Humminbird 343c manual To adjust the Upper Range, To adjust the Lower Range

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Upper Range

(Advanced: Sonar, Split Sonar, Big Digits and Circular Flasher Views only)

Upper Range sets the shallowest depth range that will be displayed on the Sonar, Split Sonar, Big Digits and Circular Flasher views. The Upper Range menu choice is available when User Mode is set to Advanced (see Setup Menu Tab: User Mode) and can only be accessed from the Sonar, Split Sonar, Big Digits and Circular Flasher views. Upper Range is often used with Lower Range.

For example, if you are only interested in the area between 20 and 50 feet deep, you should set the Upper Depth Range to 20 and the Lower Depth Range to 50. The Sonar View will then show the 30 foot area between 20 and 50, and will not show the surface or the bottom (assuming the bottom is deeper than 50 feet), and will show greater detail for that area between 20 and 50 feet.

NOTE: A minimum distance of 10 feet will be maintained between the Upper and Lower Range regardless of the manual settings entered.

To adjust the Upper Range:

1.Make sure you are in Advanced Mode, then highlight Upper Range on the Sonar X-PressTMMenu.

2.Use the LEFT or RIGHT 4-WAY Cursor Control keys to increase or decrease the Upper Range setting. (0 to 990 feet or 0 to 327 meters [International Models only], Default = 0)

Lower Range

Lower Range sets the deepest depth range that will be displayed. Automatic is the default setting. When in automatic mode, the lower range will be adjusted by the unit to follow the bottom. Selecting a specific setting locks the depth range into Manual mode. Use both Upper and Lower Range together to view a specific depth range manually when looking for fish or bottom structure.

Mwill be displayed in the lower right corner of the screen when you start manually adjusting the Lower Range to indicate that you are in Manual mode.

For example, if you are fishing in 60 feet of water but are only interested in the first 30 feet (surface to a depth of 30 feet) you should set the Lower Depth Range limit to 30. The display will show the 0 to 30 foot range, allowing you to see a more detailed view than you would see if the display went all the way to the bottom.

NOTE: A minimum distance of 10 feet will be maintained between the Upper and Lower Range regardless of the manual settings entered.

To adjust the Lower Range:

1.Highlight Lower Range on the Sonar X-PressTMMenu.

2.Use the LEFT or RIGHT 4-WAY Cursor Control keys to increase or decrease the Lower Range setting. (AUTO, 10 to 1000 feet, 3 to 330 meters [International Models only], Default = AUTO)

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Contents 343c Operations Manual Thank You Table of ContentsSetup Menu Tab Alarms Menu TabTroubleshooting Specifications Glossary Contact HumminbirdHow Sonar Works DualBeam Plus Sonar High Sonar Intensity Return Bait Ball What’s On the DisplaySonar View ViewsFreeze Frame Understanding Sonar HistoryReal Time Sonar RTS Window Bottom Presentation 200/83 kHz Split Sonar View Sonar Zoom ViewBig Digits View POWER/LIGHT KeyKey Functions Circular Flasher ViewExit Key Menu KeyWAY Cursor Control Key Menu System Powering Up the UnitStart-Up Options Menu Exit Normal operation by powering your Fishing System offNormal Operation Normal Simulator System StatusExit the Simulator by powering your Fishing System off Self Test Accessory TestExit System Status by powering your Fishing System off SimulatorSonar X-PressTMMenu To adjust the SensitivitySensitivity Highlight Sensitivity on the Sonar X-PressTMMenuTo adjust the Lower Range To adjust the Upper RangeUpper Range Lower RangeZoom Level Chart SpeedBottom Lock Bottom RangeBeam Select Sonar Menu TabTo use Beam Select Highlight Beam Select on the Sonar main menuTo change the RTS Window setting To change the Fish ID Sensitivity settingFish ID+TM Fish ID SensitivityZoom Width Bottom ViewKHz Sensitivity Depth LinesMax Depth Surface ClutterNoise Filter Water Type Alarms Menu TabTo change the Water Type setting Fish ID Alarm Depth AlarmLow Battery Alarm Temp AlarmSetup Menu Tab Alarm ToneTo change the Alarm Tone setting Highlight Alarm Tone on the Alarms main menuUnits Depth User ModeUnits Temp Units DistanceSelect Views Triplog ResetRestore Defaults Temp Offset Select ReadoutsDepth Offset Speed Calibration TroubleshootingTo change the Speed Calibration setting Problem Possible Cause Display ProblemsFinding the Cause of Noise IsolationSonar Terms SpecificationsGlossary 531447-1A343cEng.qxd 11/11/2005 918 PM 531447-1A343cEng.qxd 11/11/2005 918 PM Receiver See Transmitter 531447-1A343cEng.qxd 11/11/2005 918 PM Contact Humminbird