INSTALLATION
FIXED STATIONS
414 ENVOY™ TRANSCEIVER REFERENCE MANUAL
Noise reduction
In some cases, noise can be reduced by connecting the case of the transceiver directly
to earth. If an improvement is noticed, the existing functional RF earth may be
inadequate and need improvement.
Where the antenna and transceiver must be installed in close proximity, directly
earthing the transceiver may be necessary to eliminate RF feedback.
Troubleshooting the fixed installation
Common problems caused by incorrect installation are listed in Table 37.
Table 37: Possible faults in the fixed installation
Symptom Possible cause Action
Tuning fails Inadequate earthing Improve the earth of the transceiver by connecting
an earth strap (braid or copper strip) from the earth
screw of the transceiver to the earth point, keeping
the strap as short as possible.
Noise interference Noise interference by
other equipment
Identify the source of interference by switching off
other equipment. If possible, move the transceiver
and/or antenna away from the noise source.
Inadequate earthing of the
transceiver
Improve the earth of the transceiver by connecting
an earth strap (braid or copper strip) from the earth
screw of the transceiver to the earth point, keeping
the strap as short as possible.
No power The internal fuse of the
transceiver has blown
Replace the fuse.
Power not switched on Check that the AC mains supply and the
transceiver supply are both switched on.
Incorrect cable
connections
Check that the AC mains outlet, the transceiver
supply, and the transceiver are connected correctly.
Faulty cables and/or
connectors
Check that the cables and connectors between all
items of equipment are securely connected and not
damaged.
If the cables or connectors are faulty, contact your
Codan representative.
Battery not supplying the
correct voltage, or is in
poor condition
Check battery supply.
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