Hi Mike -- Tom's plots at http://www.leapsecond.com/pages/z3801a-osc/ show 13 Z3801As running in unlocked mode, measured against one of his most excellent references. So I think that plot shows what you're looking for. I was just trying to show what you get when you are running in the normal locked condition (my units almost never go into holdover, so I was more interested in what the normal behavior was).
One thing that's not clear from Tom's page, though, is whether the units were in "smart" holdover mode (ie, no GPS signal but the CPU still steering based on its learned aging curve) or truly freestanding with no EFC being applied. John ---- Mike Feher said the following on 01/25/2008 10:19 AM: > John - > > Maybe I am not totally awake yet or have too many other things on my mind, > but, I do not understand your plots. I assume the measurements were made > with one Z3801A being the DUT and the other the reference, and, both locked > to GPS at the time. While it is probably available someplace, maybe on your > page or on TVB's, I would really like to see the comparison of a locked > Z3801A to an unlocked one with the same set of information that you > provided. Also maybe the plots could be superimposed for easier comparison. > I would recommend that you use the better of the two Z3801As in an unlocked > condition as reference should you decide to go through with the exercise. > Thanks & 73 - Mike > > > > Mike B. Feher, N4FS > 89 Arnold Blvd. > Howell, NJ, 07731 > 732-886-5960 > > > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of John Ackermann N8UR > Sent: Friday, January 25, 2008 9:06 AM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] Z3801A performance plots > > Sorry, I mistyped. Try this: > > http://www.febo.com/pages/oscillators/z3801a/ > > John > ---- > Mike Feher said the following on 01/25/2008 08:41 AM: >> John - >> >> Your link did not work for me. Thanks - Mike >> >> >> >> Mike B. Feher, N4FS >> 89 Arnold Blvd. >> Howell, NJ, 07731 >> 732-886-5960 >> >> > > _______________________________________________ > 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. > > _______________________________________________ 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.
