Specifications

SimradSH90
Ping-to-pinglter
TheSimradSH90isequippedwithaping-to-pinglter(PPFilter)toprovideaclean
andsteadypresentationbyreducingtheinterferenceandnoise.Thisltercomparesthe
echoesfromaselectedamountoftransmissions(pings),andanechohastobepresentin
theselectedamountofpingsinordertobepresentedonthedisplay.
Notethatinroughseas,whenthebeameasilycanmissthetargetinseveralpings,the
PPFiltermustbeusedwithcare.
Relatedtopics
•WhatisthePPFilter?onpage103
TVG(TimeVariableGain)
TheTimeV ariableGain(TVG)functioncontrolsthegainofthereceiversothataschool
withagivensizeanddensityispresentedwithapproximatelythesamestrengthon
thedisplay,insidetheregulatedTVGrange.Thiscanalsobeseenasalter,because
itreducesthenoiseclosetothevessel.
TheregulatedstrengthoftheTVGcanbeselectedinthemenu.
Relatedtopics
•AdjustingtheTimeV ariableGain(TVG)onpage38
•WhatisTVG?onpage102
Noiselter
Thenoiselterisdesignedtoremoveunwantedacousticnoisefromthesonarpicture.
Itwillreducetheinterferencefromotheracousticsystems(sonarsandechosounders)on
yourownvesselandfromothervesselsinthevicinity.Itwillalsosuppressthenoise
fromyourownpropellersandfromothersimilarnoisesources.
Supportinformation
IfyouneedtechnicalsupportforyourSimradSH90youmustcontactyourlocal
dealer,oroneofoursupportdepartments.Alistofallourdealersisprovidedon
http://www.simrad.com
.
372739/D
19