User manual LOWRANCE X-4

[. . . ] INSTALLATION AND OPERATION MANUAL X-4 LCG RECORDER N · LOWRANCE ELECTRONICS, INC. SKELLY TULSA, OKLA. 12OOO E. DR. , 74128 PDF compression, OCR, web-optimization with CVISION's PdfCompressor Litho in U. S. A. 988-0105-21 TABLE OF CONTENTS Introduction Installation Power Connections Noise Keyboard Basics Operation On Off 2nd Clear Auto Sensitivity Automatic SensitivityAdvanced Chart Speed Lower Limit Upper Limit Scale Auto Rangewith Zoom Bottom Track Digital 10th Range 2 2 3 4 5 7 7 7 7 a 8 8 10 io ii i Alarms Zone Alarm Note Key Clearing Zone Alarm Depth Alarm Discrimination Light Surface Clarity Control (SCC) Feet-Fathoms-Meters Transducersand Cone Angles Signal Interpretation Fish Signals Water Temperature and Thermoclines Bait Fish Surveyinga Lake How to Obtain Service How to Obtain aSchematic Specifications 2 13 14 15 15 17 17 18 20 20 20 22 23 23 24 25 26 27 29 30 30 31 31 32 PDF compression, OCR, web-optimization with CVISION's PdfCompressor 1 COMMAND SUMMARY 1. VIEW SCC WITHOUT CHANGING DIGITAL INTRODUCTION Welcome to the world of sportfishingsonar. YourLowrance X-4 is a high quality sonar designed for both professional and novice users. The X-4 automaticallyfinds and displays the bottom depth, fish, and structure by just turning it on. As you grow familiar with your X-4, you can try some of its remarkable features and 'fine tune" the unitto the surrounding conditions. [. . . ] Ifthe automaticsensitivityis tumed off, and the signal narrows down, then it meansthatyou have moved over a mud bottom because mud absorbs the sound wave and retums a weak signal. Ifyou havethe automatic senstivityturned on, watch the sensitivitybar. As the boat passes over the mud bottom, the X-4 will automaticallyincreasethe sensitivity to maintaina good bottom signal. Thesensitivitybar will help you in determiningifthe bottom is softor hard. If it increaseswhile in the same depth of water, then the boat has moved over a softbottom. If it decreases, then it is over a hard bottom. Of course, as the water depth increasesor decreases, the sensitivity will also change. Big rocks or stumpson a smooth bottom send back signalsabove the bottom level signal. The height of the signal depends on the target's height. If youwatch as youapproach a postor a tree stump, it will be clearly visible as a short line extending above the bottom signal. TOO LITrLE SENSITIVITY SENSITIVITY AWUSTED PROPERLY Simulated Picture Simulated Picture 26 PDF compression, OCR, web-optimization with CVISION's PdfCompressor 9 TRANSDUCERS AND CONE ANGLES The sound waves from the transducerspread out intothe water in a cone shaped beam, much like the beam from a flashlight The angle betweenthe outside edges ofthe cone is called the cone angle. Lowrance offers a choice of transducerswith either an 8 or 20 degree cone angle that will interchangewith any of the 192 kHz sonar products. In other words, any Lowrance sonar instrumentcan be used with any Lowrance transducer of the same frequencywith no loss of performance. transducer will result in a However, the use of any other manufacturers' loss of performance. Generally, wide cone angle transducers(20 degrees) are ideally suited for operating in shallow to mediumwater depths. The 20 degree cone angle allows youto seemore of the underwaterworld. In 15 feet of water the 20 degree cone covers an area about six feet across. The 8 degree transducer covers only about a two foot circle. When the horizontal bar reaches the far right hand side of the screen, the sensitivity level is at maximum. If high sensitivitysettings are used, a second bottom echomay appear. Thisis normal and is caused by the returningsignal reflecting off the surface of the water, making a second trip to the bottom and backagain. This is called "second echo". To turn Auto Sensitivityback on, press the AUTO key. Remember, both automatic sensitivitycontrol and auto ranging functions are turned off and on at any time by pressingthe AUTOkey. The two controls cannot be turned off or on separatelyby pressing the AUTO key. AUTO SENSITIVITYADVANCEDOPERATION When the X-4 is in the automatic mode, the sensitivity of the receiver will be adjustedto ten steps above the minimum required to pick up the bottom signal. (There are 32 steps of sensitivityavailable. ) Thesensitivitylevel can be changed whilethe X-4 is in the automatic mode. Thismay be desirable if the level of sensitivitychosen by the X-4 is not enough to show fish or other small detail. Oncethe sensitivityhas been changed, the X-4 will increasethe sensitivity enough to pick up the bottom signal, then add in the level you programmed. If desired, any amount of sensitivityup to the maximummay be added. To adjust the sensitivitywhile the X-4 is in the automatic mode, simply press either the right arrow key> to increase the sensitivityor the left arrow key <to decrease it If the sensitivityis decreased to minimum, the X-4'saudible tone will "flutter". The same is true ifyou try to go above the maximumlevel. As you press the arrow key, the sensitivitybar will move right or left, according to the amount of sensitivitychosen. pth 50 1100 1150 Diameter 8' 20' 7ff. [. . . ] If the boat goes into water that is shallower than the shallow alarm's set point the alarmwill sound. Thesame will happen if the boat goes into waterdeeper than the deep alarm set pointThismakes a useful anchor watch or when navigatingthrough a channel. I DIGITAL [ DIGITAL 10TH ' eTIVS1. ]ri;t SHALLOW ALARM DEEP ALARM A complete digital sonar is built inside the X-4. It automatically discriminates betweenthe valid bottom echoes and false echoes from fish, thermoclines, or other signals. Thedigital display will show only the bottom depth. It canbe used anytime, regardless ofthe mode theX-4 is in. 15 20 PDF compression, OCR, web-optimization with CVISION's PdfCompressor To adjustthe shallow (top) alarm, press the SHALLOWSET key, then press the up arrow key to move the top ofthe alarm window up, or the down arrow key to move the top of the zone deeper. Thebottom of the zone can be set in the same mannerusing the DEEP SET key. [. . . ]