Eagle Electronics 320 manual Sonar Operations

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9.If you are drifting at a very low speed or anchored, you are not mov- ing fast enough for a fish to return the tell-tale fish arch signal. As you drift over a fish, or as a fish swims through the transducer's signal cone, the fish echo will appear as a straight line suspended between the surface and the bottom.

10.To turn off the unit, press and hold PWR key for three seconds.

Sonar Operations

As you can see from the quick reference, basic operation is pretty easy, right out of the box. If you are a sonar novice, try operating the unit with the fac- tory defaults until you get a feel for how it's working.

As you're learning the basics, there is one setting you might want to tinker with from time to time — Sensitivity.

Sensitivity controls the unit's ability to pick up echoes. If you want to see more detail, try increasing the sensitivity, a little at a time. There are situations when too much clutter appears on the screen. Decreasing the sensitivity can reduce the clutter and show the strongest fish echoes, if fish are present. As you change the sensitivity setting, you can see the difference on the chart as it scrolls.

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

Adjusting sensitivity in Auto Sensitivity Mode is similar to manually ad- justing a car's speed with the accelerator pedal while cruise control is on. You can tell the car to run faster, but when you let off the gas the cruise control automatically keeps you from running slower than the minimum speed setting. In the sonar unit, auto mode will let you increase sensitiv- ity to 100 percent, but the unit will limit your minimum setting. This pre- vents you from turning sensitivity down too low to allow automatic bot- tom tracking. When you change the setting with auto turned on, the unit will continue to track the bottom and make minor adjustments to the sen- sitivity level, with a bias toward the setting you selected.

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Contents FishMark 320 SeaFinder 320DF Page Table of Contents Fish I.D. Fish Symbols & Depths Read Me First How this manual can get you out on the water, fastGeneral Figuration and installation, bottom composi How to use this manual typographical conventions How Sonar WorksPage Page Transducer Installation PreparationsSingle-frequency transom installations Dual-frequency transom installationsSingle-frequency trolling motor installations Shoot-through hull installationsGood and poor transducer locations Transom Transducer centerline Hull bottom Transom Transducer Assembly and Mounting DotAlignment letters AlignmentPositions TransducerRatchets Bolt Flat washer Lock washer Nut Metal Nut Washer RubberWashers BoltTransom Flat-bottom hull Deep-vee hull BottomHull Internal tooth washer TMB-S bracket Bolt Nut Flat washer Partial fish arches Transducer aimedToo far back Full fish arch Proper transducer angleSHOOT-THRU-HULL Preparation Transducer location High speed Trolling speed Speed/Temperature Sensors Spread epoxy here Sand this surfaceSonar unit Rear viewGood location Power Connections Transom Bottom of hullOptional power off switch for Sonar unit Rear view Power/trans Power c able Accessory Transducer CableMounting the Unit Bracket, In-Dash or Portable Ducer socketFront 72.9 173.9 23.4 137.9 157.9 Millimeter 56.9 Inch146.5 113.5 Millimeters InchesCell battery Face CoverBasic Sonar Operation KeyboardPower/lights on and off Menus Main Menu Commands Sonar Menu Commands Pages Sonar Page, showing full sonar chart mode. bar graph Page Basic Sonar Quick Reference Sonar Operations Page To Restore Factory Settings Important TipPage Page Sonar Options & Other Features Alarms To adjust and turn on the zone alarm To adjust and turn on the shallow alarmTo adjust and turn on the deep alarm To turn the fish alarm on BrightnessChart Speed Calibrate SpeedDepth box ContrastDepth Cursor Depth Range Manual To switch to Manual Depth RangeDepth Range Automatic Fish I.D. Fish Symbols & Depths FasTrackTo turn Auto Depth Range on again Bar graphPage Page Symbols with FishTrack depths FishTrackFishReveal Press → ↓ to Fish ID DepthsentexitexitPage Frequency Change Transducer Frequency SeaFinder 320DF only Fish Not Visible Fish arch Fish archesGrayline Hard Fish near Grayline Hard Bottom Muddy bottomHyperScroll Noise RejectionOverlay Data Hard Muddy bottom bottom GraylineTo turn off displayed data To change displayed data font sizePing Speed & HyperScroll Page Reset Options Pop-up HelpSensitivity & Auto Sensitivity Reset Water DistanceScreen Contrast and Brightness Page Set Keel Offset Press MENUMENU↓ to SET Keel Offsetent Press MENUMENU↓ to Software Infoent Set LanguageSoftware Version Information Sonar Color Mode Sonar Chart Display OptionsPage Page Customizing the Digital Data/Chart Screen Stop Chart Sonar SimulatorSurface Clarity Press ↓ or ↑ to select clarity levelEXITEXITEXITUnits of Measure Zoom & Zoom BarZoom Pan Page Troubleshooting Page Noise Page Page Page Supplemental Material How to Obtain Service… Accessory Ordering Information for all countries Visit our web site
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320 specifications

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