TrueTime IRIG NTS-100, Руководство пользователя

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NTP ver. 3.0 UDP Port 123 RFC1305**
SNTP UDP Port 123 RFC1361
TIME UDP Port 37 RFC868
1.10.2 Refer to Appendices A and B of this manual for detailed information regarding these
protocols as implemented by the NTS-100.
** The NTS-100 does not implement the “authenticator field” of the NTP packet as
described in Appendix C of RFC1305.
1.11 NETWORK TIME PROTOCOL SYNCHRONIZATION SPECIFICATIONS
1.11.1 The NTS-100 hardware is designed specifically to implement the NTP server function.
As such it was carefully designed to operate with the TrueTime Mark III real time
operating system to minimize the unknown latencies in timestamping the received and
transmitted NTP packets. The NTP packet timestamp accuracy specifications are:
Received Timestamp ±10 µs, relative to synchronization source
Transmitted Timestamp ±10 µs, relative to synchronization source
1.11.2 At these levels of accuracy, the realizable NTP synchronization accuracy of any client
host is determined by the quality of the synchronization source and the repeatability of
the network and client delays,
not by the NTS-100 timestamp uncertainty.