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 15 Channel Repeater 50-157401 Major Sub-Components
- 4.1. Downlink Splitter/Combiner 50-157402
- 4.2. Channel Module Shelf 50-157403 (6 channels)
- 4.3. Channel Module Shelf 50-157404 (3 channels)
- 4.4. 100W Power Amplifier 80-245103
- 4.5. Uplink Triplexer Shelves 50-157405
- 4.7. Uplink 5W Amplifier Shelf 50-157406
- 4.7.2. Uplink 5W Amplifier Shelf 50-157406 Specification
- PARAMETER
- SPECIFICATION
- 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 (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
Axell Wireless Limited
Technical Literature
15 Channel UHF Hybrid Select Repeater
Document Number 50-157401HBK Issue No. 1 Date 26/03/2008 Page 43 of 50
6.3 Uplink
Testing the uplink involves a similar procedure to the downlink except that the frequencies used are
those transmitted by the mobile equipment.
6.4 Fault repair
Once a faulty component has been identified, a decision must be made on the appropriate course to
carry out a repair. A competent engineer can quickly remedy typical faults such as faulty connections
or cables. The exceptions to this are cable assemblies connecting bandpass filter assemblies that are
manufactured to critical lengths to maintain a 50-ohm system. Care should be taken when replacing
cables or connectors to ensure that items are of the correct specification. The repair of component
modules such as amplifiers and bandpass filters will not usually be possible in the field, as they
frequently require specialist knowledge and test equipment to ensure correct operation. It is
recommended that items of this type are replaced with a spare unit and the faulty unit returned to
AWL for repair.
6.5 Checking service
Following the repair of any part of the system it is recommended that a full end-to-end test is carried
out in accordance with the test specification and that the coverage is checked by survey.
It is important to bear in mind that the system includes a radiating cable network and base stations
that may be faulty or may have been damaged.
6.6 Service Support
Advice and assistance with maintaining and servicing this system are available by contacting Axell
Wireless Ltd.
6.7 Tools & Test Equipment
The minimum tools and test equipment needed to successfully service this Axell product are as
follows:-
Spectrum analyser 100kHz to 2GHz (Dynamic range = 90dB).
Signal Generator 30MHz to 2GHz (-120dBm to 0dBm o/p level).
Attenuator 20dB, 10W, DC-2GHz, (N male – N female).
Test Antenna Yagi or dipole for operating frequency.
Digital multi-meter Universal Volt-Ohm-Amp meter.
Test cable x 2 N male – N male, 2M long RG214.
Test cable x 2 SMA male – N male, 1m long RG223.
Hand tools Philips #1&2 tip screwdriver.
3mm flat bladed screwdriver.
SMA spanner and torque setter.