Simrad ES80 - About Slope and Ramping

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Reducingrattlenoise
Ensurethatnopartsnearthetransducerscanrattleasaresultofwateroworvibrations.
Reducinginterference
Interferencefromthetransmissionpulsesfromotherhydroacousticinstrumentson
boardthevesselisdifculttoavoid.Theproblemmaybereducedbychoosingthe
workingfrequenciescarefullyandtosomeextentbyseparatingthedifferenttransducers.
Onvesselswithalargenumberofseparatehydroacousticsystemsinstalledandin
simultaneoususe,aseparatesynchronizingsystem(forexampletheK-Sync)should
beconsidered.
Reducingelectricalnoise
•PlacethetransducercablesinametalconduitfromthetransducertotheWideBand
Transceiver(WBT).TerminatetheconduitasclosetothetransducersandWideBand
Transceiver(WBT)aspossible.
•Makesurethatallunitsareproperlygrounded,asthisisimportanttoavoidelectrical
noise.
•Useshieldedcableswithcorrectgrounding.
•SeparateES80cablesfromothercableswithhighvoltages,largecurrentsor
transients.Placeallhighvoltagepowercablesinmetalconduits.
Relatedtopics
Acousticnoise,page462
BITE:Noisepage,page409
AboutSlopeandRamping
TheSlopevalueidentieshowfasttheoutputpowerineachtransmission("ping")goes
from0tomaximum.TheSlopeisalsocommonlyknownasRamping.
Thevalue(in%)indicatestheamountofthepulsedurationthatisspentduringthis
increase.Forexample,iftheSlopevalueis50%,itmeansthathalfthedurationofthe
"ping"isspentbuildingupthepowertomaximum.
IntheES80,thissettingisautomatic,whileonscienticechosoundersyoucanadjustit
manually.
Conceptdescriptions