User manual GARMIN FISHFINDER 320C

[. . . ] Fishfinder 320C owner's manual and reference guide © Copyright 2003 Garmin Ltd. or its subsidiaries Garmin International, Inc. 1200 East 151st Street, Olathe, KS 66062, U. S. A. 913/397. 8200 or 800/800. 1020 Fax 913/397. 8282 Garmin (Europe) Ltd. [. . . ] These available adjustments are: · Range -- sets the display depth range used for viewing. The unit can be set to automatically track the bottom or set to a user-specified depth range (see "Custom Range" pg. · Zoom -- used to quickly select a display zoom scale or to split the display. When a scale other than `No Zoom' is selected, the Adjustment Menu will display a new selection labeled View or Span. 10 The Zoom function is divided into six display levels: 2X Split ­­ Shows two reduced-size sonar pictures at the same time. The right half of the display screen shows the complete sonar picture at its original scale. The left half shows a portion of the original picture at 1/2 depth scale. 2X Zoom ­­ Displays the 2X zoomed picture on the full screen and does not show the original scale picture. 4X Split ­­ Shows two reduced pictures, the right at the original depth scale and the left at 1/4 the original depth scale. 4X Zoom ­­ Displays only the 4X zoomed picture on the full screen. Btm (Bottom) Split ­­ Shows two reduced pictures, the right at the original depth scale and the left showing sonar returns from the bottom up. All target depths will read as a distance from the bottom. Btm (Bottom) Lock ­­ Displays only the Bottom Lock (returns from the bottom up) picture on the full screen. · View/Span -- available when a Zoom scale other than `No Zoom' is selected. The `View' or `Span' setting is used to change the viewing range of a zoomed display. If the display is 2X or 4X split, only the zoomed portion on the left side of the display will be affected by the change. If the display is Bottom Split or Bottom Lock, `Span' will adjust how far off the bottom the unit will display data. · Gain -- allows you to control the sensitivity of the unit's receiver. This provides some flexibility in what is seen on the display. To see more detail, increase the receiver sensitivity by selecting a higher gain percentage. If there is too much detail or if the screen is cluttered, lowering the sensitivity may increase the clarity of the display. · Target Level -- adjusts which colors are used to display sonar information. 16) will appear on the right side of the screen as you adjust this setting. [. . . ] Unit settings will be retained in the unit's memory without the need for external power. 25 Appendix B Messages and Alarms The Fishfinder 320C uses an on-screen pop-up message system to alert you to unit operating characteristics. Press the ENTER key to acknowledge and return to the page you were viewing. Battery Alarm -- Battery voltage has fallen below the value entered in the Battery Alarm setup. Battery Voltage High-- Too much input voltage, unit will shut off. Boat is not Moving Fast Enough to Calibrate -- Boat is not moving fast enough for the speed wheel to provide a valid speed. [. . . ]