Specifications

Menusystem
8Frequency
Thisparameterisusedtocontrolthetransmitterandreceiveroperationalfrequency.
9TVG
ThisparameterallowsyoutochoosetheTimeV ariableGainsettingintheSH90.
ThisfunctionwillautomaticallyadjustthegainintheSH90tocompensatefor
geometricspreadingandabsorption.
10AGC
ThisparametercontrolstheAutomaticGainControl.Thisfunctionwill
automaticallyreducethegainifyouexperiencereverberationandnoise,orincrease
itiftheconditionspermitit.
11RCG
ThisparameterisusedtocontroltheReverberationControlledGain.Thisfunction
willautomaticallyremoveunwantedreverberationfromthebottomorfromthesea
surface.Itmayhoweveralsoremovescatteredshfromthepresentation.
12PPFilter
Thisparametercontrolstheping-pinglter,whichreducestheamountofunwanted
noiseandechoesonthescreen.Thelterwillonlyshowyoutheechoesiftheyare
stillpresentafterseveralconsecutivepings(2,4or8).Thisfunctionwillprovide
youwithamorestableechopresentation,asspuriousechoeswillbesuppressed.
13Status
TheStatusparameterdialogcontainsatransducerpositionindicator,aswellas
presentationofcurrenttime,date,latitude,longitude,headingandspeed.Someof
thebuttonsallowyoutoadjusttheseparameters.
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