User's Manual

800MHz & VHF Cell Enhancers
Maintenance Handbook
H/book Number:-50-078001HBKM
Issue No:-
A
Date:-02/09/2004
Page:-
82 of 88
6.1.4 RF Connections
All RF connections are made to the cable termination, located on the bulkhead at the rear of
the equipment at floor level (rack equipment). Care must be taken to ensure that the correct
connections are made with particular attention made to the base station Tx/Rx ports. In the
event that the base transmitter is connected to the Rx output of the rack, damage to the
equipment will be done if the base station transmitter is then keyed.
Again, ensure that connections are kept clean and are fully tightened.
6.2 Commissioning
Once all connections are made the equipment is ready for commissioning.
To commission the system the test equipment detailed in Section 7.2 will be required.
Using the system diagrams and the end-to-end test specification, the equipment should be
tested to ensure correct operation.
On initial power up the system alarm indicators on the front panels of the equipment should
be checked. A red LED illuminated indicates a fault in an amplifier module that must be
investigated before proceeding with the commissioning. A green LED on the door
illuminates, to indicate that the power supply is connected and active.
In the event that any part of the system does not function correctly as expected, check all
connections to ensure that they are to the correct port, that the interconnecting cables are not
faulty and that they are tightened. The majority of commissioning difficulties arise from
problems with the interconnecting cables and connectors.
6.3 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 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/ports 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 faults at the base station.
• Modems fitted with incorrect software configuration/and or PIN N’s.
• Changes to channel frequencies and inhibiting channels.
• Hand held radio equipment not correctly set to repeater channels.
• Hand held radio equipment not correctly set to base station.