[time-nuts] Generate 1 PPS signal on serial port

[Chris Albertson]

>
> I want to analyze the 1 PPS signal generated by the PC and the
> synchronization process or to compare two 1 PPS signals generated by
> different computers.
>
>
OK, but that just kicks the question further down the road.  WHY would you
want to compare two PPS signals?

It is easy to do as Linux now has a PPS generator built-in.   There is
nothing to do but configure it.

Expect the PPs to have a random 2 uSec or more jitter.   It could be much
worse.   I think the PPS generation uses timer interrupts.  The timer
advances in uSec ticks and then there is some latency so expect and error
in the range of a 'handful of uSec."

-- 

Chris Albertson
Redondo Beach, California