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Battery Level Indicator
The Satellite Page also features a battery level indicator,
located below the status field to the left of the sky view,
which provides a graphic display of the condition of the
internal batteries.
The battery level indicator is calibrated for alkaline
batteries. Ni-Cad and lithium batteries will not
accurately display the battery level due to voltage
differences. No other receiver functions are affect-
ed by using Ni-Cad or lithium batteries.
It’s always best to store your GPS with the batteries
installed to preserve the internal memory and data.
The GPS 38 features a self-charging lithium battery
that continually maintains a full charge while bat-
teries are installed. The lithium battery will maintain
the internal memory for 3 months in the event that
the batteries are removed or totally discharged.
Screen Backlighting
The GPS 38’s automatic backlight feature illuminates
the screen display for a user-defined interval (the default is
15 seconds) after every keystroke. When backlighting is on,
a bulb icon will appear at the bottom left of the sky view.
To turn the screen backlighting on or off:
1. Press the
B
key.
2. To adjust the duration of screen backlighting, refer to the
operation setup section (page 46).
Using the screen backlighting can greatly affect
battery life. If you’re using your GPS primarily in
daylight hours, you should keep the backlight time-
out at the default 15 second setting.
A bulb icon will appear on
the Satellite Page whenever
the screen backlighting is
on. The backlight will turn
on for the time selected after
every keystroke.
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R E F E R E N C E
Battery Level &
Backlighting
GPS 38 Man Rev B 7/23/98 4:32 PM Page 19