User Manual
Table Of Contents
- 1. INTRODUCTION
- 1.1 Scope and Purpose of document
- 1.2 Limitation of Liability Notice
- 2. SAFETY CONSIDERATIONS
- 3. MASTER SITE RACKS (50-078001)
- 3.1 Master Site Description
- 3.P Master Site Rack Photos
- 3.2 Master Site Electrical Specification
- 3.3 Master Site Mechanical Specifications
- 3.4 Master Site Parts List (50-078001)
- 3.5 Channel Frequency Listing
- 3.6 Master Site Drawings
- 3.7 800MHz Air I/F + BSCE Uplink Shelf (50-078002)
- 3.8 800MHz 8Ch. Channel Module Sub-Rack (50-078003)
- 3.9 800MHz 40Watt Power Amplifier/Driver Shelf (50-078004)
- 3.10 VHF Simplex Shelf (50-078010/1)
- 3.11 VHF Simplex Shelf (50-078010/2)
- 3.12 VHF Duplex Shelves (50-078011/1-4)
- 3.13 VHF Air Interface Shelf (50-078012)
- 3.14 VHF Combiner Shelf (50-078013)
- 3.15 VHF PSU Shelf (50-078014)
- 3.16 VHF/800MHz Tx Multi-coupler (50-078015)
- 4. BAND SELECTIVE BI-DIRECTIONAL LINE AMPLIFIER
- 5. MASTER SITE UPGRADE
- 5.1 Master Site Upgrade Rack Assembly (50-078021)
- 5.1.1 Master Site Upgrade Rack Description
- 5.1.2 Master Site Upgrade Rack Electrical Specification
- 5.1.3 Master Site Upgrade Rack Mechanical Specification
- 5.1.6 Master Site Upgrade Rack Assembly (50-078021) Parts List
- 5.1.6a Upgrade Channel Module Shelf/Sub-Rack 50-078023 Parts List
- 5.1.7 Master Site Upgrade System Diagram, Drg. # 50-078081
- 5.2 Upgrade Channel Frequencies
- 5.3 Master Site HPA Interface Shelf (50-078005)
- 5.4 High Power Amplifier Shelf (50-146703)
- 5.1 Master Site Upgrade Rack Assembly (50-078021)
- 6. INSTALLATION
- 7. MAINTENANCE
- APPENDIX A
- APPENDIX B Initial Equipment Set-up Calculations
- APPENDIX C - BATTERY BACKUP
- C.1 GENERAL DESCRIPTION
- C.2. BATTERY BACKUP PHOTOGRAPHS
- C.3. SPECIFICATION
- C.4. GENERAL DRAWINGS
- C.5. BBU ALARMS & MONITORING SYSTEM
- C.6. INSTALLATION
- _
- C.7. MAINTENANCE
Mission Valley Radio Repeater Equipment + Upgrade
User/Maintenance Handbook
Handbook No. 50-078021HBKM Page 65 of 85
7. MAINTENANCE
7.1 Fault Finding
7.1.1 Quick Fault Checklist
All AFL equipment is individually tested to specification prior to despatch. Failure of this type of
equipment is not common. Experience has shown that a large number of fault conditions relating to
tunnel installations result from simple causes often occurring as result of transportation, unpacking
and installation. Below are listed some common problems which have resulted in poor performance or
an indicated non-functioning of the equipment.
Mains power not connected or not switched on.
External connectors not fitted or incorrectly fitted.
Internal connectors becoming loose due to transport vibration.
Wiring becoming detached as a result of heavy handling.
Input signals not present due to faults in the aerial and feeder system.
Base transmissions not present due to fault at the base station.
Modems fitted with incorrect software configuration.
Changes to channel frequencies and inhibiting channels.
Hand held radio equipment not set to repeater channels.
Hand held radio equipment not set to correct base station.
7.1.2 Fault Isolation
In the event that the performance of the system is suspect, a methodical and logical approach to the
problem will reveal the cause of the difficulty. The system consists of modules fitted in shelves within
an environmentally protected enclosure (rack).
Transmissions from the main base stations are passed though the system to the mobile radio
equipment; this could be a handheld radio or a transceiver in a vehicle. This path is referred to as the
downlink. The return signal path from the mobile radio equipment to the base station is referred to as
the uplink.
The first operation is to check the alarms of each of the active units and determine that the power
supplies to the equipment are connected and active.
This can be achieved remotely (via CEMS, the RS232 Coverage Enhancement Management System,
if fitted), or locally with the front panel LEDs. The green LED on the front panel should be illuminated,
while the red alarm indicator should be off. If an alarm is on, then that individual module must be
isolated and individually tested against the original test specification.
The individual amplifier or FO units within the shelf have a green LED showing through a hole in their
piggy-back alarm board, which is illuminated if the unit is working correctly. If a module is suspect,
check the DC power supply to the unit. If no other fault is apparent use a spectrum analyser to
measure the incoming signal level at the input and then after reconnecting the amplifier input,
measure the output level. Consult with the system diagram to determine the expected gain and
compare result.
In the event that there are no alarms on and all units appear to be functioning it will be necessary to
test the system in a systematic manner to confirm correct operation.