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SECTION FOUR - Service/Maintenance
Page 60 961 INSTALLATION MANUAL Revision A
You can change the speed averaging value at any time without affecting
other navigation functions.
To change the speed averaging value:
1. At the
RECEIVER INFORMATION
screen, press the
CURSOR PAD
to
highlight the
GPS SPEED AV
field, then press the
EDIT
key.
2. Press the
CURSOR PAD
left or right to select an averaging time in
seconds of
1, 2, 5
,
10
, or
OFF
.
3. Press
ACCEPT
to make the change, or
CANCEL
to leave the option
unchanged.
Adjusting satellite elevation
You can prohibit the 961 from tracking satellites that are close to the
horizon and don’t provide high accuracy. The tracking of low satellites
during GPS calculations is used primarily for technical applications, in
which the 961 must track all visible satellites, regardless of how low
they’re situated.
In other cases, however, when high-precision fixes are necessary, the
advanced user can change this option to hide any low satellites. This
option prevents the use of low satellites as sources of GPS position infor-
mation, and avoids potential errors.
You can adjust this option to 0°, 5°, 8°, 10°, or 15°; however, Northstar rec-
ommends that you leave this option at the factory setting of 10°.
To change the satellite elevation:
1. At the
RECEIVER INFORMATION
screen, press the
CURSOR PAD
to
highlight the
MIN SAT ELEV
field, then press the
EDIT
key.
2. Press the
CURSOR PAD
left or right to select either
0
,
5
,
8
,
10
, or
15
degrees.
3. When done, press the
ACCEPT
key, or
CANCEL
to leave the option
unchanged.
Viewing the GPS software version
The software version of the GPS receiver is indicated in the
GPS RCVR
REV
field.
Setting DGPS operation
You can enable or disable the use of differential information.
1. At the
RECEIVER INFORMATION
screen, press the
CURSOR PAD
to
highlight the
DGPS SYSTEM
field, then press the
EDIT
key.
2. Press the
CURSOR PAD
left or right to select either
ON
or
OFF
.
3. When done, press the
ACCEPT
key (or
CANCEL
to leave the option
unchanged).