ADC Telecommunications CVMDBS User Manual 8

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Document Title	8

FCC ID‘ NFRCVMDBS
CVMDBS
Compact Voice & Mobile Data
Base Station
User’s
Guide
July 29, 1998
ADC Wireless System
9645 Scnnlon Rand, Sm Diego, Culifomia 92121-1761
Tel: (519) 642-7481 Fax: (619) 535-8206
Part Number 299-215-22 Rev 03
Copyright 01998 ADC Wireless Symm. All rights reserved. Printed in U.S.Ar
FCC ID: NFRCVMDBS
FCC Rules Part 15, Subpart B Notification
This equipment is designed to comply with the limits for a Class A
digital device, pursuant to part 15 of the FCC rules. These limits are
designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and,
if not installed and used in accordance with the instruction manual,
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 his own expense.
Proprietary Notice
The information and design disclosed herein was originated by and is
the property of ADC Wireless Systems. ADC reserves all patent,
proprietary design, manufacturing, reproduction, use and sales rights
thereto, and to any article disclosed herein, except to the extent rights
are expressly granted to others. The foregoing does not apply to vendor
proprietary parts. This document may not be re-printed, in whole or in
part, without the express permission of ADC.
Trademarks
Trademarks and registered trademarks used within this manual are
the property of their respective owners.
Service Information
Obtain a Return Material Authorization (RMA) before returning a unit
for repair or replacement. Before calling. note the serial number of the
equipment, module or assembly, symptom, and soflware version. For
service information and RMA, call between 6:00 am. and 6:00 pm.
Pacific Time:
ADC Technical Support
1- 800—654—1954
INTERNET: mdhs.tao@wireless.adc.com
RYou Have Cements about this Manual
While we have taken care to ensure that information contained in this
document is both comprehensive and accurate, no warranty of accuracy
is expressed or implied. Should you have any problems or questions
about the material in this manual, please contact:
ADC Wireless Systems, Mobile Systems Division
Attention: Technical Publications
9645 Scranton Road, San Diego, CA 92121-1761
TEL: 619/642-7481 FAX: 619/535—8206
Table Of Contents FCC ID: NFRCVMDBS
LIST OF FIGURES ............. . ........................................... .... .................. .... ..... .Vii
LIST OF TABLES.. ...................... .. .............................................. VIII
PREFACE ..
ABOUT THIS MANUAL ............ .. .. Ix
APPLICABLE DocuMENTs ............................. .. ........ .................................. Ix
REVISION HISTORY .......................................... . ........ ................................ Ix
CHAPTER 1. OVERVIEW
1.1 NETWORK ARCHITECTURE.... .. ERRORI BOOKMARK NOT DEFINED.
1.2 CVMDBS GENERAL DESCRIPTION...
1.2.1 CONTROL COMPUTER (CC) MODULE ..
1.2.2 MODEM/TRANSCEIVER (MX) MODULE ........................................... 1-7
1.2.3 POWER CONVERTER/ RECEIVE SITE INTERFACE MODULE ........... 1-10
1.2.4 THANSMIT SITE INTERFACE MODULE ................. ..1-12
1.2.5 CVMDBS CHASSIS ASSEMBLY ......................... ..1-12
CHAPTER 2. INPUT! OUTPUT
2.1 CONNECTOR IDENTIFICATION
2.1.1 UTILITY PORT ...............
2.1.2 AUXILIARY PORT ........................................................................... 2-5
2.1.3 NETWORK PORT (NET_P) ............................................................ 2-5
CHAPTER 3. OPERATOR COMMAND TOOLS
3.1 CVMDBS UTILITY PROGRAM TOOLS ........... ... ....... ...... ......................... 3-1
3.1.1 CVMDBS UTILITY PROGRAM TOOLS CAPABILITIES 3-1
MDBSZ5 User’s Guide (299-210-21 Revision A) v
Table of Contents FCC ID: NFRCVMDBS
CHAPTER 4. CVMDBS POWER-UP, PROGRAM LOAD, AND
CONFIGURATION
4.1 OVERVIEW .................................................. . ...................... . .................. 4-1
4.2 CVMDBS POWER-ON ................................................................... ........4-1
4.2.1 INITIALIZATION FAILURE AFTER A POWER-ON ................................. 4-2
4.2.2 CVMDBS RESEr PROCEDURE ..................................................... 42
4.3 CVMDBS PROGRAM CODE DOWNLOAD ....... ................. .. ...... .. ...... 4-3
4.3.1 DOWNLOADING PROGRAM CODE AT THE CELL SITE ....................... 4-3
4.3.2 FACTS TO KNOW BEFORE DOWNLOADING CVMDBS PROGRAM CODE4-3
4.3.3 SOFTWARE DOWNLOAD PROCEDURE ............................................ 4-3
4.4 CVMDBS PROGRAM CODE ON DISK...... ............. ........ ................. .........4-5
4.4.1 PREPARING THE HARD DISK TO AUTOMATICALLY LOAD PROGRAM
CODE ............................................................... 4-6
4.4.2 CVMDBS AUTOMATIC PROGRAM CODE LOAD PROCESS ............... 4-7
.4-10
4.5 CVMDBS CONFIGURATION FILE ON DISK OPTION...
4.5.1 ENABLING AND DISABLING THE CONFIGURATION FILE ON DISK
FEATURE ..................................................................................
4.5.2 PREPARING THE HARD DISK TO AUTOMATICALLY CONFIGURE THE
CVMDBS ............................................................................................ 4-11
4.5.3 CVMDBS AUTO-CONFIGURATION PROCESS ............................... 4-12
4.5.4 CONFIGURATION FILE ON HARD DISK COMPLETION ..................... 4-15
CHAPTER 5. OPERATION NOTES
5.1 CHAssIs GROUNDING .............................................................. .. ........... 5-1
5.2 POWER CIRCUIT BREAKER...
5.3 THERMAL CUTOFF SWITCH ..
5.4 CLOCK REFERENCE ................
5.4.1 OCXO WARM—UP PERIOD ......
______—____—___—-————-
Vi MDBS25 User‘s Guide (299-210-21 Ravision A)
List of Figures FCC ID: NFRCVMDBS
Figure 1-1.
Figure 1-2.
Figure 1-3.
Network Architecture.” ...................................... 1-1
CVMDBS Unit .................................... 1-2
CVMDBS Front View
Figure 1-4. CVMDBS Block Diagram ....................................... 1-3
Figure 1-5. 00 Module LEDs ................................................................. 1-5
Figure 1—6. MX Module LEDs ................................................................. 1-9
Figure 1-7. Power Converter! Rx SIM LEDs ........................................ 1-11
Figure 2-1. CVMDBS Front Connectors ................................................. 2-2
Figure 2-2. CVMDBS Rear Connectors .................................................. 2-3
Figure 4-1. Example of BOOT.SYS File ............ 4-6
Figure 4-2. Example of .SYS File ............................. 4-6
Figure 4-3. Example of AUTOLOAD.SYS File ........................................ 4-6
Figure 4-5. Example of AUTOCFG.SYS File .r ........................ 4~11
Figure 4-5. Example of MDBS_CFG.SYS File ...4-12
MDB825 User's Guide (299-210-21 Revision A) vii
List of Tables FCC ID; NFRCVMDBS
Table 1-14
Table 1-2.
