Simrad ST90 - Defining the Middle Position of the Transducer

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4Denetherelevantparameters.
•TxInhibitHullUnitPosition:Withthetransducerfullyretracted,notransmissions
("pings")takeplace.Whenyoulowerthetransducerintothewater,youcanspecify
averticalpositionforwhenthetransmissionsstart.Whenthetransducerisretracted,
transmissionswillstopwhenthetransducerreachesthesameposition.
•TxInhibitPower:Thehighvoltagesuppliedtothetransceiverboardsismonitored.
Ifthisvoltagediffersfromthedenedtolerances,analarmmessagewillbeinitiated.
Youarenotpermittedtochangethelimitvalues.
•TxInhibitFirmware:Thermwareonthetransceiverboardsischeckedtoverify
compatibilitywiththeST90operationalsoftware.Thealarmisprovidedtomake
surethatthefunctionalityofferedbytheST90canbesupportedbythetransceiver
boards.Amismatchwilltriggera"rmwarenotaccepted"alarm.
•TxInhibitOperationMode:Thisfeatureactivatesthesystemprotectiontomake
surethattheST90doesnottransmit("ping")whenyouhavechosenReplayor
Inactivemode.
•VesselSpeed:Whenthetransducerisfullylowered,thespeedofthevesselmust
notexceedthemaximumspeedpermittedbythehullunit.Thismaximumspeed
dependsonthesizeofthetransducer,themechanicalconstructionofthehullunit,
andhowfardownthetransducerhasbeenlowered.TheSystemProtectionpage
allowsyoutodenean"UpperWarningLimit"thatinitiatesthealarm.
5Atthebottomofthepage,selectApplytosaveyoursettings.
6ContinueyourworkintheInstallationdialogbox,orselectOKtocloseit.
Relatedtopics
Deningsettingsrelatedtouserpreferencesandindividualcustomizing,page97
Deningthemiddlepositionofthetransducer
ThehullunitprovidedwiththeST90isdesignedtolowerthetransducerdownbelowthe
ship’shullwhentheST90shallbeused.WhentheST90isswitchedoff,thetransduceris
hoistedforprotection.TheST90allowsyoutodeneamiddlepositionforthetransducer.
Prerequisites
Thephysicalpropertiesofthehullunitinstallationareknown.
Thecorrecttypeofhullunitisselected.
Thevesselisberthedoratsea.
Operatingprocedures