Bob Camp <[email protected]> ha scritto:
Hi
If you are driving the counter's frequency standard input with the FE5680
and simply measuring the period of the GPS output, then the data would make
sense.
Bob, the data make sense :)
I'm using the FE5680 as ext standard for
the counter, the pps is measured as period.
I am assuming that the counter starts counting on the pps out of the FE5680
and stops counting on the pps out of the GPS. That way every sample is the
time difference between the two.
Not now.
This will be the next try, at least now I know that I should
be able to get enough room for non overlap the periods for
some time.
I have only a doubt: is the internal OCXO of the counter
enough for the phase measurement or I should use the other
FE5680 as ext standard for the counter?
I will have the pps let's say 0,5 seconds apart, the counter
will give 1nS resolution, and will be 2x10^-9
on that interval, pretty demanding I think.
The better way will be to connect the PC to the FE5680
and drive it's pulse close to the pps, but I should bring
out the serial lines.
Fabio.
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