HI Hmurray, you said: >One of Said's graphs had a minor bump at roughly 2 seconds. I saw another >graph with a small spike at 2 seconds, but I don't remember where.
I thought these bumps were rather considerable, at about 1 to 2E-011, about 8 - 10x what our GPS-locked OCXO's do. >So why does that cause a bump at 2 seconds? Why not 1 second or 5 seconds? >It seems reasonable to filter out the 5 seconds, but I can't see how to >filter out 1 second without also filtering out the 2 seconds. I think I'd >expect a shoulder rather than a bump. It would fall off above 2 seconds and >blend in below 2 seconds. My question exactly. I just talked to someone who uses SRS PRS10 Rb's, and apparently SRS admitted to him that the <10s ADEV is fairly bad on the PRS10 units (without any details). It's exactly peaked at 2s, it's got to be something digital like the DAC control of the OCXO etc. Any SRS designers among this group? BTW: while I cannot prove it anymore, I am pretty confident the PRS10 did the same thing while free-running (without 1PPS input). bye, Said _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
