Raymarine AXIOM 2 XL - EMC Installation Guidelines; RF Interference; Compass Safe Distance

ForviewinganglesforyourproductrefertotheT
echnicalspecification.
6.8EMCinstallationguidelines
Raymarine®equipmentandaccessoriesconformtotheappropriate
ElectromagneticCompatibility(EMC)regulations,tominimizeelectromagnetic
interferencebetweenequipmentandminimizetheeffectsuchinterference
couldhaveontheperformanceofyoursystem.
CorrectinstallationisrequiredtoensurethatEMCperformanceisnot
compromised.
Note:
Inareasofe xtremeEMCinterference,someslightinterferencemaybe
noticedontheproduct.Wherethisoccurstheproductandthesourceof
theinterferenceshouldbeseparatedbyagreaterdistance.
ForoptimumEMCperformancewerecommendthatwhereverpossible:
•R aymarine®equipmentandcablesconnectedtoitare:
–Atleast1m(3.3ft)fromanyequipmenttransmittingorcablescarrying
radiosignalse.g.VHFradios,cablesandantennas.InthecaseofSSB
radios,thedistanceshouldbeincreasedto2m(6.6ft).
–Morethan2m(6.6ft)fromthepathofaradarbeam.Aradarbeam
cannormallybeassumedtospread20degreesaboveandbelowthe
radiatingelement.
•Theproductissuppliedfromaseparatebatteryfromthatusedforengine
start.Thisisimportanttopreventerraticbehavioranddatalosswhichcan
occuriftheenginestartdoesnothaveaseparatebattery.
•Raymarine®specifiedcablesareused.
•Cablesarenotcutorextended,unlessdoingsoisdetailedinthe
installationmanual.
Note:
Whereconstraintsontheinstallationpreventanyoftheabove
recommendations,alwaysensurethemaximumpossibleseparation
betweendifferentitemsofelectricalequipment,toprovidethebest
conditionsforEMCperformancethroughouttheinstallation.
RFinterference
Certainthird-partye
xternalelectricalequipmentcancauseRadioFrequency
(RF)interferencewithGNSS(GPS),AISorVHFdevices,iftheexternal
equipmentisnotadequatelyinsulatedandemitsexcessivelevelsof
electromagneticinterference(EMI).
SomecommonexamplesofsuchexternalequipmentincludeLEDlighting
(e.g.:navigationlights,searchlightsandfloodlights,interiorandexterior
lights)andterrestrialTVtuners.
Tominimizeinterferencefromsuchequipment:
•KeepitasfarawayfromGNSS(GPS),AISorVHFproductsandtheir
antennasaspossible.
•Ensurethatanypowercablesforexternalequipmentarenotentangled
withthepowerordatacablesforthesedevices.
•Considerfittingoneormorehighfrequencysuppressionferritestothe
EMI-emittingdevice.Theferrite(s)shouldberatedtobeeffectiveinthe
range100MHzto2.5GHz,andshouldbefittedtothepowercableand
anyothercablesexitingtheEMI-emittingdevice,ascloseaspossibleto
thepositionwherethecableexitsthedevice.
Compasssafedistance
Topreventpotentialinterferencewiththevessel'smagneticcompasses,
ensureanadequatedistanceismaintainedfromtheproduct.
Whenchoosingasuitablelocationfortheproductyoushouldaimtomaintain
themaximumpossibledistancefromanycompasses.Typicallythisdistance
shouldbeatleast1m(3.3ft)inalldirections.Howeverforsomesmaller
vesselsitmaynotbepossibletolocatetheproductthisfarawayfroma
compass.Inthissituation,whenchoosingtheinstallationlocationforyour
product,ensurethatthecompassisnotaffectedbytheproductwhenit
isinapoweredstate.
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