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Acutime 2000 Synchronization Kit User Guide C-3
C NMEA 0183
Dn Each message contains multiple data fields (Dn),
which are delimited by commas.
“*” The asterisk serves as a checksum delimiter.
CS The checksum field contains two ASCII characters
which indicate the hexadecimal value of the
checksum.
[CR][LF] The carriage return [CR] and line feed [LF]
combination terminate the message.
NMEA 0183 messages vary in length, but each message is limited to
79 characters or less. This length limitation excludes the “$” and the
[CR][LF]. The data field block, including delimiters, is limited to 74
characters or less.