Raytheon R80 Owner's Handbook Manual page 21

Chapter 8: Installation
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For optimum EMC performance, it is recommended that wherever possible:
• Raytheon equipment and cables connected to it are:
At least 1 m (3 ft) from any equipment transmitting or cables carrying radio
signals e.g. VHF radios, cables and antennas. In the case of SSB radios, the
distance should be increased to 2 m (7 ft).
More than 2 m (7 ft) from the path of a radar beam. A radar beam can
normally be assumed to spread
• The equipment should be supplied from a different battery than the one used
for engine start. Voltage drops below 10 V in the power supply to our
products can cause the equipment to reset. This will not damage the
equipment, but will cause the loss of some information and can change the
mode of operation.
• Raytheon specified cables should be used at all times. Cutting and rejoining
these cables can compromise EMC performance and so must be avoided
unless doing so is detailed in this handbook.
• If a suppression ferrite is attached to a cable, this ferrite should not be
removed. If the ferrite has to be removed during installation it must be
reassembled in the same position. The Pathfinder Radar Scanner Owner's
Handbook includes instructions on fitting a ferrite.
• Ensure you follow the installation instructions in Sections 8.6 to 8.8,
particular with reference to earthing details.
The following illustration shows the typical range of suppression ferrites fitted
to Raytheon equipment. Always use the ferrites specified by Raytheon.
If your Raytheon equipment is going to be connected to other equipment using a
cable not supplied by Raytheon, a suppression ferrite MUST always be fitted to
the cable close to the Raytheon unit.
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