[time-nuts] WWVB Antenna revisited/Spectracom 8182

[Martin Burnicki]

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