Simrad PI GEOMETRY - QUICK REFERENCE GUIDE REV B Manuel d'installation Page 180
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SimradSH90
BASICTHEORY
Thischapterexplainssomeofthebasictheoryrelatedtosettings,
errorsourcesandnoiseconditions.
Topics
•Settingsonpage178
•Noiseandreverberationonpage182
•Layersanddeectionsonpage185
Settings
Asonarwilltransmitasoundwaveintothewateraroundthe
vessel.Whenthissoundwavehitssh,bottom,orotherobjects
inthewater,apartofthesoundwillbereturnedasechoes.
Theseechoesarecollectedbythesonar,interpretedbythesonar
computers,andpresentedonthedisplay.
Themostimportantinterpretationishoweverlefttoyou,and
itmayoftenbedifculttodistinguishtheechoesandidentify
targets.Inordertohelpyouwiththis,theSH90sonarprovides
numerousadvancedlterandgainfunctions.Youcanalsotilt
thesonarbeamverticallyinordertoachieveanoptimumresult,
andyoucanusetheverticalslicetoview“across”intothewater.
Thischapterprovidesyouwithsomebasictheoryaboutsome
ofthekeysettingsavailable.
WhatisTVG?
TVGmeansTimeVariedGain.Asechoeswillbeweaker
whenthedistancetothemincrease,thesonarwillautomatically
amplifydistantechoesmorethancloseechoes.Inpractice,the
gainwillincreaseinproportionwithhowlongthesonarmust
waitfortheechoes.
Figure39TheTVGprinciple:Thegainattime(B)islargerthanattime(A)
A
(CD015005-003)
0
1
10 100
1000
B
C
178
323775/B
- Reference manual 1
- Documenthistory 4
- Copyright 4
- Disclaimer 4
- Tableofcontents 5
- 323775/B 10
- Referencemanual 11
- SimradSH90 12
- ABOUTTHISMANUAL 13
- SIMRADSH90 14
- Basicinformation 15
- Mainunits 16
- Sonarroomunits 17
- Systemdiagram 19
- Basicfunctionality 19
- Omnibeam 20
- Stabilisationsystem 21
- Reception 22
- Optionalfunctionality 23
- Peripheralequipment 24
- Supportinformation 25
- GETTINGSTARTED 26
- Poweron/offprocedures 27
- Howtoswitchoffthesonar 28
- Howtoperformbasicoperations 29
- Menubuttononemore 30
- Themenustructure 31
- Controlthecursor 32
- Menubuttons 32
- )D015010C 33
- Visualaids 34
- Cosmetics 35
- Selectonthe 37
- Selectbutton 37
- On-linehelp 38
- Helpbutton 39
- OPERATIONALPROCEDURES 40
- Menuprocedures 42
- Gainadjustmentprocedures 43
- HowtoadjusttheAGC 44
- HowtoadjusttheRCG 44
- Modeprocedures 45
- Howtosorttheoperationalmodes 46
- Markersandsymbolsprocedures 47
- Howtoaddan’Ownship’symbol 48
- Howtoadda’Gear’symbol 48
- Howtousethetrawlsymbol 49
- Storageprocedures 50
- Preparetherecordingparameters 51
- Recordasingleimage 51
- Recordmultipleimages 51
- Howtorecallsonarimages 52
- Howtokeepsonarimages 53
- Howtodeletesonarimages 53
- Howtorenamesonarimages 53
- Howtoprintsonarimages 54
- HowtoburnsonarimagesonaCD 54
- HowtocopysonarimagestoaUSB 55
- Procedure 56
- Howtoenablepositiontrack 57
- Howtoenabletargettrack 57
- Howtoaddatargettrackingline 58
- Usersettingprocedures 59
- Installationofoptions 60
- Addingoptionalfunctionality 61
- Softwareprocedures 62
- ChangeProductkey 66
- Operationalprocedures 69
- DISPLAYMODES 70
- Alternativemethod 71
- Bowup/Audio 73
- Bowup/Vertical 74
- Bowup/DualVertical 75
- Bowup/180°Vertical 76
- Truemotion 77
- Truemotion/Vertical 78
- Horizontalmenutotrydifferent 80
- 270°/Vertical 82
- OPERATINGPANEL 83
- ’Mainswitch’eld 84
