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Screen Backlighting
The GPS 120XL features three levels of backlighting.
Activate the backlight by pressing the POWER key
briefly. Each press of the button advances the backlight-
ing to the next level and then turns it off. Backlighting
will remain on until turned off. Note: a bulb icon will
appear on the Satellite Page when backlighting is on.
Position Page
The GPS 120XL’s Position Page shows you where
you are, the direction you are heading, and your speed,
and is most useful when you are traveling without an
active destination waypoint. A compass tape at the top
of the page displays your cardinal heading (while mov-
ing), with current track and speed over the ground indi-
cated below. The rest of the page shows your present
position in three dimensions (latitude, longitude and
altitude). The units of measure for speed, distance, posi-
tion and altitude are all user-selectable through the nav-
igation setup menu (see pages 48-50). The 12/24 hour
clock and time offset options are available from the sys-
tem setup menu (see page 47).
Trip Odometer
The Position Page also features a resettable trip
odometer to measure your total distance traveled.
To reset the trip odometer:
1. Press the
D
key until the trip field is highlighted.
2. Press
F
,
followed by
L
.
3. Press
F
to finish.
Altitude Display
When the GPS 120XL is acquiring satellites or navi-
gating in the 2D mode, the last known altitude will be
used to compute your position. If the altitude shown is
off by several hundred feet, you can manually enter
your altitude for greater accuracy. Note that GPS alti-
tudes can fluxuate due to errors.
1. Press the
D
key until the altitude field is highlighted
and press
F
.
2. Use the arrow keypad to enter the altitude and press
F
.
Backlighting &
Position Page
REFERENCE
18
The speed and track dis-
played on the Position Page
may fluxuate at slow speeds
(or when you’re standing
still) because of position
errors caused by Selective
Availability.
To reset the trip odometer,
highlight the trip field and
press ENTER. Use the
LEFT arrow key to clear the
distance field, and press
ENTER to confirm.
120XL Man RevB 7/10/98 10:55 AM Page 18