Hi At least from what I've seen, the Pendulum's seem to work a bit better than the other counters you mention. That may simply be a function of their being designed much more recently. It could also be the issue of comparing beat up stuff on the bench to brand new stuff on the bench. The CNT-81 is rated to have a much better single shot time resolution than the others.
Yes I realize that in no way addresses the question you asked. MDEV and ADEV measure slightly different things. Depending on what you are looking for MDEV may give you better insight. Bob On Feb 5, 2010, at 10:59 PM, Pete Rawson wrote: > Efforts are underway to develop a low cost DMTD apparatus with > demonstrated stability measurements of 1E-13 in 1s. It seems that > existing TI counters can reach this goal in 10s. (using MDEV estimate > or 100+s. using ADEV estimate). The question is; does the MDEV tool > provide an appropriate measure of stability in this time range, or is > the ADEV estimate a more correct answer? > > The TI performance I'm referring to is the 20-25 ps, single shot TI, > typical for theHP5370A/B, the SR620 or the CNT81/91. I have data > from my CNT81showing MDEV < 1E-13 in 10s. and I believe the > other counters behave similarly. > > I would appreciate any comments or observations on this topic. > My motivation is to discover the simplest scheme for making > stability measurements at this performance level; this is NOT > even close to the state-of-the-art, but can still be useful. > > Pete Rawson > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
