User Manual
Table Of Contents
- 1. INTRODUCTION
- 1.1. Scope and Purpose of Document
- 1.2. Limitation of Liability Notice
- 2. SAFETY CONSIDERATIONS
- 3. EQUIPMENT OVERVIEW
- 4. UHF BANDSELECTIVE, BDA (55-199102) SUB MODULES
- 4.1. Bandpass Filter (02-010701)
- 4.2. 3dB Splitter/Combiner (05-002603)
- 4.3. Remote Attenuator Switch Assembly (‘10-001725’)
- 4.4. 5 Watt Tetra Amplifier (12-021601)
- 4.5. Linearised Power Amplifier (12-026901)
- _
- 4.6. Voltage Regulator Board 9.0V (13-001714)
- 4.7. DC/DC Converter, 24V in, 12V 8A out (13-003011)
- 4.8. Bi-Directional Amplifier (17-017301)
- 4.9. 12V (Single) Relay Board (80-008901)
- 4.10. 24V Switch-Mode PSU (96-300054)
- 5. INSTALLATION & COMMISIONING
- 6. FAULT FINDING / MAINTENANCE
- 6.1. Tools & Test Equipment
- 6.2. Basic Fault Finding
- 6.3. Quick Fault Checklist
- 6.4. Downlink
- 6.5. Uplink
- 6.6. Fault repair
- 6.7. Service Support
- 6.8. Care of Modules
- 6.9. Module Removal (LNAs, general procedure):
- 6.10. Module Replacement (general):
- 6.11. Power Amplifiers
- 6.12. Low Power Amplifier Replacement
- 6.13. Module Transportation:
- APPENDIX A
- _
- _
- APPENDIX B
UHF Bandselective BDA
90dB 40/5W
Document Number 55-199102HBKM Issue No. 1 Page 16 of 28
4.6. Voltage Regulator Board 9.0V (13-001714)
This unit it is used to derive a fixed voltage power supply rail from some higher voltage. In this
instance it is used to derive 9V from a 12V input.
The circuit is based upon a fixed voltage regulator, which is capable of supplying a maximum of 2.0 A
output current. Note that at full output current the dissipation of the device must remain in limits,
bearing in mind the voltage which is being dropped across it. The maximum allowable dissipation will
also depend on the efficiency of the heatsink on which the device is mounted.
13-001714 Specification
PARAMETER SPECIFICATION
Operating voltage: 12V DC
Output voltages: 9.0V
Output current: 2.0A (maximum per o/p)
Connections: Screw Terminal Block
operational: -10°C to +60°C Temperature
range:
storage: -20°C to +70°C
PCB Size: 30.5 x 38.1mm
4.7. DC/DC Converter, 24V in, 12V 8A out (13-003011)
The DC/DC converter fitted is an AFL assembled, high power PCB unit with an 8 amp at 12V output
capability. The circuit is basically an O.E.M semiconductor regulator (one side of which has a heatsink
mounting plate, usually bolted to the casing of a Cell Enhancer) and smoothing components built onto
a printed circuit board with screw block terminations.
In event of failure this unit should not be repaired, only replaced.
13-003011 Specification
PARAMETER SPECIFICATION
Input Voltage range: 18-28V DC
Output voltage: 12V±0.5V
Max. current load: 8.0Amps
operation: -10°C to +60°C Temperature
range:
storage: -20°C to +70°C
Size(PCB): 190 x 63mm
Weight (Loaded PCB): 291gms