- ’Symbol’eld 85
- Trawlsymbol 86
- ’Mode’eld 87
- ’Gain’eld 87
- (CD015022G) 88
- Trackball 89
- ’Train’eld 90
- (CD015022I) 91
- Autotilt 92
- ’Various’eld 93
- MENUDESCRIPTIONS 94
- Activemenus 95
- Verticalmenu 97
- Vertical180menu 98
- Displaymenu 100
- Setupmenu 101
- Objectsmenu 103
- Temporarymenus 104
- Cosmeticsmenu 105
- Store/Recallmenu 106
- SystemTestmenu 107
- Pop-upmenus 109
- Viewpop-upmenu 110
- CatchViewpop-upmenu 111
- Objectpop-upmenu 111
- Targetparameters 112
- Viewmenus 113
- VerticalViewmenu 114
- CatchViewmenu 115
- Messages 116
- Warningsmenu 117
- OperatorAlarmsmenu 118
- SystemAlarmsmenu 119
- Errorsmenu 120
- PARAMETERS 121
- Alphabeticallistofparameters 123
- Parameterdescriptions 124
- Dialogdescription 125
- Beamdialogoptions 125
- Bearing(Display) 126
- Bearing(Horizontal) 127
- Bearing(Vertical) 128
- ColourThreshold 128
- ColourThresholddialogoptions 129
- Relatedtopics 129
- Coloursdialogoptions 129
- DataSource 130
- Dateandtimeproperties 131
- DeadReckoning 131
- DefaultSetting 132
- DirectionIndicator 133
- DisplayGain 134
- EditGear(Purse) 135
- EditGear(Trawl) 136
- EditSchool 137
- ExternalSynchronisation 137
- FishAlarm 138
- FishAlarmdialogoptions 139
- Gaindialogoptions 140
- Geardialogoptions 141
- InspectObject 142
- Language 143
- MessageBar 144
- MiddlePos(ition) 145
- MiddlePos(ition)dialogoptions 146
- Modedialogoptions 146
- ModeButtons 147
- Movements 147
- NoiseFilter 148
- PanelBacklight 149
- PPFilter 150
- PulseForm 151
- AboutCW(ContinuousWave) 152
- AboutFM(FrequencyModulation) 152
- Rangedialogoptions 153
- Range(CatchView) 154
- RCGdialogoptions 155
- RecallMode 156
- RecallModedialogoptions 157
- Rulerdialogoptions 158
- Scaledialogoptions 158
- SchoolData 159
- ScienticOutput 159
- SearchSector 160
- SearchStep 161
- SlantRange 161
- (CD15023A) 162
- Stabilizer 163
- (CD015005K) 164
- StoreMode 166
- TargetTrack 167
- TargetTrackdialogoptions 168
- Tiltdialogoptions 168
- TrackHistory 170
- TrackWindow 171
- Transducer 171
- TRUOn/Off 172
- Advancedfeatures 173
- TrueRange 174
- TXPowerdialogoptions 175
- UserSetting 176
- WindDirection 177
- WindDirectiondialogoptions 178
- Zoomdialogoptions 178
- ZoomScale 179
- BASICTHEORY 180
- WhatisAGC? 181
- WhatisthePPFilter? 181
- Aboutpulseformandlength 181
- Aboutbeamwidths 182
- AboutGain 182
- (CD015005D) 183
- Noiseandreverberation 184
- (CD015005E) 185
- Blocking 186
- Checkthenoiseyourself! 186
- Layersanddeections 187
- Deections 188
- ON-BOARDMAINTENANCE 189
- Preventivemaintenanceschedule 190
- Whenindrydock 191
- Afterdrydocking 191
- Wheneverrequired 191
- Ambienttemperatureandhumidity 193
- TransceiverUnitcleaning 193
- TransceiverUnitfuses 193
- TransceiverUnitHeatExchanger 194
- PowerSupplyUnitmaintenance 195
- HullUnitmaintenance 196
- (CD015409-027) 199
- (CD015409-031) 200
- (CD015409-029) 201
- Finalizingmaintenancework 202
- K301)andlower 203
- S302topositionSTOP 203
- K301forhoistingandK302 203
- (CD015409-030) 204
- Cleaningthetransducer 206
- (CD015409-033) 207
- Airbleeding 208
- (CD015413C) 208
- ISBN-13:978-82-8066-124-1 222
- 2010KongsbergMaritimeAS 222
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