Humminbird 937C DF COMBO manual KHZ Sensitivity, Depth Lines, Surface Clutter, Noise Filter

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50 KHZ SENSITIVITY

(Advanced, 937c DF Combo and 931c DF models only)

50 kHz Sensitivity changes the sensitivity of the 50 kHz beam. Increasing the 50 kHz Sensitivity will display additional weak returns and decreasing the 50 kHz Sensitivity will display fewer weak returns. The 50 kHz Sensitivity menu choice is only available when User Mode is set to Advanced (see Setup Menu Tab: User Mode).

To set the 50 kHz Sensitivity:

1.Make sure you are in Advanced User Mode, then highlight 50 kHz Sensitivity on the Sonar main menu.

2.Use the LEFT or RIGHT 4-WAY Cursor Control keys to set the 50 kHz Sensitivity. (-10 to +10, Default = 0)

DEPTH LINES

(Advanced)

Depth Lines divide the display into four equal sections that are separated by three horizontal depth lines. The depth of each line is displayed along the depth scale. You can either turn Depth Lines On or Off. The Depth Lines menu choice is available when User Mode is set to Advanced (see Setup Menu Tab: User Mode).

To change the Depth Lines setting:

1. Make sure you are in Advanced User Mode, then highlight Depth Lines on the Sonar main menu.

2. Use the LEFT or RIGHT 4-WAY Cursor Control

Depth Lineskeys to turn the Depth Lines setting On or Off.

(Off, On, Default = On)

SURFACE CLUTTER

(Advanced)

Surface Clutter adjusts the filter that removes surface clutter noise caused by algae and aeration. The lower the setting, the less surface clutter will be displayed. The Surface Clutter menu choice is available when User Mode is set to Advanced (see Setup Menu Tab: User Mode).

 

To change the Surface Clutter setting:

 

1. Make sure you are in Advanced User Mode, then

 

highlight Surface Clutter on the Sonar main menu.

 

2. Use the LEFT or RIGHT 4-WAY Cursor Control

 

keys to change the Surface Clutter setting. (Low =

Surface Clutter

1 to High = 10, Default = 5)

NOISE FILTER

(Advanced)

Noise Filter adjusts the sonar Noise Filter to limit interference on the display from sources such as your boat engine, turbulence, or other sonar devices. The Noise Filter menu choice is available when User Mode is set to Advanced (see Setup Menu Tab: User Mode).

NOTE: The Off setting removes all filtering; Low, Medium and High settings add progressive filtering of the sonar returns. In some deep water situations, the High setting may actually make it harder for the control head to find the bottom.

To change the Noise Filter setting:

1.Make sure you are in Advanced User Mode, then highlight Noise Filter on the Sonar main menu.

2.Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the Noise Filter setting. (Off, Low, Medium, High, Default = Off)

