User manual LOWRANCE X-16 PAPER GRAPH

[. . . ] ________________ -- . '·· NOTICE Periodically wash the Transducer Face with soap and water to remove any oil film that may collect. Oil and dirt on the face will reduce sensitivity or may even preventsounding. GOT A PROBLEM?LET US HELP! Please detail the problem you are experiencing. Our ServiceDepartment may be able to save you the inconvenience of returning your unit. If it is determined that your unit must be returned, full shipping instructions will be provided. INSTALLATION ANID OPERATION MANUAL X-16 OWNER'S MANUAL SCHEMATIC DIAGRAM AND PARTS LIST Should you desire a Schematic sonar unit, please give us a it in Diagram and Parts list for ypur chance to help before sending Lowrance TRUELINE RECORDfor repair. [. . . ] After setting the initial transmitter pulse length, the Discrimination function can be used to eliminate noise and still have good resolution. The X-16will display the initial transmitter pulse length at the bottom of the paper when you over-ride the micro-computer. To distinguish the initial transmitter pulse from the other information printed on the paper, the graph will print P=100 (if the pulse is set to 100 micro-seconds. )A 50 ps initial pulse length would be displayed as P=50. (See Figure 44. ) FIGURE 43 PULSE In the Suppressor section of this manual, we explained the relationship between pulse length and target separation. As pulse length increases, target separation, As pulse length increases, target separation or resolution is degraded but deep water penetration improves. However, if the pulse width is decreased, resolution becomes much better. The X-16 allows you to take advantage of this fact by making it possible to override the initial transmitter pulse length setting from what the micro-computer selects according to the Lower Limit. The initial transmitter pulse length can be set from 30 ps to Figure 44 NOTE: If a pulse length 110 micro-seconds or less is chosen by the operator, the Suppressor is disabled. Also, less than maximum power is transmitted when the pulse length is less than 100 micro-seconds. To set the initial transmitter pulse length, simply press on the PDF compression, OCR, web-optimization with CVISION's PdfCompressor 6 23 · SUPPRESSOR LEVEL 0 1 INITIAL TRANSMIT PULSE INCREASE (micro-seconds) AUTOMATIC 0 2 3 4 5 6 7 100 200 330 450 600 800 IF INITIAL TRANSMIT PULSE LENGTH IS LESS THAN 500 MICROSECONDS: DISCRIMINATION LEVEL SUPPRESSOR 1 1 LEVEL 0 2 3 4 2 3 4 IF INITIAL TRANSMIT PULSE LENGTH IS GREATERTHAN 500 MICRO- SECONDS: DISCRIMINATION LEVEL SUPPRESSOR LEVEL 0 1 1 2 3 4 is automatically increased when the Discrimination level is increased. The following chart shows the relationship between Suppression and Discrimination. Remember, Suppressor value 1 adds nothing to the initial transmit pulse length. In otherwords, if the lower limit selected was 525 feet and a Discrimination level of 2 was 2 3 4 5 selected, the transmit pulse length would be: 525 + 200 = 725 micro-seconds. We added the initial transmit pulse of 525 microseconds which is listed in the initial transmit pulse chart, to 200 micro-seconds, which is Suppressor level 3, according to the Discrimination - Suppressor chart. Now, if we want, we can increase the the digital shows up on the X-16 PAPER SPEED CONTROL This key adjuststhe speed of (random short lines running verthe chart paper. tically across the paper), then increase the Discrimination level When the X-16 is first turned on, until they are gone. To use the Discrimination funcThis setting is good for detailed tion, simply press the level of graphs, in shallow to medium noise rejection desired, from 0 to depths when trolling. It will show proper fish arches at 4, then the Disc (Discrimination) low speeds and keeps high speed key. There should be an immediate change in the amount of noise information from being compresent on the paper. The paper speed should ination setting is printed at the be turned down when using the bottom of the paper each time the unit in deep water. This will prelevel is entered and at intervals vent gapsfrom appearing in the thereafter. In fact, the microcomputer will automatically slow the maxshipped from the factory, the Discrimination level is set to 1. imum speed of the chart paper The Discrimination function can when operating in deep water. [. . . ] Pull out and down on the top of the case front to expose the platen assembly. (See Figure 24). · present in the electronic section when the unit is turned on. Pull out and down on the top of the case front to expose the stylus belt. (See Figure 24). The stylus belt rides over two pulleys located at the right edge of the transport assembly. [. . . ]