Table 2-1.
Table 2-2.
Table 2-3.
Table 2-4.
Table 2-5.
Table 4-1.
Table 4-2.
Control Computer Module LED Indicators ............................ 1-6
Modem/Transceiver Module LED Indicators 18
Front Connectors ................................................................. 2-1
Rear Connectors
Utility Port Pin Assignments. ..................... 2-4
Auxiliary Port Pin Assignments
Network Port RS232 Pin Assignments ............ .2—6
Configuration File on Disk Download ................................. 4-13
MDBS25 Configurable Network Attributes ......................... 4-14
viii
CVNDBS User’s Guide (299-TBD Draft)
Preface FCC ID: NFRCVMDBS
About This Manual
This manual is one volume of the documentation set for the ADC Compact
Voice and Mobile Data Base Station (CVMDBS). This usefs guide is intended
for use as a ready reference by experienced telecommunicatione equipment
operators to operate the CVMDBS.
This manual is supplemented by the CVMDBS Quick Installation Guide
Below is a list of the current CVMDBS manuals.
- The CVMDBS User’s Guide, PIN 299-215-22, dated July 29, 1998.
. The CWDBS Quick Installation Guide, PIN 299—217, dated xx.
Applicable Documents
- The CVMDBS Quick Installation Guide, PIN 299- 217,
dated xx.
- CVlkaBS Sofiware Release Notes, ADC PIN 299~083~22 (Shipped with
CVMDBS soitware release).
0 CVMDBS Product Specification, Appendix A: CVMDBS Allocated
Requirements, ADC PIN 5905045—001, Rev B, dated July 28, 1998.
Revision History
—m-mm
_—-_
MDBSZS User‘s Guide (299-210-21 Revision A) ix
FCC 1D: NFRCVMDBS
1. OVERVIEW
1.1 Network Architecture
The Network architecture is illustrated in Figure 1-1.
Ilouuh ssm-v mm" Ilnllnn-nl sym-
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vnulm mu Illullv vale unfifim’ws
MAp-ul vmk muon-
: . - > m —l-
n llenh """"" "W" um" um... Mung um»
w:- um
Anllou Luna-LIA.
Figure 1-1. Network Architecture
Onmwm
mdln
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um sum
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CVMDBB
CVMDBS User’s Guide (299-215-22 Draft )
1-1
Chapter 1 FCC 1D: NFRCVMDBS CVMDBS Input / Output
_’———
1.2 CVMDBS General Description
The Compact Voice and Mobile Data Base Station (CVMDBS) unit is a 19-inch,
rack-mountable, EMl/RFLshielded unit as depicted in Figure 1-2 and 1-3. The
CVMDBS unit serves as a transceiver for the transmission and reception of digital
data and digitized voice packets. The CVMDBS unit interfaces with the Base
Station Controller (BSC) unit for control and digital modem signals. The CVMDBS
also consists of the equipment necessary to interface the transceiver to the
antennas. This includes transmit power amplifiers, receive low noise amplifiers,
and an optional Tx/Rx Duplexer or Rx Pre-select Filter.
Figure 1-2. CVMDBS Unit
The CVMDBS unit has six types of functional modules and assemblies:
Control Computer (CC) Module
Modem 1 Transceiver (MK) Module
Power Converter (PC) Module
Rx Site Interface Module (Rx SIM)
Tx Site Interface Module (Tx SIM)
CVMDBS Chassis Assembly
The PC Module and Rx SIM are physically housed together as one module referred
to as the PC / Rx SIM. The remaining functional modules are each separate
physical modules, for a total of four physical modules. All the listed modules plug
into the CVMDBS Chassis Assembly. The modules communicate with each other on
the backplane as depicted in Figure 1-4.
F'P‘PPNZ"
1-2 CVIVIDBS User's Guide (299-212-22 Rev 03)
Chapter 1 FCC ID; NFRCVMDBS CVMDBS Input I Output
. w-u‘flsxm—
0 Lynn-5mm
tn. '~.
WEE—Ha °
l _ .. ..'_
To optional Tar/Rx
Duplex"
1“: RF
TX [£10
Ell! Shflun R): In
Control & Status
Rx RF
Fram Option-I
TxIRx Duplexer or
Rx Prflclecl Flu-r
Auxllllnry Port
uumy Pun
Figure 1-4. CVMDBS Block Diagram
_______—_____—————
CVMDBS User’s Guide (299-215-22 Rev 03 ) 1-3
Chapter 1 FCC 1D, NFRCVMDBS CVMDBS Input / Output
1.2.1 Control Computer (CC) Module
The Control Computer (CC) Module consists of a single board unit that slides into
the bottom right slot of the CVMDBS Chassis Assembly.
The CC Module is the management point for both oontrol and data routing within
the CVMDBS unit.
1. The CC Module acts as the primary interface to the Base Station Controller
(Unit) for the purpose of controlling and monitoring the CVMDBS unit.
2. The CO Module is responsible for controlling itself and the MX Module.
3.) The CC Module controls which RF channel is the MX Module is using for
transmitting and receiving.
b) The CO Module monitors itself and the MX Module for determination and
reporting of health and status. This information is reported to the
Network Management System via the Base Station Controller (BSC) unit
and available locally via sofizware tools.
3. The CC Module provides itself and the MX Module with operating software
and configuration information.
a) The CC Module contains all of the CVMDBS configuration information.
The CC Module contains a miniature hard disk drive on which it stores
its own soflzware, the soflware for MX Module, and all the configuration
data needed by the CVMDBS unit. Software tools can be used to transfer
the RAM-based soflrware and configuration information to the disk.
1.2.1.1 CC Module LED Indicators
The CC Module LED indicators are shown in Figure 1—5. The CC Module LED
indicators relate different information depending on the CC Module soflware state.
That is, the CC Module LED indicators provide one set of information when the CC
Module is operating under the control of ROM-based software and another set of
information when the CC Module is operating under the control ofRAM-hased
software (see Table 177).
0 Under normal conditions, the Fault LED is “ofi',” the STAT0 and STAT2
LEDs are “flashing” (at a 1/3 second rate), and the STAT1 and STATS
LEDs are “off.”
