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Chapter 3: Installation
3.1 EMC Installation Guidelines
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. (1m) from any other equipment transmitting or carrying radio signals. In
the case of Single Side Band (SSB) radio, 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.
Suppression Ferrite
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.
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.
D7166_1
81219_5.book Page 41 Tuesday, July 6, 2010 10:19 AM
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