Hi Bert,
Reverting back to the list for more people to see.
Bert, VE2ZAZ wrote:
Hi Magnus,
No, I don't see why there would be any cycle slips since the readings are
around 65 ns and both Start and Stop come from the same reference OCXO. Quickly
browsing through the data does not show any.
You are correct, there isn't any cycle-slips. I just wanted to rule that
out.
I have attached the .TIM file in which you will find the raw data. If you can,
please check for frequency drift as well.
A quick look at the data (using fityk - a nice handy tool) I do see some
form of slow sliding effect, with quick retraces. These span about 15 ns
of range! Those effects does not look like coming out of the normal
noise but rather from some form of systematic property. It also is
interesting to note that the jitter seems to be lower for shorter
delays. The "quick" restoration slopes has linear shift while the
release is a much slower exponential response.
The noise is still substantial.
It would be interesting to see similar plot for a higher rate, such as 1
kHz.
Cheers,
Magnus
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