Lassen SQ, Reference Manual

Page: 136 / 196

A Trimble Standard Interface Protocol (TSIP)
1 2 2 Lassen SQ GPS Receiver
A.15.39
Report Packet 0x7B
This packet provides the NMEA settings and interval.
A.15.40
Report Packet 0x82 - Differential Position Fix Mode
This packet provides the differential position fix mode of the receiver.
This packet contains only one data byte to specify the mode. The
packet is sent in response to Packet
0x
62 and whenever a satellite
selection is made and the mode is Auto GPS / DGPS (modes 2 and 3).
The receiver switches automatically between modes 2 and 3 based on
the availability of differential corrections for a constellation which
meets all other masks. If such a constellation is not available, then the
receiver stays in its current automatic mode (2 or 3), and does not do
position solutions.
Valid modes are:
Mode 0 Differential off (Manual GPS) — The receiver does
position solutions without differential corrections, even if
the differential corrections are available.
Mode 1 Differential on (Manual DGPS) — The receiver only does
position solutions if valid differential correction data are
available.
Mode 2 Differential currently off (Auto DGPS) — The receiver is
not receiving differential correction data for all satellites
in constellation which meets all other masks, and is doing
non-differential position solutions.
Mode 3 Differential currently on (Auto DGPS) — The receiver is
receiving differential correction data for all satellites in a
constellation which meets all other masks, and is doing
differential position solutions.
Note – The Lassen SQ GPS receiver sends this packet automatically
after every position fix except when in Mode 0.