Hello guys, some time ago we talked about curious humps in the ADEV of the SRS PRS-10 Rb at around 20s intervalls. I think I may have more info on that (and as usually that raises more questions): Below is a capture of the phase offset between a PRS10 1PPS output compared to the Jackson-Labs Fury 1PPS output as measured with a 53132A. The Fury output has been shifted by about 80ns to give a nice phase offset for the 53132A to measure. Besides the underlying counter noise, there clearly is a jump of about 0.5 - 1ns visible exactly once every 15 seconds! Indicated by arrows. Could this be the counter self-calibrating? This is too regular to be co-incident. Has anyone else seen this? I don't see this on a scope when comparing two 1PPS's so I do think it's the counter. 0.078,3 us 0.078,1 us 0.078,3 us 0.078,3 us 0.078,3 us 0.078,1 us 0.078,3 us 0.078,3 us 0.078,4 us 0.078,4 us 0.078,4 us 0.079,1 us <== 0.078,3 us 0.078,3 us 0.078,3 us 0.078,1 us 0.078,3 us 0.078,1 us 0.078,1 us 0.078,1 us 0.078,0 us 0.078,0 us 0.078,1 us 0.078,1 us 0.078,1 us 0.078,0 us 0.078,9 us <== 0.078,0 us 0.078,1 us 0.078,3 us 0.078,2 us 0.078,2 us 0.078,1 us 0.078,5 us 0.078,2 us 0.078,1 us 0.078,4 us 0.078,5 us 0.078,2 us 0.078,1 us 0.078,5 us 0.078,9 us <== 0.078,2 us 0.078,4 us 0.078,2 us 0.078,4 us 0.078,0 us 0.078,4 us 0.078,2 us 0.078,4 us 0.078,2 us 0.078,2 us 0.078,5 us 0.078,3 us 0.078,3 us 0.078,3 us 0.079,0 us <== 0.078,2 us 0.078,1 us 0.078,3 us 0.078,2 us 0.078,5 us 0.078,3 us 0.078,5 us 0.078,6 us 0.078,5 us 0.078,6 us 0.078,5 us 0.078,6 us 0.078,6 us 0.078,3 us 0.079,6 us 0.078,6 us 0.078,5 us 0.078,6 us 0.078,6 us 0.078,4 us 0.078,5 us 0.078,6 us 0.078,4 us 0.078,4 us 0.078,4 us 0.078,5 us 0.078,4 us 0.078,4 us 0.078,5 us 0.079,3 us 0.078,7 us 0.078,6 us 0.078,6 us 0.078,7 us 0.078,7 us 0.078,7 us 0.078,8 us 0.078,8 us 0.078,8 us 0.078,9 us 0.078,8 us 0.078,9 us 0.078,9 us 0.078,8 us 0.079,5 us
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