Raymarine C140w - Page 160

4.Usetherotarycontroltoselecttheamountofgainyouwant,
betweenavalueof1to100.(Thedefaultvalueis75).
5.PresstheOKbutton.
Thenewvaluesremainsetevenwhenyouswitchoffthedisplay,
theyareappliedtoboththeactivewindowandanyothershnder
windowsdisplayingthesamefrequency.
Fishndercolorgain
Youcanadjustthecolorgaintochangethesignalstrengththreshold
forthestrongestcolorinyourshnderdisplay.
Colorgainsetsthelowerlimitforthestrongestechocolor.All
echoeswithasignalstrengthabovethisvaluearedisplayedinthe
strongestcolor.Thosewithaweakervaluearedividedequally
betweentheremainingcolors.
•Settingalowvalueproduceswidebandfortheweakestcolor,but
asmallsignalbandfortheothercolors.
•Settingahighvaluegivesawidebandforthestrongestcolor,but
asmallsignalbandfortheothercolors.
Therearetwocolorgainmodes:
•Auto.InAutomodethecolorgainsettingisautomatically
adjustedtosuitcurrentconditions.Anyadjustmentsmadeapply
toallshnderwindows.
•Manual.Youcansetthecolorgainmanually,betweenavalue
of1to100.
Adjustingtheshndercolorgain
Fromthemainshnderscreen:
1.PressthePRESENTATIONsoftkey.
2.PresstheGAINsoftkey.
3.PresstheCOLORGAINsoftkeyuntiltheMANoptionisselected.
4.Usetherotarycontroltoselecttheamountofcolorgainyou
want.
5.PresstheOKbutton.
Thenewvaluesremainsetevenwhenyouswitchoffthedisplay
andareappliedtoallshnderwindows.
Fishndercolorthreshold
Thecolorthresholdsettingdeterminestherangeofcolorsusedon
screen.Theeffectofthisistosetacolorthresholdbelowwhich
targetsarenotshown.Forexamplealowsettingwouldresultin
onlythestrongest(orangeandred)targetsbeingdisplayed.
Adjustingtheshndercolorthreshold
Fromthemainshnderscreen:
1.PressthePRESENTATIONsoftkey.
2.PresstheGAINsoftkey.
3.PresstheCOLORTHRESHOLDsoftkey.
4.Usetherotarycontrollertoselecttherequiredcolorthreshold.
5.PresstheOKbutton.
FishnderTVG(TimeVariedGain)
TheTimeVariedGain(TVG)functionreducestheamountofclutter
intheshnderdisplaybyvaryingthegainthroughoutthecolumnof
water.Thisfunctionisusefulforreducingtheappearanceof‘noise’.
•IncreasingtheTVGvalueincreasesthemaximumdepthtowhich
TVGisapplied.Ahighvaluedecreasesthegaininshallowwater
sothatonlythestrongestechoesaredisplayed.
•DecreasingtheTVGvaluereducesthemaximumdepth.Alow
TVGvaluehaslittleeffectongaininshallowwater.
160C-SeriesWidescreenuserreference