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Finaltestsandmeasurements

Receivingvoltageresponse(VR)

measurements

Inordertomeasurethereceivingvoltageresponse,usethetesthydrophoneinthesame

positionasfortheprevioussourcelevelmeasurements.

Note

Ifthistestisdoneinshallowwaters,orwithothershipsorharbourstructuresinthenear

vicinity,youmaynditdifculttoachievecorrectreadings.Thisisbecausethesignals

fromthehydrophonearereectedfromtheseabedandtheneighbouringsurfaces.

Topics

•Preparationsonpage203

•Sonarparametersonpage203

•Testprocedureonpage204

•Finalizingtheprocedureonpage205

•Receivingvoltageresponsetestresultsonpage205

Preparations

Usethesametestsetupasforsourcelevelmeasurements.

1Thefollowingtestequipmentisused.

aTesthydrophone

Observethetesthydrophonedatacollectedduringthesourceleveltest.

bOscilloscope

cSignalgenerator

dScienticcalculator

Relatedtopics

•Testsetuponpage200

•Preparationsandtesthydrophonedataonpage199

Sonarparameters

Formeasurementofthereceivingvoltageresponse,usethefollowingmenusettings.

Thiscommandsequencewillautomaticallysetupallthesonarparametersrequiredtodo

thesourcelevelmeasurements.

1ClicktheTestCongbutton.

ObservethattheTestCongparameterdialogopensatthebottompartofthemenu

eld.

2SelectNoise&VR,andclickClose.

3OpentheHorizontalmenumenu.

aSetGainto30

381293/A

203

Simrad SU90 Installation Manual

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