Xcom Installation; Wiring Harness; Aerials; Radio Frequency Hazard Information - XCOM 760 Installation And User Manual

XCOM Installation

The XCOM 760 VHF Transceiver installation is straight forward and requires no
special skills, the wiring harness does require someone with a reasonable
knowledge of wiring and the proper equipment for the installation, it's our
recommendation to purchase the pre-made wiring harness or have a local avionics
shop do the job for you.
Position the supplied template on your dash and when happy with the location drill
through the template in the marked positions, the main hole is 2 ¼ inches and the
4 securing holes are drilled 7/32 inch or (5.5mm), make sure the controls for the
radio are within sight and reach of the pilot when sitting and secured in the pilots
seat.
Please check behind your dash for other instruments and wiring which may be
damaged during drilling.
Bring the radio in from behind your dash and secure in place with the 4 mounting
screws (supplied) if you ever need replacement screws they are 6/32 UNC by 1/2
inch long.

Wiring Harness

The wiring harness is the one task that causes our customers the greatest
frustration when fitting a radio; unless you have experience in this area we would
strongly recommend getting a pre-made harness or having an avionics shop do the
harness for you.
If you decide to manufacture your own harness please refer to the web site for
techniques and wiring diagrams for ease of manufacture.
Some basic requirements are to use aircraft quality Tefzel wire, the power supply
should be 18 gauge wire and the other wires 22 gauge, the aerial wire should be
made from 50 ohm coaxial cable. All toggle switches and PTT switches should be
good quality and the headset and mike jacks should be aviation quality, if you need
jacks these can be purchased from our web site.

Aerials

Correct operation of the transceiver requires a properly installed aerial suitable for
the frequency range 118 to 137 MHz. On any new radio (or aerial) installation, the
VSWR of the aerial should be checked. The aerial VSWR should preferably be no
higher than 1.5:1. While no damage to the transceiver will occur with VSWR's of
3:1, some degradation in performance must be expected. There is more
information on aerials in the rear of this manual and on our website.

Radio Frequency Hazard Information

Regulations require a safe working distance between the Pilot, Co-Pilot, Passengers
or the general public of at least 100 cm (27 inches) to the aerial location. If an
antenna gain of greater than 5.6 dBi is to be used the manufacturer should be
contacted in order that a safe distance can be determined.
Release 1.2 © XCOM Avionics 2004 www.xcom760.com Page 9