hi on the 2011 or newer items, they include this link calibration data plot. <http://www.rdrelectronics.com/skip/feb/EC0329.gif>
i received a printed one with the unit. dave On Sat, Sep 2, 2017 at 6:55 AM, Mark Sims <hol...@hotmail.com> wrote: > The data that RDR showed was from the SA22.c "w" command. I think he was > just using a terminal program. > > Attached is a screen dump of Heather doing a software disciplining > algorithm on a SA22.c (using the dev board as an interface). The 1PPS > reference that I am using is the nosiest one that I had handy (LEA 5T, > indoor antenna, second 1PPS output... it has over +/- 66 ns of jitter). > > Heather can also calibrate the SA22 / X72 frequency output. You apply a > 1PPS input, enter &a and a sample count (default 1800 seconds). It then > calculates the drift rate from a linear regression trend line and sets the > device DDS tuning word. The resolution of the DDS in the device is around > 2.5E-12 / count. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > -- Dave Mallery, K5EN (ubuntu linux 16-10) PO Box 15 Ophir, OR 97464 linux counter #64628 (since 1997) _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
