Observation

1 Go to the MAP level of the MTX radio (VCH) to be

tested:

(example) MAPCI;MTC;MTX;CELL 100;VCH

2 Post the radio to be tested:

(example) POST 2

3 Invoke the MALT/MAHT test on the posted radio:

TST MALT or TST MAHT

The MTX will indicate that the test is

underway.

4 Wait for the results of the MALT/MAHT test. The

MTX will display them once the test is complete. See Figure 9-2.

5 If the results fail check that the CTTPARMS fields

are correctly datafilled. Then repeat the test to

verify the failure.

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

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

9-12 Performing tests using a DCSM

411-2051-500 Draft 00.01 November 1999

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.

Performing tests using the DCSM in the directed mode 9-13

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Figure 9-4

MRLT and MRHT CTTPARMS fields

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

1 Go to the MAP level of the MTX radio (VCH) to be

tested:

(example) MAPCI;MTC;MTX;CELL 100;VCH

2 Post the radio to be tested:

(example) POST 2

3 Invoke the MRLT/MRHT test on the posted radio:

TST MRLT or TST MRHT

The MTX will respond

that the test is underway.

4 Wait for the results of the MRLT/MRHT test. The

MTX will display them once the test is complete. See Figure 9-5.

5 If the results fails check to see if the CTTPARMS

fields are correctly set.Then repeat the test to

verify the failure.

DCSM

DUT

TTT

NM Network

DRU or BST

RF path

Loop Loss Measured

Far-to-Near Loss Measured

Tone Injected

Tone Measured

and Loop Noise

level dBrn

9-14 Performing tests using a DCSM

411-2051-500 Draft 00.01 November 1999

Figure 9-5

MRLT Test Output MTX303 Log

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

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.

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

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

Performing tests using the DCSM in the directed mode 9-15

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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

DCSM

DUT

TTT

NM Network

DRU or BST

RF path

The TTT measures

the tone level

RSSI Measured

The DCSM measures

the RSSI of the Near-

to-far on-air link.

Tone transmitted

9-16 Performing tests using a DCSM

411-2051-500 Draft 00.01 November 1999

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.

Figure 9-8

MRLP Test results MTX302 Log

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)

• Power Amplifier

Procedure 9-10

Initiating the MRLP test

Step Action Observation

1 Go to the MAP level of the MTX radio (VCH) to be

tested:

(example) MAPCI;MTC;MTX;CELL 100;VCH

2 Post the radio to be tested:

(example) POST 2

3 Invoke the MRLP test on the posted radio:

TST MRLP

The MTX will respond

that the test is underway.

4 Wait for the results of the MRLP test. The MTX

will display them once the test is complete. See Figure 9-8.

5 If the results fails check to see if the CTTPARMS

fields are correctly set. Then repeat the test to

verify the failure.

MTX302 JUN29 12:12:12 2500 CTT RF POWER TEST

CELL: 20x TEST: MRLP VCH: 10 HW: BST

VPL : 0 Tx PWR: -50 dBm EXP PWR: -58 dBm

Q1PWR: 0 dB Q2PWR: 2 dB

PASS

Performing tests using the DCSM in the directed mode 9-17

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

• Combiner

• ICRM packs (the AX50s, AX47s, AX87s)

• T1 transmission equipment used

• ICP cards (the AX50s, AX27s)

•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.

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 9-

9 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.

9-18 Performing tests using a DCSM

411-2051-500 Draft 00.01 November 1999

Figure 9-9

MRLR Test Measurements

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

1 Go to the MAP level of the MTX radio (VCH) to be

tested:

(example) MAPCI;MTC;MTX;CELL 100;VCH

2 Post the radio to be tested:

(example) POST 2

3 Invoke the MRLR test on the posted radio:

TST MRLR

The MTX will respond

that the test is underway.

4 Wait for the results of the MRLR test. The MTX

will display them once the test is complete. See Figure 9-10.

5 If the results fails check to see if the CTTPARMS

fields are correctly set. Then repeat the test to

verify the failure.

DCSM

DUT

TTT

NM Network

DRU or BST

RF path

The TTT measures

the tone level

The DUT measures

the RSSI of the Far-

to-near on-air link.

RSSI measured

Tone transmitted

Performing tests using the DCSM in the directed mode 9-19

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Figure 9-10

MRLR Test results MTX302 Log

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.

MTX302 JUN29 12:12:12 2500 CTT RF POWER TEST

CELL: 20x TEST: MRLR VCH: 10 HW: BST

VPL : 0 Tx PWR: -50 dBm EXP PWR: -58 dBm

Q1PWR: 0 dB Q2PWR: 2 dB

PASS

9-20 Performing tests using a DCSM

411-2051-500 Draft 00.01 November 1999

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

1 At the VCH MAP level enter:

TST DTRM or TST MTRM

The MAP terminal will respond with an MTX301 Log

displaying the results of the DCCH or ACCH call setup.

10-1

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

10-2 ICRM tests

411-2051-500 Draft 00.01 November 1999

11-1

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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 (DMS-

MTX). 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 DSP-

based 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, non-

corrupt, 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.

11-2 DRU tests

411-2051-500 Draft 00.01 November 1999

Figure 11-1

Front panel layout of the TRU2 (NTAX98AA)

Figure 11-2

Front panel layout of the TRU3 (NTAW99AA)

RS-232 port for the

Terminal Interface

connector

Handle

Status LEDs

Functionality of the DRU 11-3

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Figure 11-3

MCPA front panel layout

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

OFFON

Pwr

Low

DISAB.

Alarms

Off

RF ON

-5VDC

Reset

Pwr

LPA

+5VDC Loop

Fail

Fan

Fail

+15VDC

+27VDC

VSWR

High

Temp

Over

Status

11-4 DRU tests

411-2051-500 Draft 00.01 November 1999

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.

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.

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.

Test equipment required 11-5

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

11-6 DRU tests

411-2051-500 Draft 00.01 November 1999

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

3. To place the TRU into the fullscreen monitor mode, enter:

>SET LT OFF (disables the LAPD timeout)

>SET FS ON (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.

DRU configurations for analog tests 11-7

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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 RS-

232 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)

>SET PATYPE NONE (configures TRU to the modulated mode for no per-

carrier PA application)

>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:

The PA field on the screen should show:

PA: off

Compandor

If the Compandor is off, turn it on by entering:

The Compandor field on the screen should show:

Compandor: on

SAT Transmit

If the SAT TX is on, turn it off by entering:

The SAT TX field on the screen should show:

SAT TX: 6000 (off)

11-8 DRU tests

411-2051-500 Draft 00.01 November 1999

Table 11-1

DRU configurations for analog tests

Commands G I J K L P N M E U F C R T

TX Tests Initial Setup

TRU Configurations Receive Status TRU Power Settings TX/RX Audio

Audio

Status Audio

Sens

Max

Power Carrier

On/Off

Power

Index Power

Step

Antenna

Path Receive

Ports

Wide

Band

Data

Detect

SAT, ST,

RSSI

Loop

back Compan-

dor

SAT

TX Tone

Gen

OFF

OFFOFF

OFF

RSSI

SAT

OFF

1 4

15.0

OFF

TX RX

OFF

-18.0

TX Carrier Frequency

Wideband Modulation

SAT Transmit

Residual Modulation

TX Audio Level

Modulation Limiting

1 kHz Tone Gen

End of TX Tests

RX Tests Initial Setup

Receive Sensitivity

RX/TX Audio Sens

RX Audio Level

RSSI Detect

SAT Detect

ST Detect

End of RX Tests

Power Test Initial Setup

TRU Power Output

End of Power Test

DRU configurations for analog tests 11-9

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Loopback

If the Loopback status is either BCH or RF, turn it off by entering:

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:

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:

The TRU will request an antenna path choice (either A, B or DIV). To select

Path A, enter:

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:

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

11-10 DRU tests

411-2051-500 Draft 00.01 November 1999

Transmit Power Level Index

If the TxPwrIndex status is not 0, set it to 0 by entering:

The TRU will request a specific power level (0..7). To set power level to 0,

enter:

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:

The TRU will request a power step size (1..4 in 0.25 dB increments). To set

power step size to 4, enter:

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:

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:

The DRU will request for either ‘TX’, ‘RX’, ‘BOTH’ or ‘OFF’. Enter:

>OFF

The Audio field on the screen should show:

Audio: off

DRU configurations for analog tests 11-11

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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:

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:

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

11-12 DRU tests

411-2051-500 Draft 00.01 November 1999

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.

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

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.

WARNING

RF radiation hazard

Do NOT disconnect any RF cables when transmitters are on.

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.

DRU transmit tests 11-13

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

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.

