Eagle Electronics 500CDF manual Sonar Features menu with a frequency of 200 kHz selected

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The default frequency is 200 kHz, which is best for use in shallow water (about 300 feet or less). This frequency is the best choice for about 80 percent of the fresh and salt water sport fishing applications. When you get into very deep salt water, 300 to 500 feet or deeper, the 50 kHz fre- quency is the best choice.

The 200 kHz transducer will give you better detail and definition, but less depth penetration. The 50 kHz transducer will give you greater depth penetration, but a little less detail and less definition. (Remember, all sonar units typically read deeper in fresh water than in salt water.)

There is a common exception to these rules of thumb. Some fishermen on freshwater lakes (or the ocean) using downriggers like to see them on the sonar. In many of those cases, you'll see a 50 kHz transducer frequency in use because the wider cone angle lets them watch the bait.

Sonar Features menu with a frequency of 200 kHz selected.

To change the frequency setting to 50 kHz:

1.From the Sonar Page, press MENUto SONAR FEATURESENT.

2.Press to FISH DEPTHSto 50 KHZENT.

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Contents Installation and Operation Instructions Page Table of Contents ColorLine level To turn Auto Sensitivity back on Page How this manual can get you out on the water, fast Read Me FirstPage 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 Good and poor transducer locations Transom Page Dot Alignment letters Positions Transducer Ratchets Bolt Transom Bottom Hull Flat-bottom hull Deep-vee hull Internal tooth washer TMB-S bracket Bolt Nut Flat washer Transducer mounted on trolling motor, side view Partial fish arches Hulls With Flotation Materials Transducer location High speed Trolling speed Page Epoxy transducer to hull Speed/Temperature Sensors Optional Speed Sensor Installation Good location Power Connections Power connections for the sonar unit Page Front 72.9 173.9 23.4 157.9 Millimeter 56.9 Inch In-Dash Template Face Cover Page Keyboard Basic Sonar OperationPower/lights on and off Main Menu Pages Pages Menu, showing Sonar display options Page Page Sonar Page, showing full sonar chart mode 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 To turn off the alarm, press ALARM↓ to Deep Alarm Enabledentexit Backlight Level Calibrate Speed Chart Speed ColorLine Thin or no ColorLine Wider ColorLine Depth Cursor ContrastDepth Range Manual Depth Range AutomaticFasTrack Fish I.D. Fish Symbols & Depths FishTrack Frequency Change Transducer Frequency SeaFinder CDF only Symbols with FishTrack depthsSonar Features menu with a frequency of 200 kHz selected HyperScroll Noise RejectionOverlay Data Page To return to the previous page, press Exit Tip Ping Speed & HyperScrollPage Pop-up Help Reset Options Reset Water Distance Screen Contrast and Backlight LevelSet Keel Offset Press MENUMENU↓ to SET Keel Offsetent Sensitivity & Auto Sensitivity Page Software Version Information Set LanguageSonar Page & Sonar Chart Display Options Sonar Chart ModePage Page Customizing the Digital Data/Chart Screen Sonar Simulator Stop Chart Surface Clarity Press ↓ or ↑ to select clarity levelEXITEXIT Units of Measure TransparencyZoom & Zoom Bar VolumeZoom Pan Troubleshooting Page Page Page Supplemental Material FCC Compliance Page Index Page Page 102 103 How to Obtain Service… Accessory Ordering Information for all countries Visit our web site