Lowrance electronic 500 GPS Receiver User Manual


 
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Require DGPS
You can force AirMap to require DGPS for reporting a valid position.
(The default setting, off, uses DGPS automatically, but doesn't require
it to yield a position.) Here's how to turn it on and off.
1. Press
MENU|MENU| to GPS SETUP|ENT| to REQUIRE DGPS|ENT.
2. To return to the last page displayed, press
EXIT|EXIT.
3. You can return to this command and press
ENT again to turn the fea-
ture off.
Require DGPS command on the GPS Setup Menu.
Screen Contrast and Brightness
To access these screen commands, you first press MENU|MENU|ENT.
Once in the Screen menu:
To adjust the display's contrast:
1. The
CONTRAST slider bar is already selected. Press or to move the
bar. The left end of the scale is minimum contrast; the right end is
maximum contrast.
Screen Command, left, and Contrast bar, right.
To adjust the display's brightness:
1. Press to
BRIGHTNESS. Press or to move the bar. The left end of
the scale is minimum contrast; the right end is maximum contrast.