Simrad ST90 - Page 392

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•Transmissionsectors(Planeviews):
–Sectors:180,120,90,60or30°
•Pulseforms:
–CW(ContinuousWave)transmissions
–HFM(HyperbolicFrequencyModulation)transmissions(Thispulsetypeisalso
knownas"chirp".)
Bydefault,theST90hasContinuouswave(CW)andLinearFrequencyModulated
(LFM)transmissionmodesavailable.IfyourST90usesLPT32transceiverboards,you
canchangetheFMpulsetypefromLinearFrequencyModulated(LFM)toHyperbolic
FrequencyModulated(HFM).IfyourST90usesTRX32transceiverboards,only
Continuouswave(CW)andLinearFrequencyModulated(LFM)modesareavailable.
Toseewhichtypeoftransceiverboardsyouhave,seetheTransceiverpageintheBITE
dialogbox.
Reception
•Numberofreceiverchannels:384
•Gainfunctions:
–TVG(TimeVariedGain)
–AGC(AutomaticGainControl)
–RCG(ReverberationControlledGain)
•Digitallters:
–Ping-PingFilter
–NoiseFilter
–FMCorrelationlter
–BottomFilter
Echopresentations
•Displayresolution:1280x1024pixels(Minimum)
ThevisualqualityoftheST90presentationdependsonthequalityofyourgraphic
adapteranddisplay.Werecommendthatyouusealargedisplaywithresolution
1920x1080.
•Palettes:Achoiceofcolourpalettesisavailabletotambientlightconditions.
Beamwidths
•Userselectable:Auto,Narrow,NormalorWide
Stabilisation
•Rollstabilisation:±20degrees(Automatic)
SimradST90InstallationManual