Table 38: Possible Faults In The Fixed Antenna Installation - Codan Envoy Reference Manual

I
NSTALLATION
F
IXED STATIONS
Troubleshooting the fixed antenna
Common problems caused by incorrect installation are listed in
WARNING: Before using the antenna system see the safety information provided.
WARNING: Poor installation can damage the antenna beyond repair.

Table 38: Possible faults in the fixed antenna installation

Symptom
Antenna fails to tune
certain channels
Poor radiation
efficiency
418
Possible cause
The antenna and/or tuner
may not be earthed
correctly
Incorrect positioning of
the antenna
Inadequate support of the
antenna
Poor installation
Incorrect positioning of
the antenna
The antenna and/or tuner
may not be earthed
correctly
Action
Improve the earth connection.
Check that the position of the antenna corresponds
to the desired direction of communication. The
antenna must also be positioned away from trees,
buildings etc, which provide a shielding effect and
diminish the efficiency of the antenna.
With an SWR meter in place, alter the position of
the antenna to achieve best forward-radiated
power.
Ensure the antenna has adequate support so that it
does not sway or sag. If required, use antenna
supports such as guyed masts.
Improve the earth connection.
Check that the position of the antenna corresponds
to the desired direction of communication. The
antenna must also be positioned away from trees,
buildings etc, which provide a shielding effect and
diminish the efficiency of the antenna.
With an SWR meter in place, alter the position of
the antenna to achieve best forward-radiated
power.
If the problem persists, check the antenna length
(for long wire antennas), the length of the antenna
feed wire, and the conductivity of the earthing
system. Alter these slightly in an attempt to
achieve better tuning.
Check that the problem does not move to other
channels.
Improve the earth connection.
E ™ T
NVOY
Table 38.
R M
RANSCEIVER EFERENCE ANUAL