[time-nuts] Z3801A performance plots

Mike Feher mfeher at eozinc.com
Fri Jan 25 11:03:15 EST 2008

John -

That is great. 4 days will be over before we know it. 73 - Mike

Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of John Ackermann N8UR
Sent: Friday, January 25, 2008 10:58 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Z3801A performance plots

Mike, you did inspire me to do the follow-on experiment.  I'm now
measuring the two units again, but this time with the antenna on unit 2
(the not-as-good one) disconnected just at the start of the run.  It'll
take about 4 days to gather the same data as the other plots, so be
patient. :-)


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
> to GPS at the time. While it is probably available someplace, maybe on
> 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
> I would recommend that you use the better of the two Z3801As in an
> condition as reference should you decide to go through with the exercise.
> Thanks & 73 - Mike

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