Konsberg SIMRAD RS86, Руководство пользователя

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Instruction Manual
75
E04819 Issue 1.0
However, if the antenna is not vertical when transmitting, the
beam will be angled either too high or too low (Fig 7.17).
Fig 7.18 - Effect of heel on range of 1 m (3 ft) marine antenna
Fig 7.17 - Effect of heel on range of longer whip antenna
Here the wider beam of the shorter antenna will be more univer-
sally effective, although the signal will be weaker (Fig 7.18).
Therefore, for vessels with a large heel angle (small sailboats) a
short masthead antenna would be a better choice. Your local
agent should be able to provide specific advice on the appropri-
ate type of antenna.
Warning The antenna coaxial cable and any connectors
used must be rated at 50Ω. Under no circum-
stances should standard domestic TV cable and
connectors be used. Incorrectly rated cabling and
connectors could result in power not reaching
the antenna, but power could also be reflected
back into the radio, damaging it in the process.
The quality of any connections and integrity of the cable (with-
out 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.