Suppression Ferrites; Connections To Other Equipment - Raymarine M81138 Installation Manual

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Installation manual (24 pages)

Installation manual (24 pages)

Table Of Contents

Table of Contents

81176_4.fm Page 7 Tuesday, April 18, 2006 9:26 AM

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 normally be

assumed to spread 20 degrees above and below the radiating element.

• The equipment is supplied from a separate battery from that used for engine start. Volt-

age 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 fer-

rite needs to be removed during installation it must be reassembled in the same position.