I cant remember the detail now but my converstaion with a BBC engineer at the NPL meeting a few years back suggested along the lines of "yes there would be a stable frequency available on a digital TV signal but no it would not be related (tracable) to any given standard because it didnt need to be."
It may be a case of measure it and see !! TVADEV ?? :-)) Alan G3NYK ----- Original Message ----- From: "Hal Murray" <hmur...@megapathdsl.net> To: "Discussion of precise time and frequency measurement" <time-nuts@febo.com> Sent: Monday, November 23, 2009 12:00 AM Subject: Re: [time-nuts] Alternate frequency sources - second opinions > > > I'm not sure, but when satellite links go down, the picture freezes. > > That implies a frame store which is likely bad news for timing. > > I'm not sure that "bad news" is the right term. > > If you have frame buffers (and they were a big breakthrough many years ago), > then you get timing from the output side of the frame buffer rather than the > input side. The output side is your local TV station. If they have a good > clock, you win. If not, oh well, maybe another station will be better. > > > > -- > These are my opinions, not necessarily my employer's. I hate spam. > > > > > _______________________________________________ > 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.