No doubt! But I'm trying to remain as inexpensive as possible. That it might be possie to get 5ms (300 carrier periods!) from an off-the-shelf consumer-grade component not designed for accuracy is pretty cool IMO.
On 7 Feb 2018 14:31, "Bob kb8tq" <kb...@n1k.org> wrote: Hi Back in the era of VLF disciplined oscillators, carrier phase was the preferred approach. Getting that to work with 100% AM modulation took some effort …. Bob > On Feb 7, 2018, at 2:13 AM, Poul-Henning Kamp <p...@phk.freebsd.dk> wrote: > > -------- > In message <CAGJ4F+697SyXwm3yWG-XczN4zF7r2RAmXzAcEm=dhaqBJc_ n...@mail.gmail.com>, "Deirdre O'Byrne" writes: > >> MSF disciplined oscillator?! I don't trust these receivers to any better >> than about the 20ms mark, so such a disciplined oscillator would have quite >> a long integration time! > > It's actually more complicated and better than that. > > The low-pass filter dominates, so the falling flank at second N > depends on the pulsewidth at second N-1. > > I can't remember the numbers I got when I "sorted" DCF77 pulses depending > on the previous pulse being short or long, but it was a fair bit better > than 20ms. > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > p...@freebsd.org | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence. > _______________________________________________ > 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.