Bob Camp <[email protected]> ha scritto:
Hi
20 hours should be 20*60*60 = 72000 samples. The graphs appear to show about
17,000 samples.
Hello Bob,
unfortunately I'm not logging all the pps
samples, I'm picking one sample every about
4 pulses, because I'm triggering the counter
and waiting 4s before reading the result.
So these are not consecutive pps periods.
See my previous message of 11-Dec 23:36.
Here I have two main problems I will try to
solve for now:
- I have to understand how to sync the logging
script to the counter, so I can read all the values.
- The counter cannot read every pps in period
mode, but one every two, so I will try
to use the start-stop method, since this
FE5680 frequency is fortunately very close
to the mark.
If the results do cover a 20 hour period and do not have drift removed,
that's a good FE5680. 1.4x10^-14 is an amazing number for one of those.
Bob
Sorry, here I don't follow you, maybe my graph
is misleading, or I'm not understanding, but I
see that the FE5680 frequency seem wrong by 3x10^-10
and goes up and down by 3 to 4x10^-10, it's not
thermoregulated but simply mounted on an aluminium
plate, into a room not thermoregulated.
Fabio
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