[time-nuts] PRS-10 input and output calibrations

[bg at lysator.liu.se]

Magnus,

Interesting! Have a couple of PRS-10s at work that we wanted to lock
together. We never got one to track the other in a reliable way.

--

   Björn

> Fellow time-nuts,
>
> Anyone who has tried to calibrate the PPS input and PPS output
> interpolators of the PRS-10?
>
> The output calibration seems pretty easy to do, just a TIC to measure
> the PPS to 10 MHz and then sweep through the output delay values to
> cover a little more than the 400 ns range.
>
> The input calibration would be something in the similar way, a simpel
> method would be to use a coax cable between output and input, and then
> use the internal output offset to measure the range of the input
> interpolator. However, the input interpolator is a decade better than
> the output interpolator. However, considering that I have a 5359A just
> waiting to be used, I think I use a fixed output PPS delay and trigger
> the 5359A with and then sweep that one.
>
> I would then use the collected data to find suitable correction values.
>
> Comments and suggestions? Experience?
>
> Cheers,
> Magnus
>
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