My measurements show the fractional frequency deviation of the power line at my home is ~25 e-6 with a 1-second measurement and 100 loops through the calculation. I agree with Bill that a precision frequency source is not necessary.
Jeremy N6WFO On Wednesday, April 6, 2016, Bill Hawkins <[email protected]> wrote: > Phase noise? The line frequency shifts phase every time a major > electrical load is added or dropped from the power line. > > Seems to me this effect swamps every error in the measurement system. > > You are looking for parts per thousand at most. Precision GPSDO 10 MHz > is overkill. > > In my humble opinion, that is. > > Bill Hawkins > > > -----Original Message----- > From: time-nuts [mailto:[email protected] <javascript:;>] On > Behalf Of Jay > Grizzard > Sent: Wednesday, April 06, 2016 8:22 PM > To: [email protected] <javascript:;> > Subject: [time-nuts] Building a mains frequency monitor > > Since it seems to be a week for new projects on time-nuts... ;) > > So I've been wanting to set up a power line frequency monitor for a > while, and now(ish) seemed to be a good time for me. > > -------- %< ------- > > I appreciate any comments / feedback / pointers! > > -j > _______________________________________________ > > _______________________________________________ > time-nuts mailing list -- [email protected] <javascript:;> > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- Sent from Gmail Mobile _______________________________________________ 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.
