Aerial Information - XCOM 760 Installation And User Manual

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Aerial Information

The XCOM 760 Transceiver is a state-of-the-art product and requires a quality and
matching aerial to provide owners with the best possible performance, clarity and
range. Some of the most important considerations are the location of the aerial and
the proper installation and cabling to the radio.
The most suitable location for the aerial is generally on top of the aircraft, in a
location which can provide the best unobstructed line-of-sight view of the
surrounding areas, preferably keep the aerial at least 1 meter away from other
aerials or the rudder.
Earthing the aerial to the aircraft ground is very important, if this is not done
properly performance will be well under your expectations and the actual
transmission patterns may be uneven and the voice possibly unreadable. On metal
aircraft with certain aerials it is necessary to remove the paint from the inner
surface to provide a good metal-to-metal contact of the aerial with the aircrafts
outer skin, on composite aircraft it is usually necessary to install a ground plane.
The ground plane on a composite aircraft should be at least 500mm diameter or
larger, the best performance will be gained with the biggest ground plane size. In
many composite aircraft it is possible to epoxy or RTV (silicone) a thin piece of
Release 1.2
volts. Press the F/CH to go on to the next option or
return to the main screen, the new values will be stored.
This sets the LOW point trip for the battery alert, rotate the
F/CH control to set the lower limit. The default is 11.5 volts.
Press the F/CH to go on to the next option or
the main screen, the new values will be stored.
This sets the stuck Mike, or Transmitter ON timer, the value
range is 10 to 90. The timer is normally set for 45 seconds,
and has a maximum timeout of 90 seconds. To set a value
simply rotate the F/CH control. Press the F/CH to go on to
the next option or
values will be stored.
This adjusts the microphone gain, and is provided to
accommodate different brands of microphone. The gain
control has a limited range in order to prevent users
inadvertently making the transceiver inoperable by
reducing the microphone gain to zero. Since the gain
control is before the modulation limiting circuitry it is not
possible to cause over modulation by increasing the gain
control to the maximum available in this mode. NOTE – the
factory default settings should be fine, we only recommend
using this option as a last resort. . Press the F/CH to go on
to the next option or
new values will be stored.
© XCOM Avionics 2004
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