The PA status on the screen will change to:

PA: on

7. Proceed with the transmit tests.

11-14 DRU tests

411-2051-500 Draft 00.01 November 1999

Figure 11-4

DRU transmit tests setup (service affecting)

Diversity Receive

Main

Transmit / Receive

TRU Shelf

Other TRU

Shelves

Other TRU

Shelves LNA Preselect

Filter

Receive Multicoupler

1:8 Splitters

1:8

Splitter

LNA

Duplexer

RX Bandpass

Filter

TX Bandpass

Filter

TRU 8

TRU 2

TRU 7

TRU 1

1:8

Splitter Preselect

Filter

Receive Multicoupler

Integrated

Cellular

Remote

Module

(ICRM)

Data

MTX

Voice

Alarm

Inputs Outputs

Other TRU

Shelves

Alarm

Control Unit

High Stability

MasterOscillator

Data

•••• • •

Communications Monitor (IFR 1600)

INTENSIT

POWER

DUPLEX

OUT

F1 F2 F3 F4 F6F5

MODE

ANTENNA

FM /AM 1600S

AUX

FM/AM

1600S

65W

MAX

65W

MAX

APPLIED

RCVR

DPLX

SCOPE

MTRS

AUTO

SGL

STOP

HOLD

SETUP

STORE

DEL

SHIFT

RCL

Enter

TESTCONTROL

DATAENTRY

MEMORY EDIT SQLCH VOL

FIELD SELECT

< >

MIC/ACC SINAD AUDIO DEMOD VΩCOM AMP SCOPE T/R

IN/OUT IN IN OUT OUT 1KVDC/500V

AC MAX 2 AMPS

MAX

200 VDC

MAX

200W

MAX

IN/OUT

BER

DMM

DATASCROLL

EXT MOD

STEP

SCRN

GEN

ANLZ

Sniffer

VT100

Combiner MCPAs

4:1 Combiner

MCPA Shelf

DRU transmit tests 11-15

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Transmit Carrier Frequency test

This test ensures that the TRU is transmitting at 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

1 Ensure that the TRU configurations are as

listed in Table 11-1 for the Transmit Carrier

Frequency test.

2 Check the transmit carrier frequency on the

communications monitor. The frequency

error (FREQ ERR) is also shown on some

communications monitors.

±220 Hz of the assigned frequency.

3 Record the assigned frequency (in MHz) and

the frequency error (in Hz) on the test forms.

Step Action Observation

1 Ensure that the TRU configurations are as

listed in Table 11-1 for the Wideband

Modulation test.

2 From the interface terminal, use the L

command to select Wideband Data.

TRU begins to transmit wide band data and

the screen shows:

continuing Wideband Data TX..

(press return to quit)

3 Check the carrier frequency deviation as

displayed on DEV (deviation) meter. Deviation between 7.2 kHz and 8.8 kHz.

4 Record the deviation on the test forms.

5 Press the “Return” key to stop the wideband

data transmission. TRU stops transmitting wide band data and

the screen shows:

Wideband data is off

11-16 DRU tests

411-2051-500 Draft 00.01 November 1999

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

1 Ensure that the TRU configurations are as

listed in Table 11-1 for the SAT Transmit test.

2 From the interface terminal, use the G

command to turn on the SAT.

The screen shows:

SAT TX: 6000 (on)

3 Check the SAT frequency as displayed on

the AF (frequency) meter. SAT frequency should be 6000 Hz ±5 Hz.

4 Check the SAT carrier frequency deviation as

displayed on the deviation (DEV) meter. Deviation between 1.8 kHz and 2.2 kHz.

5 Record the frequency and the deviation on

the test forms.

6 Use the H command to input a different SAT

frequency.

The terminal will prompt with:

Enter a SAT frequency (5970,

6000, or 6030)

7 Select 5970 Hz SAT frequency by entering:

>5970

The screen shows:

SAT TX: 5970 (on)

8 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.

9 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.

The screen shows:

SAT TX: 6030 (off)

DRU transmit tests 11-17

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

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

1 Ensure that the TRU configurations are as

listed in Table 11-1 for the Residual

Modulation test.

2 Check the carrier frequency deviation as

displayed on the DEV meter. Deviation between -0.5 kHz and +0.5 kHz.

3 Record the deviation on the test forms.

Step Action Observation

1 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.

2 From the interface terminal, use the R

command to turn on (unmute) the TX audio.

The terminal will prompt for audio path:

Enter TX, RX, BOTH or OFF

3 Enter the option “TX”:

>TX

The Audio status on the screen shows:

Audio: TX

- continued -

11-18 DRU tests

411-2051-500 Draft 00.01 November 1999

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.

4 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.

5 Check the carrier frequency deviation as

displayed on the DEV meter. Deviation between 2.61 kHz and 3.19 kHz.

6 Record the deviation on the test forms.

7 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)

8 From the interface terminal, use the R

command to turn off (mute) the TX audio.

The terminal will prompt for audio path:

Enter TX, RX, BOTH or OFF

9 Enter the option “OFF”:

>OFF

The audio status on the screen shows:

Audio: off

- End -

Step Action Observation

DRU transmit tests 11-19

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Step Action Observation

1 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.

2 From the interface terminal, use the R

command to turn on (unmute) the TX audio.

The terminal will prompt for audio path:

Enter TX, RX, BOTH or OFF

3 Enter the option “TX”:

>TX

The Audio status on the screen shows:

Audio: TX

4 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 1004 -100..........

TGEN 1004 -50...........

TGEN 1004 0.............

TGEN 1004 10............

TGEN 1004 20............

TGEN 1004 30............

TGEN 1004 50............

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.

5 Check the maximum carrier frequency

deviation as displayed on the DEV meter. Deviation must be less than 12.0 kHz at all

levels.

6 Record the maximum deviation obtained on

the test forms.

7 On the MAP position terminal, enter:

>RLS

The MAP screen will indicate that the trunk is

released and returns to its original state.

8 From the interface terminal, use the R

command to turn off (mute) the TX audio.

The terminal will prompt for audio path:

Enter TX, RX, BOTH or OFF

9 Enter the option “OFF”:

>OFF

The Audio status on the screen shows:

Audio: off

11-20 DRU tests

411-2051-500 Draft 00.01 November 1999

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

1 Ensure that the TRU configurations are as

listed in Table 11-1 for the 1 kHz Tone Gen

test.

2 From the interface terminal, use the I

command to generate an on-channel 1 kHz

tone at 8 kHz deviation.

The TRU will prompt for the antenna path

choice:

Enter BCH, RF, or OFF

3 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

4 Check the 1 kHz Tone Gen frequency as

displayed on the AF meter. The frequency should be 1000 Hz ±1 Hz.

5 Check the carrier frequency deviation as

displayed on the DEV meter. Deviation between 7.2 kHz and 8.8 kHz.

6 Record the frequency and the deviation on

the test forms.

7 Use the I command to turn off the on-

channel 1 kHz tone at 8 kHz deviation.

The TRU will prompt for the antenna path

choice:

Enter BCH, RF, or OFF

8 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

DRU transmit tests 11-21

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

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.

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.

At the command prompt, perform a warm reset on the TRU by entering:

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.

11-22 DRU tests

411-2051-500 Draft 00.01 November 1999

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.

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

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.

WARNING

RF radiation hazard

Do NOT disconnect any RF cables when transmitters are on.

CAUTION

Service interruption

The service of the shelf housing the TRU under test will be

affected. Perform the tests during low traffic period.

DRU receive tests 11-23

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

11-24 DRU tests

411-2051-500 Draft 00.01 November 1999

Figure 11-5

DRU receive tests setup (shelf/site service affecting)

Diversity Receive

Main

Transmit / Receive

TRU Shelf

Other TRU

Shelves

Other TRU

Shelves LNA Preselect

Filter

Receive Multicoupler

1:8 Splitters

1:8

Splitter

LNA

Duplexer

RX Bandpass

Filter

TX Bandpass

Filter

TRU 8

TRU 2

TRU 7

TRU 1

1:8

Splitter Preselect

Filter

Receive Multicoupler

Integrated

Cellular

Remote

Module

(ICRM)

Data

MTX

Voice

Alarm

Inputs Outputs

Other TRU

Shelves

Alarm

Control Unit

High Stability

MasterOscillator

Data

•••• • •

Communications Monitor (IFR 1600)

INTENSIT

POWER

DUPLEX

OUT

F1 F2 F3 F4 F6F5

MODE

ANTENNA

FM /AM 1600S

AUX

FM/AM

1600S

65W

MAX

65W

MAX

APPLIED

RCVR

DPLX

SCOPE

MTRS

AUTO

SGL

STOP

HOLD

SETUP

STORE

DEL

SHIFT

RCL

Enter

TESTCONTROL

DATAENTRY

MEMORY EDIT SQLCH VOL

FIELD SELECT

< >

MIC/ACC SINAD AUDIO DEMOD VΩCOM AMP SCOPE T/R

IN/OUT IN IN OUT OUT 1KVDC/500V

AC MAX 2 AMPS

MAX

200 VDC

MAX

200W

MAX

IN/OUT

BER

DMM

DATASCROLL

EXT MOD

STEP

SCRN

GEN

ANLZ

Sniffer

VT100

•••• • •

Combiner MCPAs

4:1 Combiner

MCPA Shelf

DRU receive tests 11-25

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

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.

