User manual HUMMINBIRD 400TX

[. . . ] INSTALLATION PREPARATION PARTS SUPPLIED PARTS SUPPLIED Before installing your new Humminbird fishfinder, please ensure the following parts are included in the box: · · · · · Fishfinder Transducer with 20' (6m) of cable and mounting hardware kit Mounting system and mounting hardware kit 6' (2m) power cable Publications kit It any of these items is missing, call our Customer Support Hotline. ACCESSORIES Humminbird offers a wide assortment of accessories that complement and expand the capability of your new fishfinder. These accessories are designed with the same high standards and are backed by the same one-year warranty. The Humminbird Accessory catalog included with your unit contains descriptions of the many accessories available and ordering information. [. . . ] The 400TX 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 will be 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 that 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 is especially helpful in setting bait depths or for downrigger operation. The specific fish symbol indicates the type of sonar beam the fish is detected in. This gives you a reliable indicator of side to side location relative to boat movement. Hollow fish symbols facing to the right are in the right beam and therefore are to the right side of the boat (as viewed from the driver seat facing forward). Hollow fish symbols facing to the left are detected in the left beam, and thus the fish is to the left side of the boat. Solid fish symbols represent fish in the single center beam, and these fish are directly under the boat CONTROL FUNCTIONS The 400TX uses a simple six button keypad for all user input. Press any button and an audible "chirp" confirms the control input. If a button has no function or is inappropriate for the situation, an audible "error" is heard. To enter simulator, with the unit powered off, press and hold POWER for several seconds until a continuous chirp is heard. With the unit powered on, press LIGHT once to turn the backlight on "low. " Press LIGHT a second time to turn the backlight on "medium, " a third time to turn the backlight on "high", and a fourth time to turn the backlight off. The backlight is very effective for low-light and nighttime operation. When the backlight is on, the 400TX will consume more power than with the backlight off. This is important when using the 400TX in a portable configuration powered by a separate battery, or when powering the unit from a trolling motor battery. When powering the unit from a battery such as in portable applications, you can prolong the battery life by using the backlight at a minimum. [. . . ] With the boat stationary over a flat, consistent bottom, the sonar returns from the left and right beams should be identical. Any discrepancy between these signals may indicate a problem with the location of the transducer. (Often voids or irregularities in the laminated hull of a fiberglass boat will block or degrade one or more of the sonar signals. ) By referring to this screen prior to permanently mounting a through-the-hull transducer, the location can be adjusted until no visible loss is observed. The diagram of the center beam cannot be compared to the left and right beams as this beam is a different frequency and beam width. [. . . ]