Simrad ST90 - Adjusting the Intensity of the Echo Presentations

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3SelectAGC(AutomaticGainControl).
4Selectavaluefromtheoptionsprovided.
Thechoiceyoumakeisbydefaultonlyappliedtothecurrentlyselected(active)view.
Selectthemiddleofthebuttontoopenasmallmenuwiththeavailableoptions.Select
theleftsideofthebuttontoselecta"lower"'menuchoice.Selecttherightsideofthe
buttontoselecta"higher"'menuchoice.
Relatedtopics
Improvingtherecognitionofshandschoolsusingreceiverlters,page78
Adjustingtheintensityoftheechopresentations
TheeffectoftheGainadjustmentisminimizedifyouapplyRCG(ReverberationControlled
Gain)andAGC(AutomaticGainControl).TheDisplayGainisappliedtowardstheendof
theltersequenceintheST90.ThismeansthatyoucanuseDisplayGainifyouarenot
completelysatisedwiththeresultsoftheautomaticgainfunctionality.
Context
DisplayGaincontrolsthe"amount"ofechothatisdisplayed,inotherwordsthe"strength"or
"intensity"oftheechopresentation.Thefunctionthusincreasesordecreasesthepresentation
oftheechocolours.UsethisparametertogetherwithGaintoadjusttheST90sensitivity.
Forallpracticalpurposes,adjustingDisplayGainhasthesameeffectasadjustingGain.
AdjusttheDisplayGainsothatyoucanseethetargetswithouttoomuchnoiseand
reverberation.Thechosensettingisamatterofpersonalpreferences.
Procedure
1OpentheDisplaymenu.
2SelectDisplayGain.
3Adjustthesettingtotyourrequirements.
Tochangethesetting,movethecursortoeither
sideofthebutton.Selecttheleftsideofthe
buttontodecreasethevalue.Selecttherightsideofthebuttontoincreasethevalue.
Selectthemiddleofthebuttontoopenit.Ifyouhaveakeyboardconnectedtothe
ST90,youcantypetherequestedvalue.
SimradST90OperatorManual