[time-nuts] WWVB Antenna revisited/Spectracom 8182

[paul swed]

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 <
martin.burnicki at burnicki.net> 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
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