Step Action Observation

1 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.

2 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.

Loopback field shows: RF

Audio status field shows: TX RX

PA status field shows: ON

3 Select the SINAD meter on the

communications monitor.

4 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.

5 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

6 Record the RF signal level on the test forms.

11-26 DRU tests

411-2051-500 Draft 00.01 November 1999

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

1 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.

2 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.

Loopback field shows: RF

Audio status field shows: TX RX

PA status field shows: ON

3 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.

4 Check the frequency deviation on the

transmit side of the DRU under test. The deviation must be:

between 2.60 kHz and 3.20 kHz.

5 Record the deviation on the test forms.

Step Action Observation

1 Ensure that the DRU configurations are as

listed in Table 11-1 for the RX Audio Level

test.

2 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

3 Use the R command to turn on the RX audio.

The DRU will prompt for the audio path:

Enter TX, RX, BOTH, or OFF

- continued -

DRU receive tests 11-27

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

4 Enter the “RX” option to turn on the RX

audio.

>RX

The Audio status on the screen shows:

Audio: RX

5 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.

6 This step is performed at the MTX.

From the MAP position or with a second

terminal logged into the switch the trunk that

is assigned to the DRU being tested, enter:

MAPCI;MTC;TRKS;TTP;POST (CLLI name)

(Trunk member number);LOSS

MAP Trunk Test Position is displayed. The

MAP screen will indicate the trunk member

selected and that the trunk is seized.

It will also indicate the tone received and the

level of the tone.

7 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.

8 Record the audio level on the test forms.

9 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.

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 -

Step Action Observation

11-28 DRU tests

411-2051-500 Draft 00.01 November 1999

Step Action Observation

1 Ensure that the DRU configurations are as

listed in Table 11-1 for the RSSI detect test.

2 Using the communications monitor, apply a

-60 dBm on-channel RF signal to the DRU

under test.

3 Use the P command to measure the RSSI

signal reading.

The DRU will prompt for the measurement to

query:

Enter R, SAT, ST, or A

4 Enter the “R” option to query the RSSI

measurement.

RSSI measurement is displayed and the

output message will show:

continuing Query..(hit return

to exit)

5 Check the RSSI measurement displayed on

the terminal screen and record it on the test

forms.

Requirement as shown in Table 11-2.

6 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

DRU receive tests 11-29

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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

Note: IFR 1600 or any equivalent communications monitor can be used.

Diversity Receive

Main

Transmit / Receive

TRU Shelf

Other TRU

Shelves

Other TRU

Shelves LNA Preselect

Filter

Receive Multicoupler

1:8 Splitters

1:8

Splitter

LNA

Duplexer

RX Bandpass

Filter

TX Bandpass

Filter

TRU 8

TRU 2

TRU 7

TRU 1

1:8

Splitter Preselect

Filter

Receive Multicoupler

Integrated

Cellular

Remote

Module

(ICRM)

Data

MTX

Voice

Alarm

Inputs Outputs

Other TRU

Shelves

Alarm

Control Unit

High Stability

MasterOscillator

Data

•••• • •

Communications Monitor (IFR 1600)

INTENSIT

POWER

DUPLEX

OUT

F1 F2 F3 F4 F6F5

MODE

ANTENNA

FM /AM 1600S

AUX

FM/AM

1600S

65W

MAX

65W

MAX

APPLIED

RCVR

DPLX

SCOPE

MTRS

AUTO

SGL

STOP

HOLD

SETUP

STORE

DEL

SHIFT

RCL

Enter

TESTCONTROL

DATAENTRY

MEMORY EDIT SQLCH VOL

FIELD SELECT

< >

MIC/ACC SINAD AUDIO DEMOD VΩCOM AMP SCOPE T/R

IN/OUT IN IN OUT OUT 1KVDC/500V

AC MAX 2 AMPS

MAX

200 VDC

MAX

200W

MAX

IN/OUT

BER

DMM

DATASCROLL

EXT MOD

STEP

SCRN

GEN

ANLZ

Sniffer

VT100

•••• • •

Combiner

MCPAs

4:1 Combiner

MCPA Shelf

11-30 DRU tests

411-2051-500 Draft 00.01 November 1999

Step Action Observation

1 Put the DRU under test out of service at the

MTX.

2 Connect a low loss RF cable from the IFR output

Duplex 65W Max jack to the RMC input port A. The RF cable loss should be known and

will be used for calculation later.

3 Connect the interface terminal to the RS-232

port on the front panel of the TRU under test.

4 Place the transceiver in Debug mode by pressing

the BREAK key.

5 On the Debug terminal type “SET FS ON” and

type press the <RETURN> key.

If the command is not issued right-a-way then the

BREAK key may have to be typed again.

6 From the terminal, select the channel assigned

to the DRU under test by using the B command.

>B <return>

Enter the channel number

>XXXX

The DRU will request a channel number

( 1…799 or 991…1023 )

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’)

7 Ensure that the DRU configurations are as listed

in Table 11-3 for the RSSI characteristics test.

8 On the communications monitor, set the receiver

RF frequency to the frequency corresponding to

that of the TRU under test.

For an IFR 1600, by selecting the

transmitter frequency, the receiver

frequency will automatically be set.

9 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.

>P <return>

The DRU will prompt for the

measurement to query:

Enter R, SAT, ST, or A

- continued -

DRU receive tests 11-31

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Step Action Observation

11 Enter the “R” option to query the RSSI

measurement.

>R <return>

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

>O <return>

>A dB1 0 0

The RSSI offset should be kept to ±5 dB to keep

RSSI values between -130 dBm and -30 dBm.

Example:

Input level: -60dBm

Measured RSSI value: -57dBm

Typical RF cable loss: 1dB

then dB1 = -60 - (-57) - 1 = - 4dB

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.

>N <return>

The DRU will request an antenna path

choice. Enter path ( A,B, or DIV ).

16 Enter the antenna path

>B <return>

Change the connection to the RMC input port B

accordingly.

Current Receiver path: B

17 Repeat step 7 to step 12 for the new antenna

path.

- continued -

11-32 DRU tests

411-2051-500 Draft 00.01 November 1999

Step Action Observation

18 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

>O <return>

>B dB4 0 0

Antenna Port 1 2 3 4 5 6

RSSI offset dB1 0 0 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.

>N <return>

The DRU will request an antenna path

choice. Enter path (A,B, or DIV).

21 Enter the antenna path.

>A <return>

Current Receiver path: A

22 Change the antenna ports to 2 and 5 with the M

command from the Debug terminal.

>M <return>

The DRU will request the port numbers.

Enter a path A port number (1|2|3) and

a path B port number (4|5|6).

23 Enter the antenna ports as two numbers

separated by a space

>2 5 <return>

24 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

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:

>A DB1 DB2 0

where DB2 = RSSI offset for port 2 and

DB1 = previous value set for port 1.

>B DB4 DB5 0

where DB5 = RSSI offset for port 5 and

DB4 = previous value set for port 4.

- continued -

DRU receive tests 11-33

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Table 11-3 shows the DRU configuration for RSSI characteristics and Table

11-4 shows the RSSI measurement characteristics.

Step Action Observation

25 Change the Antenna path with the N command

to path ‘A’ from the Debug terminal.

>N <return>

The DRU will request an antenna path

choice. Enter path ( A,B, or DIV ).

26 Enter the antenna path.

>A <return>

Current Receiver path: A

27 Change the antenna ports to 2 and 5 with the M

command from the Debug terminal.

>M <return>

The DRU will request the port numbers.

Enter a path A port number (1|2|3) and

a path B port number (4|5|6).

28 Enter the antenna ports as two numbers

separated by a space.

>3 6 <return>

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:

>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.

>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 -

11-34 DRU tests

411-2051-500 Draft 00.01 November 1999

RSSI field specification: Nominal value ±3 dB

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 G I J K L P R T

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

DRU receive tests 11-35

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

SAT detect test

This test ensures that the DRU meets the minimum requirement of detecting a

Supervisory Audio Tone signal.

Step Action Observation

1 Ensure that the DRU configurations are as

listed in Table 11-1 for the SAT detect test.

2 Use the P command to query the SAT signal.

The DRU will prompt for the signal to query:

Enter R, SAT, ST, or A

3 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)

4 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

5 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

6 Check the RF signal level on the

communications monitor. The RF signal level must be:

less than -105 dBm

7 Record the RF signal level on the test forms.

8 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

9 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 -

11-36 DRU tests

411-2051-500 Draft 00.01 November 1999

ST detect test

This test ensures that the DRU meets the minimum requirement of detecting a

Signaling Tone signal.

