NorthStar MX500 Operator's & Installation Manual page 127

Configuration
DGPS Mode:
Max Age -sets the maximum time limit that the last received DGPS
Message 16 Alarm - sets the alarm to On or Off if a reference station
Alarm For No Corrections - sets the alarm to on or off if DGPS correc-
Version 3.0
Auto - sets the receiver to automatic DGPS or GPS modes. This is
the default setting. If DGPS corrections are being received and
their age is less than the Max Age limit, the receiver will oper-
ate in DGPS mode (assuming you are receiving corrections for
enough satellites to operate in DGPS mode). Otherwise, the
receiver operates in GPS positioning mode.
The traffic light will be green when it is in DGPS mode.
When it drops to GPS mode, a DGPS symbol will be displayed
(indicating Non Differential GPS mode), and the yellow and
green traffic light will be on.
Use this mode when maximum navigation coverage is more
important than accuracy. Reverting to GPS mode will degrade
the overall navigation results, but it is better than no naviga-
tion results at all in most circumstances.
DGPS Only - sets the receiver to only provide DGPS position
fixes. If corrections are being received and their age is less
than the Max Age limit, the receiver will operate in DGPS mode
(assuming there are enough corrections to operate in DGPS
mode). Otherwise, the receiver will not provide any position fix
at all.
Use this mode when accuracy is more important than maximum
navigation coverage. When operating in this mode, you should
also set the Max Age to 30 seconds.
Off - sets the receiver to operate in GPS mode only.
correction will be applied to the satellite range measure-
ment in the receiver. The default setting is 60 seconds. The
receiver will accept values from 10 to 999 seconds. Due to the
removal of the S/A dithering from the satellite signal, you may
now use values of 300 seconds in the maximum age and still be
very accurate.
text message is received. The default setting is Yes. Received
Type 16 messages can be displayed on the GPS7 screen, re-
gardless of the alarm setting.
tions are not received within the Max Age. The default setting
Operator's Manual
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