Raymarine C Series Manuale di Installazione Pagina 17

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TheNMEA0183standardcarriessimilarinformationtoSeaTalk.
Howeverithastheimportantdifferencethatonecablewillonly
carryinformationinonedirection.ForthisreasonNMEA0183is
generallyusedtoconnectadatareceiverandatransmittertogether,
e.g.acompasssensortransmittingheadingtoaradardisplay.This
informationispassedin‘sentences’,eachofwhichhasathree
lettersentenceidentier.Itisthereforeimportantwhenchecking
compatibilitybetweenitemsthatthesamesentenceidentiersare
usedsomeexamplesofwhichare:
VTG-carriesCourseandSpeedOverGrounddata.
GLL-carrieslatitudeandlongitude.
DBT-carrieswaterdepth.
MWV-carriesrelativewindangleandwindspeeddata.
NMEAbaudrates
TheNMEA0183standardoperatesatanumberofdifferent
speeds,dependingupontheparticularrequirementorequipment
capabilities.Typicalexamplesare:
4800baudrate.Usedforgeneralpurposecommunications,
includingFastHeadingdata.
9600baudrate.UsedforNavtex.
38400baudrate.UsedforAISandotherhighspeedapplications.
2.4Packcontents
Unpackthedisplayunitcarefullytopreventdamage.Savethe
cartonandpackingincasetheunithastobereturnedforservice.
Planningtheinstallation
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