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C Commands Summary
MiLLennium GPSCard SW Version 4.503/4.52 Command Descriptions Manual Rev 2 81
C COMMANDS SUMMARY
ACCEPT
The ACCEPT command controls the processing of input data and is primarily used to set the GPSCard’s COM port
command interpreter for acceptance of various data formats. Each port can be controlled to allow ASCII command
processing (default), binary differential data processing, or the command interpreter can be turned off.
The command interpreter automatically distinguishes between ASCII commands and certain NovAtel-format
ASCII and binary logs without receiving an ACCEPT command.
MiLLennium GPSCards will by default interpret $RTCM59A corrections, and will interpret RTCM59 if ACCEPT
RTCM has been entered.
On certain GPSCards the ACCEPT port COMMANDS mode will by default accept, interpret, and process these
data messages: $PVAA, PVAB, $REPA, REPB, $RTCM1A, $RTCAA, $RTCM3A, $RTCM9A, $RTCM16A,
$TM1A and TM1B, without any other initialization required.
The command interpreter can process some NovAtel-format binary logs (which have a proprietary header) or
ASCII logs without receiving an ACCEPT command. Therefore, the
ACCEPT command is needed only for the
RTCA, RTCM and CMR logs. When using ACCEPT RTCM, the interpretation of the RTCM data will follow the
rules defined by the RTCMRULE command (see Chapter 4, Message Formats, Page 46). In the default processing
mode (ACCEPT port COMMANDS), input ASCII data received by the specified port will be interpreted and
processed as a valid GPSCard command. If the input data cannot be interpreted as a valid GPSCard command, an
error message will be echoed from that port (if the command MESSAGES is “ON”). When valid data is accepted
and interpreted by the port, it will be processed and acknowledged by echoing the port prompt (with the exception
of VERSION and HELP commands, which reply with data before the prompt).
In the binary differential data processing modes
, (ACCEPT port RTCA/RTCM/CMR), only the applicable data
types specified will be interpreted and processed by the specified COM port; no other data will be interpreted. It is
important to note that only one out of two COM ports can be specified to accept binary differential correction data.
Both ports cannot be set to accept differential data at the same time.
When ACCEPT port NONE is set, the specified port will be disabled from interpreting any input data. Therefore,
no commands or differential corrections will be decoded by the specified port. However, data can still be logged
out from the port, and data can be input to the port for formatting into Pass-Through logs (see Chapter 5, Page
46). If the GPSCard operator wants to time-tag non-GPS messages as a Pass-Through log, it is recommended that
the port accepting the Pass-Through data be set to “NONE”. This will prevent the accepting GPSCard COM port
from echoing error messages in response to receipt of unrecognized data. If you do not wish to disable the
command interpreter, and do want to disable message error reporting, see the MESSAGES command, Appendix
C, Page 110.
The GPSCard user can monitor the differential data link as well as the data decoding process by utilizing the
CDSA/B logs. See the CDSA/B log, Appendix D, Page 146 for more information on data link monitoring.
C COMMANDS SUMMARY