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 -

Step Action Observation

1 Ensure that the DRU configurations are as

listed in Table 11-1 for the ST detect test.

2 Use the P command to query the ST signal.

The DRU will prompt for the signal to query:

Enter R, SAT, ST, or A

3 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)

4 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

5 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

6 Check the RF signal level on the

communications monitor. The RF signal level must be:

less than -105 dBm

7 Record the RF signal level on the test forms.

8 Press the “Return” key from the terminal to

discontinue the measurement. The output message will show:

Query Status is OFF

Step Action Observation

DRU receive tests 11-37

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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.

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.

At the command prompt, perform a warm reset on the DRU by entering:

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.

11-38 DRU tests

411-2051-500 Draft 00.01 November 1999

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.

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.

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.

Transmit RF output power test 11-39

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Figure 11-7

Transmit RF output power test setup

Diversity Receive

Main

Transmit / Receive

TRU Shelf

Other TRU

Shelves

Other TRU

Shelves LNA Preselect

Filter

Receive Multicoupler

1:8 Splitters

1:8

Splitter

LNA

Duplexer

RX Bandpass

Filter

TX Bandpass

Filter

TRU 8

TRU 2

TRU 7

TRU 1

1:8

Splitter Preselect

Filter

Receive Multicoupler

Integrated

Cellular

Remote

Module

(ICRM)

Data

MTX

Voice

Alarm

Inputs Outputs

Other TRU

Shelves

Alarm

Control Unit

High Stability

MasterOscillator

Data

•••• • •

Communications Monitor (IFR 1600)

INTENSIT

POWER

DUPLEX

OUT

F1 F2 F3 F4 F6F5

MODE

ANTENNA

FM /AM 1600S

AUX

FM/AM

1600S

65W

MAX

65W

MAX

APPLIED

RCVR

DPLX

SCOPE

MTRS

AUTO

SGL

STOP

HOLD

SETUP

STORE

DEL

SHIFT

RCL

Enter

TESTCONTROL

DATAENTRY

MEMORY EDIT SQLCH VOL

FIELD SELECT

< >

MIC/ACC SINAD AUDIO DEMOD VΩCOM AMP SCOPE T/R

IN/OUT IN IN OUT OUT 1KVDC/500V

AC MAX 2 AMPS

MAX

200 VDC

MAX

200W

MAX

IN/OUT

BER

DMM

DATASCROLL

EXT MOD

STEP

SCRN

GEN

ANLZ

Sniffer

VT100

Combiner MCPAs

4:1 Combiner

MCPA Shelf

11-40 DRU tests

411-2051-500 Draft 00.01 November 1999

4. From the terminal, select the channel assigned to the TRU under test by

using the B command.

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

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.

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

Transmit RF output power test 11-41

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Figure 11-8

Transmit power level of a DualMode 800 Enclosure with 24-channel per cell/sector using two

MCPA modules

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

1 Ensure that the TRU configurations are as

listed in Table 11-1 for the Power Output test.

2 Turn on the TRU transmitter with the C

command

The PA status should be as follows:

PA: on

TxPwrIndex: 0

TxPwrStep: 4.00

MaxTxPwr: 15.00

3 Measure the output power of the channel on

the communications monitor. Power level should be within site

specifications (refer to Table 11-5).

4 Record the power level on the test forms.

5 Turn off the TRU transmitter with the C

command.

The PA status on the screen will show:

PA: off

+5.75 dBm

-1.34 dBm +38.3 dBm

(6.7 watts)

(Note 5)

+27 dBm

(-0.25 dB) (-0.2 dB)

(-6.25 dB) (-0.7 dB) (-0.1 dB)

(-0.4 dB)

Transmit Receive Unit

(TRU)

TX Combiner

(at the back of

TRU shelf)

Combiner

Duplexer

Antenna panel

Lightning arrestor

TX/RX

Antenna

4:1

Notes: 1.

Typical gains and losses shown — not maximum or minimum.

Per-channel TX power level shown with TRU output at +27 dBm.

MCPA gain includes the MCPA module gain and the splitter,

combiner, and cable losses within the MCPA shelf.

Additional loss due to amplitude/phase imbalance (typically 0 to

0.5 dB) not shown.

Output power at duplexer antenna port may be 0 to 0.5 dB lower

due to amplidtue/phase imbalance.

8:1

MCPA

LMR-400

+53.1 dB

(Notes 3

and 4)(-21 dB)

+39.2 dBm

(8.3 watts) +37.8 dBm

(6.0 watts)

(Note 5)

(-0.84 dB) (-0.25 dB)

11-42 DRU tests

411-2051-500 Draft 00.01 November 1999

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.

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.

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.

At the command prompt, perform a warm reset on the TRU by entering:

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.

DRU digital tests 11-43

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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-to-

far and far-to-near directions. Bi-directional transmit and receive tests are

performed; uni-directional tests are automatically performed only if the bi-

directional 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

11-44 DRU tests

411-2051-500 Draft 00.01 November 1999

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

1 Ensure that the following tables have been

datafilled.

Table CTTPARMS

Table PMLOADS

Table TERMATTR

Table CSMINV

Tuples shown are examples only. They may

look different on your screen.

Table CTTPARMS has a tuple for the cell

under test and range TESTNAME says

“MRBT”

TABLE CTTPARMS

PARMNAME TSTPARMS

---------------------------------------------

MRBT MRVT MRBT 6000000 6000 6000 NOSTOP

TABLE: PMLOADS

LOADNAME DEVICE

-----------------------------------------------

DM2_AE25 D000PMLOADS

TABLE: TERMATTR

ATTRIBUTE PEC_CODE LOAD PADPEC CSPM HWTYPE

----------------------------------------------

AE25 AX40DA DM2_AE25 NOPAD ICRM DRUM

TABLE: CSMINV

CSMKEY MIN SERNO TERMATTR CARD PORT ALARMPT

-----------------------------------------------

495 0 214 234 0095 142 571 AE25 8 15 0

2 Ensure that the DRUM is in service.

>MAPCI;MTC;MTX

>POST CELL {cell #};CTU {ctu #}

Verify that the DRUM indicates INSV.

- continued -

DRU digital tests 11-45

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

3 Enter the log reporting system and setup a

device to report MTX 230 logs.

>LOGUTIL

>ADDREP <device name> MTX 230

>STARTDEV <device name>

>QUIT

LOGUTIL

1 report added

<device name> started

4 Enter the DRU POST level:

>POST VCH ALL or POST VCH {no.}

Post position is displayed on the MAP

terminal.

5 Perform the bit error rate test on the DRU

from the MTX.

>TST MRBT MRBT 2

Test submitted, watch LOGs for results.

Note:

MRBT test on the first Voice channel

must be completed before going to the next

Voice channel.

6 Review the results on the Log device started

earlier. A sample of the log is displayed right. 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 PRTN = Z

CTTPARMS: MRBT 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.

7 Record the results on test forms.

8 Test the next DRU by typing:

>NEXT or POST VCH (no.)

The next DRU will be posted.

9 Repeat steps 5 to 7 for testing the next DRU.

10 When tests are complete, turn logs off by

entering:

>LOGUTIL

>STOPDEV <device name>

>DELREP <device name> MTX 230

>QUIT

LOGUTIL

Device Stopped

1 Report deleted

- End -

Step Action Observation

11-46 DRU tests

411-2051-500 Draft 00.01 November 1999

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.

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.

CAUTION

Service interruption

The service of the shelf housing the TRU under test will be

affected. Perform the tests during low traffic period.

WARNING

RF radiation hazard

Do NOT disconnect any RF cables when transmitters are on.

DRU digital tests 11-47

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Figure 11-10

BER test setup at the cell site

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.

Diversity Receive

Main

Transmit / Receive

TRU Shelf

Other TRU

Shelves

Other TRU

Shelves LNA Preselect

Filter

Receive Multicoupler

1:8 Splitters

1:8

Splitter

LNA

Duplexer

RX Bandpass

Filter

TX Bandpass

Filter

TRU 8

TRU 2

TRU 7

TRU 1

1:8

Splitter Preselect

Filter

Receive Multicoupler

Integrated

Cellular

Remote

Module

(ICRM)

Data

MTX

Voice

Alarm

Inputs Outputs

Other TRU

Shelves

Alarm

Control Unit

High Stability

MasterOscillator

Data

•••• • •

Communications Monitor (IFR 1900)

INTENSIT

POWER

DUPLEX

OUT

F1 F2 F3 F4 F6F5

MODE

ANTENNA

FM /AM 1600S

AUX

FM/AM

1600S

65W

MAX

65W

MAX

APPLIED

RCVR

DPLX

SCOPE

MTRS

AUTO

SGL

STOP

HOLD

SETUP

STORE

DEL

SHIFT

RCL

Enter

TESTCONTROL

DATAENTRY

MEMORY EDIT SQLCH VOL

FIELD SELECT

< >

MIC/ACC SINAD AUDIO DEMOD VΩCOM AMP SCOPE T/R

IN/OUT IN IN OUT OUT 1KVDC/500V

AC MAX 2 AMPS

MAX

200 VDC

MAX

200W

MAX

IN/OUT

BER

DMM

DATASCROLL

EXT MOD

STEP

SCRN

GEN

ANLZ

Sniffer

VT100

•••• • •

Combiner

MCPAs

4:1 Combiner

MCPA Shelf

11-48 DRU tests

411-2051-500 Draft 00.01 November 1999

Step Action Observation

1 Connect the test setup as shown in Figure

11-10.

