Hello, I am new to the "club". I have a GPSDO purchased on eBay and am waiting for an "FA-3 3G" Frequency Counter to arrive from China. The GPSDO has been running for weeks by now and the display shows frequencies in the range 9999999.9997Hz - 10000000.0003Hz. Is this normal and acceptable? There is a RS-232 connector on the GPSDO and a USB connector on the Counter. Question: Is there a way to record/plot the GPSDO frequency stability, maybe with "TimeLab"? I wonder if it's possible to read-out and save that data from the GPSDO and/or the "FA-3 3G" counter. Unfortunately I couldn't find a manual for the "FA-3 3G" on the internet. Any comment/help is much appreciated. Regards, Robert

hello Robert, Although this is somewhat a "shot in the dark" you might want to try the Lady Heather program to see if this GPSDO is compatible with it. You can find LH (common shorthand) at http://www.ke5fx.com/heather/readme.htm If this were my GPSDO, I would first have a look inside, maybe it uses a surplus module, not uncommon for GPSDO from China. best, Wilko > On 8 May 2025, at 20:02, Robert Diamant via time-nuts <time-nuts@lists.febo.com> wrote: > >  Hello, > I am new to the "club". > I have a GPSDO purchased on eBay and am waiting for an "FA-3 3G" Frequency > Counter to arrive from China. > The GPSDO has been running for weeks by now and the display shows > frequencies in the range 9999999.9997Hz - 10000000.0003Hz. > Is this normal and acceptable? > > There is a RS-232 connector on the GPSDO and a USB connector on the Counter. > Question: Is there a way to record/plot the GPSDO frequency stability, > maybe with "TimeLab"? > I wonder if it's possible to read-out and save that data from the GPSDO > and/or the "FA-3 3G" counter. > Unfortunately I couldn't find a manual for the "FA-3 3G" on the internet. > Any comment/help is much appreciated. > Regards, > Robert > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com