Simrad PI GEOMETRY - QUICK REFERENCE GUIDE REV B Manual de instalación Pagina 44

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SimradSH90
HowtoadjusttheAGC
TheAGC(AutomaticGainControl)adjuststhegaininthe
sonarspreampliercircuitry.Thisgaindependsonthestrength
oftheincomingechosignal.Theresultisaltereffect,reducing
noiseandreverberation.TheAGChasfourdifferentsettings.
1ClicktheHorizontalorVerticaltabtoopentherespective
menu.
2ClicktheAGCbuttontoadjusttheparameter.
ClicktheleftorrightsideoftheAGCbuttontodecrease
orincreasethesetting,orthemiddleofthebuttontoopen
theparameterdialog.
Formoreinformationaboutthisparameter,seeWhatisAGC?
onpage179.
HowtoadjusttheRCG
TheRCG(ReverberationControlledGain)regulatesthereceiver
gainindividuallyforeachofthereceivingbeams.Ifyouselect
asmallormediumvalue,echoesfrompropellers,surfaceand
bottomreverberationswillbesuppressed,whiletargetechoes
willremaininview.Ifyouselectastrongltersetting,itwill
removethebottom,whileechoesonthebottomwillbepresented.
Note
Scatteredshcanbeperceivedasreverberation.TheRCG
functionmustthereforebeusedwithcareifyouwishtond
scatteredschools.
1ClicktheHorizontalorVerticaltabtoopentherespective
menu.
2ClicktheRCGbuttontoadjusttheparameter.
ClicktheleftorrightsideoftheRCGbuttontodecrease
orincreasethesetting,orthemiddleofthebuttontoopen
theparameterdialog.
Formoreinformationaboutthisparameter,seeWhatisRCG?
onpage181.
42
323775/B
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