2 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.

3 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.

4 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.

5 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.

6 Normalize the system. The A-side splitter on the TRU shelf is

connected back to the RMC output.

7 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.

8 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 -

DRU digital tests 11-49

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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

1 Connect a VT100 (or equivalent) terminal to

the RS-232 port on the front panel of the

TRU under test.

2 By pressing the “Break” key on the terminal

keyboard, you can access the command line

mode.

The terminal will display (the TRU2 display is

shown as an example):

TRU Terminal Interface

Northern Research, Inc.

3 At the prompt (>), type:

>set lt off

4 Type:

>set pa off

The TRU transmitter is turned off.

This step ensures that the TRU is not

radiating RF power when disconnecting the

RF cable.

5 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).

6 Select the Modulation Accuracy function on

the test equipment.

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.

The Modulation Accuracy display screen on

the IFR1600 shows:

MODULATION ACCURACY

CHANNEL 1

I/Q OFFSET=

FREQUENCY ERROR=

RMS PHASE ERROR=

RMS MAGNITUDE ERROR=

RMS ERROR VECTOR MAGNITUDE=

- continued -

11-50 DRU tests

411-2051-500 Draft 00.01 November 1999

7 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.

8 On the terminal, type:

>set pers ttc

Personality configuration was successful.

The personality of the TRU changes to a

TDMA Traffic Channel.

9 Type:

>set channel xxxx

“xxxx” is the channel number of the TRU

under test.

Channel change was successful.

The channel of the TRU changes to the

desired number.

10 Type:

>set txpowidx 0

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 -

Step Action Observation

DRU digital tests 11-51

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

14 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.

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%)

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.

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

This command removes the run inject

command and resets the TRU.

20 Disconnect the terminal interface from the

TRU.

- End -

Step Action Observation

11-52 DRU tests

411-2051-500 Draft 00.01 November 1999

TDMA call test

This test is used to verify the origination and termination of a digital call

through the DRU under test.

Step Action Observation

1 Originate a call with a TDMA cellular phone.

It may be necessary to make several calls

before the system selects the DRU under

test.

The LED display on the front panel of the

TRU will indicate that the DRU is selected.

2 Check that the audio quality of the call is

good.

3 Terminate the call. 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.

12-1

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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 Remark

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

12-2 Enclosure maintenance

411-2051-500 Draft 00.01 November 1999

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

4:1 Combiner assembly 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 For NT3P20XD to expand

to 16 ports

ERMC — 16 ports NT3P20XC L/L

Integrated Cellular Remote Module (ICRM)

shelf NTTG86AA L/L

Table 12-1

DualMode Urban field replaceable units (continued)

Description PEC/CPC Service Remark

Field Replaceable Unit (FRU) 12-3

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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

Solar Shield Kit NTTF12AB L/L

Table 12-1

DualMode Urban field replaceable units (continued)

Description PEC/CPC Service Remark

12-4 Enclosure maintenance

411-2051-500 Draft 00.01 November 1999

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.

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.

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.

CAUTION

Do NOT disconnect any RF cables when transmitters are on.

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.

Replacing faulty common equipment (CE) units 12-5

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Replacing faulty common equipment (CE) units

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.

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.

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.

CAUTION

Hot insertion replacement may cause damage to the

components and a possible service interruption.

12-6 Enclosure maintenance

411-2051-500 Draft 00.01 November 1999

Replacing faulty radio frequency (RF) units

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.

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.

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.

CAUTION

Hot insertion replacement may cause damage to the

components and a possible service interruption.

Replacing faulty radio frequency (RF) units 12-7

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Replacing the TRU or MCPA shelf

The channels associated with the TRU or MCPA shelf 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 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 off-

line 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.

12-8 Enclosure maintenance

411-2051-500 Draft 00.01 November 1999

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.

Returning a faulty unit to your Nortel Networks CSO office 12-9

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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

12-10 Enclosure maintenance

411-2051-500 Draft 00.01 November 1999

A-1

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Appendix A: Frequency table A

System's channel and frequency

Channel frequency calculation (in the following, N = channel number)

AMPS frequency allocation

System Channel Receive frequency Transmit frequency

Not Used 990 824.010 MHz 869.010 MHz

A” 991 to 1023 824.040 to 825.000 MHz 869.040 to 870.000 MHz

A 1 to 333 825.030 to 834.990 MHz 870.030 to 879.990 MHz

B 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

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

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

A-2 Appendix A: Frequency table

411-2051-500 Draft 00.01 November 1999

Chan RX TX Chan RX TX Chan RX TX Chan RX TX

1825.03 870.03 51 826.53 871.53 101 828.03 873.03 151 829.53 874.53

2825.06 870.06 52 826.56 871.56 102 828.06 873.06 152 829.56 874.56

3825.09 870.09 53 826.59 871.59 103 828.09 873.09 153 829.59 874.59

4825.12 870.12 54 826.62 871.62 104 828.12 873.12 154 829.62 874.62

5825.15 870.15 55 826.65 871.65 105 828.15 873.15 155 829.65 874.65

6825.18 870.18 56 826.68 871.68 106 828.18 873.18 156 829.68 874.68

7825.21 870.21 57 826.71 871.71 107 828.21 873.21 157 829.71 874.71

8825.24 870.24 58 826.74 871.74 108 828.24 873.24 158 829.74 874.74

9825.27 870.27 59 826.77 871.77 109 828.27 873.27 159 829.77 874.77

10 825.30 870.30 60 826.80 871.80 110 828.30 873.30 160 829.80 874.80

11 825.33 870.33 61 826.83 871.83 111 828.33 873.33 161 829.83 874.83

12 825.36 870.36 62 826.86 871.86 112 828.36 873.36 162 829.86 874.86

13 825.39 870.39 63 826.89 871.89 113 828.39 873.39 163 829.89 874.89

14 825.42 870.42 64 826.92 871.92 114 828.42 873.42 164 829.92 874.92

15 825.45 870.45 65 826.95 871.95 115 828.45 873.45 165 829.95 874.95

16 825.48 870.48 66 826.98 871.98 116 828.48 873.48 166 829.98 874.98

17 825.51 870.51 67 827.01 872.01 117 828.51 873.51 167 830.01 875.01

18 825.54 870.54 68 827.04 872.04 118 828.54 873.54 168 830.04 875.04

19 825.57 870.57 69 827.07 872.07 119 828.57 873.57 169 830.07 875.07

20 825.60 870.60 70 827.10 872.10 120 828.60 873.60 170 830.10 875.10

21 825.63 870.63 71 827.13 872.13 121 828.63 873.63 171 830.13 875.13

22 825.66 870.66 72 827.16 872.16 122 828.66 873.66 172 830.16 875.16

23 825.69 870.69 73 827.19 872.19 123 828.69 873.69 173 830.19 875.19

24 825.72 870.72 74 827.22 872.22 124 828.72 873.72 174 830.22 875.22

25 825.75 870.75 75 827.25 872.25 125 828.75 873.75 175 830.25 875.25

26 825.78 870.78 76 827.28 872.28 126 828.78 873.78 176 830.28 875.28

27 825.81 870.81 77 827.31 872.31 127 828.81 873.81 177 830.31 875.31

28 825.84 870.84 78 827.34 872.34 128 828.84 873.84 178 830.34 875.34

29 825.87 870.87 79 827.37 872.37 129 828.87 873.87 179 830.37 875.37

30 825.90 870.90 80 827.40 872.40 130 828.90 873.90 180 830.40 875.40

31 825.93 870.93 81 827.43 872.43 131 828.93 873.93 181 830.43 875.43

32 825.96 870.96 82 827.46 872.46 132 828.96 873.96 182 830.46 875.46

33 825.99 870.99 83 827.49 872.49 133 828.99 873.99 183 830.49 875.49

34 826.02 871.02 84 827.52 872.52 134 829.02 874.02 184 830.52 875.52

35 826.05 871.05 85 827.55 872.55 135 829.05 874.05 185 830.55 875.55

36 826.08 871.08 86 827.58 872.58 136 829.08 874.08 186 830.58 875.58

37 826.11 871.11 87 827.61 872.61 137 829.11 874.11 187 830.61 875.61

38 826.14 871.14 88 827.64 872.64 138 829.14 874.14 188 830.64 875.64

39 826.17 871.17 89 827.67 872.67 139 829.17 874.17 189 830.67 875.67

40 826.20 871.20 90 827.70 872.70 140 829.20 874.20 190 830.70 875.70

41 826.23 871.23 91 827.73 872.73 141 829.23 874.23 191 830.73 875.73

42 826.26 871.26 92 827.76 872.76 142 829.26 874.26 192 830.76 875.76

43 826.29 871.29 93 827.79 872.79 143 829.29 874.29 193 830.79 875.79

44 826.32 871.32 94 827.82 872.82 144 829.32 874.32 194 830.82 875.82

45 826.35 871.35 95 827.85 872.85 145 829.35 874.35 195 830.85 875.85

46 826.38 871.38 96 827.88 872.88 146 829.38 874.38 196 830.88 875.88

47 826.41 871.41 97 827.91 872.91 147 829.41 874.41 197 830.91 875.91

48 826.44 871.44 98 827.94 872.94 148 829.44 874.44 198 830.94 875.94

49 826.47 871.47 99 827.97 872.97 149 829.47 874.47 199 830.97 875.97

50 826.50 871.50 100 828.00 873.00 150 829.50 874.50 200 831.00 876.00

Appendix A: Frequency table A-3

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Chan RX TX Chan RX TX Chan RX TX Chan RX TX

