I'm curious if any one has any specific information about how TOD data could be sent via the native T1 data frames (as opposed to a signal which another piece of equipment could use as a clock source.)
I've never seen any specs for sending TOD information via the ESF Data Link or any other means, but that doesn't mean a spec doesn't exist somewhere. --- On Mon, 11/21/11, Charles P. Steinmetz <charles_steinm...@lavabit.com> wrote: > From: Charles P. Steinmetz <charles_steinm...@lavabit.com> > Subject: Re: [time-nuts] Symmetricom TimeSource 2700 > To: "Discussion of precise time and frequency measurement" > <time-nuts@febo.com> > Received: Monday, November 21, 2011, 6:13 PM > Kevin wrote: > > > The PPS in/out of the PRS10 do not appear to connected > to the TS2700 > > logic board. > > I believe the TS2700 does not take PPS timing from the > PRS10, nor does it discipline the PRS10. It does, > however, keep tabs on the frequency of the PRS10, and I > believe it uses this information to generate corrections to > the TS2700 frequency and timing outputs during holdover -- > that is, I believe it does not just pass through the PRS10 > 10 MHz signal and derive other timing signals from it during > holdover, but applies corrections that it has learned from > its monitoring. See the block diagram at p. 19 of the > TS2700 manual and text at p. 14. > > > I'm not looking for a > > PPS that's just a frequency/period reference, but > instead places the PPS > > at the GPS PPS position. Perhaps the TS2700 is already > do it, but so far, > > I've only seed evidence that it's a frequency > reference. > > The whole point of the TS2700 is to be a Stratum 1 time > source. See the TS2700 manual at pp. 14 and 113. > The TS2700 clearly sends TOD information -- pretty much > every BTMon window contains a TOD display. > > Because the TS2700 was designed for telecommunications > central office applications, the main outputs are two T1s, > "Span A" and "Span B," rather than computing protocols that > would be more familiar to most techies. To access the > TOD and timing information, I think you would need to decode > the T1 data stream. It may be available at the "Craft" > output, as well -- the TOD data definitely is, but I do not > know about the precision timing data. (For those who > are curious, "Craft" is an ancient telecommunications > term.) > > Best regards, > > Charles > > > > > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.