User manual EAGLE FISH I.D. AND PLUS OPERATION INSTRUCTION

[. . . ] 4< H I I FISH I. D. AND FISH I. D. PLUS INSTALLATION AND OPERATION INSTRUCTIONS LITHO IN U. S. A. 988-0106-31 PDF compression, OCR, web-optimization with CVISION's PdfCompressor EAGI TABLE OF CONTENTS INTRODUCTION INSTALLATION POWER CONNECTIONS NOISE TRANSDUCER KEYBOARD BASICS OPERATION SENSITIVITY 1 1 1 SECOND ECHO - Another echo that registers at roughly twice the depth ofa targetecho. This is caused by the sound waves reflecting off the bottom, strikingthe surface of the water, travelling to the bottom again, and returning to the surface. SECOND FUNCTION KEY - A buttonthat convertsthe functions of the primarykeys to other functions. [. . . ] Notice how the sensitivity bar moves as you change settings. It will move up when the sensitivity is increased. You'll also see the change on the display. After you've finishedsetting thesensitivity level, theletters "SENS"and the sensitivity bar will disappear after eight seconds ·Il A . B C Very small fish probablywill not arch at all. Medium sizedfish will show a partial arch, or a shape similar to an arch if they're in deep water. Largefish will arch, butturn thesensitivity up in deeperwaterto see the arch. Because of water conditions, such as heavy surface clutter, thermoclines, etc. , the sensitivity sometimes cannot be increased enough to get fish arches. One of the best ways to get fish arches is to expand or "zoom" a segment ofthe water. The smallerthe segment, the betterthe screen resolution will be. For the best results, turn the sensitivity up as highas possible withoutgettingtoomuchnoise on the screen. In mediumto deep water, this method should work to display fish arches. 22 7 PDF compression, OCR, web-optimization with CVISION's PdfCompressor With highsensitivity settings, a second bottomecho (secondecho) may appear. It'scaused by the returning signal reflecting off the surface of thewater. Then it makes a second trip to the bottom and back again. Both 8 degree and 20 degreetransducers give accurate bottom readings, even though the bottom signal is much wider on the 20 degree model. This is because you are seeing more of the bottom. Remember, the shallowedge of the signalshowsyou the true depth. The rest of the signaltells you whether you are over rocks, mud, etc. SIGNAL INTERPRETATION Your unit givesan accuratepicture of the bottomthat your boat is passing. A bottom of firm sand, gravel, shell, or hard clay returns a wide bottom signal. If the automaticfeature is off and the bottom signal narrows , then it means that you have moved over a mud bottom. Mud absorbs the sound wave and returns a weak signal. Turn up the sensitivity to see a better bottomsignal. Big rocks or stumps on a smooth bottom send back signals above the bottom level signal. [. . . ] It will stay on the screen foreight seconds or foreight seconds afteryou havefinished adjustingit. This is theChart Alarm's "window. "Any echothat appears between the top and bottom of this bar will sound the alarm. Adjust deep end of thisbar to make a smalleror largeralarm "window. " The shallowend is automatically adjusted by the unitso it won't be triggered by surfaceclutter or otherfalse signals. Next, press thedown arrow to move the bottom of the bar deeper, or press the up arrow to move it shallower. [. . . ]