Second thought, look at the tau=1 to 10 s and you see that it first rises before the usual slope. This is the effect of averaging in the counter. I would suspect that a HP53132A is being used.
Magnus,
You're correct about averaging effects; for example, see: http://www.leapsecond.com/pages/adev-avg/ But, I think in this case it's not the measurement system that's causing it because I saw the same PRS10 hump: http://www.leapsecond.com/museum/prs10/1sigma2.gif http://www.leapsecond.com/museum/prs10/log16084v.gif http://www.leapsecond.com/museum/prs10/ What we see then would appear to be a feature of the PRS10 itself and not the measurement system. Since the PRS10 is based on a quality SC-cut OCXO, this might be an artifact of their blending the OCXO and Rb cell; i.e., it looks just like a GPSDO PLL hump, only moved two decades to the left. /tvb _______________________________________________ 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.
