Screen Contrast
The GPS 48 has adjustable screen contrast con-
trolled by an on-screen bar scale.
To set the screen contrast:
1. Highlight the ‘CONTRAST’ field, and press
E
.
2. Adjust the bar scale to the desired contrast, and press
E
.
Note: The screen contrast can also be adjusted by
pressing the rocker keypad while on the Satellite Page
(see pg. 11).
Backlighting Timer
The screen backlight timer is adjustable for 15, 30,
60, 120, or 240 seconds. The timer also may be set to
the ‘Stay On’ setting for continuous use. Whenever
backlighting is on, a bulb icon will appear on the
Satellite Page.
To set the backlight timer:
1. Highlight the ‘light timeout’ field, and press
E
.
2. Select the desired setting, and press
E
.
3. To turn lighting on and off, press the
B
briefly.
Tone Setting
The GPS 48 allows you to choose a tone for mes-
sages only, messages and keystrokes, or no tone setting
at all.
To set the tone:
1. Highlight the ‘TONE’ field and press the
E
key.
2. Select the desired setting and press
E
.
Screen Contrast,
Backlight Timer,
Tone
REFERENCE
48
The “Stay On” setting will
keep your backlighting on
continuously. However,
this will significantly
reduce your battery life.
The tone setting has three
options to customize it to
your preference.
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