I checked out 162KHz at 2000 local and now have what I believe to be TDF using the 67 ft vertical antenna. I am reading -82 dbm near Boston in the US or 3400 miles. A comfortable signal at least in the winter. As a comparison wwvb at 60 KHz is -77dbm some 2000 miles but also not at a 2 MW power level like TDF.
Since I had not heard TDF before I listened to Pieters online SDR radio to see what to listen for. The easiest point to notice is the 59 second phase. Its funny that also seconds 0-10 should be the same phase but it did not seem to be true. Unless what I am hearing is the local oscillator of Pieters SDR radio. So thanks for sharing some new knowledge with Time-nuts. Regards Paul WB8TSL On Mon, Mar 6, 2017 at 1:46 PM, Pieter-Tjerk de Boer <ptdeb...@cs.utwente.nl > wrote: > > 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 -- 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.