[time-nuts] J06 HP-59992A time interval calibrator for HP-531xx counters
Orin Eman
orin.eman at gmail.com
Sun Jul 9 17:14:08 UTC 2017
On Sat, Jul 8, 2017 at 5:15 PM, Mark Sims <holrum at hotmail.com> wrote:
> I think the way the fine cal works by checking the the intervals between
> four different edges that a lot of asymmetries in the signals are nulled
> out in the software.
>
> How good are 1:2 180 degree phase shifters at exactly shifting by 180
> degrees? At what cost?
>
The original parts were nothing special! PSC-2-1 is spec'd at 4 degrees
max phase unbalance - though typical is a lot less - and seems to be about
$14.
https://www.minicircuits.com/pdfs/PSC-2-1.pdf
https://www.minicircuits.com/pdfs/PSCJ-2-1+.pdf
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