> Thanks for the link to your report, Tom. I was wondering what this 2 sec > "bump" in the ADEV was that everyone was talking about. > > The "bump" at 2 sec is just the loop tau of the main clock servo. The > physics package is performing at the (fairly typical) level of about > 2e-11/sqrt(tau). The OCXO is somewhat better than that. From Tom's plot > it looks like the OCXO is good to about 3-4e-12 on tau=0.1 to 1 second. > Because they've set the loop tau to about 1 seconds, the performance of the > OCXO is degraded as it is steered to the atoms on that timescale. > ...
Robert, Thanks for all your detailed comments. To support your points, here's an LPRO rubidium for contrast. http://www.leapsecond.com/museum/lpro/ True, there's no bump in the LPRO -- but when you compare the LPRO vs. PRS10 plots you see that the bump is evidence of a good thing for the PRS10. If nothing else everyone should view this one plot where 4 rubidiums are compared: http://www.leapsecond.com/images/4rb.gif /tvb _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
