2 Transducers for Fishfinders
EMCInstallationGuidelines
All Raymarine equipment and accessories are designed to thebest
industry standardsfor usein theleisuremarineenvironment.
Their design and manufacture conformsto the appropriate
Electromagnetic Compatibility (EMC) standards, but correct
installation is required to ensure that performance isnot
compromised. Although every efforthas been taken to ensure that
they willperform under all conditions,it isimportant to understand
what factors could affect the operation of the product.
TheguidelinesgivenheredescribetheconditionsforoptimumEMC
performance, butit is recognized that itmay not be possible to meet
all ofthese conditions in all situations. To ensurethe 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 optimumEMC performance, it is recommended that wherever
possible:
•Raymarine equipment and cables connected to it are:
•At least 1 m (3 ft) from any equipment transmitting or cables
carrying radio signals,e.g., VHF radios, cables andantennas.
In the case of SSB radios, the distanceshould be increased to
2 m (7 ft).
•More than 2 m (7 ft) from the path of a radar beam. A radar
beam can normally be assumed to spread 20 degrees above
andbelowtheradiatingelement.
•Theequipment issuppliedfroma separatebattery fromthatused
for engine start. Voltage drops below 10 V (20 V for 10 kW open
arrayscanners) inthe powersupplytoour products,and starter
motor transients, can cause the equipment to reset.This will not
damage theequipment,but may causethe loss of some informa-
tion and may change theoperating mode.
•Raymarine specified cables are used at all times. Cutting and
rejoiningthesecablescancompromiseEMCperformanceandso
must beavoided unless doing so is detailedin thedocumentation.
•Ifasuppressionferriteisattachedtoacable,thisferriteshouldnot
be removed.If the ferrite needs to beremoved during installation
it must be reassembled inthe sameposition.
