Operation Manual

Battery Level,
Backlighting &
Emergency Erase
REFERENCE
16
When backlighting is on, a
bulb icon will appear on
the Satellite Page.
Use the icon to determine
if backlighting is turned
on during daylight hours.
Upon activating the
Emergency Erase
Function, you will be
asked to confirm your
decision.
Battery Level Indicator
The Satellite Page also features a battery level indica-
tor, located to the left of the sky view, which displays the
strength of the unit’s batteries. The battery indicator will
not appear if the receiver is using external power.
The battery level indicator is calibrated for alka-
line batteries. Voltage differences will display
Ni-Cad and lithium batteries differently. No
other receiver functions are affected.
The GPS 48 features an internal lithium battery that
will maintain the unit’s memory when the receiver is not
running off batteries or external power.
Backlighting Bulb Icon
The GPS 48 features full-screen backlighting with
three selectable levels of brightness. To activate the
backlight, press the
B
key briefly. To increase the
brightness, repeatedly press the
B
key. The backlight
will remain on until cycled off or the backlight timeout
setting has been reached (see page 48).
Note: A bulb icon will appear on the Satellite Page
when backlighting is turned on.
Emergency Erase Function
You may erase the GPS 48’s memory in four quick
steps. This will cause all stored data to be deleted,
including: routes, waypoints, and the track log.
To erase all stored data:
1. Ensure that the GPS 48 is turned off.
2. While holding down the
M
key, hold down the
B
key to turn the unit on. A warning message will appear
with “Yes?” highlighted, and ask you to confirm your
selection.
3. If you do not wish to erase all stored data, select ‘No?’
by pressing
R and
E
to cancel the emergency
erase.
4. If you do wish to complete the emergency erase, press
E
to confirm.
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