195
Commands
AGE: In base station mode, this field indicates the elapsed time in seconds
between the transmission of Type 1 or 9 messages. In remote station
mode, this field indicates the age of the received messages in seconds
1 - 999
QA: The communication quality factor between base and remote. Defined
as (number of good messages received/total number of messages) x
100 total number of messages. This field applies to remote differential
mode only
000.0% to
100.0%
OFFSET The number of bits from the beginning of the RTCM byte (in case of a
bit slippage)
SETUP This subsection of the RTC response message contains status
information related to RTCM parameter settings, such as the operating
mode, the RTCM messages enabled for output, the port assigned to
receive or transmit differential corrections, etc. MODE, PORT, AUT,
SPD, STI, STH, MAX, QAF, SEQ, TYP, FRQ, BASE, and MSG fall into
this subsection
MODE Indicates the current differential mode. The default setting is OFF BAS, REM,
OFF
PORT Indicates which port (A or B) is being used for receiving or transmitting
RTCM corrections
A, B
AUT Indicates whether automatic differential mode is enabled (Y) or
disabled (N). The default setting is N. This field applies to remote
station mode only
Y, N
SPD Indicates the current rate of output for RTCM corrections in bits per
second (bps). The default output rate is 300 bps. This field applies to
base station mode only
25 - 1500
STI The differential station ID number. The ID number is a user-entered
parameter. A remote station with an ID number of 0000 can receive
corrections from any RTCM base station. Otherwise, the remote station
must be programmed with the same ID number as the base station the
in order to receive corrections from that base station. The default ID
number is 0000
0000 - 1023
STH Code number indicating the health of the base station. This code
number is a user-entered parameter. This field applies to base station
mode only
0 - 7
MAX The maximum age (seconds) of a received differential correction,
above which the remote station will not use the correction. The
maximum age setting is a user-entered parameter. The default setting
is 60 seconds. This field applies to remote station mode only
1 - 1199
QAF The multiplier value used to calculate the QA value. Always 100. This
field applies to remote station mode only
100
Table 4.118. RTC Response Format (Continued)
Parameter Description Range
G12RevD.book Page 195 Tuesday, April 2, 2002 4:33 PM
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