Humminbird 717, 727 manual Sensitivity

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531524-1_A - 717 & 727 Man_Eng.qxp 9/30/2006 7:23 PM Page 42

Sensitivity

Sensitivity controls how much detail is shown on the display and will adjust the sensitivity of all sonar frequencies. 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.

NOTE: The Sensitivity setting is a global setting and will adjust the sensitivity of all sonar frequencies, as compared to specific sensitivity adjustments (such as 83 kHz Sensitivity, 455 kHz Balance or Wideside Sensitivity) which allow you to adjust the level of sensitivity for one specific beam at a time.

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)

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Contents Series Operations Manual Thank You Table of Contents Setup Menu Tab Views Menu Tab Accessories Menu Tab Troubleshooting How Sonar Works 531524-1A 717 & 727 ManEng.qxp 9/30/2006 723 PM DualBeam Plus Sonar QuadraBeam Plus Sonar With optional-purchase QuadraBeam Plus TransducerWideSide Sonar With optional-purchase WideSide transducerUniversal Sonar What’s On the Display AboutOrmation Views Sonar View Sonar ViewUnderstanding Sonar History Real Time Sonar RTS Window Freeze Frame and CursorBottom Presentation 531524-1A 717 & 727 ManEng.qxp 9/30/2006 723 PM 531524-1A 717 & 727 ManEng.qxp 9/30/2006 723 PM Sonar Zoom View Sonar Zoom View200/83 kHz Split Sonar View Big Digits View Big Digits ViewCircular Flasher View Side Beam View, Default Layout Side Beam ViewSide Beam View, Classic Layout Side Beam View, Slanted Layout WideSide View WideSide ViewPOWER/LIGHT Key Key FunctionsView Key Menu Key WAY Cursor Control KeyExit Key Accessory Bus Powering Up the Unit Menu System 531524-1A 717 & 727 ManEng.qxp 9/30/2006 723 PM Start-Up Options Menu Normal OperationSimulator System Status Self TestAccessory Test PC ConnectWith PC Connect Cable only Sonar X-Press Menu Side WideSide transducer WideSide view onlySensitivity Upper Range Lower Range Side Beam Range Chart Speed Bottom ViewQuad Layout Zoom Level Bottom LockSonar Zoom View only Sonar Zoom View only, when Bottom Lock is On Bottom RangeSonar Menu Tab Beam Select Fish ID+ Fish ID Sensitivity Zoom Width KHz SensitivityAdvanced To change the 455 kHz Sensitivity setting Advanced with QuadraBeam Plus transducerWideSide Sensitivity Advanced with WideSide transducerDepth Lines Surface Clutter Noise Filter Max DepthWater Type Transducer Select Alarms Menu Tab Depth Alarm Fish ID AlarmLow Battery Alarm Aux. Temp. AlarmWith optional-purchase temp. probe or Temp/Speed only Temp Alarm Alarm ToneSetup Menu Tab Units Distance Units DepthUnits Temp International onlyUser Mode Units SpeedLanguage Triplog Reset Restore DefaultsSelect Readouts Advanced, Sonar view onlyDefault Sonar View Customized Sonar View Depth Offset Aux. Temp. OffsetTemp Offset Speed CalibrationAdvanced, with Temp/Speed only Digits Format Nmea Output Accessory Test Views Menu TabAccessories Menu Tab Troubleshooting Series Doesn’t Power UpDisplay Problems Problem Possible CauseFinding the Cause of Noise IsolationSeries Fishing System Accessories 531524-1A 717 & 727 ManEng.qxp 9/30/2006 724 PM 531524-1A 717 & 727 ManEng.qxp 9/30/2006 724 PM Specifications Operating Frequency kHz and 83 kHz DualBeam Plus531524-1A 717 & 727 ManEng.qxp 9/30/2006 724 PM Glossary Sonar Terms531524-1A 717 & 727 ManEng.qxp 9/30/2006 724 PM 531524-1A 717 & 727 ManEng.qxp 9/30/2006 724 PM 531524-1A 717 & 727 ManEng.qxp 9/30/2006 724 PM 531524-1A 717 & 727 ManEng.qxp 9/30/2006 724 PM Receiver See Transmitter 531524-1A 717 & 727 ManEng.qxp 9/30/2006 724 PM 531524-1A 717 & 727 ManEng.qxp 9/30/2006 724 PM 531524-1A 717 & 727 ManEng.qxp 9/30/2006 724 PM 531524-1A 717 & 727 ManEng.qxp 9/30/2006 724 PM Contact Humminbird