[time-nuts] PRS10 MDEV
CBURFORD1 at austin.rr.com
Sun Oct 14 23:07:32 EDT 2018
This is just a free running PRS10 wired to a TAPR TICC, I thought that
I would run some stand alone tests before I brought my GPSDO in line
too. The PRS10 is the source for the 10MHz as well as reading the 1PPS
output from it.
-----------------------------------------From: "Tom Van Baak"
To: "Discussion of precise time and frequency measurement"
Sent: Sunday October 14 2018 9:45:46PM
Subject: Re: [time-nuts] PRS10 MDEV
Thanks for sharing the plot.
What instrument are you using to make the measurements? And what
frequency reference is being used? Is this a free-running PRS10, or is
it locked to GPSDO with some time constant?
Is that same GPSDO being used as a reference for your measurements?
The plateau looks very much like GPSDO behavior and the slide into
e-14 and e-15 territory looks like you're measuring a PLL.
----- Original Message -----
From: "Chris Burford"
Sent: Sunday, October 14, 2018 7:07 PM
Subject: [time-nuts] PRS10 MDEV
> Hello All,
> I've collected several data sets over the last few days from my RFS
> and I'm puzzled by what I'm seeing. A link to the plot is here:
/> > I'm looking at the averaging periods from about 100 thru 400 tau
> noticed a "plateau" or a brief level off period and then it
> down and right again. Is this flat area a function of the averaging
> algorithms for the MDEV or is it something else?
> I have spent considerable time in reading "Techniques for Frequency
> Stability Analysis" by W.J. Riley and a host of other publications
> (NIST, etc) in preparation for this. I would enjoy hearing from any
> readers that may have some insight as to what I'm seeing and or
> possible causes.
> Thanks for reading.
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