Codan 2110 series Reference Manual page 77

Table 18:
Symptoms
Noise interference
No power
Poor radiation
efficiency
SWR is bad
Manpack Transceiver 2110 series Reference Manual
Using the 9350 Automatic Tuning Whip Antenna with a 2110 Manpack Transceiver
Possible faults in the installation (cont.)
Possible causes
Noise interference by
other equipment
Inadequate earthing of
the transceiver
The internal fuse of
the transceiver has
blown
Poor connections
Battery not supplying
the correct voltage, or
is in poor condition
Faulty cables and/or
connectors
Poor installation
Incorrect positioning
of the antenna
The antenna may not
be earthed correctly
The SWR
measurement may
have been performed
at the transceiver unit
rather than at the
antenna
The antenna may not
be positioned
correctly
Faulty coaxial cable
or control cable
The antenna may not
be earthed correctly
Action
Identify the source of interference by switching off other
equipment. If possible, move the transceiver and/or
antenna away from the noise source.
Improve the earth of the transceiver by connecting an
earthing strap (braid or copper strip) from the earth screw
of the transceiver to the earthing point, keeping the strap
as short as possible.
Replace the fuse.
Check that the battery is connected correctly to the
transceiver.
Check battery supply (see
battery).
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.
Improve the earth connection (see
the antenna).
Check the position of the antenna, ensuring that the
vehicle body is not acting as a shield.
Improve the earth connection (see
the antenna).
Ensure the SWR meter is connected to the coaxial line at
the base of the antenna to achieve an accurate reading (see
page 63, Standing wave
Check the position of the antenna, ensuring that the
vehicle body is not acting as a shield. With an SWR meter
in place, alter the position of the antenna to achieve best
forward-radiated power (see
ratio).
Replace faulty cables.
Improve the earth connection (see
the antenna).
page 50, Checking the vehicle
page 48, Grounding
page 48, Grounding
ratio).
page 63, Standing wave
page 48, Grounding
61