8Using the KeypadZOOM Key— displays the Zoom adjustment control. Pressing Up/Down on the ARROW KEYPAD willselect the desired zoom level.FREQ Key— displays the Frequency adjustment control. Pressing Up/Down on the ARROW KEYPAD willselect the desired sonar frequency.DATA Key— toggles the data field in the upper left of the Sonar Page between the Basic and Advanceddisplays. When held for more than 2 seconds, enters Advanced data setup.GAIN Key— displays the Gain adjustment control. Pressing Up/Down on the ARROW KEYPAD will selectthe desired gain setting.QUIT Key— exits the current menu or configuration option. Returns the display to the previous page and,when entering data, restores the previous data (cancels data entry).MENU Key— from the sonar screen, displays the Adjustment Menu. Press again to access the Main Menufor unit configuration.ARROW KEYPAD— used to select (highlight) menu options and enter data. Also controls movement of thecursor when paused in Pointer mode. Allows direct control of Sonar Page Adjustments.RANGE Key— displays the Range adjustment control. Pressing Up/Down on the ARROW KEYPAD willselect the desired setting.ENTER Key— selects a highlighted menu option. When entering data, it allows you to initiate entry andthen accept the selected value(s). When paused in Pointer mode, will create a waypoint at the Pointer posi-tion (if equipped with compatible NMEA GPS).POWER/BACKLIGHT Key— press and hold to turn the unit on and off. While the unit is on, pressing andreleasing will display the backlight control. Multiple presses of the POWER/BACKLIGHT key will togglethe unit’s backlight between maximum, user-set, and minimum backlight brightness levels.PAUSE Key— pauses the scrolling sonar display. When held for more than 2 seconds, enters Pointer mode.Use the ARROW KEYPAD to move the cursor around the display to examine the depth of specific itemsin greater detail. If the Fishfinder 320C is interfaced with a Garmin GPS or compatible NMEA navigationdevice (pgs. 3-4), pressing the ENTER key in this state will send a WPL sentence to that device (if the cur-rent position is known) creating a waypoint at that position. See pages 13 for more information.)ZOOM FREQDATA GAINQUIT MENURANGE ENTERPAUSENOTE: Always press and release a key to performits primary function. Pressing and holding a key willactivate its secondary function (if available).Keypad UsageUnit Operation