201 831.03 876.03 251 832.53 877.53 301 834.03 879.03 351 835.53 880.53

202 831.06 876.06 252 832.56 877.56 302 834.06 879.06 352 835.56 880.56

203 831.09 876.09 253 832.59 877.59 303 834.09 879.09 353 835.59 880.59

204 831.12 876.12 254 832.62 877.62 304 834.12 879.12 354 835.62 880.62

205 831.15 876.15 255 832.65 877.65 305 834.15 879.15 355 835.65 880.65

206 831.18 876.18 256 832.68 877.68 306 834.18 879.18 356 835.68 880.68

207 831.21 876.21 257 832.71 877.71 307 834.21 879.21 357 835.71 880.71

208 831.24 876.24 258 832.74 877.74 308 834.24 879.24 358 835.74 880.74

209 831.27 876.27 259 832.77 877.77 309 834.27 879.27 359 835.77 880.77

210 831.30 876.30 260 832.80 877.80 310 834.30 879.30 360 835.80 880.80

211 831.33 876.33 261 832.83 877.83 311 834.33 879.33 361 835.83 880.83

212 831.36 876.36 262 832.86 877.86 312 834.36 879.36 362 835.86 880.86

213 831.39 876.39 263 832.89 877.89 313 834.39 879.39 363 835.89 880.89

214 831.42 876.42 264 832.92 877.92 314 834.42 879.42 364 835.92 880.92

215 831.45 876.45 265 832.95 877.95 315 834.45 879.45 365 835.95 880.95

216 831.48 876.48 266 832.98 877.98 316 834.48 879.48 366 835.98 880.98

217 831.51 876.51 267 833.01 878.01 317 834.51 879.51 367 836.01 881.01

218 831.54 876.54 268 833.04 878.04 318 834.54 879.54 368 836.04 881.04

219 831.57 876.57 269 833.07 878.07 319 834.57 879.57 369 836.07 881.07

220 831.60 876.60 270 833.10 878.10 320 834.60 879.60 370 836.10 881.10

221 831.63 876.63 271 833.13 878.13 321 834.63 879.63 371 836.13 881.13

222 831.66 876.66 272 833.16 878.16 322 834.66 879.66 372 836.16 881.16

223 831.69 876.69 273 833.19 878.19 323 834.69 879.69 373 836.19 881.19

224 831.72 876.72 274 833.22 878.22 324 834.72 879.72 374 836.22 881.22

225 831.75 876.75 275 833.25 878.25 325 834.75 879.75 375 836.25 881.25

226 831.78 876.78 276 833.28 878.28 326 834.78 879.78 376 836.28 881.28

227 831.81 876.81 277 833.31 878.31 327 834.81 879.81 377 836.31 881.31

228 831.84 876.84 278 833.34 878.34 328 834.84 879.84 378 836.34 881.34

229 831.87 876.87 279 833.37 878.37 329 834.87 879.87 379 836.37 881.37

230 831.90 876.90 280 833.40 878.40 330 834.90 879.90 380 836.40 881.40

231 831.93 876.93 281 833.43 878.43 331 834.93 879.93 381 836.43 881.43

232 831.96 876.96 282 833.46 878.46 332 834.96 879.96 382 836.46 881.46

233 831.99 876.99 283 833.49 878.49 333 834.99 879.99 383 836.49 881.49

234 832.02 877.02 284 833.52 878.52 334 835.02 880.02 384 836.52 881.52

235 832.05 877.05 285 833.55 878.55 335 835.05 880.05 385 836.55 881.55

236 832.08 877.08 286 833.58 878.58 336 835.08 880.08 386 836.58 881.58

237 832.11 877.11 287 833.61 878.61 337 835.11 880.11 387 836.61 881.61

238 832.14 877.14 288 833.64 878.64 338 835.14 880.14 388 836.64 881.64

239 832.17 877.17 289 833.67 878.67 339 835.17 880.17 389 836.67 881.67

240 832.20 877.20 290 833.70 878.70 340 835.20 880.20 390 836.70 881.70

241 832.23 877.23 291 833.73 878.73 341 835.23 880.23 391 836.73 881.73

242 832.26 877.26 292 833.76 878.76 342 835.26 880.26 392 836.76 881.76

243 832.29 877.29 293 833.79 878.79 343 835.29 880.29 393 836.79 881.79

244 832.32 877.32 294 833.82 878.82 344 835.32 880.32 394 836.82 881.82

245 832.35 877.35 295 833.85 878.85 345 835.35 880.35 395 836.85 881.85

346 832.38 877.38 296 833.88 878.88 346 835.38 880.38 396 836.88 881.88

247 832.41 877.41 297 833.91 878.91 347 835.41 880.41 397 836.91 881.91

248 832.44 877.44 298 833.94 878.94 348 835.44 880.44 398 836.94 881.94

249 832.47 877.47 299 833.97 878.97 349 835.47 880.47 399 836.97 881.97

250 832.50 877.50 300 834.00 879.00 350 835.50 880.50 400 837.00 882.00

A-4 Appendix A: Frequency table

411-2051-500 Draft 00.01 November 1999

Chan RX TX Chan RX TX Chan RX TX Chan RX TX

401 837.03 882.03 451 838.53 883.53 501 840.03 885.03 551 841.53 886.53

402 837.06 882.06 452 838.56 883.56 502 840.06 885.06 552 841.56 886.56

403 837.09 882.09 453 838.59 883.59 503 840.09 885.09 553 841.59 886.59

404 837.12 882.12 454 838.62 883.62 504 840.12 885.12 554 841.62 886.62

405 837.15 882.15 455 838.65 883.65 505 840.15 885.15 555 841.65 886.65

406 837.18 882.18 456 838.68 883.68 506 840.18 885.18 556 841.68 886.68

407 837.21 882.21 457 838.71 883.71 507 840.21 885.21 557 841.71 886.71

408 837.24 882.24 458 838.74 883.74 508 840.24 885.24 558 841.74 886.74

409 837.27 882.27 459 838.77 883.77 509 840.27 885.27 559 841.77 886.77

410 837.30 882.30 460 838.80 883.80 510 840.30 885.30 560 841.80 886.80

411 837.33 882.33 461 838.83 883.83 511 840.33 885.33 561 841.83 886.83

412 837.36 882.36 462 838.86 883.86 512 840.36 885.36 562 841.86 886.86

413 837.39 882.39 463 838.89 883.89 513 840.39 885.39 563 841.89 886.89

414 837.42 882.42 464 838.92 883.92 514 840.42 885.42 564 841.92 886.92

415 837.45 882.45 465 838.95 883.95 515 840.45 885.45 565 841.95 886.95

416 837.48 882.48 466 838.98 883.98 516 840.48 885.48 566 841.98 886.98

417 837.51 882.51 467 839.01 884.01 517 840.51 885.51 567 842.01 887.01

418 837.54 882.54 468 839.04 884.04 518 840.54 885.54 568 842.04 887.04

419 837.57 882.57 469 839.07 884.07 519 840.57 885.57 569 842.07 887.07

420 837.60 882.60 470 839.10 884.10 520 840.60 885.60 570 842.10 887.10

421 837.63 882.63 471 839.13 884.13 521 840.63 885.63 571 842.13 887.13

422 837.66 882.66 472 839.16 884.16 522 840.66 885.66 572 842.16 887.16

423 837.69 882.69 473 839.19 884.19 523 840.69 885.69 573 842.19 887.19

424 837.72 882.72 474 839.22 884.22 524 840.72 885.72 574 842.22 887.22

425 837.75 882.75 475 839.25 884.25 525 840.75 885.75 575 842.25 887.25

426 837.78 882.78 476 839.28 884.28 526 840.78 885.78 576 842.28 887.28

427 837.81 882.81 477 839.31 884.31 527 840.81 885.81 577 842.31 887.31

428 837.84 882.84 478 839.34 884.34 528 840.84 885.84 578 842.34 887.34

429 837.87 882.87 479 839.37 884.37 529 840.87 885.87 579 842.37 887.37

430 837.90 882.90 480 839.40 884.40 530 840.90 885.90 580 842.40 887.40

431 837.93 882.93 481 839.43 884.43 531 840.93 885.93 581 842.43 887.43

432 837.96 882.96 482 839.46 884.46 532 840.96 885.96 582 842.46 887.46

433 837.99 882.99 483 839.49 884.49 533 840.99 885.99 583 842.49 887.49

434 838.02 883.02 484 839.52 884.52 534 841.02 886.02 584 842.52 887.52

435 838.05 883.05 485 839.55 884.55 535 841.05 886.05 585 842.55 887.55

436 838.08 883.08 486 839.58 884.58 536 841.08 886.08 586 842.58 887.58

437 838.11 883.11 487 839.61 884.61 537 841.11 886.11 587 842.61 887.61

438 838.14 883.14 488 839.64 884.64 538 841.14 886.14 588 842.64 887.64

439 838.17 883.17 489 839.67 884.67 539 841.17 886.17 589 842.67 887.67

440 838.20 883.20 490 839.70 884.70 540 841.20 886.20 590 842.70 887.70

441 838.23 883.23 491 839.73 884.73 541 841.23 886.23 591 842.73 887.73

442 838.26 883.26 492 839.76 884.76 542 841.26 886.26 592 842.76 887.76

443 838.29 883.29 493 839.79 884.79 543 841.29 886.29 593 842.79 887.79

444 838.32 883.32 494 839.82 884.82 544 841.32 886.32 594 842.82 887.82

445 838.35 883.35 495 839.85 884.85 545 841.35 886.35 595 842.85 887.85

446 838.38 883.38 496 839.88 884.88 546 841.38 886.38 596 842.88 887.88

447 838.41 883.41 497 839.91 884.91 547 841.41 886.41 597 842.91 887.91

448 838.44 883.44 498 839.94 884.94 548 841.44 886.44 598 842.94 887.94

449 838.47 883.47 499 839.97 884.97 549 841.47 886.47 599 842.97 887.97

450 838.50 883.50 500 840.00 885.00 550 841.50 886.50 600 843.00 888.00

Appendix A: Frequency table A-5

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Chan RX TX Chan RX TX Chan RX TX Chan RX TX

