Raymarine St290 Specifications download pdf (Page 104)

6-1-6 Section 6: Installation

ST290 Instrument System Owner’s Handbook

1.2 Planning the 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 correctinstallation

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 possibleto 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 car-

rying 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, and starter motor transients,

can cause the equipment to reset. This will not damage the equip-

ment,but may causethe loss ofsome informationandmay changethe

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.

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Raymarine St290 Specifications Page 104