NorthStar 961X, Operation And Reference Manual

Page: 333 / 374

Chapter 14 - Service and Maintenance Functions
961 Operations and Reference Manual Rev. D Page 14-5
NOTE:
If you’re viewing and editing information on the
RECEIVER
INFORMATION
screen, and you press one of the five function
keys to view other data, the 961 immediately cancels your
edit-in-progress so that you can view the data requested by your
function keypress. To resume editing at the
RECEIVER INFOR-
MATION
screen, you must return to that screen and re-enter the
data you lost when you pressed the function key. To purposely can-
cel an edit-in-progress, however, you’d normally press the
CAN-
CEL
key.
Changing GPS speed averaging value
When you aren’t using DGPS or you’re out of range, you may
notice that the SOG readings obtained from the GPS satellite
system are slightly erratic, varying by up to several knots. The
961’s
GPS SPEED AV
function often can improve the steadi-
ness of these readings, although you’ll see a slightly longer dis-
play-reaction time when the speed changes.
With GPS speed averaging, you can select the time over which
the 961 averages your speed, with available values between
one and ten seconds. A longer averaging time is useful at
lower speeds when you require the highest accuracy. With
this high degree of accuracy, you’ll see a steady display of
your speed that’s slow to change. A shorter averaging time,
however, provides less accuracy and a quicker-changing dis-
play of your speed.
You also can turn off speed averaging completely for the
quickest possible display-reaction time.
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
CUR-
SOR 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.