601 843.03 888.03 651 844.53 889.53 701 846.03 891.03 751 847.53 892.53

602 843.06 888.06 652 844.56 889.56 702 846.06 891.06 752 847.56 892.56

603 843.09 888.09 653 844.59 889.59 703 846.09 891.09 753 847.59 892.59

604 843.12 888.12 654 844.62 889.62 704 846.12 891.12 754 847.62 892.62

605 843.15 888.15 655 844.65 889.65 705 846.15 891.15 755 847.65 892.65

606 843.18 888.18 656 844.68 889.68 706 846.18 891.18 756 847.68 892.68

607 843.21 888.21 657 844.71 889.71 707 846.21 891.21 757 847.71 892.71

608 843.24 888.24 658 844.74 889.74 708 846.24 891.24 758 847.74 892.74

609 843.27 888.27 659 844.77 889.77 709 846.27 891.27 759 847.77 892.77

610 843.30 888.30 660 844.80 889.80 710 846.30 891.30 760 847.80 892.80

611 843.33 888.33 661 844.83 889.83 711 846.33 891.33 761 847.83 892.83

612 843.36 888.36 662 844.86 889.86 712 846.36 891.36 762 847.86 892.86

613 843.39 888.39 663 844.89 889.89 713 846.39 891.39 763 847.89 892.89

614 843.42 888.42 664 844.92 889.92 714 846.42 891.42 764 847.92 892.92

615 843.45 888.45 665 844.95 889.95 715 846.45 891.45 765 847.95 892.95

616 843.48 888.48 666 844.98 889.98 716 846.48 891.48 766 847.98 892.98

617 843.51 888.51 667 845.01 890.01 717 846.51 891.51 767 848.01 893.01

618 843.54 888.54 668 845.04 890.04 718 846.54 891.54 768 848.04 893.04

619 843.57 888.57 669 845.07 890.07 719 846.57 891.57 769 848.07 893.07

620 843.60 888.60 670 845.10 890.10 720 846.60 891.60 770 848.10 893.10

621 843.63 888.63 671 845.13 890.13 721 846.63 891.63 771 848.13 893.13

622 843.66 888.66 672 845.16 890.16 722 846.66 891.66 772 848.16 893.16

623 843.69 888.69 673 845.19 890.19 723 846.69 891.69 773 848.19 893.19

624 843.72 888.72 674 845.22 890.22 724 846.72 891.72 774 848.22 893.22

625 843.75 888.75 675 845.25 890.25 725 846.75 891.75 775 848.25 893.25

626 843.78 888.78 676 845.28 890.28 726 846.78 891.78 776 848.28 893.28

627 843.81 888.81 677 845.31 890.31 727 846.81 891.81 777 848.31 893.31

628 843.84 888.84 678 845.34 890.34 728 846.84 891.84 778 848.34 893.34

629 843.87 888.87 679 845.37 890.37 729 846.87 891.87 779 848.37 893.37

630 843.90 888.90 680 845.40 890.40 730 846.90 891.90 780 848.40 893.40

631 843.93 888.93 681 845.43 890.43 731 846.93 891.93 781 848.43 893.43

632 843.96 888.96 682 845.46 890.46 732 846.96 891.96 782 848.46 893.46

633 843.99 888.99 683 845.49 890.49 733 846.99 891.99 783 848.49 893.49

634 844.02 889.02 684 845.52 890.52 734 847.02 892.02 784 848.52 893.52

635 844.05 889.05 685 845.55 890.55 735 847.05 892.05 785 848.55 893.55

636 844.08 889.08 686 845.58 890.58 736 847.08 892.08 786 848.58 893.58

637 844.11 889.11 687 845.61 890.61 737 847.11 892.11 787 848.61 893.61

638 844.14 889.14 688 845.64 890.64 738 847.14 892.14 788 848.64 893.64

639 844.17 889.17 689 845.67 890.67 739 847.17 892.17 789 848.67 893.67

640 844.20 889.20 690 845.70 890.70 740 847.20 892.20 790 848.70 893.70

641 844.23 889.23 691 845.73 890.73 741 847.23 892.23 791 848.73 893.73

642 844.26 889.26 692 845.76 890.76 742 847.26 892.26 792 848.76 893.76

643 844.29 889.29 693 845.79 890.79 743 847.29 892.29 793 848.79 893.79

644 844.32 889.32 694 845.82 890.82 744 847.32 892.32 794 848.82 893.82

645 844.35 889.35 695 845.85 890.85 745 847.35 892.35 795 848.85 893.85

646 844.38 889.38 696 845.88 890.88 746 847.38 892.38 796 848.88 893.88

647 844.41 889.41 697 845.91 890.91 747 847.41 892.41 797 848.91 893.91

648 844.44 889.44 698 845.94 890.94 748 847.44 892.44 798 848.94 893.94

649 844.47 889.47 699 845.97 890.97 749 847.47 892.47 799 848.97 893.97

650 844.50 889.50 700 846.00 891.00 750 847.50 892.50 800 Resrvd Resrvd

A-6 Appendix A: Frequency table

411-2051-500 Draft 00.01 November 1999

Chan RX TX Chan RX TX Chan RX TX Chan RX TX

801 Resrvd Resrvd 851 Resrvd Resrvd 901 Resrvd Resrvd 951 Resrvd Resrvd

802 Resrvd Resrvd 852 Resrvd Resrvd 902 Resrvd Resrvd 952 Resrvd Resrvd

803 Resrvd Resrvd 853 Resrvd Resrvd 903 Resrvd Resrvd 953 Resrvd Resrvd

804 Resrvd Resrvd 854 Resrvd Resrvd 904 Resrvd Resrvd 954 Resrvd Resrvd

805 Resrvd Resrvd 855 Resrvd Resrvd 905 Resrvd Resrvd 955 Resrvd Resrvd

806 Resrvd Resrvd 856 Resrvd Resrvd 906 Resrvd Resrvd 956 Resrvd Resrvd

807 Resrvd Resrvd 857 Resrvd Resrvd 907 Resrvd Resrvd 957 Resrvd Resrvd

808 Resrvd Resrvd 858 Resrvd Resrvd 908 Resrvd Resrvd 958 Resrvd Resrvd

809 Resrvd Resrvd 859 Resrvd Resrvd 909 Resrvd Resrvd 959 Resrvd Resrvd

810 Resrvd Resrvd 860 Resrvd Resrvd 910 Resrvd Resrvd 960 Resrvd Resrvd

811 Resrvd Resrvd 861 Resrvd Resrvd 911 Resrvd Resrvd 961 Resrvd Resrvd

812 Resrvd Resrvd 862 Resrvd Resrvd 912 Resrvd Resrvd 962 Resrvd Resrvd

813 Resrvd Resrvd 863 Resrvd Resrvd 913 Resrvd Resrvd 963 Resrvd Resrvd

814 Resrvd Resrvd 864 Resrvd Resrvd 914 Resrvd Resrvd 964 Resrvd Resrvd

815 Resrvd Resrvd 865 Resrvd Resrvd 915 Resrvd Resrvd 965 Resrvd Resrvd

816 Resrvd Resrvd 866 Resrvd Resrvd 916 Resrvd Resrvd 966 Resrvd Resrvd

817 Resrvd Resrvd 867 Resrvd Resrvd 917 Resrvd Resrvd 967 Resrvd Resrvd

818 Resrvd Resrvd 868 Resrvd Resrvd 918 Resrvd Resrvd 968 Resrvd Resrvd

819 Resrvd Resrvd 869 Resrvd Resrvd 919 Resrvd Resrvd 969 Resrvd Resrvd

820 Resrvd Resrvd 870 Resrvd Resrvd 920 Resrvd Resrvd 970 Resrvd Resrvd

821 Resrvd Resrvd 871 Resrvd Resrvd 921 Resrvd Resrvd 971 Resrvd Resrvd

822 Resrvd Resrvd 872 Resrvd Resrvd 922 Resrvd Resrvd 972 Resrvd Resrvd

823 Resrvd Resrvd 873 Resrvd Resrvd 923 Resrvd Resrvd 973 Resrvd Resrvd

824 Resrvd Resrvd 874 Resrvd Resrvd 924 Resrvd Resrvd 974 Resrvd Resrvd

