Hi This is another of the many devices out there that pre-date the “modern” 180 degree phase modulation approach on WWVB. Getting one of these to run properly with the new modulation approach would take some major mods …..
Bob > On Oct 4, 2020, at 10:23 AM, Magnus Danielson <mag...@rubidium.se> wrote: > > Hi, > > I got a bit curious, so I dug up the manual (Available from Orolia that > Spectracom is part of): > > https://www.orolia.com/sites/default/files/document-files/8161_manual.pdf > > It is apparent that the reference oscillator is actually free-running > but compared to the WWVB, so you manually tune it to make the > strip-chart become more of a flat line. > > This is interesting, because the receiver locks up another 10 MHz > oscillator. > > Now, there is a 45 degree (2.1 micro) modulation on the WWVB signal, > that shows up as time-tags on the strip-chart, so it is not trivially so > that you just replace the simpler 10 MHz oscillator with the more > advanced, unless you can live with that modulation at which time it is a > fairlly trivial hack. You can be a bit more cunning to add hardware to > compensate the modulation, but I wonder if that is what is done. > > To figure it out, one has to pop the lid to figure out. That is however > not for me to do. > > Anyway, I thought the manual pointer and quick analysis would maybe be > appreciated. > > Good luck! > > Cheers, > Magnus > > On 2020-10-04 09:37, Kirk Bailey wrote: >> I ran across an interesting widget in my ongoing "find the bottom of the >> pile" task. Has a label indicating it was modified for "WWVB Continuous >> Monitored". I thought these were all for WWVB, so what does "Continuous >> Monitored" mean? See attached pic. If anyone is interested in being the >> new owner please contact me directly. >> >> Thanks, >> >> Kirk Bailey >> bai...@peak.org >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@lists.febo.com >> To unsubscribe, go to >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >> and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
