NorthStar 941x User Manual

Rev. D

8 — Customizing the 941X

Page 89

(RECEIVER OPTIONS)

This setting determines how long the 941X will continue to use existing
DGPS corrections if no new corrections are being received (due to bad
weather, extreme distance from beacon, etc.). If this time period elapses
with no new DGPS data received, the 941X reverts to standard GPS navi-
gation, and displays OLD CORRECTIONS as the DGPS status.

Under normal operating conditions, this “time-out” should be set to one
or two minutes to guarantee the highest accuracy. In poor weather con-
ditions, this value can be increased to a maximum of five minutes to ig-
nore occasional outages in the beacon reception (if a minor loss of
accuracy can be tolerated). The default setting is 60 seconds.

To change the “age of correction” timeout, use the up/down cursor keys
to move the arrow at the left of the screen to DGPS DATA TIMEOUT:.
Press EDIT, then use the cursor keys to choose any value from 30 sec-
onds to five minutes, in 30-second increments.

Press ENTER to make your selection, or CLEAR to leave it unchanged.

GPS data

timeout

NOTE

A period of 30 seconds is, in many cases, too short and can

lead to intermittent problems. Generally, one minute (the de-

fault value set at the factory) provides good navigation accu-

racy, and is best left unchanged.