Hi Said, Yes, it was quite a bit of work. Thanks for noticing.
My goal is to extend the plots out well past a day but as you know to get good statistics out there takes a week or two of data for each run. Or I can switch measurement systems and try to do several in parallel. Theoretically just 3 or 4 days of data is sufficient to compute the ADEV(tau 1 day) but the error bars are too wide that way. When comparing different GPSDO, one needs to keep the error bars pretty small in order to be fair. That's why the plot stops at tau 40k. Anyway, once I collect enough data, yes, adding a holdover test is the next thing. Several of these GPSDO have such low drift as it is that it could take a week to accurately measure it. /tvb ----- Original Message ----- From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] ; [email protected] Sent: Tuesday, February 12, 2008 4:13 PM Subject: Re: [time-nuts] GPS Locked and Unlocked Performance Comparison Hello Tom, excellent web-page! That looks like a lot of work was done. Would you have data for 24 hour hold-over performance (86400s ADEV) for these units? thanks, bye, Said In a message dated 2/11/2008 21:17:49 Pacific Standard Time, [EMAIL PROTECTED] writes: Sifting through old data, in addition to recent measurements made in the past few months, I have 4 very interesting plots of GPSDO performance. The goal was to see real-life plots of disciplining in action by contrasting free (unlocked) vs. GPS-locked performance as compared with my 10 MHz house reference. The four GPSDO measured so far are: Z3801A, Fury, Thunderbolt, and Miller. http://www.leapsecond.com/pages/gpsdo/ Comments & questions welcome. I hope to measure quite a few more this year. Contact me offline if you want your favorite one included in the list. Note that I'm not necessarily looking for the best GPSDO; instead, for this page at least, the more variety the better. /tvb _______________________________________________ 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.
