User manual EAGLE FISH ID 2 ADDITIONAL INSTRUCTIONS

[. . . ] SENSITIVITY - The ability of a sonar unit's receiverto displaytargets. Increasingthe sensitivity allows weaker targets to be displayed. Also 3 3 4 7 7 10 10 11 CHARTSPEED RANGE ZOOM DIGITAL FISH I. D. FEATURE AUTO ALARMS called "gain". SCROLL SPEED - See CHARTSPEED. CHARTALARM FISH ALARM SPEAKER LIGHT MODE TRANSDUCERS AND CONE ANGLES SIGNAL INTERPRETATION FISH ARCHES WATERTEMPERATURE AND THERMOCLINES SURVEYING A LAKE BAIT FISH HOWTO OBTAINSERVICE SPECIFICATIONS GLOSSARY 12 13 13 14 15 15 15 16 the hull. SHOOT-ThROUGH-HULL A transducerinstallation which allowsthe sonar signalsto pass through a fiberglasshull withoutcuffing a hole in SUPPRESSION - A method used in some sonar units to help eliminate interference or noise. 20 21 21 SURFACECLARITY CONTROL - Reduces or eliminates undesirable signals displayed near the water's surface. [. . . ] This is an audiblefish alarm. A 1AUTO J to the manual mode, pressthe AUTO key. You can return the unitto automatic at anytime by pressing the AUTO key again. Turningthe uniton enables theautomatic mode. To switch PDF compression, OCR, web-optimization with CVISION's PdfCompressor 6 23 BOATS DIRECTION OF TRAVEL OPERATION SENSITIVITY Theunit is in the AUTO SEARCH mode when ft's first turned on. The micro-computer automatically adjuststhe sensitivity and range to find and lock onto thebottom. The digitaldepth flashes"0" until it finds and locks onto the bottom. You can leave the sensitivity in the automatic mode or manually adjust it to suit conditions. You mayneed to increase thesensitivity to showfish symbols when the unit is in automatic. The letters "SENS" will flash on the right side of the display. A verticalbar appears on the left side of the screen. ( See below. ) This indicates the sensitivitylevel. To increase thesensitivity, press and holdthe up arrow key until the sensitivity is at the desired level. The down arrow key decreasessensitivity in the same manner. The height of the signal depends on the target's height. As you pass over a post, it should be clearly visible as a short line extending above the bottom signal. A steep slope returns a wide signal, the steeperthe wider. Signals returned from a high underwater cliff are usually the widest of all. Brush usually lies on the bottom and shows up as clumpsrising above the bottom signal. Brush signals look similarto large rocks; however Remember, when the unit's automatic feature is on, the receiver'ssensitivity automatically adjuststo thesurrounding conditions. The microcomputerplaces it at a level slightlyabovetheminimum required to pick up the bottom signal. However, ft's possible to change the sensitivity level whilethe unit is in automatic. Thismaybe desirableif the sensitivity level is not high enoughto showfish or other small detail. The unit will increase the sensitivity to pick up the bottom signal, then add in the level you programmed. their signal is not as strong as rock. FISH ARCHES Fish arches are created when the cone of sound passesover a fish. The distance to a fish when the cone first strikes ft is shownas "A" on the next page. When the center of the cone strikes the fish, the distance is shorter, as shown in "B". As the cone leaves the fish, the distanceincreases again as shown in "C". feature is off, the depth of the water will affect the size and shape of the fish arch due to the cone angle diameter. [. . . ] To separatethe alarms, the fish alarm's tone sounds differentthan the chart alarm. Both alarms may be used at the sametime. iii . L :t::i= := 13 16 PDF compression, OCR, web-optimization with CVISION's PdfCompressor CHART ALARM To setthe ChartAlarm, press the CHARTALARMkey on the keyboard. The words "Chart Alarm"flashesin thelower right cornerofthescreen. A verticalbar also displays on the left side of the screen. [. . . ]