Humminbird 77c manual To adjust the Sensitivity, To adjust the Upper Range

Page 15

M77_Man_Eng_531350-1_B.qxd 1/3/2005 4:30 PM Page 28

Sensitivity

Sensitivity controls how much detail is shown on the display. Increasing the sensitivity shows more sonar returns from small baitfish and suspended debris in the water; however, the display may become too cluttered. When operating in very clear water or greater depths, increased sensitivity shows weaker returns that may be of interest. Decreasing the sensitivity eliminates the clutter from the display that is sometimes present in murky or muddy water. If Sensitivity is adjusted too low, the display may not show many sonar returns that could be fish.

Sensitivity at Low

Sensitivity at Medium

Sensitivity at High

To adjust the Sensitivity:

1.Highlight Sensitivity on the Sonar X-Press™ Menu.

2.Use the LEFT or RIGHT 4-WAY Cursor Control keys to increase or decrease the Sensitivity setting. (Low = 1, High = 20, Default = 10)

Upper Range

(Advanced: Sonar, Split Sonar and Big Digits Views Only)

Upper Range sets the shallowest depth range that will be displayed on the Sonar, Split Sonar and Big Digits 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 and Big Digits 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-Press™ Menu.

2.Use the LEFT or RIGHT 4-WAY Cursor Control keys to increase or decrease the Upper Range setting. (0 to 1490 feet or 0 to 497 meters [International Models Only], Default = 0)

23

24

Image 15
Contents Matrix 77c Operations Manual Thank You Table of ContentsSonar X-Press Menu Alarms Menu TabSetup Menu Tab Views Menu Tab Accessories Menu Tab TroubleshootingDualBeam Plus Sonar How Sonar WorksWhat’s On the Display Temperature water surface temperatureSonar View ViewsUnderstanding Sonar History Real Time Sonar RTS WindowSonar Zoom View Big Digits View 200/83 kHz Split Sonar ViewBig Digits View 200/83 kHz Split Sonar ViewBottom Presentation Menu Key POWER/LIGHT KeyKey Functions View KeyExit Key Accessory BusPowering Up the Unit Advanced features such as WeatherSense, GPSChange to the screen Menu SystemPress the Menu key once to display Keys to reactivate the X-Press MenuSimulator Exit Normal operation by powering your Fishing System offStart-Up Options Menu Normal OperationSystem Status PC ConnectSonar X-Press Menu Upper Range To adjust the SensitivityTo adjust the Upper Range SensitivityChart Speed Lower RangeBottom View Sonar Zoom View Only To adjust the Zoom LevelZoom Level Sonar Menu TabHighlight Beam Select on the Sonar main menu Beam SelectFish ID+ To use Beam SelectFish Sensitivity KHz SensitivityDepth Lines Surface Clutter Noise FilterMax Depth Water Type Alarms Menu TabTo change the Water Type setting Setting. Fresh, Salt, Default = FreshTemp Alarm Depth AlarmFish ID Alarm Low Battery AlarmUnits Distance Setup Menu TabUnits Depth Units TempUnits Speed User ModeTriplog Reset Restore DefaultsTo Select Readouts TemperatureSelect Readouts VoltageNmea Output Depth OffsetTemp Offset Speed CalibrationAccessories Menu Tab Views Menu TabTo Change the View Status of Any View Control head loses power at high speeds TroubleshootingDisplay Problems Problem Possible CauseMatrix Fishing System Accessories Finding the Cause of NoiseIsolation Specifications Contact Humminbird