1-4 CVMDBS User's Guide (299-212-22 Rev 03)
Chapter 1 FCC lD'. NFRCVMDBS CVMDBS Input I Output
_______—_————-
9 Power On (Green)
9 Fault on (Red)
8 sum - Blinks at112 Second Rate (Yellow)
9 sun elf (Yellow)
0 Stan - Bllnks at 112 Second Hale (Yellow)
0 Stal3 Off (Yellow)
Figure 1-5. CC Module LEDs
CVMDBS Usefs Guide (299-215-22 Rev 03 ) 1-5
Chapter 1 FCC 1D: NFRCVMDBS CVMDBS Input I Output
—__————_______———
Fatal Error
Non-Tale] Error
or Coda Faull
Powar-Dn I BIT
Falal Error
Non-late! Error
Fast Blinking ‘
F851 Blinking '
Fast BIlnking’
Fast Bllnking’
‘ Bulll—in lssl (selldiagnosfics)
‘ Error Code Blinking Patterns are used by ADC technical staff lor diagnostic purposes.
’ Fast Bllnklng is approximalely three blinks per second.
‘ Slaw Blinking is approximalaly one bllnk every olhar second.
1-6 CVMDBS User’s Guide (299-212-22 Rev 03)
Chapter 1 FCC m; NFRCVMDBS CVMDBS Input / Output
1.2.2 Modem/Transceiver (MX) Module
The Modem/Transceiver (MX) Module is a single board unit that slides into the
middle right slot of the CV'MDBS Chassis Assembly.
The MX Module will support one channel stream and includes the radio transceiver
for that channel stream, At the physical layer, the MK Module supports Gaussian
filtered 4-level FSK modulation at a baud rate of 9.6 kbaud, or a bit rate of 19.2
kbps.
The radio transceiver portion of the Modem/Transceiver Module performs frequency
up—conversion and down-conversion to and from the configured RF channel within
the SMR band as commanded by the CC Module.
1. The synthesizer section of the radio transceiver provides the conversion
between RF channel number and the desire RF frequencies.
2. The transmitter section of the radio transceiver outputs a forward channel
transmit signal to the mobile unit by way of the Ti: Site Inteface Module (Tx
SIM). ‘
a) The transmitter modulates the transmit In-phase and Quadrature
baseband received from the BSC unit onto the transmitted carrier.
b) The transmitter output drives the power amplifier in the Tx SIM. The
output signal is normally turned on or off under microprocessor control,
but there is also a front-panel toggle switch which allows the output stage
of the transmitter to be manually disabled.
3. The receiver section of the radio transceiver inputs the reverse channel
receive channel from the mobile unit by way of the PC / Rx Site Interface
Module (PC / Rx SIM).
a) The receiver accepts amplified RF input from the RX Site Interface
Module (Rx SIM).
b) The receiver demodulates the receive RF carrier signal into receive In-
phase and Quadrature baseband signal for output to the BSC unit.
The remaining portion of the Modem / Transceiver controls the MX Module's radio
transceiver as well as controls the Tx SIM.
1.2.2.1 MX Module LED Indicators
The MIX Module LED indicators are shown in Figure 1-6. The MX Module LED
indicators relate different information depending on the MX Module sofiware state.
That is, the MX Module LED indicators provide one set of information when the Mix
Module is operating under the control of ROM-based software and another set of
information when the MX Module is operating under the control of RAM-based
software (see Table 1356.
9,
0 When the 1le Module is operational, the Fault LED is “off,” Code LED is
“flashing,” and the Online LED is “illuminated.”
CVMDBS User's Guide (299-215-22 Rev 03 ) 1-‘7
Chapter 1 FCC lD: NFRCVMDBS
CV'MIDBS Input/ Output
7’—————
_—._’——
’}~
Table 1-5.’ Modem/Transceiver Module LED Indicators
“WE
«a:
Pawn-On I BIT'
Fatal Error
Code Fault or
Non-inlal Error
Power-On I arr‘
Falal Error
Non-fatal Error
Nurrnal Opemlon
' Built-in [951 (self-diagnomics).
Error Code Blinking Panams are used by ADC technical small for diagnosflc purposes.
Fast Blinking ls approximalaly lhree blinks per second.
‘ Slow Elinklng is approximately one bnnk every other saconi
Error Code Panam‘ Fast Blinldng'
Fm Blinklng‘
Fast Blinking'
1-8
CVMDBS User's Guide (299-212-22 Rev 03)
Chapter 1 yes lD: NFRCVMDBS CV‘MDBS Input! Output
Transmitter RF Output Port
Transmit Power Off/Auto Switch
9 Power On (Green)
9 Fault On (Red)
9 sum - Blinks at 112 Second Bale (Yellow)
0 Stan On (Yellow)
Receiver RF Input Port (Main)
Figure 1.3. MModule LEDs
NOTE:
When the MX Module is operating lrom HAM-based software, the Online LED Indicalss when
the transm'mer is enabled (by software oonlrol) lo transmit.
CVMZDBS Usefs Guide (299-215-22 Rev 03 ) 1-9
Chapter 1 FCC 1D: mcvmoss CVMDBS Input / Output
1.2.2.2 MX Module Transmit Power Switch
The Transmit Power Off/Auto Switch, shown in Figure 1-6, can be used to control
the transmitter output power for local test purposes. In the 0 position, transmitter
output is disabled. In the 1 position, transmitter output power is controlled by the
configuration file, the CC Module, and the Network Management System.
1.2.2.2.1 Transmitter Failure Detection
The Transmit Power OFF/AUTO switch (shown in Figure 1-6) uses detection
circuitry that senses when the switch is in the Off position and provides the
information to the MX Module central processor. If the MX Module processor
detects the switch in the Off position, and the associated channel stream is enabled,
the MX Module generates a TX Power Failure alarm. The MX Module also
generates a TX Power Failure in the reverse situation where the switch is set to
Auto, and the channel stream is disabled.
1.2.3 Power Converter / Receive Site Interface Module
The Power Converter / Receive Site Interface Module (PC / Rx SIM) slides into the
middle right slot of the CVMDBS Chassis Assembly.
The power converter portion of the PC / Rx SIM converts 115 VAC to the internal
power levels required by the CVMDBS modules.
1. The PC Section will control the sequencing of the voltage forms during power
turn-on as required by the CVMDBS modules.
2. The PC I Rx SIM has two status lines which are periodically read by the CC
Module. The first line is an over-voltage status line and the second is an
under-voltage status line. Their operational status is reported via alarms.
3. The PC / Rx SIM has two control lines that can be asserted by the CC
Module in the event of a power supply fault, i.e., over-voltage, under-voltage
(over—current) condition. In normal conditions, the CC Module cannot assert
control over the power supply through these two control lines. However,
afl'er these control inputs are enabled, the CC Module can turn-ofi' the power
supply at any time regardless of internal power supply conditions.
The receive portion of the PC / Rx SIM provides an RF signal interface between an
external antenna / filters I duplexer and the MX Module.
