On Sun, Mar 05, 2017 at 10:42:52PM +0000, Iain Young wrote: > That's TDF from France. Their equivalent of WWV/MSF/DCF.
> Average phase and frequency deviation is > zero over 200msec (see link above for details) This is not quite correct, since the transmitter does not just carry the time data (one bit per second, in the first 200 ms of the second), but also some more data during the next 700 ms of each second. The latter data is coded in a way which does not guarantee that the phase or frequency average is zero other than when averaging over the entire 700 ms block. Then again, I've been told that although there is a nicely defined framing format, in reality it has only ever transmitted idle frames, so in practice it's a fixed pattern which repeats every minute and thus could be cancelled for use as a frequency reference. I have a live online decoder for TDF's signal at http://websdr.ewi.utwente.nl:8901/tdf/ Regards, Pieter-Tjerk, PA3FWM _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
