Simrad ES80 User Manual

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303
Noiseestimate
Foreverytransmission("ping")theES80measurestheecholevelsalongthe
chosenrange.Typically,thesemeasurementsaremadeeveryvemeters,evenfor
longranges.
Allechoesandnoiseinthewaterarerecorded.Thisincludesnoisegeneratedby
yourownvessel(electric,propellers,machineryetc),waterow,cavitationand
interference.Echoesfromshandotherspecies,aswellasfromthebottom,are
detectedandaddedtotheequations.
Bycomparingthesemeasurements,theES80calculatesanoiseestimate.
Tip
IfyousettheES80toPassivemode,allechoesfromthetransmissionsareremoved
fromtheequations.Thisgivesyouwithbetterinformationabouttheactualnoise.
IfyouwishtoswitchtoPassivemode,usetheNormalOperationdialogbox.The
NormalOperationdialogboxislocatedontheOperationmenu.
ThisinformationisalsoprovidedontheNoisepageintheBITE(Built-InTest
Equipment)dialogbox.Y ouopentheBITEdialogboxfromtheSetupmenu.
Equivalentambientnoise
ThenoiseestimateprovidedbytheES80includesallnoises.Thisincludesnoise
generatedbyyourownvessel,forexampleelectricnoise,propellers,machinery
andmechanicalvibrations.Bymeansofadditionalequations,thenoisevaluesare
compensatedforthebandwidth.Theequivalentambientnoisevalueattemptsto
presentthetotalnoiseasifitwasallfromambientsources.
ThisinformationisalsoprovidedontheNoisepageintheBITE(Built-InTest
Equipment)dialogbox.Y ouopentheBITEdialogboxfromtheSetupmenu.
Relatedtasks
SelectingNormalmode,page81
SelectingInactivemode,page82
SelectingReplaymode,page83
SelectingPassivetransceivermode,page159
Adjustingtheoutputpower,page160
Adjustingthepulseduration,page160
Deningthefrequencysweep(chirp)withineachtransmission,page161
DeningthepulsetypefortheES80transmissions,page162
Relatedfunctions
Operationfunction,page315
Menusystem

Simrad ES80 Specifications

General

Brand	Simrad
Model	ES80
Category	Marine Equipment
Language	English