User's Manual

INSTALLATION
FIXED STATIONS
380 ENVOY™ TRANSCEIVER REFERENCE MANUAL
Troubleshooting the fixed antenna
Common problems caused by incorrect installation are listed in Table 39.
WARNING: Before using the antenna system see the safety information provided.
WARNING: Poor installation can damage the antenna beyond repair.
Table 39: Possible faults in the fixed antenna installation
Symptom Possible cause Action
Antenna fails to tune
certain channels
The antenna and/or
tuner may not be
earthed correctly
Improve the earth connection.
Incorrect positioning
of the antenna
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.
Inadequate support
of the antenna
Ensure the antenna has adequate support so that it does
not sway or sag. If required, use antenna supports such
as guyed masts.
Poor radiation
efficiency
Poor installation Improve the earth connection.
Incorrect positioning
of the antenna
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.
The antenna and/or
tuner may not be
earthed correctly
Improve the earth connection.