On Wednesday, February 24, 2016 12:55:42 AM Enrico Bellotti wrote: > Hello to all, > > first of all, thank you for the great and useful work that the time-nuts > have done over the years. > > I have finally been able to gather all my counters (HP5335A, HP51131A, > HP5370A, HP5370B #1, HP5370B #2) and try to do some "simple" measurements. > > I have started testing and comparing the instruments I have available using > the approach that was discussed a while ago on the list and also outlined > by John Ackermann (http://www.febo.com/pages/hp5370b/). Specifically, the > Adev for a time interval measurement on a (90ft of) RG58A/U cable. > > I have attached a PDF file with the results and some additional details of > the test setup. > > From what I have understood the Adev at one second is related to the > counter resolution. The results I have obtained seem to be reasonable > except for HP5370B #2. This instrument seems to be marginal at best. Does > anybody know if the measured value for HP5370B #2 is a symptom of a > multifunction or simple need for calibration? > > Thank you for any comments/suggestions/corrections you may have. > > Best. > Enrico Try repeating the test with a low noise external reference/If that doesn't improve the results try realigning the filters etc in the 10-200MHz multiplier.
Bruce _______________________________________________ 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.
