Symbols and delimiters, Checksum values – Trimble Outdoors 132 User Manual
Page 105
DSM 132/132RS Receiver User Guide 1 0 5
NMEA-0183 Messages C
Table C.3 explains the fields in the ZDA example shown in
Figure C.5.
Fields 5 and 6 together give the total offset. Local time is 5 hours and
15 minutes earlier than
GMT
.
C6.1
Symbols and delimiters
All messages follow the
NMEA-0183
Version 2.1 format, in which
symbols and delimiters identify or separate the message data.
NMEA-0183
messages always:
•
begin with a dollar sign (
$
) followed by a talker ID code (for
example GP) and a message
ID
code (for example, ZDA)
•
end with a carriage return and line feed
C6.2
Checksum values
Newer Trimble receivers conform to the
NMEA-0183
Version 2.1
format, in which checksums are mandatory for all messages.
Table C.3
Fields in an NMEA-0183 message — ZDA
Field
Data
Description
1
220320.0
Time in
UTC
2
26
Day (01 to 31)
3
06
Month (01 to 12)
4
1997
Year
5
-5
Local time zone offset from
GMT
(in hours
00 to ±13 hours)
6
15
Local time zone offset from
GMT
(in minutes)