825 Resrvd Resrvd 875 Resrvd Resrvd 925 Resrvd Resrvd 975 Resrvd Resrvd

826 Resrvd Resrvd 876 Resrvd Resrvd 926 Resrvd Resrvd 976 Resrvd Resrvd

827 Resrvd Resrvd 877 Resrvd Resrvd 927 Resrvd Resrvd 977 Resrvd Resrvd

828 Resrvd Resrvd 878 Resrvd Resrvd 928 Resrvd Resrvd 978 Resrvd Resrvd

829 Resrvd Resrvd 879 Resrvd Resrvd 929 Resrvd Resrvd 979 Resrvd Resrvd

830 Resrvd Resrvd 880 Resrvd Resrvd 930 Resrvd Resrvd 980 Resrvd Resrvd

831 Resrvd Resrvd 881 Resrvd Resrvd 931 Resrvd Resrvd 981 Resrvd Resrvd

832 Resrvd Resrvd 882 Resrvd Resrvd 932 Resrvd Resrvd 982 Resrvd Resrvd

833 Resrvd Resrvd 883 Resrvd Resrvd 933 Resrvd Resrvd 983 Resrvd Resrvd

834 Resrvd Resrvd 884 Resrvd Resrvd 934 Resrvd Resrvd 984 Resrvd Resrvd

835 Resrvd Resrvd 885 Resrvd Resrvd 935 Resrvd Resrvd 985 Resrvd Resrvd

836 Resrvd Resrvd 886 Resrvd Resrvd 936 Resrvd Resrvd 986 Resrvd Resrvd

837 Resrvd Resrvd 887 Resrvd Resrvd 937 Resrvd Resrvd 987 Resrvd Resrvd

838 Resrvd Resrvd 888 Resrvd Resrvd 938 Resrvd Resrvd 988 Resrvd Resrvd

839 Resrvd Resrvd 889 Resrvd Resrvd 939 Resrvd Resrvd 989 Resrvd Resrvd

840 Resrvd Resrvd 890 Resrvd Resrvd 940 Resrvd Resrvd 990 Resrvd Resrvd

841 Resrvd Resrvd 891 Resrvd Resrvd 941 Resrvd Resrvd 991 824.04 869.04

842 Resrvd Resrvd 892 Resrvd Resrvd 942 Resrvd Resrvd 992 824.07 869.07

843 Resrvd Resrvd 893 Resrvd Resrvd 943 Resrvd Resrvd 993 824.10 869.10

844 Resrvd Resrvd 894 Resrvd Resrvd 944 Resrvd Resrvd 994 824.13 869.13

845 Resrvd Resrvd 895 Resrvd Resrvd 945 Resrvd Resrvd 995 824.16 869.16

846 Resrvd Resrvd 896 Resrvd Resrvd 946 Resrvd Resrvd 996 824.19 869.19

847 Resrvd Resrvd 897 Resrvd Resrvd 947 Resrvd Resrvd 997 824.22 869.22

848 Resrvd Resrvd 898 Resrvd Resrvd 948 Resrvd Resrvd 998 824.25 869.25

849 Resrvd Resrvd 899 Resrvd Resrvd 949 Resrvd Resrvd 999 824.28 869.28

850 Resrvd Resrvd 900 Resrvd Resrvd 950 Resrvd Resrvd 1000 824.31 869.31

Appendix A: Frequency table A-7

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Note: RX = Mobile Transmit frequency

TX = Base Station Transmit frequency

Chan RX TX Chan RX TX Chan RX TX Chan RX TX

1001 824.34 869.34 1007 824.52 869.52 1013 824.70 869.70 1019 824.88 869.88

1002 824.37 869.37 1008 824.55 869.55 1014 824.73 869.73 1020 824.91 869.91

1003 824.40 869.40 1009 824.58 869.58 1015 824.76 869.76 1021 824.94 869.94

1004 824.43 869.43 1010 824.61 869.61 1016 824.79 869.79 1022 824.97 869.97

1005 824.46 869.46 1011 824.64 869.64 1017 824.82 869.82 1023 825.00 870.00

1006 824.49 869.49 1012 824.67 869.67 1018 824.85 869.85

A-8 Appendix A: Frequency table

411-2051-500 Draft 00.01 November 1999

B-1

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

Appendix B: Test forms B

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

B-2 Appendix B: Test forms

411-2051-500 Draft 00.01 November 1999

Power and grounding checks (Chapter 4)

Cell: Date: Performed by:

Frame voltage and polarity test 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

A Power:

+27 ±0.5 Vdc

B Power:

+27 ±0.5 Vdc

Resistance to

ground: <0.5 Ω

Bay 2 voltage

check TRU

Shelf 4 TRU

Shelf 5 TRU

Shelf 6 MCPA

Shelf 2 LVD 2 TCU 2 LVD 3

(Bay 3) TCU 3

(Bay 3)

A Power:

+27 ±0.5 Vdc

B Power:

+27 ±0.5 Vdc

Resistance to

ground: <0.5 Ω

Bay 3 voltage

check 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

Appendix B: Test forms B-3

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

HSMO checks (Chapter 5)

Antenna checks (Chapter 6)

Cell: Date: Performed by:

HSMO power level and frequency checks

HSMO output Position

1Position

2Position

3Position

4Position

5Position

6Position

7Position

Power level:

-1 dBm ±3 dB

Frequency:

4.8 MHz ±1.2 Hz

HSMO output Position

9Position

10 Position

11 Position

12 Position

13 Position

14 Position

15 Position

Power level:

-1 dBm ±3 dB

Frequency:

4.8 MHz ±1.2 Hz

Cell: Date: Performed by:

Antenna 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

loss: >14.5 dB +

2 TX line loss

824 - 849 MHz

869 - 894 MHz

Antenna return loss (Thruline

wattmeter): Reflected power <4% of

forward power

B-4 Appendix B: Test forms

411-2051-500 Draft 00.01 November 1999

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 TRU 5 TRU 6 TRU 7 TRU 8

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

Appendix B: Test forms B-5

Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08

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) RSSI (dBm)

-60 -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

B-6 Appendix B: Test forms

411-2051-500 Draft 00.01 November 1999

DRU checks — Digital tests (Chapter 11)

Cell: Date: Performed by:

RF Frame: TRU Shelf:

TRU digital tests TRU 1 TRU 2 TRU 3 TRU 4 TRU 5 TRU 6 TRU 7 TRU 8

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)

Wireless Solutions

DualMode 800 Enclosure

Maintenance Manual

To order Wireless Solutions documentation, call

1-800-NTI-CARE (1-800-684-2273)

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

http://www1.nortelnetworks.com/wireless/DocuTrain/

Reserved

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.

Document number: 411-2051-500

Product release: MTX08

Document version: Draft 00.01

Date: November 1999

Printed in Canada

Family Product Manual Contacts Copyright Conf identiality Legal

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

Avaya Canada Corporation TDMA - Dual Mode 800 MHz Enclosure 000 Frtmatt

Contents

User Manual

Navigation menu

Namespaces

Views

Navigation