Humminbird manual 531524-1A 717 & 727 ManEng.qxp 9/30/2006 724 PM

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531524-1_A - 717 & 727 Man_Eng.qxp 9/30/2006 7:24 PM Page 89

Grayscale, Inverse: Inverse Grayscale is a Humminbird® feature that reverses the correlation of sonar signal strength and the shade of gray typically used to represent it. The strongest sonar signals are represented by "white", and progressively weaker signals are represented in progressively darker shades of gray. While somewhat counter-intuitive, this method makes the sonar images crisper, and has the benefit of enhancing the apparent sensitivity because the weaker signals appear bolder. Inverse grayscale works well in very clear water. Debris-laden water often appears as a lot of clutter on the screen.

Instant Image Update: Instant Image Update is a Humminbird® feature that updates all the sonar information on the display when Sensitivity and a variety of sonar settings (Bottom View, Range, etc.) are modified. This differs from the traditional functionality that only updates the new sonar information collected after the setting change. Instant Image Update permits more accurate fine-tuning of the display because the user can see the results on the complete sonar graph. When combined with the Freeze Frame feature, the user can adjust and understand the effects of many different sonar settings quickly and easily.

Maximum Depth Menu: The Maximum Depth Menu is a Humminbird® feature that optimizes performance based on the maximum operational depth set by the user. Many Humminbird® units can operate across a very broad depth range (up to 2500 feet) which causes the unit to "look" up to that full depth under some circumstances. Due to the speed of sound in water, this can result in less responsiveness because the unit has to wait for a longer period of time to receive the sonar signal. When the Maximum Depth menu is set to a lower value, the unit only looks up to the setting, which increases the responsiveness of the unit. This is an important feature for anyone operating in shallower depths!

Noise: Noise is unintentional, external sound waves that interfere with the optimal operation of sonar. Noise appears as random "dots" on the display, and is caused by a variety of sources. Electrical noise (from trolling motors, bilge pumps, VHF radios) typically manifests as a consistent dot pattern. Electrical noise can be isolated by selectively turning on and off other electrical devices to determine the source. Often re-routing the power cable, or connecting to an alternative power supply (second battery) can help overcome electrical noise. Hydrodynamic noise (from propeller and/or hull cavitation) has a more random appearance and is generally related to boat speed, so that faster operation results in more noise.

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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 With optional-purchase QuadraBeam Plus Transducer QuadraBeam Plus SonarWith optional-purchase WideSide transducer WideSide SonarUniversal Sonar About What’s On the DisplayOrmation Views Sonar View Sonar ViewUnderstanding Sonar History Freeze Frame and Cursor Real Time Sonar RTS WindowBottom 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 Side Beam View, Default LayoutSide Beam View, Classic Layout Side Beam View, Slanted Layout WideSide View WideSide ViewView Key POWER/LIGHT KeyKey Functions WAY Cursor Control Key Menu KeyExit Key Accessory Bus Powering Up the Unit Menu System 531524-1A 717 & 727 ManEng.qxp 9/30/2006 723 PM Normal Operation Start-Up Options MenuSimulator Self Test System StatusWith PC Connect Cable only Accessory TestPC Connect Sonar X-Press Menu WideSide transducer WideSide view only SideSensitivity Upper Range Lower Range Side Beam Range Bottom View Chart SpeedQuad Layout Sonar Zoom View only Zoom LevelBottom Lock Bottom Range Sonar Zoom View only, when Bottom Lock is OnSonar Menu Tab Beam Select Fish ID+ Fish ID Sensitivity Advanced Zoom WidthKHz Sensitivity Advanced with QuadraBeam Plus transducer To change the 455 kHz Sensitivity settingAdvanced with WideSide transducer WideSide SensitivityDepth Lines Surface Clutter Max Depth Noise FilterWater Type Transducer Select Alarms Menu Tab Fish ID Alarm Depth AlarmWith optional-purchase temp. probe or Temp/Speed only Low Battery AlarmAux. Temp. Alarm Alarm Tone Temp AlarmSetup Menu Tab Units Temp Units DepthUnits Distance International onlyLanguage User ModeUnits Speed Restore Defaults Triplog ResetAdvanced, Sonar view only Select ReadoutsDefault Sonar View Customized Sonar View Aux. Temp. Offset Depth OffsetAdvanced, with Temp/Speed only Temp OffsetSpeed Calibration Digits Format Nmea Output Views Menu Tab Accessory TestAccessories Menu Tab Series Doesn’t Power Up TroubleshootingProblem Possible Cause Display ProblemsIsolation Finding the Cause of NoiseSeries 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 Operating Frequency kHz and 83 kHz DualBeam Plus Specifications531524-1A 717 & 727 ManEng.qxp 9/30/2006 724 PM Sonar Terms Glossary531524-1A 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
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