1. The Receive Site Interface Section shall provide gain to receive RF signals as
a precursor to passing the signals to the CVMDBS MX Module.
1.2.3.1 PC / Rx SBVI LED Indicators
The PC / Rx SIM LED indicators are shown in Figure 1-7. When the PC / Rx SIM
Module is operating normally, the LEDs are illuminated as follows:
- Green = On, indicates that power is applied to the power supply.
. Red = remains Off (if it is On, there is a fault condition)
1-10 CVMDBS User’s Guide (299-212-22 Rev 03)
Chapter 1 FCC ID: NFRCVMDBS CVMDBS Input I Output
Figure 1-7. Power Converter/Rx SIM LEDs
CVMDBS User's Guide (299-215-22 Rev 03 ) 1-11
Chapter 1 FCC 1D; NFRCVMDBS 0VMDBS Input / Output
1.2.4 Transmit Site Interface Module
The Transmit Site interface Module (Tx SIM) houses the Power Amplifier (PA) in
an enclosure that slides into the left slot of the CVMDBS Chassis Assembly.
The T1: SIM provides an RF interface between the MX Module and an external
antenna / filters / duplexers.
1. The Tx SIM provides high power gain to transmit RF carrier signal supplied
by the MX Module.
a) RF power can be manually adjusted from less than 10W to more than 75
Watts, allowing easy adjustment to the power requirements of individual
sites.
Digital control of output power is driven by the MK module which, in turn, is
controlled via the configuration file, the CC Module, and the Network Management
System. In particular, once the PA’s power level has been manually set, it can be
adjusted downward via software commands a total of 7 steps where each step is 4
dB. Thus, the PA can be adjusted via software down a total of 28 (113.
NOTE
The input signal lo Tx SIM from the MX module is at a relallvely low level . approximately, 0 dBm.
1.2.5 CVMDBS Chassis Assembly
The CVMDBS Chassis Assembly is the primary building block for the CVMDBS
unit, providing support for the CVMDBS modules.
1. The CVMDBS Chassis Assembly provides housing and mounting for the
CVMDBS modules. As part of this role, the CVMDBS Chassis Assembly
contains a backplane to interface the CVMDBS modules.
2. The CVMDBS Chassis provides mounting and cooling for the entire
CVMDBS unit. The CVMDBS provides mounting flanges for mounting in a
standard 19 inch tack. Two fans provide airflow across the other CVMDBS
modules.
3. The CVMDBS Chassis provides power filtering for the entire CVMDBS unit.
4. The CVMDBS Chassis provides a power circuit breaker, which also acts as
an ON/OFF Switch.
NOTE
The circuit breaker is rated at 10 Amps @ 115 VAC.
5. The CVMDBS Chassis provides an internal reference clock.
1-12 CVMDBS User’s Guide (299-212-22 Rev 03)
2. INPUT / OUTPUT FCC‘D=NFRCVMDBS
2.1 Connector Identification
The CVMDBS unit provides external fronl: access to the connectors identified in
Table 2-1 and shown in Figure 2-1.
Table 2-1. F rant Connectors
SMB Jack 550 um!
Receive Q Baseband SMB Jack 580 Unit
Tvansmit I Baseband
Transmit Q Baseband
MX Receive SMA Iemale PCI Rx SIM
MX Transmit SMA Iemale Tx SIM
Power Amplifier Out N female Antenna, Duplexer, or Filler
MX Transmitter In SMA female MX
Receive Antenna HUNTENNA N female PCI Rx SIM Antenna, Duplexer, or Filter
MX Receive om MX_RX_OUT SMA Iemale PC / Rx SIM
Ulility Port PC I Rx SIM BSC Unll or PC Tool
Auxiliary Port PC I FIX SIM LSAM
The CVMDBS unit provides external front access to the connectors identified
in Table 2-2 and shown in Figure 22.
Table 2-2. Rear Connectors
M . v._ _' . “A".
Network Pen CVMDBS Nelwork Aocees Device
Chassis
Assembly
Main Input Power IEC slanda'd 3 CVMDBS External Power
(AC) pin connector Chassis
Assembly
CVlVIDBS User's Guide (299-216-22 Draft) 2-1
Chapter 2 FCC ID: NFRCVMDBS CVMDBS Input I Output
. O O 00
lfi
000 000
Figure 2-1 CWDBS Front Connectors
2-2 CVMDBS User's Guide (299-212-22 Rev 03)
FCC ID: NFRCVMDBS CVMDBS Input , Output
Chapter 2
Fl— ,,,
Figure 2-2 CVMDBS Rear Connectors
CVIVIDBS User‘s Guide (299-215-22 Rev 08 )
2-3
Chapter 2 FCC ‘91 NFRCVMDBS CVMDBS Input / Output
__’__———
2.1.1 Utility Port
The CVMDBS unit's Utility Port is used for base station control and statusing,
maintenance, and configuration purposes.
1. The Base Station Controller (BSC) unit provides limited control and accepts
limited status via the utility port.
2. An IBM—compatible PC can be connected to this port to download code,
transfer code and configuration files to the CC Module hard disk, and
perform limited control and statusingl
3. The Utility Port is an asynchronous RS-232 type serial interface supporting
data rates from 1.2 kbps up to 38.4 kbps.
4. The Utility Port pin and signal assignments are shown in Table 2-2.
Table 22 Utility Port Pin Ass' nments
Utility Pon Receive Dela
Utility Port Transmit Dale
2-4 CVMZDBS User's Guide (299-212-22 Rev 03)
Chapter 2 FCC ID; NFRCVMDBS CVMDBS Input / Output
____—__———
2.1.2 Auxiliary Port
The CVMDBS unit's Auxiliary Port provides an interface to the optional Local
Status and Alarm Monitor (LSAM) unit.
1. The Auxiliary Port is an asynchronous RS-232 type serial interface. 7
2‘ The Auxiliary Port pin and signal assignments are showu in Table 29.
Table 2,3Awu' 'ary Port Pin Assignment:
omflmmhmma
Note: Pin 5 is connected to Shield Ground through Backplane jumper
2.1.3 Network Port (NET_P)
The CVMDBS unit‘s Network Pelt interface provides an interface for remote
Network Management System control separate from the 1350 unit.
1. The Network Port interface is changeable between v.35 and R5232. The
standard serial connection will be RSZ32, but this can be changed in the
field.
NOTE
The Fls-232 standard specifies that thls interface should be lim'ned to a maximum dale
rate of 19.2 kbps over a cable length of 50 feet.
NOTE
The CClTl' v.35 standard specifies that this interface can be used with data rates
above 45 kbps, and VBS is the prevalent interface to 56 kbps common carrier digilal
transmission facilities.
