Filter
Top Products
Acutime 2000 Synchronization Kit User Guide A-33
A Trimble Standard Interface Protocol
Alternatively, in the integer second mode, the most recent
measurements are projected to next integer second, and the
solution is then valid at this time. The benefit of this mode is
the standard fix time and a 1 Hz output rate. The drawbacks
are that some measurement projection is performed and that
the fix may be slightly older than with the default option.
This mode also conforms to the output rate of NMEA.
• Output Time - This bit defines whether fixes are
automatically output when computed or only sent in response
to a packet 37 request. The default is automatic output.
• Synchronized Measurements - This bit controls whether all
satellite range measurements are required to have the same
time tag. The default is OFF. Slightly older measurements are
tolerated (on the order of 3-5 seconds) to provide solutions
when obscurations make it impossible to obtain exactly
concurrent measurements from each satellite.
When this bit is ON, all measurements are required to have
the same time tag. This mode is used only when the user
application requires all satellite measurements to be identical
to the position time tag. If a satellite that is in the selected set
for the solution is lost, then no fix will be made until a new
selection is made.
The synchronized measurement mode combined with the
minimized projection timing mode (see next paragraph)
allows absolutely no measurement projection. However,
obscurations may reduce the fix density when there are
limited satellites. Use this mode cautiously.