Hello to the group,
Thanks for interesting discussion. I found a nice plot in"Measurement,
Instrumentation, and Sensors Handbook, Second Edition", ( John G. Webster,Halit
Eren), at 42-24 page. It shows that in short term stability (tau 1 - 10 s) dual
mixer method is most sensible, in long
e further tests.
> Cheers,
> Luciano
>
>
> Da "time-nuts" time-nuts-boun...@febo.com
> A time-nuts@febo.com
> Cc
> Data Sat, 20 Jan 2018 16:14:10 -0800
> Oggetto [time-nuts] Time interval measurement vs dual mixer method
> Luciano,
>
>
A time-nuts@febo.com
Cc
Data Sat, 20 Jan 2018 16:14:10 -0800
Oggetto [time-nuts] Time interval measurement vs dual mixer method
Luciano,
I don't know of a commercial version.
As you have seen as the two signals move away from close phase
coincidence the system noise level wil
Luciano,
I don't know of a commercial version.
As you have seen as the two signals move away from close phase
coincidence the system noise level will increase.
This is because the common offset oscillator noise will only cancel when
the phases are closely matching.
This is mainly important
> Da "time-nuts" time-nuts-boun...@febo.com
> A time-nuts@febo.com
> Cc
> Data Thu, 18 Jan 2018 11:13:54 -0800
> Oggetto [time-nuts] Time interval measurement vs dual mixer method
> Luciano,
>
> Not sure what you mean by "two measures made on the
.com
Cc
Data Thu, 18 Jan 2018 11:13:54 -0800
Oggetto [time-nuts] Time interval measurement vs dual mixer method
Luciano,
Not sure what you mean by "two measures made on the same DUT never
coincide".
The plotter program takes out wraps which since your phase gain is
Luciano,
Not sure what you mean by "two measures made on the same DUT never
coincide".
The plotter program takes out wraps which since your phase gain is so
large are due to happen.
For lower Tau measurements just adjust the phase for close to equal and
run shorter plots.
These can be spliced
; http://quartzlock.com/userfiles/downloads/manuals/A7-A_&_A7-MX_Manual.pdf
> Luciano
> www.timeok.it
>
>
> Da "time-nuts" time-nuts-boun...@febo.com
> A "time-nuts" time-nuts@febo.com
> Cc
> Data Tue, 16 Jan 2018 17:58:18 +0100
>
I am working to build a small DMTD system based on Bill Riley’s paper. Bill
was kind enough to send me a package with updates. In the meantime, I tested
an AD8302 phase detector coupled to an HP voltmeter (HP3456 and HP3457), both
with the filter set. I believe the HP3456A voltmeter filter
Hi
You have to measure two different outputs to do what you describe. The PPS
measurements
are limited to > 1 x10^-10 with most counters at tau = 1 second and 2x10^-11
with some exotic
models. The mixer based stuff can get around three orders of magnitude past
that at the same
tau. Since a
Hello to the group!
Have you ever measured frequency standard (or other precision oscillator)
simultanously by time interval method (difference between 1 pps ref and 1 pps
DUT) and dual mixer method (e.q. with phase/frequency comparator)? I'm very
interested in results.
Slawek
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