Sidelobe suppression | Furuno FSV-84 specs

2. HORIZONTAL MODE

2.9.10Sidelobe suppression

Sidelobes are fairly emissions generated outside the main beam. The energy of the sidelobe is fairly weak but when the water is comparatively shallow and the bottom is rocky and hard, strong signals are detected by the sidelobe.

To reduce the effect of sidelobes, adjust SIDELOBE SUPPRESS from the H-SCAN SETTING menu. The setting range is –3 to +3 and the default setting is

0.The higher the setting the greater the sidelobe suppression. If there is a difference between the port and starboard side images, use a minus setting.

2-24

Image 58

Furuno FSV-84 manual Sidelobe suppression

Contents

Color Scanning Sonar 00015742711 Important Notices Safety Instructions Iii Replace anticorrosion zinc plate yearly This page intentionally left blank Table of Contents Safety Instructions Table of Contents Vii Viii NUMERIC/GRAPHIC Data Display MAINTENANCE, Troubleshooting Foreword FeaturesWord to the Owner of the Furuno FSV-84 Xii System with locally supplied monitor System ConfigurationBlackbox type configuration Xiii System with Furuno monitor Standard type configurationXiv Control Description Operational OverviewControl unit Turning the power off Turning the Power On/OffTurning the power on Power & Transducer controls Lowering the transducer Lowering, Raising the TransducerScreen Brilliance Raising the transducer Control Panel Dimmer Main menu defaultOthers menu Display Setting menu Dialog box for setting numeric value Mode selection menus Selecting a display modeDisplay Mode, Display Division Horizontal mode Sample display mode picturesHorizontal mode display H2 mode Horizontal 2 display Slant mode, combination display Slant mode, single displaySlant display single Slant display combination V1 and V2 displays V1 + ES1 or ES2 modeV1 and V2 modes V1 & ES1 ES2 display History display History modeES1 mode ES1 display ES2 display shown downward picture ES2 modeES1 + ES2 mode ES1 + ES2 display Adjusting the Gain Menu Overview Main menu Scan Setting menu Menu Title Echo sounder picture advance speed dialog box YES This page intentionally left blank Horizontal Mode Basic Operating Procedure Horizontal mode indications and marks Horizontal modeIndications and Marks Horizontal2 mode Dialog box for setting combination Landscape Left Inset Display Range Range concept Setting the tilt angle Tilt Angle Automatic tilt range narrow with Auto Tilt key Automatic tiltAutomatic tilt range wide with Auto Tilt key Auto tilt concept Case 2 Tilt angle 10 to Relation between bottom echo and tilt angleCase 1 Tilt angle 30 to Case 3 Tilt angle 0 to Tilt angle for surface fish Tilt angle Suitable tilt angle Tilt angle and beam coverage Measuring Range and Bearing to a Target Location of trackball data Eliminating Weak Echoes Principle of TVG Numeric data entry dialog box Adjust AGC Suppressing Bottom Tail Adjust 2nd AGC Decrease pulse length Adjust Near AGC Fish echo Identifying noise source Rejecting Sonar Interference and NoiseInterference rejector Shifting Tx frequency Changing Tx intervalHow TX Interval works Echo average Setting reference bearing for frequency changeNoise limiter Reverberation reduction Sidelobe suppression Adjusting Beamwidth Target Lock menu Tracking a Fish School target lockSelecting target lock type Target lock type dialog box Fish school tracking mode Target lock mark and target lock data Position tracking mode How position tracking mode target lock works Target Lock menu Selecting direction Detecting Fish Schools AurallyRange and audio bearing marks Selecting audio sector Alarm & Audio menuAudio sector dialog box Reverberation Automatic trainingIndications related to automatic training Presentation modes Presentation ModePresentation mode description Automatic return of own ship mark in true motion Display Setup menu How to select a presentation modePresentation mode dialog box Fish Alarm Fish alarm status dialog box How to set the fish alarm zone How to create desired alarm zone How to use offcenter Relocating Fish School for Easy Observation Comparing Fish School Concentration Estimate marks and their data Measuring Fish School Speed How to measure fish school speedEntering fish marks Deleting fish marks with the Delete Mark key Deleting fish marksFish mark Deleting fish marks through the menu Entering an event mark Event Mark, Own Ship Position MarkEvent mark data Deleting an event mark, own ship position mark Entering an own ship position markEvent mark description Deleting event marks, own ship position mark from the menu Inscribing the net course mark Net Course MarkNet course mark Observing Net Behavior Net behavior Storing the picture PRESET, Memory Card menuStoring, Recalling Picture Recalling stored picture Others Menu Displaying the Others menu Color Setting menu Others menu description Color response curve TVG setting window Bottom echoes Interpreting the Horizontal DisplayBottom echoes Fish schools Fish schools Sea surface reflections Sea surface reflectionsWake Wake Noise and interference Sidelobe echoes false echoesNoise and interference Vertical Mode Vertical mode concept Vertical Mode ConceptSetting the vertical display Overview Typical vertical display Vertical Mode Indications and MarksVertical 1 display indications and markers Solid Line Dashed Line Vertical bearing mark, tilt markVertical scan and horizontal scan ranges Trackball mark position reference mark Auto TrainAuto train Measuring the Range Measuring range with the trackball Select V-SCAN Setting and press the Menu key TVG setting dialog box Vertical Mode Suppressing Bottom Tail Adjust 2nd AGC Rejecting Interference and Noise Noise limiter Suppressing sidelobes Dialog box Vertical Expansion Display Vertical 1 expansion display Gain Control Wide Beamwidth Others menu description Setting window Display size Tracking Application