Hi Hans-Georg,
Maybe it is better to refer to this as the inverse of 20,48 GHz, since
that is the virtual clock rate of the interpolated coarse-clock.
Considering that it is 2048 * 10 MHz, it is not hard to imagine that a
coarse clock of say 80 MHz is then interpolated by 256 to achieve that,
which is entierly reasonable. 160 MHz and 128 is another example. A look
down the manual should indicate which one it is.
Cheers,
Magnus
On 2022-06-25 21:10, Hans-Georg Lehnard via time-nuts wrote:
Sorry, this was completely nonsense .. i correct the resolution factor
and forgot the "e" so i get 4.8828124999999998-11 as factor and scaled
the timelab plots with it. My interpretation is just as stupid.
The correct Factor is 4.8828124999999998e-11.
Am 2022-06-25 17:15, schrieb Hans-Georg Lehnard via time-nuts:
First of all the resolution factor from my first post is a copy error
the correct value is 4.8828124999999998-11 (less decimal places). In the
attached diagrams the correct factor was used.
I generated testfiles with 2046,2047,2048,2049,2050 intervals, loaded
into timelab and scaled them with 4.88281249999998-11.
MDEV shows more noise as real measurements . Another testfile with 2000
intervals and scaled with 5e-11 shows similar results.
In the Frequenc difference plot you can see the difference grows
stepwise with time. The zoom shows where the 2048 intervals are already
in the next time step and the 2000 intervals are not yet. By zooming in
you can also see this between the 2046 and 2050 intervals.
Possibly an overflow or rounding error ?
I think the overlap of this effect with the white noise of the real
measurements creates my measured jumps. More noise attenuates this
step-like progression.
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