Raymarine L1250D, Owner'S Handbook Manual

Page: 34 / 246

2-2 HD Series Fishfinders
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Planning the Installation
Before you install your system, plan the installation, considering:
• Correct transducer for your application. See document number 81196,
Transducers for Fishfinders Owner’s Handbook .
• Location of the display and sounder units, as described in Section 2.3
• Cable Runs, including cables for an integrated system (to provide heading
and position data, etc.), as described in
Section 2.4 .
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 (for example: 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 radiat-
ing 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 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.
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