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Important Information 7
EMC Conformance
All Raymarine equipment and accessories are designed to the 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 taken 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 electrical equipment.
For optimum EMC performance, it is recommended that wherever possible
Raymarine equipment and cables connected to it are:
At least 3 ft. (1 m) 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 7 ft. (2 m).
More than 7 ft. (2 m) from the path of a radar beam. A radar beam can nor-
mally be assumed to spread 20 degrees above and below the radiating ele-
ment.
Ensure that the equipment is supplied from a separate battery from 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.
Ensure that 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.
Suppression Ferrites
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. If a ferrite is packed separately in the carton, it must be installed as
soon as the cables are run.
87081.book Page 7 Wednesday, December 20, 2006 2:43 PM