to Bonito and Tuna FishingSearching Approaching Catching Catching Slant Mode Slant mode single display Sensor Slant mode combination display Dialog box for setting slant combination display H1 display Slant display NUMERIC/ Graphic Data Display Display Range Tilt Angle Automatic tilt Auto tilt concept Auto Training Eliminating Weak Echoes Scan Setting menu Suppressing Bottom Tail Decrease pulse length Adjust Near AGC Fish echo Rejecting Sonar Interference and Noise Changing Tx interval Noise limiter Adjusting Beamwidth Tracking a Fish School target lock Fish school tracking mode Position tracking mode Target Lock menu Detecting Fish Schools Aurally Selecting audio sector Offcenter Manual offcenter Automatic offcenter Fish Alarm How to set the fish alarm zone Numeric Measuring Fish School Speed Deleting fish marks Event Mark, Own Ship Position Mark Entering an own ship position mark Erase Marks menu Net Course Mark 21˚ Others sub menu Others menu description Scan Color TVG setting window Interpreting the Slant Display Surface fish school Bottom fish school Sea surface reflections False echo by sidelobe This page intentionally left blank Echo Sounder Mode Indications and markers on the echo sounder 1 display Typical Echo Sounder DisplaysEcho sounder 1 display Trackball mark position reference mark Echo sounder 2 net recorder or echo sounder display Downward-looking net recorder display Echo sounder + net recorder display Echo sounder combination mode ES1 + ES2Echo sounder combination display Upward + downward looking net recorder display ES2 mode Echo Sounder 2 display Upward + downward looking display Enabling an echo sounder mode Selecting an Echo Sounder ModeDisplay mode dialog box System menu setting and available displays Echo sounder mode configurations and menu setting Selecting Display Range ES1 SETTING, ES2 Setting menusRange and display shift concept Dialog box for setting numeric data Range dialog box ES1 Setting and ES2 Setting menus Picture Advance Speed Picture advance speed dialog box Measuring Depth, Distance Estimating fish concentration with estimate marks Fish histogram Fish histogram ES1 Setting menu ES1 Setting Menu OverviewES1 setting menu description ES2 Setting menu net recorder connected 10 ES2 Setting Menu OverviewES2 Setting menu description History Mode History mode concept Sample History Display How to interpret the history display How to Interpret, Set the History DisplayInterpreting the history display Setting the history marker Slant range and tilt angle Setting the width of the history marker Horizontal slice width dialog box Setting the picture advance mode Full Numeric/Graphic Data Display NUMERIC/GRAPHIC Data DisplayFull Numeric/graphic data display Abbreviated Numeric/Graphic Data Display Abbreviated Numeric/graphic display Numeric/graphic data description Numeric/Graphic Data DescriptionOn next Numeric/graphic data description con’t. from previous Deleting items from user menu Customizing the EquipmentUser Menu Main menu user menu Programming the user menu Message for registration of user menu item Executing a function Example default function programsFunction Keys F1-F6 Function dialog box for storing picture Function dialog box for recalling picture Dialog box for selection of presentation modeDialog box for adjustment of panel dimmer Function dialog box for erasing fish marks Dialog box for erase ship track Programming function keysConfirmation for registering function key Erasing programs Function key dialog box Selecting a user program User Prog ControlProgramming the User Prog control User program options This page intentionally left blank Others Menu Erase Marks menu Display Setting menu description Display Setting menuOpening the Display Setting menu Display Settng menu Tilt Opening the Alarm & Audio menu Alarm & Audio menuAlarm & Audio menu description Opening the PRESET, Memory Card menu PRESET, Memory Card menuPRESET, Memory Card menu description Initial Setting menu description Initial Setting menuOpening the Initial Setting menu Mark Display menu Range rings Heading markBearing scale Net movement plot Data on ship’s trackFish marks connected with line Mark Size menu Target lock markMark Size menu Others Menu Data Display menu Data Display menu Current VEC & Wind menu Current flow direction settingsCurrent VEC & Wind menu Xmtr Distance setting window NET Sonde Setting menuNET Sonde Settng menu NET Shoot Setting menu NET Shoot Setting menuDepth Display menu Stabilization menu Stabilization menuTest menu Initialization menu Initialization menuTime offset dialog box 10-1 Storing Image, ConfigurationMemory Card Operations Processor unit 10-2 Memory Card menu 10-3 Loading, Deleting FilesMemory Card menu, recall, delete dialog box opened Formatting Memory Cards 10-4 Cleaning the equipment MAINTENANCE, TroubleshootingPreventive Maintenance 11-1 Hull unit maintenance Hull Unit Maintenance11-2 Unit and fuse Fuse Replacement11-3 Unit Fuse rating Symptom Check, Remedy TroubleshootingTroubleshooting 11-4 11-5 Error messagesMessage Meaning, Remedy Power supply Transducer Error code Error CodesError messages con’t from previous 11-6 Test menu Status MessagesTests 11-7 11-8 Board testBoard test results 11-9 Interpreting the board test results Panel test Panel test11-10 Trackball check Lever check 11-11 Test patternTest patterns 11-12 Rx test For service technicianNoise test For service technician Rx test sequence, Rx test message 11-13 Raising the Transducer from the Hull UnitRaising the transducer automatically Raise/lower control box, cover removed Raising the transducer manually 11-14 Menu Tree AP-1 AP-2 Appendix AP-3 Xmtr Distance AP-4 Tilt Interlock OFF, on Specifications of the Color Scanning Sonar FSV-84 Transceiver Unit Power Supply Index IN-1 IN-2 Indications IN-3 OFF Center key Offcentering Vertical mode Smoothing IN-4 IN-5 V1/S, V2 keys