User manual

SimradES70
•Monitoringthecurrentbiomassonpage77
•Annotationsonpage189
•TVGgainonpage291
•Activemenu;functionsanddialogsonpage219
Echogram;Echogramtab
TheEchogramtabinthe
Echogramdialogallowsyouto
selectwhichTVGcurvetouse
fortheechogram.Youcanchoose
fromseveralstandardcurves,
ormakeyourown.Thetabalso
allowsyoutochoosewhichtype
ofechogramyouwishtodisplay.
Important
Thechangesyoumakeherewill
bydefaultonlybeappliedto
thecurrentlyselected“active”
echogram(identiedwithathick
border).Ifyouwishtoapplythe
changestoalltheotherechograms
ofthesametype(forexampleall
bottomrelatedechograms),click
ApplyToAll.
Parameters
1TVG
ThiseldallowsyoutodenetheTimeVariableGain(TVG)curveappliedtothe
receivedechoes.
ThefollowingTVGsettingsareavailable:
aPower(NoTVG)
TVGgainisnotimplemented.Thissettingishardlyeverused.
bSchool(20logTVG)
Thisgainsettingoffersweakeramplicationclosetothebottom.Ithasbeen
designedtoprovidethebestechoesforschools.Thephysicalsizeofaschool
allowsyoutodetectitevenwithreducedgain.
cFish(40logTVG)
Thisgainsettingprovideslargeramplicationclosetothebottom.Ithasbeen
designedtoprovidethebestechoesfromsinglesh.
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