Good conversation and the purpose of the remodulator is simply time. The tuning fork sets the accuracy. Granted as mentioned in the earlier email you can use a better reference but its not really a reference. Thats why the d-psk-r exists it indeed corrects the phase error but is more complex as it has to be. The d-psk-r has no problem at all feeding the data into the remodulator. Its just one of those have not gotten to it yet. Will upload pix tonight we had a big Tstorm go through. Regards Paul WB8TSL
On Mon, Jun 17, 2013 at 6:20 PM, Bob Camp <[email protected]> wrote: > Hi > > I suspect it will be a while before we see a phase locking / phase > comparing receiver chip that works with the new modulation. I'd bet on them > simply putting out the demodulated data. Since that chip just tells me what > time it is, I don't see a lot of benefit in having one. > > Even if I can't demodulate *all* the bits, I can demodulate most of the > bits. I know which slots are which. A good job of phase comparison can be > done with just the recoverable bits. I'd still rather see a definition of > the format that's not marked "preliminary" before moving down that road. > > Bob > > On Jun 17, 2013, at 6:03 PM, Chris Albertson <[email protected]> > wrote: > > > Yes the simple "re-modulator" fixes the time of day display but leaves > the > > frequency output about as good as the tuning fork crystal. > > > > I think the ONLY way to make it work 100% like new is to build a new > > receier that actually decodes the phase inversions and "knows" when the > > carier phase is flipped. Thenit can "un-flip" the carrier. There is > no > > way to predict some of the bits, you just have to detect it in real time. > > You can verify the scheme is correct because the counter will increment > > each second. So the radio can know which phase is up and which is down. > > > > Until they sell one-chip WWVB chips using the new encoding it may not be > > worth in except for those who don't trust GPS and want WWV as a backup. > > > > > > On Mon, Jun 17, 2013 at 2:08 PM, Charles P. Steinmetz < > > [email protected]> wrote: > > > >> Burt wrote: > >> > >> In a sense you could say that Paul's circuit does get the WWVB signal to > >>> the receiver - it's just a new phase stable version of the signal > signal. > >>> This way I don't have to mess with the insides of the 8170. > >>> > >> > >> Note that the 1 MHz TTL signal on the rear panel of the 8170 will not be > >> phase locked to the WWVB carrier -- it will be phase-locked to the 60 > kHz > >> carrier supplied by the re-modulator's crystal oscillator. > >> > >> One might try to injection-lock the re-modulator's crystal oscillator to > >> the WWVB carrier, but presumably the PSK would work against you here. > >> > >> Best regards, > >> > >> Charles > >> > >> > >> > >> > >> ______________________________**_________________ > >> time-nuts mailing list -- [email protected] > >> To unsubscribe, go to https://www.febo.com/cgi-bin/** > >> mailman/listinfo/time-nuts< > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > >> and follow the instructions there. > >> > > > > > > > > -- > > > > Chris Albertson > > Redondo Beach, California > > _______________________________________________ > > 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. > _______________________________________________ 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.
