ashtech DG16 Reference Manual page 296

$PASHQ,TCM,[c1]
This command queries the TCM message, where c1 is the optional port designator
for the output of the response. If a port is not specified, the receiver sends the
response to the current port.
$PASHR,TCM
The TCM message contains status information for the remote differential station
as well as information on the transmitting base station, such as the base station ID
number, base station health, remote station synchronization status, the RTCM
message type being received, a quality indicator for message reception, and age
of correction. the response is output in the format:
$PASHS,NME,TCM,d1,d2,d3,d4,f5,d6,d7*hh
Table 8.48 outlines the response message.
Table 8.48. $PASHS,NME,TCM Response Structure
Parameter
d1
d2
d3
d4
f5
d6
d7
*hh
276
Description
Message synchronization indicator:
• 0—synchronization between base and remote
not established or lost.
• 1—synchronization established between base
and remote
RTCM message type received by the remote
Base station ID number
Base station health indicator
• 0—UDRE scale factor 1
• 1—UDRE scale factor 0.75
• 2—UDRE scale factor 0.5
• 3—UDRE scale factor 0.3
• 4—UDRE scale factor 0.2
• 5—UDRE scale factor 0.1
• 6—Reference Station transmission not monitored
• 7—Reference Station not working
Modified Z count (seconds; variable length number) in
seconds
Message reception quality indicator. Message reception
quality is defined as follows:
(Number of good measurements / total number of
measurements)*100
Age of the received correction messages
Checksum
DG14 and DG16 Board & Sensor Reference Manual
Range
0, 1
1, 2, 3, 6, 9, 16
0 to 1023
0 to 7
0 to 3599.4
000 to 100
0 to 99
2-character hex