Eagle Electronics 640c manual

Page 53

Fig. 1

Fig. 3

Fig. 2

Fig. 4

These figures show results of different sensitivity levels on the same lo- cation. Fig. 1: Sensitivity at 88 percent, determined by Auto Sensitivity. Typical of full auto mode. Fig. 2: Sensitivity set at 75 percent. Fig. 3: Sen- sitivity set at 50 percent. Fig. 4: Sensitivity set at 100 percent.

You can change the sensitivity level whether you are in Auto Sensitivity mode or Manual Sensitivity mode. The adjustment method works the same in both modes, but it gives you slightly different results.

47

Image 53
Contents Installation and Operation Instructions Page Table of Contents Basic Sonar Quick Reference To turn off HyperScroll Page How this manual can get you out on the water, fast Read Me FirstGeneral Figuration and installation, bottom composi How Sonar Works How to Use this Manual Typographical Conventions Page Preparations Transducer InstallationSingle-frequency transom installations Pad Deadrise less than Strakes Transom Page Page Dot Transducer bracket RatchetRatchet Ratchets Bolt Transom Bottom Hull Flat-bottom hull Deep-vee hull Internal tooth washer TMB-S bracket Bolt Nut Flat washer Partial fish arches Hulls With Flotation Materials Transducer location High speed Trolling speed True bottom Second bottom Manual range setting Page Epoxy transducer to hull Speed/Temperature Sensors Optional Speed Sensor Installation Good location Power Connections Page Power connections for the sonar unit Front 72.9 173.9 23.4 137.9 157.9 Millimeter 56.9 Inch In-Dash Template Cell battery Page Keyboard Basic Sonar OperationPower/lights on and off Main Menu Pages Pages Menu showing Sonar display options Page Page Depth scale FasTrack, fish arches show as horizontal bars Basic Sonar Quick Reference Sonar Operations Page Page Important Tip Page Page Page ASP Advanced Signal Processing Sonar Options & Other FeaturesAlarms To adjust and turn on the Shallow Alarm Enabledentexit Enabledentexit Backlight and Contrast Level Calibrate Speed Chart Speed ColorLine Thin or no ColorLine Wider ColorLine Depth CursorCursor line Depth box Depth Range AutomaticDepth Range Manual FasTrack Fish I.D. Fish Symbols & DepthsPage FishTrack Frequency Change Transducer Frequency SeaFinder unit only Overlay Data HyperScrollNoise Rejection Data list showing Water Speed selected to display on Sonar Tip Ping Speed & HyperScroll Page Pop-up Help Reset Options Set Keel Offset Reset Water DistancePress MENUMENU↓ to SET Keel Offsetent Sensitivity & Auto Sensitivity Auto Sensitivityent Software Version Information Sonar Chart ModeSet Language Sonar Page & Sonar Chart Display Options Page Page Customizing the Digital Data/Chart Screen Sonar Simulator Stop Chart Surface Clarity Press ↓ to select Surface ClarityENT TransparencyUnits of Measure Zoom Bar VolumeZoom Pan Page Troubleshooting Page Page Page Supplemental Material FCC Compliance Page Eagle Electronics How to Obtain Service… Accessory Ordering Information for all countries Visit our web site
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