Specifications

SimradSH90
Procedure
1Operationalfrequency,horizontal
aClicktheHorizontaltabtoopenthemenu.
bOntheHorizontalmenu,clickFrequency.
Thisparameterisusedtocontrolthetransmitterandreceiveroperational
frequency.
cClickeithersideofthebuttontoleafthroughtheoptions,orthemiddleofthe
buttontoopentheparameterdialog.
2Operationalfrequency,vertical
aClicktheVerticaltabtoopenthemenu.
bOntheVerticalmenu,clickFrequency.
Thisparameterisusedtocontrolthetransmitterandreceiveroperational
frequency.
cClickeithersideofthebuttontoleafthroughtheoptions,orthemiddleofthe
buttontoopentheparameterdialog.
Savingthecurrentusersettings
Purpose
Alltheparametersettingsyoumakecanbesavedforlateruse.
Procedure
1ClicktheSetuptabtoopenthemenu.
2OntheSetupmenu,clickUsersettingbuttontoopentheparameterdialog.
Thisfunctionallowsyoutosavethecurrentusersettings(includingparameter
selections),andtoretrievepreviouslysavedfactoryorusersettings.
3ClicktheSavecurrentsettingbutton.
Thecurrentsettingissavedwiththedefaultidenticationname.
AdjustingtheAutomaticGainControl(AGC)
Purpose
TheAGC(AutomaticGainControl)functionadjuststhegainusinganimageprocessing
algorithm.Thisprocessingdependsonthestrengthoftheincomingechosignal.
Theimageisanalyzed,andreverberationandechoesareidentied.Basedonthe
analysis,weakechoesareamplied,whilestrongechoesarereduced.Theresultisa
“normalizing”effectthatreducesnoiseandreverberation.TheAGCisfunctionalupto
36
372739/D