User Manual
Table Of Contents
- 1. INTRODUCTION
- Scope and Purpose of Document
- Limitation of Liability Notice
- 2. SAFETY CONSIDERATIONS
- 3. EQUIPMENT OVERVIEW
- 4. SUB-UNIT MODULES
- 4.1 Bandpass Filter (02-010201)
- 4.2 Two-Way Splitter (07-002503)
- 4.3 0.25Watt 0- -30dB Switched Attenuator (10-000703)
- 4.4 11-007302 & 11-007402 Low Noise Amplifiers
- 4.4.1 Description
- 4.4.2 Technical Specification (11-007302)
- 4.4.3 Technical Specification (11-007402)
- 4.4.4 LNA ‘D’ Connector Pin-out details
- 4.4.5 Drg. # 11-007302, LNA Assembly With Alarm Relay
- 4.4.6 Drg. # 11-007370, LNA RF Circuit Diagram
- 4.4.7 Drg. # 11-007371, LNA DC Wiring Diagram
- 4.4.8 Drg. # 11-003971, LNA DC Circuit Diagram
- 4.4.9 Drg. # 11-007402, LNA Assembly With Alarm Relay
- 4.4.10 Drg. # 11-007470, LNA RF Circuit Diagram
- 4.5 12-021601 5Watt Medium Power Tetra Amplifier
- 4.6 12-022101 10Watt Power Tetra Amplifier
- 4.7 8A Mains Filter Assembly (13-003301)
- 4.8 Channel Control Module (17-002101)
- 4.9 Channel Selective Module (17-003007)
- 4.10 12V Single Relay Board (80-008901)
- 4.11 12V Switch-Mode PSU (96-300052)
- 5. INSTALLATION
- 6. FAULT FINDING & MAINTENANCE
- 6.1 General Fault Finding Procedures
- 6.2 Downlink
- 6.3 Uplink
- 6.4 Fault repair
- 6.5 Checking service
- 6.6 Service Support
- 6.7 Tools & Test Equipment
- 6.8 General Maintenance Procedures
- _
- 6.9 Module Removal (LNA’s, 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
Two Channel UHF Cell Enhancer
User Handbook
Handbook Number: 50-187601HBKM Page: 10 of 51
3.1 Description
The cell enhancer is constructed within an environmentally protected case which may be either free-
standing or (usually) permanently secured to a vertical wall.
The unit is an on-frequency, two-way repeater which draws its downlink input from an off-air antenna,
amplifies the signal through a pair of channel selective modules, (the modules ‘pick-out’ the channel
from within the frequency band, subjecting it to automatic gain, phase-locked tuning using a set of 16
DIP switches to digitally control the channel frequency). Downlink output to the mobile antenna is
approximately 10Watts and the uplink output to the base antenna is approximately 5Watts.
The whole system is powered from a mains-driven PSU module which supplies 12V DC from 115V
AC mains at a power not exceeding 150Watts. No battery backup is fitted to this system.
All active devices have in-built alarm circuitry which terminates as volt-free, relay contact pairs on an
internal connector. These pairs may be wired in series to produce a single pair that is the ‘sum’ of all
the alarmed devices in the system.
3.2 Technical Specification
PARAMETER SPECIFICATION
451.5-453.0MHz (Downlink)
Frequency range:
456.5-458.0MHz (Uplink)
Bandwidth: 1.5MHz
Passband ripple: ±1.5dB
Gain: >90dB (typical)
Gain Adjustment: 0 - 30dB (in 2dB steps)
Uplink Power: >5Watts
Downlink Power: >10Watts
54dBm (downlink)
Third order intercept point(OIP3):
50dBm (uplink)
40.3dBm (downlink)
1dB compression point:
37.5dBm (uplink)
Downlink: -21dBm
AGC:
Uplink: -20dBm
Downlink: 10dB (downlink)
Chan module gain:
Uplink: 15dB (uplink)
Noise Figure: <6dB
VSWR: better than 1.5:1
RF Connectors: N type, female
operational:
-10°C to +60°C
Temperature range:
storage:
-40°C to +70°C
1 Amplifiers Alarms Fitted:
(volt-free contacts/TTL)
2 PSU