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. [. . . ] Start with a map of the lake, if possible, and indicatethe promising spots in relation to landmarkson shore. As you go about your survey, your unit will tell you thedepth and typeof bottom. It will also reveal suspended fish. AUTO Turningtheuniton enables theautomatic mode. You can return theunit to automatic at anytime by pressing theAUTO key again. Keep a few marker buoys in the boat, ready to toss overboard. Withthe school thus marked, you can make your turn and come back to fish in exactly the right spot. Unless you mark the school of fish when you're over it, you may not be able to find it again. 23 6 PDF compression, OCR, web-optimization with CVISION's PdfCompressor WATERTEMPERATURE AND THERMOCLINES Water temperature has an important-if not controlling-influence upon the activities of all fish. Fish are cold blooded and their bodies are always the temperature of the surrounding water. At this time, they need about a fourth as muchfood as they consume in the summer. Most fish don't spawn unless the water temperature is within rather narrow limits. A surface temperature meter such as Lowrance's LDT3000 helps identifythe desired surface water spawning temperatures for various species. Bass and otherfish eventually die outwhen stocked in takes that remain too cold duringthesummer. While some fish have awider temperature tolerancethan others, each has a certain range within which it tries to OPERATION When first turned on, the X-20 is in the AUTO SEARCH mode. The micro-computer automatically adjusts the sensitivity and range to find and lock onto the bottom. 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. To increase the sensitivity, press and holdthe up arrow key until the sensitivity is at the desired level. 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. 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 word "AUTO" will disappearfrom thedisplay, signifying the automatic sensitivity and chart range features are off. This will reset thesensitivity, so you maywish to increase it to see fish or other detail. key to turn it on. RANc 213 R1D 4. tin -'U t II V AUTO ___. -- MODE 2 - This is the same as mode 1 except it has FASTRAK. It converts all echoes to horizontal bars when they r] J AUTO RA?4&E IL! ZOOM -----i 2: FisI-l to I . rjr "p Cu first appear on the This gives a screen. rapid update of condi- tions directly under the boat. [. . . ]