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Contents Page Thank YOU Table of Contents Menu System Start-Up Options Menu Contact Humminbird Dualbeam Plus Sonar Series IntroductionHOW the 900 Series Works Single Beam SonarMulti-Media Card MMC/SD Slot MULTI-MEDIA Card MMC/SD Slot900 Series has a wide variety of configurations Accessory BUSInstallation Overview Accessory BusControl Head Installation Basic installation tasks that you must perform includeGimbal Mounting the Control Head Mounting Screws Washer Gimbal Mounting Bracket Cables Routed Near Mounting Bracket Back of Control Head IN-DASH Mounting the Control Head Temperature Plug Cable Connector Assembly to Back of Control HeadConnecting the Control Head Power Cable to the Boat Transducer InstallationRoute the transducer cable Transom Transducer InstallationTo determine transducer mounting location Determine transducer mounting locationMoves clockwise as the boat moves Corner of the templateNormal Cavitation Confirm that the pivot angle has not changedAttaching the Bracket To attach the pivot to the transducer Dual frequency unitForce is necessary to pivot the assembly Order to gain access to the mounting screws,To route the transom transducer cable all transducers Inside the Hull Transducer Installation Trial installationDetermine the transducer mounting location Inside the Hull Permanently mount the transducerRoute the cable Make sure the position of the transducer is markedTest and Finish the Transducer Installation Trolling Motor Transducer InstallationFollow these steps to stem mount the GPS receiver Stem Mounting with AN Existing 1 14 Thread StemIf you have… Then use Hand-tighten onlyTo the cable as shown Access Under Mounting LocationFinish Routing the Cable and Check GPS Receiver Operation No Access Under Mounting LocationSpeed Accessory Installation Install the Speed accessoryHand tighten only Cleaning the Speed accessory Routing the speed cable to the control headRotating Retaining Axial Clip to Remove Paddlewheel To test the installation Testing the System InstallationGetting Started Using Your 900 Series Powering UP the Control HeadSeries 937c DF Combo Title Screen Triplog WHAT’S on the Sonar DisplayUnderstanding Sonar History Real Time Sonar RTS WindowBottom Presentation POWER/LIGHT KEY KEY FunctionsMARK/GOTO key Info key Zoom +/- key Fishing requirements see View Menu Tab View KEYMenu KEY WAY Cursor Control KEYMARK/GOTO KEY View Preset KeysExit KEY Info KEYNavigation views ViewsViews and Readouts Sonar viewsSonar View Sonar Zoom ViewSonar View Split Sonar View Sonar Zoom ViewBird’s Eye View BIRD’S EYE ViewChart View with Active Cursor Chart/Bird’s Eye Combo View1112 Chart/Sonar Combo ViewChart View with Cursor Present Chart OrientationNavigation Waypoints, Routes and Tracks To save the marked position as a waypointNavigate to a Waypoint or Position Chart View with Target Chart View with GridADD a Waypoint Target or Trolling Grid Save or Clear a Current Track Press Menu Menu SystemSonar Tab, Normal Mode START-UP Options MenuStart-Up Options Menu Simulator Exit Normal operation by powering your 900 Series offNormal Operation SimulatorSelf Test Accessory TestSelf Test Accessory Test System StatusSonar X-PRESS Menu GPS Diagnostic ViewActive Side SensitivitySplit Position Lower Range To adjust the Upper RangeTo adjust the Lower Range Upper RangeSonar Colors Chart SpeedZoom Level Bottom LockNavigation X-Press Menu Highlight Split Position on the Navigation X-Press MenuSave Current Track Clear Current TrackSave Current Route Cancel Navigation Remove TargetRemove Grid Highlight Beam Select on the Sonar main menu Sonar Menu TABBeam Select To use Beam SelectTo turn Fish ID+ on or off To change the Fish ID Sensitivity settingFish ID+ Fish ID SensitivityTo change the Zoom Width To adjust the Bottom ViewBottom View Zoom WidthNoise Filter KHZ SensitivityDepth Lines Surface ClutterMAX Depth Water TypeTransducer Select Temperature Graph Color BARNavigation Menu TAB Tracks RoutesWaypoints Track MIN Distance North ReferenceTrolling Grid Rotation Trackpoint IntervalMAP Datum Export ALL NAV DataDelete ALL NAV Data To change the Map Borders setting Chart Menu TABChart Detail Level To change the Chart Detail Level settingLAT/LON Grid Spot SoundingsShaded Depth Alarms Menu TAB SET MAP OffsetClear MAP Offset Temp Alarm Depth AlarmFish ID Alarm LOW Battery AlarmTo change the Off Course Alarm setting OFF Course AlarmArrival Alarm Drift AlarmAlarm Tone To change the Alarm Tone settingHighlight Alarm Tone on the Alarms main menu Units Depth Setup Menu TABTo change the Units Depth setting To change the Units Temp settingLanguage User ModeUnits Distance Units SpeedTo Restore Defaults Triplog ResetRestore Defaults To Reset TriplogTo Select Readouts Default Sonar View Customized Sonar ViewLocal Time Zone Depth OffsetTemp Offset Speed CalibrationPosition Format Daylight Saving TimeTo turn Nmea Output on or off Nmea OutputSonar Following Nmea sentences are outputHighlight the View main menu tab Accessories Menu TABViews Menu TAB To Change the View Status of Any ViewTroubleshooting Series Doesn’t Power UpSeries Defaults to Simulator with a Transducer Attached Problem Possible Cause Display ProblemsBoat’s engine Finding the Cause of NoiseOther electronic devices Noise re-appearsHumminbird Service Policy Year Limited WarrantyReturning Your Unit for Service Series AccessoriesFor IN-WARRANTY service, complete the following steps Power Output SpecificationsAppendix a Place on bottom of hullAlign with transom Appendix B Contact Humminbird
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