2. The Network Port pin and signal assignments are shown in Table 2-4.
CV'MDBS User's Guide (299-215-22 Rev 03 ) 2-5
Chapter 2 FCC lD: NFRCVMDBS CVMDBS Input: / Output;
Table 2.4 Network Parr RSZ32 Pin Assignments
TXDOUT Transmit date (Differential for v.35. non- Control Computer Module
ditterential tor RS»232)
RXDIN Ftecetve data (Dilterentiel tor v.35, non- Network or DSUICSU Module
diflerential tor RS-232)
Request to Send Control Computer Module
Clear to Send Network or DSUICSU Module
Data Set Ready Network or osurcsu Module
Data Carrier Detect Network or DSU/CSU Module
Inverse ct TXClN Network or DSU/CSU Module
Inverse ct RXCIN Network or DSUICSU Module
Inverse ol TXCOUT Control Computer Module
Inverse of TXDOUT Control Computer Module
Inverse of HXDIN Network or DSUICSU Module
Transmit data clock (Diflersntiel lor v.35, Network or DSUICSU Module
nowdiflerential tor RS»232)
Receive data clock (Dillerential tor v.35, Network or DSU/CSU Module
non-dltterenual for IRS-232)
Dittsrontlal transmit clock from CVMDBS. Control Computer Module
(Not used by res-232)
2-6 CVIthS User’s Guide (299-212-22 Rev 08)
FCC ID: NFRCVMDB S
3. OPERATOR COMlVIAND TOOLS
3.1 CVMDBS Utility Program Tools
ADC has developed the MDBS Utility Program (MUP) snfizwere for downloading
and initializing the CVMDBS.
3.1.1 CV'MDBS Utility Program Tools Capabilities
Downloading CVMDBS program code, initialization and management are performed
by using the following MUP Tools:
3.1.1.1 MUP Tools for PC
Disk Manggment Utilities
Loopy Makes copies of a file on the CC hard drive.
f_create Created a new file on the 00's hard drive.
f_del Deletes a file on the CC hard drive.
f_dir List files on GO hard drive.
f “get Retrieves a file from CC hard drive to PC hard drive
f_1ist List the contents of a selected file from the CC hard drive
f_put Move a file from PC hard drive to CC hard drive.
f_rename Rename a file on the CC hard drive.
Statusigg Utilities
he_poll Executes a health and status poll command.
Qogtrol & Initialization Utilities
dnld Downloads code to the CC or MX Module.
reset Executes a reset on the CC and / or MX modu1e(s).
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4. CVMDBS POWER-UP, PROGRAM LOAD,
AND CONFIGURATION
4.1 Overview
The CVMDBS initializes itself upon power from on-hoard ROM software. Afier
initialization, the waits for download of software to RAM from an external source.
Details about the process are provided in the following sections:
. Section 4.2, entitled “CVMDBS Power On"
a Section 4.3, entitled “CVMDBS Program Code Download”
In addition, the CVMDBS can be enabled to automatically load its program code
and configure itself in the event of data loss caused by a reset or power failure. To
use these options, the CC module must have a formatted hard disk that contains
specific files required to perform these functions. The specific files can be
transferred to and stored on the CC Module's hard disk. For more information
about these options, refer to the following sections:
- Section 4.4, entitled “CVlVEDBS Program Code on Disk Feature”
- Section 4.5, entitled “CVMDBS Configuration File on Disk Feature”
4.2 CVMDBS Power-on
The following procedure describes how to apply power to the CVMDBS:
1. To power-on the CV'MDBS, the following CVMDBS switches must
be set at the cell site:
- CV'MDBS Chassis Assembly Power switch pushed in (see
Figure 1-2),
- The MX Transmit switch to its 1 setting (see Figure 1-6).
2. If the automatic download option is not used, in about 30 seconds
the CC and MX modules' LEDs display a pattern (showu below)
that indicates the CVMDBS is operating from ROM (no code
loaded).
CC module LED status when operating from ROM:
LED Status
Power On
Fault On
StatO Slow Blinking Pattern
Stat]. Off
StatZ Slow Blinking Pattern
Stat3 Off
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____——————
MX module LED status when operating from ROM:
@ M
Power On
Fault On
Code Slow Blinking Pattern
Onliue Ofi‘
Afier the LEDs are illuminated as above, wait one minute, then continue to the
Section 4.3, entitled “CVMDBS Program Code Download”
4.2.1 Initialization Failure after a Power-on
If the CVNEDBS fails to initialize properly alter it is powered-on, use the following
procedure to restore the program code:
1. Power-off the CVMDBS and slightly pull out the PC / Rx SIM.
2. After one minute, re-seat the PC/Rx SIM and power-on the
CVMDBS.
4.2.2 CVMDBS Reset Procedure
2. To reset the MX Module, enter the following commands:
A. For a Hard Reset to erase MX RAM code: Use the utility port
and MUP Tool “reset" and type:
reset 2 -y 
B. For a Sofl: Reset to only erase the MX configuration
information: Use the utility port and MUP Tool “reae ":
reset 2 
NOTE
A Hard Reset command clears all data stored in the Module's RAM; this includes
the CVMDBS pmgmm code and its configuration data. A Soft Reset command
clears the oonfiguratlon data only and maintains the CVMDBS program code.
1. To reset the CC Module in slot 0, enter the following oommands:
A. For a Hard Reset to erase CC RAM code: Use the utility port
and MUP Tool "reset":
reset 0 -y 
B. For a $011; Reset to only erase the configuration information:
Use the utility port and MUP Tool “reset"
reset 0 
NOTE
Wait at least two minutes before proceeding further.
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FCC ID: NFRCVMDBS
4.3 CVMDBS Program Code Download
The CVMDBS program code can be downloaded at the local cell site from an
external source. Local downloads use the CVMDBS Utility port (RS—232 interface),
as defined in Section 2.1.1, entitled “Utility Port”.
4.3.1 Downloading Program Code at the Cell Site
To download the CVMDBS program code at the cell site, an 80386-based PC or
better is required. A serial connection must be made between the CVMDBS Utility
port and the PC COMl serial port. The operational code is downloaded to RAM in
the Control Computer and Modem/Transceiver modules.
The CVMDBS program code is downloaded to RAM in the CC and MX module; each
board must be individually downloaded. (See Section 4.3.3, entitled “Software
Download Procedure” in this chapter.) A local download uses the Utility port which
operates at 38.4 kbps, requiring approin'mately two-to—three minutes to download
code to a CC module and approximately one minute to download code to an MK
module.
4.3.2 Facts to Know Before Downloading CVMDBS
Program Code
Before starting a program code download, it is important to note the following:
- Data transfer across both the Network and Utility port is performed by the
CC Module. At system start-up, the CC Module performs self-testing
during which time the CC Module cannot interface to either of these ports;
it is dedicated to its own internal start-up process.
