Simrad SU90 - Receiving Voltage Response (VR) Measurements; Preparations; Sonar Parameters

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