[time-nuts] 10MHz LTE-Lite - PPS accuracy?
Hal Murray
hmurray at megapathdsl.net
Wed Dec 10 23:36:19 UTC 2014
[Context is second PPS input.]
brayniac at gmail.com said:
> I think it depends if they are phase aligned or offset. If the interrupts
> are occurring at the same time, I would anticipate increased jitter. If they
> are offset I would not expect any negative impact.
> A simple way to demonstrate the effect would be to feed the same pulse to
> two different PPS pins. The ISRs will compete when both interrupts fire.
If you put a long cable between them, you can change the order of the
interrupts by swapping things. That may need a real driver and good
termination.
--
These are my opinions. I hate spam.
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