Installation manual

Operationalprocedures

4ClickClosetoexit.

Gainadjustmentprocedures

Thissectionexplainshowtocontrolthemanualandautomatic

gainsettingsontheSH90sonar.

Howtoadjustthegain

Youcanadjustthesonargainbymeansofthecontrolbuttons

ontheOperatingPanel,orbyusingtheGainbuttononthe

HorizontalandV erticalmenus.

1OntheOperatingPanel,locatetheGaineld.

2PresstheGainH+orGainH-buttonstoincreaseordecrease

thegaininthehorizontalpresentation.

Gain

H-

Gain

H+

3PresstheGainV+orGainV-buttonstoincreaseordecrease

thegainintheverticalpresentation.

Gain

V-

Gain

V+

Alternativemethod

1Inthesonar’smenusystem,clicktheGainbuttononthe

HorizontalorVerticalmenustoadjustthegain.

ClicktheleftorrightsideoftheGainbuttontodecreaseor

increasethegain,orthemiddleofthebuttontoopenthe

parameterdialog.

Formoreinformationaboutthisparameter,seeAboutGainon

page69.

HowtoadjusttheAGC

TheAGC(AutomaticGainControl)adjuststhegaininthe

sonar’spreampliercircuitry.Thisgaindependsonthestrength

oftheincomingechosignal.Theresultisaltereffect,reducing

noiseandreverberation.TheAGChasfourdifferentsettings.

1ClicktheHorizontalorVerticaltabtoopentherespective

menu.

2ClicktheAGCbuttontoadjusttheparameter.

323773/C