Simrad PI GEOMETRY - QUICK REFERENCE GUIDE REV B Manuel d'installation Page 99

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Menudescriptions
Gain:Thissettingcontrolstheamplicationofthereceived
echoesintheverticalpresentation.IfyouactivatetheAGC
(AutomaticGainControl)function,thisgainsettingis
inuenced.(►Gainonpage138)
PulseForm:Usethisfunctiontoselecttheformofthe
transmittedpulse.ThiscouldeitherbeFM(Frequency
modulation)withdifferentpulselengths,orCWwithdifferent
pulselengths.(►PulseFormonpage149)
TXPower:Thisbuttoncontrolsthetransmissionpower.
(►TXPoweronpage173)
TVG:TimeVariedGain.Thisfunctionwillautomatically
adjustthegaininthesonartocompensateforgeometric
spreadandabsorption.NotethattheTVGwillonlywork
withintherst1000meters.(►TVGonpage172)
AGC:AutomaticGainControl.Thisfunctionwill
automaticallyreducethegainifyouexperiencereverberation
andnoise,orincreaseitiftheconditionspermitit.Usingthe
AGCwillensurebestpossiblesignalprocessing.(►AGC
onpage122)
RCG:ReverberationControlledGain.Thisfunctionwill
automaticallyremoveunwantedreverberationfromthe
bottomorfromtheseasurface.Itmayhoweveralsoremove
scatteredsh.(►RCGonpage153)
PPFilter:ThePing-to-Pinglterwillonlyshowyouthe
echoesiftheyarestillpresentafterseveralconsecutivepings
(2,4or8).Thisfunctionwillprovideyouwithamorestable
echopresentation,asspuriousechoeswillbesuppressed.
(►PPFilteronpage148)
323775/B
97
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