Safran VersaSync - System Time Message Format; Configure NTP

2.8.10.1 System Time Message Format
This message contains the time when the next 1PPS discrete will occur. It is sent
once per second prior to the 1PPS discrete.
Table 2-6:
System Time Message format
Word Byte 3 Byte 2 Byte 1 Byte 0
1 Msg ID
2 Msg Size
3 Seconds
4 nSec
5 EOM
Table 2-7:
System Time Message field descriptions
Data
Name
Data Description Range Resolution Units
Message
ID
UID of the message; pro-
grammable
Unsigned 32
bit integer
1 n/a
Message
Size
Total message size in bytes Unsigned 32
bit integer
1 Bytes
Seconds Seconds since epoch
(00:00:00 Jan 1, 1970 UTC)
Unsigned 32
bit integer
1 Seconds
NSec NSec within the current
second
Unsigned 32
bit integer
1 nsec
EOM End-of-message -1 1 n/a
It is also possible to use the System Time Message to send NMEA over UDP. For
more information about this functionality, see the NMEA over UDP App Note.
2.8.11 Configure NTP
Network Time Protocol (NTP) and Simple Network Time Protocol (SNTP) are cli-
ent- server protocols that are used to synchronize time on IP networks. NTP
provides greater accuracy and better error checking capabilities than SNTP does,
but requires more resources.
For many applications, it is not necessary to modify the NTP factory default con-
figuration settings. It is possible, however, to change most of the settings in order
to support specific NTP applications which may require a non- standard con-
figuration:
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CHAPTER 2 • VersaSync User Manual Rev. 12
2.8 Configuring Network Settings