182 G12 OEM Board & Sensor Reference Manual
$PASHQ,TCM,[c1]
This command allows you to query 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 4.107 defines the response message.
Typical TCM message:
$PASHR,TCM,1,31,0000,0,2644.0,100,01*28
Table 4.107. $PASHS,NME,TCM Response Structure
Parameter Description Range
d1 Message synchronization indicator:
• 0 - synchronization between base and
remote not established or lost.
• 1 - synchronization established between
base and remote
0, 1
d2 RTCM message type received by the remote 1, 2, 3, 6, 9, 16
d3 Base station ID number 0 - 1023
d4 Base station health indicator
f5 Modified Z count (seconds; variable length number)
with range between 0 and 3599.4 seconds
0 - 3599.4D
d6 Message reception quality indicator. Message
reception quality is defined as follows:
(Number of good measurements / total number of
measurements)*100
000 - 100
d7 Age of the received correction messages 0 - 99
*hh Checksum 2-character hex
G12RevD.book Page 182 Tuesday, April 2, 2002 4:33 PM
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