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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 (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. Voltage drops
below 10 V in the power supply to our products, and starter motor transients, can cause the equip-
ment 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 ferrite needs
to be removed during installation it must be reassembled in the same position.
Suppression Ferrites
The following 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 the Raymarine unit.
EMC Conformance
Always check the installation before going to sea to make sure that it is not affected by radio
transmissions, engine starting etc.
LifeTag Installation & Commissioning Guide
D3548-6
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