NOTE
If you attempt to download to a MX Module while the CC Module is in the start-up
process. the MX Module download will fail. If a (allure occurs, refer to ihe Seclion
4.2.1, entilled ‘lnitializalion Failure After a Power-on.”
4.3.3 Software Download Procedure
The following software download procedure needs to be performed while the
CVMDBS is operating from ROM: (following a power-on or Hard Reset)
1. Enter the following sofiware commands to download CC RAM
program code to the CC Module:
A. For a local download using the utility port and MUP Tool
"dnld", type:
dnld 0 cc_f0m.dll .
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Chapter 5 FCC “1 NFRCVMDBS CVMIDBS Input / Output
NOTE
- Code is now being downloaded to lhe 00 Module in slot 0. Wait two
minutes before proceeding further.
When the download is complete the CC Module’e LEDs will
behave as follows:
CC module LED status when operating from RAM:
LED Status
Power On
Fault Off
StatO Fast Blinking Pattern
Stat] Off
Statz Fast Blinking Pattern
Stat3 Off
2 Enter the following sofiware commands to download MX RAM
program code to the MX module:
A. For a local download using the utility port, type:
fluid 2 sanxxlell ‘
NOTE
- Code is now being downloaded to the MX module in the slot 2. Wait two
minutes before prooeeding funher.
When the download is complete, the MX Module’s LEDs will
behave as follows:
MX module LED status when operating from RAM, but not
configured:
LED
Power
Fault
Code
Online
smug
On
Off
Fast Blinking Pattern
Off
4-4
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4.4 CVMDBS Program Code on Disk
The CVMDBS Program Code on Disk feature enables the CVMDBS to automatically
load the program code, stored on the CC Module’s hard disk, to RAM. This event is
initiated by an CVMDBS reset (specifically a Hard Reset) or caused by a power
failure reoovery.
The CVMDBS Program Code on Disk operation is executed only from the CC
Module. This feature allows the CVMDBS to automatically download its program
code to RAM without intervention from a Network Management System.
To prepare the CVMDBS to run the CVMDBS Program Code on Disk option, three
files must be present on the CC Module’s hard disk:
- AUTOLOADSYS Used as a semaphore to indicate the Program
Code on Disk option will be used. The file
contents are ignored.
' BOOT.SYS Lists the CVMDBS Program Files (e.g.
V2H20.SYS, V2_21.SYS)
' .SYS Indicates which program code file (.DLL) to load
for each module. These specific (.DLL) files, as
well as the program code files, must be stored in
the root directory.
N OTE
The .SYS file contains the following configuration data:
Chassis Number (0)
Slot Number (0-2)
.dll Object (DEFAU LT_CC or SM)
.dl| file name (<flle name>.dll)
_—_____—._____——_———-——
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Chapter 5 FCC 1D: NFRCVMDBS CVMDBS Input I Output
__”——
4.4.1 Preparing the Hard Disk to Automatically Load
Program Code
To prepare the CC Module's hard disk to automatically download program code,
three files must reside on the CC Module's hard disk: AUTOLOADSYS,
BO0T.SYS, and ‘SYS. Using Sofiware Release Version 2.2 as an
example, follow the procedure below to prepare the hard disk to automatically load
program code to the CVMDBS.
1. Create the BOOTSYS file using a standard text editor (see Figure 4-1).
#CVMDBS BOOT‘SYS file for Software Release v2.20
V2_20.SYS
#End of BOOT.SYS file
Figure 4-1. Example of BOOTSYS File
N OTE
Comments are denoted by any text proceeded by "it."
2. Create the V2_2048YS file using a standard text
editor (see Figure 4—2).
#CVMDBS Software Version 2.20
‘ * DEFAULT_CC CC_F0220.DLL #Default 00 RAM dll code
' ' SM SM_F0220.DLL #SM RAM dII code
#End of V2_20.SYS file
Figure 4—2. Example of .SYS F112
3‘ Create the AUTOLOADSYS using a standard text editmx (The
contents of the file are irrelevant, only the presence of the file is
required.) Figure 4-3 below shows an example AUTOCFGSYS
file.
#AUTOLOAD.SYS file for Soflware Release Version 2.20
#End of AUTOLOADSYS file
Figure 43. Example of AUTQLOAD.SYS File
4. If required, power-en the CVMDBS (see section entitled
“CVMDBS Power‘On” below).
5‘ Check the current files on the hard disk by using MUP Tool
"f_dir".
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Chapter 4
10.
11.
FCC 1D, NFRCVMDBS CVMDBS Input / Output
Remove any unwanted files using the MUP Tool "f_del".
Check the amount of disk space required on the hard disk (for the
files listed above).
Verify enough space is available on the hard disk by using MUP
Tool "f_dir".
NOTE
The CC_F0)o,SYS file called
out in the BOOTSYS file.
at
b.
If the .SYS file is found, the CVMDBS
performs the action in Step 5
Ifthe <30fiware uersion>.SYS file is not found, the CVMDBS
downloads the CC_IOP code from ROM. This enables
communications between the CVMDBS and external tools.
After the CC__IOP code is downloaded, the CVMDBS enters a
wait for download state. The program code must now be
downloaded manually via the Utility Port. Refer to the
Section 4.3, entitled “CVMDBS Program Code Download
Procedures".
The CVMDBS searches for a file named .dll (see Note
below).
a.
If the .dll file is found, the CVMDBS loads the
program code from the CC Module’s hard disk to RAM. The
CVMDBS then performs the action in Step 6.
If the .dll file is not found or cannot be loaded
successfully, the CVMDBS downloads the CC _IOP code from
ROM. This enables communications between the CVMDBS
and external tools. After the CC_IOP code is downloaded,
the CVMDBS enters a wait for download state. The
program code must now be downloaded manually via the
Utility Port. Refer to the Sedion 4.3, entitled “CVMDBS
Program Code Download Procedures".
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___—-————
NOTE
0 It is not required that .d|| be the first .dli obiecl specified. but .dil overrides any other .dII object llsted for the current address It multiple
tdll files exist, only the first-specified is used.
o It a .d|i is found and downloaded successfully to the cc RAM. the
CVMDBS loads the SYS file to use. The CO RAM code reads the
.SYS file each time a module requests a download It a module
requesting a download is not listed. or covered in the .SYS file,
a minor alarm is issued without disrupting normal operations.
If the SM.dll file is found, the CVMDBS loads the program code
from the CC Module’e hard disk to the CC RAM and subsequently
to the MX RAM.
NOTE
When a new version of CVMDBS program code is released. the upgrade may not effect
both the Control Computer (CC_F0xxx.DLL) and Modem/‘I'ransceiver (SM_F0xxxDLL)
program code files. For example. suppose the new CVMDBS software program version
2.21 is released and replaces the previous version 2.20. It the CC Moduie’s program
code did not change with this release but the MIX program code did change, the
Software Release V221 module oode update iilee would appear as:
CCJOZZODLL (previous version)
SM_F0221.DLL (new version).
