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Installation 11
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 Elec-
tromagnetic Compatibility (EMC) standards, but correct
installation is required to ensure that performance is not compro-
mised. 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 performance, 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 elec-
trical equipment.
For optimum EMC performance, it is recommended that wher-
ever 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 transients, 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.
Connections to other equipment
If your Raymarine equipment is to be connected to other equip-
ment 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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