Specifications

SimradSH90
TransceiverUnit
TheSH90TransceiverUnitislocatedinthesonar
room,closetotheHullUnit.
Thetransceiverperformsthetransmissionand
receptioncontrolofthe480transmittersand480
receiverchannels.16identicaltransceiverboards
areused.Adedicatedpowersupplyisprovidedto
supplytherequiredDCvoltagestothetransceiver.
OneEthernetcableisusedforcommunicationwith
theProcessorUnitonthebridge,andasecondEthernet
cableisusedtocontrolthehullunit.ThethirdEthernet
cableconnectstothePowerSupplyUnit.
ThetransducercablesfromthehullunitarepluggedintothesidewalloftheTransceiver
Unitcabinetusingaspecialplug.
TheTransceiverUnitismountedonthebulkheadusingpowerfulshockabsorbers.The
connectorsforpowerandinterfacearelocatedatthebottomofthecabinet.
PowerSupplyUnit
AdedicatedPowerSupplyUnitisprovided.Itspurpose
istoprovidetheTransceiverUnitwithoperationalDC
power.
Caution
ThePowerSupplyUnitcontainshighvoltages.
DonotopenthecabinetdoorwhiletheSH90
isswitchedon.
HullUnit
TheHullUnitisdesignedtolowerthetransducer
1.0metersbelowtheship’shull.
Whenthesonarisswitchedon,presstheDownbuttonontheOperatingPaneltolower
thetransducerintothewater.Beforethesonarisswitchedoff,presstheUpbuttonon
theOperatingPaneltoretractthetransducerintotheinstallationtrunkforprotection.
Ifyouforgetthis,thetransducerishoistedautomaticallybeforethesonarisswitched
off.Itisalsohoistedautomaticallyifaseriousmalfunctionoccurstothecommunication
betweenthebridgeandthehullunit.
Thetransducercanalsobeloweredtoanyselectedmiddleposition.Incaseofvoltage
failure,thetransducercanberaisedorloweredmanuallybymeansofahandcrank.
ThesensorfortheelectronicstabilisationofthesonarbeamsishousedintheMotor
ControlUnit,whichismountedontheHullUnit.
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