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Chapter 5 FCC to: NFRCVMDBS cvMDBS Input / Output
4.5 CVMDBS Configuration File on Disk Option
The CVMDBS Configuration File on Disk (CFD) option enables you to automatically
download the CVMDBS configuration data stored in a file on the Control
Computer’s hard disk to RAM. This operation is activated by an CVMDBS reset
(either a Hard Reset or Soit Reset), or a power failure recovery. The CVMDBS self-
oonfiguration operation is performed by the CC Module which is responsible for
configuring the CVMDBS. The CFD option enables the CVMDBS to auto-configure
without intervention from a Network Management System (NMS).
NOTE
- A Hard Reset command clears all data stored in the CC Module’s RAM: this
includes the CVMDBS program code and its configuration data. A Soft Reset
command clears the configuration data only and maintains the CVMDBS program
code.
The CVMDBS has three external states that Indicate configuration status:
Unconligured state indicates the CVMDBS program code is loaded but it is not
configured to iorward or receive CDPD traffic. On-Line and Ofi-Line states both
indicate the CVMDBS is configured and operational.
This feature does not permit dynamic changes to configuration file after it has been
loaded onto the hard disk. When the CVMDBS CFD option is activated by a Hard
Reset or Soft Reset, the CVMDBS configures itselt based on the intomtation in the
configuration file at the time it was loaded onto the hard disk (not based on the
CVMDBS memory resident configuration at the time of the reset).
To prepare the CVMDBS to run the CVMDBS Configuration File on Disk option,
three files must be present on the CC Module’s hard disk:
- AUTOCFGSYS Used as a semaphore to indicate the
Configuration File on Disk option will he used.
The file contents are ignored.
' MDBS_CFG.SYS Contains the name of the Configuration file that,
will be used to auto-configure the CVMDBS after
a reset.
'  Contains the CVMDBS configuration data that
is used to auto-configure the CVMDBS after a
reset. This filename must conform to the DOS
file naming convention as described in Section
4.5.2 entitled “Preparing the Hard Disk to
Automatically Configure the CVMDBS."
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4.5.1 Enabling and Disabling the Configuration File on
Disk Feature
The Configuration File on Disk feature can be controlled by the using the MUP
Tools "f_create" to create the AUTOCFGSYS file and "f_del" to delete the
AUTOCFGSYS file.
4.5.2 Preparing the Hard Disk to Automatically Configure
the CVNfl3BS
To prepare the CC Module’s hard disk to automatically download program code,
three files must reside on the CC Module’s hard drive: AUTOCFGSYS,
MDBSgCFGSYS, and .
Follow the procedure below to install and activate the CVMDBS Configuration File
on Disk option.
1. Create the AUTOCFGSYS file by using a standard text editor.
The contents of the file are irrelevant; only the presence of the file
is required. Figure 44 below shows an example AUTOCFGSYS
file.
#AUTOCFG.SYS file for Sohware Release Version 2.20
#End of AUTOCFG.SYS fiie
Figure 4-4. Example ofAUTOCFG.SYS File
2. Create the MDBS_CFG.SYS file by using a standard
text editor. The file must contain the name of the
configuration file to be downloaded. Figure 4-5 shows
an example MJDBSgCFGSYS file.
NOTE
The configuration file name must adhere to the following DOS file naming
convention:
. Up to eight alphanumeric characters optionally followed by a period (“.")
and up to three additional alphanumeric characters.
(Lower case letters are automatically enlivened to upper case.)
. Use 0! the underscore character ("_') is permil‘led
- Embedded while space characters are not allowed.
CVMDBS User’s Guide (299-215-22 Rev 03 ) 4-11
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7__—_———___’———
#CVMDBS Configuration Version File (or MDBS 2.20
#Dale of creallon: August 22. 1998
#Created by John Baker
it
mdb5220.clg #CVMDBS contiguralion file to be used
#End of CVMDBS Version Configuration File
Figure 4-5. Example of MDBS_CFG.SYS File
3. If required, power-on the CVMDBS (see Section 4.1, entitled
“CVMDBS Power-On").
4. Check the current files on the hard disk by using MUP Tool
"f_dir“.
5. Remove any unwanted files using the MUP Tool "f___del".
6. Verify enough space is available on the hard disk by using the
MUP Tool "f_dir“.
NOTE~
The configuration files can be as large as 20 Kbyles of disk space.
7. Use the MUP Tool “f_put" to transfer the AUTOCFGSYS,
MDBS_CFG.SYS, and  files.
8. Verify all files are transferred by using the MU? Tool "f_dir“.
9. To initialize the CVMDBS with the new configuration file, use the
MUP Tools "reset 0 -Y" to issue a Hard Reset or "reset" to issue a
Soft Reset. The new configuration data is downloaded
automatically.
NOTE
A Hard Reset command clears all data stored in the CC Module’s RAM; this
Includes the CVMDBS program code and its configuration data. A Solt Reset
command clears the configuration data onty and maintains the CVMDBS
program code.
4.5.3 CVMDBS Auto-Configuration Process
After the CC Module hard disk is set up to support the CVMDBS Configuration File
on Disk option, the sequence of events listed in Table 4-1 occur following any
CV'MDBS reset or a power failure recovery. If one of the events listed below fails to
meet the validation criteria, an error is generated and the CVMDBS remains in an
unconfigured state.
4-12 CVMDBS User’s Guide (299-212-22 Rev 03)
Chapter 4
1. CWDBS software program looks at the Control
Computers hard disk for the AUTOCFG.SYS
fiie.
. Once the AUTOCFGtSYS tile is lound, the
CVMDBS continues to search the hard disk for
the MDBS_CFG.SYS lile.
l Once the MDES_CFG.SYS file is found and the
name is validated, the CVMDBS checks to see it
it contains a valid configuration filename.
. Once the Configuration fiiename is validated the
CVMDBS validates the configurable network
atrn'butes'(see Table 2-2); following validation
the CVMDBS downloads the network attributes“
from the Control Computer Module‘s hard disk
to memory resident RAM.
5. Once the network atlnbules are down-loaded,
the CVM DBS opens the Configuration tile and
validates the software revision level and the
' remaining CVMDBS configurable artribufes'
(see Table 2-2). Following validation the
CVMDBS downloads the CVMDBS configurable
annbutes'irom the Master Control Computers
hard disk to memory resident RAM‘
FCC ID: NFRCVMDBS
Table 4-1. Configuration File on Dish Download
CVMDBS Input / Output
An AUTOCFGSYS file is not lound on the hard
disk.
AlamName: No AUTOCFG File on Disk
An MDBS_CFG.SYS lite is not lound on the
hard tflslc
gamma: No MDBS_CFG File on Disk
The MDBSACFGSYS tile is lound but does not
adhere to the required file lormal as shown in
Figure 2-5 or does not adhere to the DOS lite
naming convention as described In Section
4.22.2. Step 2, entitled: “Preparing the Hard
Disk to Automatically Configure the CVMDBS.”
