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Operationalprocedures

Procedure

1ClicktheActiveicon.

ThisiconislocatedundertheMainmenu.ItisusedtoopentheActive

menu.

2ClickEchogramtoopentheEchogramdialogbox.

TheEchogramdialogboxallowsyoutosetuptheparameterscontrollingthe

echogrampresentation.Thethreetabscontrolthehorizontallines,theechogram

typewithappliedTVG,andhowfasttheechogrammovesacrossthedisplay.

3OntheLinestab,observethatthebiomasscanbeenabledordisabled,andthatyou

candeneascaleforit.

4Makethenecessaryadjustments.

5ClickOKtosavethecurrentsettingsandclosethedialogbox.

Gainprocedures

TheseproceduresexplainhowyoucanadjustthegainintheEK15.Thiscontrols

how“powerful”theechoesareshownintheechopresentations.TheEK15usestwo

principlesforgain;signalamplicationandtimevariedgain(TVG).

Topics

•Adjustingthesignalgainonpage75

•AdjustingtheTVGgainontheActivemenuonpage76

Adjustingthesignalgain

Purpose

Thisprocedureexplainshowtochangethegain.

Description

Youcancomparethisgainsettingwiththevolumecontrolonyourcarradio.Whenthe

gainisincreased,theechoeswillappearstronger.Weakechoeswillbeeasiertosee.

However,sinceyoualsoincreasetheacousticnoiseinthereception,theEK15echo

presentationswillalsoshowthis.Toomuchgainwillthus“distort”thepresentation.

Bydefault,thegainsettingappliesonlytothecurrentlyselectedechogram(identied

withathickborder).Severalechogramtypesareavailable,theseareselectedinthe

Echogramdialogbox.Ifyouwishtoadjustthegainonallsimilarechogramsinyour

view,clicktoselectApplytoall.

Tip

DonotconfusethisGainfunctionwiththeTVGfunction.

351718/C

Simrad EK15 User Manual

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