[time-nuts] J06 HP-59992A time interval calibrator for HP-531xxcounters
hmurray at megapathdsl.net
Sat Jul 8 17:53:52 EDT 2017
tvb at LeapSecond.com said:
> The PIC dividers are good to a couple ps. I suspect the larger issue is the
> PCB and wiring design.
What does "good" mean?
I'd expect the variations due to power or temperature would be easy to
Delay through classic CMOS is linear with absolute temperature and inverse
linear with supply voltage.
The classic way to get time-nuts level noise on FPGA outputs is to wiggle a
nearby pin. That shouldn't be a problem with a dedicated PIC but would
probably show up if you are generating multiple frequencies.
These are my opinions. I hate spam.
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