Atamuame: MDBS_CFG file Format Failure
The configuration filename Is not lound In the
MDBS_CFGtSYS file.
Alammlam; Specified Configuration File Not
on Disk
The configurable network attributes tailed to
meet the parameter validation mles.
Alamluama; Network Provisioning Parameter
Failure
The Configuration File was built with an version
number prior to Version 3.0.
MUnaoceptable Configuration File
Revision Number
The configurable CVMDBS attributes tailed to
meet the parameter validation rules.
AlamLNME: Full Configuration Failure
* Network attributes are those listed in Table 4-2, CVMDBS configurable attributes
are all other configurable parameter.
CVMDBS User’s Guide (299-215-22 Rev 03 ) 4-13
Chapter 5 FCC ID: NFRCVMDBS cvrvmes Input / Output
Table 4-2. CVMDBS Configurable Network Attributes
its, légtttrlbutej _ , V 'f_pascrtptlon ~
De
Data Link Connection Uniquely dentifies the tram relay permanent virtual circuit
identifier (DLCI) (PVC) used between the CVMDBS and MD~lS /6
MDBS lP Address CVMDBS’s IP Address as It Is seen by the Network Manager
via the D50 interface. M
IP Subnet Mask IF parameter that routes external packets; must be supplied by a ‘ “5-
the CDF’D network administrator. a“ -
Frame Relay Protocol Type ol MD~IS connected to the CVMDBS (ESl or RETIX).
Dso Fault Detection Turns ON and OFF the “D80 Fault Detection” teature.
Frame Relay N1 Number of retries when changing from XON to XOF F and vice
versa.
Frame Relay T1 Tlme between each Ni retryt
Frame Relay T2 Time between status messages for a given channel stream.
Frame Relay T3 Amount at time, when no data or (low control Indication is
received. before a channel stream goes OWN-service. 30
LMl Operatlonat State Activates the LMI protocol. Applicable only to MDLP over UDP. m
LMl T391 Time between LMl heartbeat messages. ,
LMl N39] Polling cycle tor lull status messages.
LMl N392 Number of errors allowed in N393 events belore LMI considers
the BS!) link to the cVMDBS to be out-ct-servioe.
LMt N393 Number of error-tree consecutive events that must occur tor the
CVMDBS in use connection to be considered in-servlce.
MDBS Utility Protocol Constant Value Is 16448 - do not change. This parameter
Rx UDP Port Number allows the internal router to determine which software feature
requires the message as transmitted from the MD-IS.
MDBS Utility Protocol
Tx UDP Part Number
Constant Value is 16443 - do not change. This parameter
identifies the port number used by the task handling all utility
intertace commands at the MD—IS.
SNMP Read Community When the SNMP Agent receives a get request, it compares the
String request’s read authentication field to this parameter.
SNMP Write Community When the SNMP Agent receives a set request it compares the
String request's wrote authentication field to this parameter‘
Trap List Trap Managers‘ IP Addresses; this attribute will accept 0
through 12 entries.
‘IF 44< neéwwt port I3 nut can), ‘fI-r. awl-1003 (nfl‘v,ur't/<
Mtwuk AH-rqus Sim/a bu Int} -f— 41m; animal/A
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4.5.4 Configuration File on Hard Disk Completion
Before the configuration file (specified in MDBS_CFG.SYS) is written to RAM, the
AU’I'OCFG.SYS file is deleted from the CC Module’s hard disk. This prevents a
looping condition whereby the CVMDBS experiences a reset during the self-
configuration process. When the self-wnfiguration operation successfully
completes, all configurables are written to the CC Module’s RAM, and the
AUTOCFGSY S file is re-crested on the CC Module’s hard disk.
The CVMDBS then attempts to enable the Channel Streams and transitions to an
art-line or off-line state.
CV'MDBS User’s Guide (299-215-22 Rev 03 ) 4-15
FCC ID: NFRCVMDBS
5. OPERATION NOTES
5.1 Chassis Grounding
The CV'NEDBS unit provides an external ground point to tie the CVMDBS to earth
ground. A ground hole and 10-32 screw are located in the rear of the CVMDBS.
5.2 Power Circuit Breaker
The CVMDBS unit provides a circuit breaker as a means of power control (on I off)
and power safety (current draw).
NOTE
The circuit breaker is rated at 10 Amps 6 115 VAC.
5.3 Thermal Cutoff Switch
The CVMDBS unit provides automatic shutdown when the internal operating
temperature is in the range of 60°C.
1. The thermal switch is self-resetting when the temperature drops below a
nominal temperature of 55°C.
5.4 Clock Reference
For CVMDBS frequency synthesis, the CVMDBS unit uses the internal clock
reference Ovenized Crystal Oscillator (OCXO).
1. The OCXO provides a stable clock signal to all clocks residing within the CC
Module and to the backplane.
2. In tum, the backplene clock provides a clock source for the MX Module.
' The CC Module phase-locks all clocks to the Clock Reference. The CC Module's
15.36 MHz master clock locks onto the clock source within two minutes from power-
on or reset, at which time the CC Module indicates master lock to the MX Module.
NOTE
A warm-up lime must be satisfied before the CC Module indicales master Iocklo
lhe MX Module (see “OCXO Warm-Up Period" below).
CVlVIDBS User’s Guide (299-215-22 Rev 03) 5-1
Chapter 5 FCC 1D: NFRCVMDB S CVMDBS Input I Output
5.4.1 OCXO Warm-Up Period
The CVMDBS unit requires that the OCXO warm-up period be met before the CC
Module can indicate master lock to the 1le Modules. The OCXO warm-up period
within the configuration file should be set to 20 minutes to ensure the OCXO
reaches its specified accuracy.
1. The OCXO accuracy requirement is -«.- 0.01 ppm.
2. The M'X Module sofiwars frequency-tracking-loop ensures that the TCVCXO
tracks the backplane clock. The MX TCVCXO frequency locks to the
backplene clock providing transmitter stability to 10.02 ppm over the
operating temperature range. (Provided that the OCXO accuracy is a: 0.01
ppm).
3. The RF output signal stability is a function of the MX TCVCXO reference
stability. The MX Module synthesizer generates 851 to 869 MHz Local
Oscillator frequencies for the TX and RX modules by using a VCO that is
frequency and phase-locked to the MX TCVCXO master clock reference.
If desired, the transmit output on time can be shortened to two minutes by
bypassing the warm-up period in the configuration file. (The system default
bypasses the warm-up period). In this situation, the transmit output accuracy will
not be within specification limits until 20 minutes have passed.
5-2 CVMDBS User‘s Guide (299-212-22 Rev 03)

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