Raymarine ALPHA, Installation Instructions Manual, Page: 24 / 72

– At least 1 m (3.3 ft) 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 2 m (6.6 ft).
– More than 2 m (6.6 ft) 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 product is supplied from a separate battery from that used for engine
start. This is important to prevent erratic behavior and data loss which can
occur if the engine start does not have a separate battery.
• Raymarine® specified cables are used.
• Cables are not cut or extended, unless doing so is detailed in the
installation manual.
Note:
Where constraints on the installation prevent any of the above
recommendations
, always ensure the maximum possible separation
between different items of electrical equipment, to provide the best
conditions for EMC performance throughout the installation.
6.6 Suppression ferrites
• Raymarine® cables may be pre-fitted or supplied with suppression ferrites.
These are important for correct EMC performance. If ferrites are supplied
separately to the cables (i.e. not pre-fitted), you must fit the supplied
ferrites, using the supplied instructions.
• If a ferrite has to be removed for any purpose (e.g. installation or
maintenance), it must be replaced in the original position before the
product is used.
• Use only ferrites of the correct type, supplied by Raymarine® or its
authorized dealers.
• Where an installation requires multiple ferrites to be added to a cable,
additional cable clips should be used to prevent stress on the connectors
due to the extra weight of the cable.
6.7 Suppression ferrite installation requirement
Raymarine® equipment and accessories conform to the appropriate
Electromagnetic Compatibility (EMC) regulations for use in the recreational
marine environment.
To ensure EMC Compliance,
the specified products must be fitted with the
supplied cable ferrite(s) , according to the instructions provided.
6.8 Suppression ferrite installation procedure
Follow the steps listed below to fit the supplied suppression ferrites to both
your 8-pin power cable’s red (positive) and black (negative) wires.
1. Feed the suppression ferrite approximately halfway down the length of
the red (positive) power cable wire.
2. Wrap the red (positive) power cable wire around the outside of the
suppression ferrite, and then feed the wire back through the ferrite so that
a loop is formed (as shown in the above illustration).
3. Secure the suppression ferrite in place using cable ties (not supplied),
directly at both ends.
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