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To change the DOP/EPE field:
1. Press
N
and rotate
O
to display the satellite status page.
2. If the desired field (EPE or DOP) is not displayed, press
C
twice.
3. Use
K
to change between ‘epe’ and ‘dop’. Press
C
to finish.
The receiver status field, located at the top left of the page, can display the fol-
lowing messages under various conditions:
Search Sky - The GNC 250XL is searching the sky for visible satellites.
You will be informed with the message ‘Searching the Sky’.
Acquiring - The GNC 250XL is acquiring satellites for navigation.
2D Nav - The GNC 250XL is in 2D navigation mode. If your installa-
tion does not include an altitude serializer, you must enter
the altitude manually (see page 2). ‘2D Dif Nav’ will appear
when you are receiving DGPS corrections in 2D mode.
3D Nav - The GNC 250XL is in 3D navigation mode and will compute
altitude. ‘3D Dif Nav’ will appear when you are receiving
DGPS corrections in 3D mode.
Simulator - The GNC 250XL is in simulator mode, which should only be
used for practice and trip planning. Never use simulator
mode for actual navigation.
Poor Cvrg - The GNC 250XL cannot acquire sufficient satellites for navi-
gation.
Need Alt - The GNC 250XL needs altitude in order to start/continue
navigation. Go to the position page and enter the altitude.
Not Usable - The GNC 250XL is unusable due to incorrect initialization or
abnormal satellite conditions. Turn the unit off and on again.
Autolocate - The GNC 250XL is looking for any satellite whose almanac
has been collected. This process can take up to five minutes.
21
‘Searching the Sky’ for satellites. No satellite
almanac data exists in the GNC 250XL. It must
be recollected from the first available satellite.
‘Acquiring’ satellites for navigation. In this case,
the satellites are being received, but the data is
still being collected before a position can be
determined.
SECTION
1
NAV KEY
Receiver
Status Field
250xl manual 2 7/17/98 1:27 PM Page 21