User manual HUMMINBIRD 200DX DUAL BEAM

[. . . ] TABLE OF CONTENTS INSTALLATION PREPARATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Parts Supplied. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Installation Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] If the bottom is soft mud or sand, the depiction will be thick and less dense. It the bottom is rocky or rugged in composition the depiction is of varying density and textured in appearance. The information drawn is a distance measurement so if the boat is moving up and down over flat bottom, the bottom depiction often appears in regular variations that match wave timing. USING THE 200DX WHAT YOU SEE ON SCREEN Structure. The sonar configuration of the 200DX is optimized to give the most accurate depiction of bottom structure possible. Grass, trees, stumps, wrecks or other debris are accurately displayed, however the depiction or these objects varies with boat speed and direction. The best way to learn to interpret structure is to operate the 200DX over a variety of known conditions and experiment with user functions to best represent those conditions on-screen. Surface clutter is the layer or water near the surface that is rich in algae and other growth and often it aerated by wind or wave action. This area of water interferes with sonar transmission and often appears on-screen as regular clusters of individual dots near the 0 line. When a sonar signal is reflected off the bottom back to the transducer there is often enough energy left in the signal to be reflected off the surface of the water back to the bottom a second time. Second returns appear as a slightly weaker bottom representation exactly twice the depth of the primary bottom return. The second return is most likely to occur in shallow water and in areas of relatively hard bottom. USING THE 200DX CONTROL FUNCTIONS Fish ID. The 200DX uses advanced signal processing to further evaluate any sonar return between the surface and the bottom. For instance a small school of Bait fish usually appears as a dense cluster of individual dots. If the return meets certain additional criteria, a fish symbol is assigned. There are three different size fish symbols used to indicate the intensity of the sonar return. While signal intensity is a good indicator of relative fish size, different species of fish have different sonar characteristics, so it is not always possible to distinguish fish size between varying species. The signal intensity is normalized for depth so a small fish close to the boat does not appear as a large fish symbol. ID+ adds an additional piece of information to help the user locate fish. On selected fish symbols the digital depth of the designated fish is drawn to help locate the fish vertically. This gives you a reliable indicator of side to side location of the fish relative to the boat. Fish symbols that are hollow are detected in the wide beam and are around the boat. Solid fish symbols represent fish detected in the narrow beam and are directly under the boat. [. . . ] If engine noise is causing the interference, the problem will intensify at higher RPMs. Increase the engine speed with the boat stationary to isolate this cause. If the transducer is mounted too close to the propeller, the turbulence generated can interfere with the sonar signal. Ensure that the transducer is mounted at least 15" (38cm) from the prop. MAINTENANCE AND WARRANTY WARRANTY HUMMINBIRD ONE YEAR FULL WARRANTY First year repairs (from original date of purchase) on your Humminbird fishfinder are absolutely free. [. . . ]