User manual

SimradES70
3Fortherelevanttransducerchannel,setPower[W]torequestedvalue.
→Outputpoweronpage293
4ClickOKtosavethecurrentsettingsandclosethedialog.
Adjustingthepulseduration(length)
Thisprocedureexplainshowtochangethepulselength(duration).
Tip
Thelengthofyourtransmittedpulseisveryimportanttohowyoucandetectsh.
•Ashortpulsedurationgivesyouaveryneverticalresolution.Thisallowsyouto
detectscatteredsh,andyoucanndthosethatmovenearthebottom.
•Alongpulsedurationthrowsalotmoreenergyintothewater,andthedigitallters
usedbythereceiverarenarrower.
TheselterswillreducetheES70'ssensitivityfornoise,butthelengthofthe
transmittedpulsewillgiveyoustrongerechoes.Withthelters,alongerpulse
durationwillprovidelongerrange,butreducedverticalresolution.
Procedure
1ClicktheOperationicon.
ThisiconislocatedundertheMainmenu.ItisusedtoopentheOperaiton
menu.
→Operationmenuonpage150
2ClickNormalOperationtoopentheNormalOperationdialog.
ThepurposeoftheNormalOperationdialogistoofferyouanoverviewofthe
currenttransceiverparameters,andtoprovideyouwiththeabilitytochangethem.
→NormalOperationonpage169
3Fortherelevanttransducerchannel,setPulseLengthtorequestedvalue.
Forgeneraluse,werecommendthatthepulsedurationissettoAuto.
→Pulsedurationonpage295
4ClickOKtosavethecurrentsettingsandclosethedialog.
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