3
Installation
EMC installation guidelines
All Raymarine equipment and accessories are designed to best industry
standards for use in the recreational marine environment.
Their design and manufacture conforms to the appropriate Electromagnetic
Compatibility (EMC) standards, but correct installation is required to ensure
that performance is not compromised. Although every effort has been
made to ensure that they will perform under all conditions, it is important
to understand what factors could affect the operation of the product.
The guidelines given here describe the conditions for optimum EMC perfor-
mance, but it is recognized that it may not be possible to meet all of these
conditions in all situations. To ensure the best possible conditions for EMC
performance within the constraints imposed by any location, always ensure
the maximum separation possible between different items of electrical
equipment.
For optimum EMC performance, it is recommended that wherever possible:
• Raymarine equipment and cables connected to it are:
• At least 3 ft. (1m) from any equipment transmitting, or cables
carrying radio signals, e.g. VHF radios, cables and antennas. In the
case of Single Side Band (SSB) radios, the distance should be
increased to 7 ft. (2m).
• More than 7 ft. (2m) from the path of a radar beam. A radar beam
can normally be assumed to spread 20 degrees above and below
the radiating element.
• The equipment is supplied from a separate battery to that used for
engine start. Voltage drops below 10 V, and starter motor tran-
sients, can cause the equipment to reset. This will not damage the
equipment, but may cause the loss of some information and may
change the operating mode.
• Raymarine specified cables are used. Cutting and rejoining these
cables can compromise EMC performance and must be avoided unless
doing so is detailed in the installation manual.
• If a suppression ferrite is attached to a cable, this ferrite should not be
removed. If the ferrite needs to be removed during installation, it must
be reassembled in the same position.
Suppression Ferrites
The illustration shows typical
cable suppression ferrites used
with Raymarine equipment.
Always use the ferrites supplied
by Raymarine
Connections to other equipment
If your Raymarine equipment is to be connected to other equipment using
a cable not supplied by Raymarine, a suppression ferrite MUST always be
attached to the cable near to the Raymarine unit
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