User`s guide

5
Installation
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 3ft.(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
7ft.(2m).
•More than 7ft. (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 10V, 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. 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
the Raymarine unit.
81304_1.book Page 5 Tuesday, July 31, 2007 2:44 PM