NorthStar Navigation GM1708 961XD - Manual (Page 70)

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).