Martin NIST did preserve the AM data so that the cheapy clocks typically worked. But phase tracking receivers don't. Regards Paul WB8TSL
On Fri, Mar 23, 2018 at 5:35 AM, Martin Burnicki < [email protected]> wrote: > paul swed write: > > I'll add to the comments the spectracoms are phase tracking receivers and > > do not work on the new BPSK signal. > > When the German PTB made effort to increase the accuracy and reliability > of the DCF77 long wave receiver in the 1980s, they implemented thus in a > way that old receivers of the original AM modulation would not be affected: > https://www.ptb.de/cms/en/ptb/fachabteilungen/abt4/fb-44/ag- > 442/dissemination-of-legal-time/dcf77/dcf77-phase-modulation.html > > If I remember correctly then there were some discussions with folks a > NIST when they were going to introduce their new modulation scheme, but > even though the guys at NIST knew that their approach would break > existing receivers, they implemented it anyway that way, even though > other (compatible) ways would have been available. :-( > > Martin > _______________________________________________ > 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. > _______________________________________________ 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.
