On Sunday, August 30, 2015 05:06:38 PM James Flynn wrote:
Martyn Smith martyn@... writes:
MEASUREMENT TECHNIQUE
We have three sources close in frequency (within 1 x 10E-8 of each
other).
Two sources are connected to the Ch0 and Ch 2 inputs of the
timepod, the
unit under test to
The is a publication by the NPL that talks about a similar technique, but
comes to a somewhat different conclusion.
http://publications.npl.co.uk/npl_web/pdf/mgpg68.pdf
Bottom line: it holds that the phase noise of all three sources can be
determined if they are taken two at a time; one
John,
On 08/31/2015 12:37 AM, John Miles wrote:
The is a publication by the NPL that talks about a similar technique, but
comes to a somewhat different conclusion.
http://publications.npl.co.uk/npl_web/pdf/mgpg68.pdf
Bottom line: it holds that the phase noise of all three sources can be
On that note, did you look more closely on the NIST analysis of
cross-correlation and a possible cancellation and thus overly optimistic
results? Did it have any consequence on your code? What did you take
away from it?
Yes, you can definitely get divots in the PN trace, especially in
Hi John,
On 08/31/2015 05:12 AM, John Miles wrote:
On that note, did you look more closely on the NIST analysis of
cross-correlation and a possible cancellation and thus overly optimistic
results? Did it have any consequence on your code? What did you take
away from it?
Yes, you can
Hello,
HISTORY
I make GPS/GNSS frequency standards (ultra low phase noise types) and I
always have to prove my results to the customer.
John Miles told me how to make absolute phase noise measurements using three
sources with the timepod.
MEASUREMENT TECHNIQUE
We have three sources
Martyn,
Thanks for this report. This is exactly why I invested in the time-pod
and why I use 2 reference sources for measurements.
It would be interesting to see papers on the validation of these
measurements.
Cheers,
Magnus
On 08/29/2015 01:54 PM, Martyn Smith wrote:
Hello,
HISTORY
I
