User manual LOWRANCE X-20

[. . . ] X-20 INSTALLATION AND OPERATION INSTRUCTIONS ·LOWRANCE ELECTRONICS, INC. LITHO IN U. S. A. SKELLY DR. , TULSA, OK 74128 PDF compression, OCR, web-optimization with CVISION's PdfCompressor TABLE OF CONTENTS INTRODUCTION INSTALLATION POWER CONNECTIONS NOISE TRANSDUCER KEYBOARDBASICS OPERATION SENSITIVITY CHARTSPEED RANGE ZOOM DIGITAL FISH I. D. FEATURE AUTO ALARMS CHARTALARM FISH ALARM SPEAKER LIGHT MODE TRANSDUCERS AND CONE ANGLES SIGNAL INTERPRETATION FISH ARCHES WATERTEMPERATURE AND TI-IERMOCLINES SURVEYING A LAKE BAIT FISH HOW TO OBTAIN SERVICE SPECIFICATIONS GLOSSARY 1 1 1 3 3 4 7 7 9 10 10 11 -- 4 I A AU I ZOOM a ZOOM Cr -- p. ' ---- 1 s. r jfl JLj ASH ID I 12 13 13 __J. S 14 15 15 15 iLI . J. L4fl 16 18 19 20 ACTUAL UNRETOUCHED PHOTOGRAPHS TAKEN ON GRAND LAKE OF THE CHEROKEES, OKLAHOMA. 23 23 24 24 24 25 ··_--___. S --: 4: Fi a fri W II II Copyright© 1989, Lowrance Electronics, Inc. [. . . ] Thedigital depth 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 show fish symbols whenthe unit is in automatic. The letters "SENS"will flashon the right side of the display. A verticalbarappears on the left side of thescreen. ( See below. ) This indicates the sensitivity level. To increase the sensitivity, press and holdthe up arrow key until the sensitivity is at the desired level. The down arrow key decreases sensitivity in the same manner. 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 finished setting the sensitivity level, the letters 'SENS" and the sensitivity bar will disappearafter eight seconds. feature is off, the sensitivity can be increased more, even if the unit's automatic featureis on. Thiswill help displayfish and other small detail. Whenautomatic isturned off, the sensitivity level can be increased to its maximum level. SENSITIVITY 7 PDF compression, 22OCR, web-optimization with CVISION's PdfCompressor With highsensitivity settings, a second bottomecho (second echo) may appear. It's caused by the returning signal reflecting off the surface of thewater. Then it makes a second trip to thebottomand back again. <-- BOAT'S DIRECTION OF TRAVEL . A Remember, when the unit's automatic feature is on, the receiver's sensitivity automatically adjusts to the surroundingconditions. The microcomputerplaces it at a level slightlyabovethe minimum required to pick up the bottom signal. However, it's possible to change the sensitivity level while the unit is in automatic. This maybedesirableif the sensitivity level is not high enough to show fish or other small detail. The unit will increase the sensitivity to pick up thebottom signal, then add in the level you programmed. U · . · . U· B U U :z· C U To adjust the sensitivity while the unit is in automatic, simplypress the SENS. Then press either the up arrow key to increase it, or the down arrow key to decrease it. [. . . ] Both alarms may be used at the sametime. Fish Alarm sounds an audible alarm when fish CHARTALARM To setthe ChartAlarm, press theCHARTALARM key on the keyboard. Thewords "Chart Alarm" flashesin the lowerright cornerofthescreen. A verticalbar also displayson the left side ofthe screen. It will stay on thescreen for eightsecondsor foreightsecondsafteryou have finished adjusting it. [. . . ]