GPS Navigator J-NAV500
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3.3 EMC INSTALLATION & SERVICE GUIDELlNES
IMPORTANT NOTE
All JRC equipment and accessories are designed to the best industry standards for use in the marine
environment. Their design and manufacture conforms to the appropriate Electromagnetic Compatibil-
ity (EMC) standards, but good 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 impor-
tant to understand what factors could affect the operation of the product. Complete installation instruc-
tions are provided in Section 3 of this manual. Some preliminary suggestions are made below.
3.3.1 Installation
To avoid the risk of operating problems, all JRC equipment and cables connected to it should be:
• At least 1 m (3 feet) from any equipment transmitting or cables carrying radio signals e.g. VHF
transceivers, cables and antennas. In the case of SSB transceivers, the distance should be in-
creased 2m (7 ft).
• More than 2m (7 ft) from the path of a radar beam. A radar beam can normally be assumed to
spread 30 degrees above and below the radiating element.
• The equipment should be supplied from a battery other than that used to start the engine. Voltage
drops below 10.8 V in the power supply to our products can cause the equipment to reset. Al-
though this will not damage the equipment, it will cause loss of information and could change the
operating mode.
• Use JRC designated cables at all times. Cutting and rejoining these cables can compromise EMC
performance and should therefore be avoided unless specifically suggested in the installation
manual.
3.3.2 Check Before Going to Sea
• Always check the installation before going to sea to make sure that it is not affected by radio
transmission, engine starting, low battery voltage, or other problems.
• In some installations, it may not be possible to prevent the equipment from being affected by
external influences. In general this will not damage the equipment, but it can lead to it resetting, or
may momentarily result in faulty operation.
3.3.3 Servicing and Safety
• JRC equipment should be serviced only by authorized JRC service engineers. They will ensure
that service procedures and replacement parts used will not affect performance, There are no user
serviceable parts in any JRC product.
• The unit generates high voltages, so do not touch the cables or connectors when the power is on.
• Always report any EMC related problem to your nearest JRC dealer. We will use such information
to improve our quality standards.
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