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10
Using the Keypad
The keypad contains the following keys:
ARROW Keys— used to select (highlight) menu options and enter data. Also control movement of the
cursor when paused in Pointer mode. Allow direct control of Sonar Page Adjustments.
ENTER Key— selects a highlighted menu option. When entering data, allows you to initiate entry and then
accept the selected value(s). When paused in Pointer mode, press to create a waypoint at the Pointer position
(if interfaced with compatible NMEA GPS).
ADJ/MENU Key— from the sonar screen, press and release to display the Adjustment Menu. Press and hold
to access the Main Menu for unit confi guration. From either menu, press and release to return to the sonar
page.
POWER/BACKLIGHT Key— press and hold to turn the unit on and off. While the unit is on, press and
release to display the light/ contrast adjustment window.
To change the backlight/contrast settings:
1. Press and release POWER/BACKLIGHT to display the light/contrast adjustment window. The adjustment
window automatically disappears when idle for 20 seconds.
2. Press the UP or DOWN ARROW keys to change the backlight setting. Press and release
POWER/BACKLIGHT to toggle the backlight setting between maximum, user-set, and minimum
brightness levels.
3. Press the LEFT or RIGHT ARROW keys to change the contrast setting.
4. Press ENTER to return to the Sonar Page.
)
NOTE: Always press and release a key to perform
its primary function. Pressing and holding a key will
activate its secondary function (if available).
Keypad Usage
Unit Operation
ADJ
MENU
250C Manual.indd 10 1/27/2004, 3:55:01 PM