I may have at least the spectracoms figured out. Its a hack and at least using my homebrew wwvb psk encoder seems to work. But its not a general purpose design. It will work with the fluke 207 and HP 117s but you have to have a base spectracom to hack. Technically speaking unattractive. But that said I am waiting for the real wwvb to send bpsk again to claim any victory. Its a real challenge on the east coast as compared to folks in the mid and central west areas that have produced answers... I will also say that over the last 6 months. John and I have hacked a lot of the "solutions". They do not fare well. Regards Paul WB8TSL/1
On Wed, Sep 26, 2012 at 1:13 PM, Tom Van Baak <[email protected]> wrote: > For those of you who don't dare click on encrypted Yahoo URL's, the > original NIST link is: > > > http://www.nist.gov/pml/div688/grp40/upload/NIST-Enhanced-WWVB-Broadcast-Format-sept-2012-Radio-Station-staff.pdf > > Burt, > > My reading of the document(s) is that the new format will in fact allow > WWVB to be used as a frequency standard with even greater precision then > before, though not with unmodified legacy WWVB carrier receivers. My hope > is that one of you will produce a clever reference design for such a T&F > receiver make it available to the group. It sounds like a very fun DSP > project; one that we can all learn from. Bonus points for making it an > open-source Arduino shield. Making it work with both DCF77 and WWVB would > also be a plus. > > If nothing else, a well-documented hack for existing Spectracom and HP > WWVB receivers would be welcome. A third idea is a translator that receives > the new carrier format and re-transmits the old carrier format; that way no > mods need to be made to legacy WWVB receivers at all, regardless of age. It > would be similar to the way the G2G (GPS to GOES) translator worked. Extra > credit for adding back the 45 degree hourly phase shift. > > /tvb > > ----- Original Message ----- > From: "Burt I. Weiner" <[email protected]> > To: <[email protected]> > Sent: Wednesday, September 26, 2012 8:49 AM > Subject: [time-nuts] New WWVB format... > > > > I'm sure most of this group has seen the information put out by NIST > > regarding the changes to the WWVB format. But, for those who may not > > yet have seen this, here's a link to it: > > > > > http://f1.grp.yahoofs.com/v1/cBhjUH41xVccWM9P8EU4JqzmFNevFgDUFkRcgfLyry1Rn3HqMV5iDqYDgsd2pM1-Vq3nhF9WERTjVF_WmRjAezjU9CCrAda_8RqV/NIST-Enhanced-WWVB-Broadcast-Format.pdf > > > > The results of this change will apparently no longer allow WWVB to be > > used as a high accuracy frequency standard signal. This does not > > seem to be much of an issue considering the availability of the GPS > > signals all over the world. > > > > I use GPS as my frequency reference for my "Off-Air" broadcast > > frequency measurement service. Some broadcast stations also use GPS > > as a reference for their transmitters. I'm sometimes asked why I use > > GPS as a reference when it is not recognized by NIST as the U.S. > > Frequency Standard? Other than explaining the capabilities of GPS as > > a reference, I don't have a real answer for their specific > > question. I have publications from NIST showing the accuracies > > obtainable using GPS, but it still does not appear to be an > > "Official" U.S. Frequency Standard. So, I guess my question is, when > > will NIST officially recognize GPS as, at least an alternate, U.S. > > Frequency Standard? Have I missed something? > > > > Thanks, > > > > Burt, K6OQK > > > > Burt I. Weiner Associates > > Broadcast Technical Services > > Glendale, California U.S.A. > > [email protected] > > www.biwa.cc > > K6OQK > > > > _______________________________________________ > 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.
