
SimradSH90
TrueRange
TheTrueRangebuttonislocatedintheCosmeticsmenu,whichin
turnisopenedfromtheDisplaymenu.RefertoSlantRangeon
page159forfurtherinformation.
Relatedtopics
•Cosmeticsmenuonpage103
•SlantRangeonpage159
TVG
Dialogdescription
TheTVG(TimeV ariableGain)parameterdialogopenswhen
youclicktheTVGbuttonintheHorizontal,VerticalandVertical
180menus.
TheTVG(TimeV ariableGain)controlsthegaininthesignal
amplier.Thegainisweakestjustaftertheping,andincreases
inaccordancewithtime(andthereforerange).TheTVGcanbe
selectedwithsixdifferentcurveslopes,eachhavingdifferent
gainregulations.TheAutooptionismarkedwithanasteriskto
indicatethetheoreticallycorrectsettingforthedifferentrange
settings.Withthissetting,thegainisadjustedinsuchwaythata
schoolofshwithacertainsizeanddensitywillbepresented
withapproximatelythesamestrengthonthescreeninany
positioninsidetheregulatedTVGrange.
TVGdialogoptions
•Off:ClicktoswitchtheTVGoff.
•[x]LOGR:ClicktoselectTVGfunction.
•Close:Clicktoclosetheparameterdialog.
•Help:Clicktoaccesstheon-linehelp.
Relatedtopics
•WhatisTVG?onpage178
•Horizontalmenuonpage93
•Verticalmenuonpage95
•Vertical180menuonpage96
172
323775/B
Comentarios a estos manuales