User's Manual Part 2

Instruction manual
103
E04572
WARNING The antenna coaxial cable and any connectors used must be
rated at 50Ω. Under no circumstances should standard domes-
tic TV cable and connectors be used. Incorrectly rated cabling
and connectors could result in power not reaching the anten-
na, but power could also be reflected back into the radio,
damaging it in the process.
The quality of connections and integrity of the cable (without
breaks in the sheathing) will directly affect the performance of
the radio. Poor soldering or corrosion of the terminals can
impair performance. We recommend that screw or crimp termi-
nal type connectors are not used for any through-deck fittings –
a good quality waterproof solder terminal connector will be less
susceptible to poor connection due to corrosion of the contacts.
To ensure the best performance of the radio, the antenna cable
should be routed where it is least likely to interfere with, or
receive interference from, other electronic equipment, such as
echosounder transducer cables and high-current carrying
cables.
The antenna cable should terminate in a standard marine
PL259 plug fitting. Connect the antenna plug to the socket on
the top of the transceiver unit and screw the retaining collar
down (Fig 12.12).
Fig 12.11 - Effect of heel on range of 1m marine antenna
Fig 12.12 - VHF antenna connection
NOTE To avoid possible water damage to the radio, it is recommend-
ed that the antenna cable is looped to provide a drip path.