Hey again, thanks for the feedback so far. From your messages I realize I should provide you with more information. I would like to adjust the real time clock frequency of the destination system. In the current setup the reference system has temperature independent oscillators with a known drift (up to +/-2ppm) and the destination system has standard computer oscillators (up to +/-100ppm). The reference system supplies timestamps, however, they do not reference absolute time points but time points that are relative to the start of the system. The destination's clock is synchronized via NTP over the Internet and as mentioned incorrectly before, the destination system needs the absolute time. In the current implementation, the timestamps are already sent from the reference to the destination system for other purposes and may be used for clock synchronization. In a first approach (1), when the connection to the NTP servers drops, the destination's clock should be adjusted based on the reference system's timestamps (but with the absolute time). In a second approach (2), the NTP algorithm filter and adjustment algorithms should be improved based on the reference system's timestamps. The logic has to be implemented on the destination system using the timestamps from the reference system. Do you think that a refclock driver for (1) sufficient? And is there anything like (2) already implemented or is a rewrite of NTP required? Do you have any general ideas on either (1) or (2) or another one? PTP looks good but NTP is a necessessity.
Regards Maximilian Maximilian Brehm schrieb: > Hey NTP community, > > I need to synchronize only the frequency of a > destination systems based on the frequency of a reference system in the > same network. This is because the reference system does not supply > timestamps and they are not important for the destination system. So, I > would say I need (a) only frequency and no clock adjustments for the > destination system and (b) a method to synchronize clocks via a local > network. > > Are there ways to achieve this using NTP that are implemented > or may be implemented? If yes, can you recommend me starting points for > either way? > > Thanks > > Maximilian Brehm > _______________________________________________ > questions mailing list > [email protected] > http://lists.ntp.org/listinfo/questions _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
