[time-nuts] PIC Divider Performance (was Re: time-nuts Digest, Vol 56, Issue 71)

Poul-Henning Kamp phk at phk.freebsd.dk
Tue Mar 31 05:29:50 UTC 2009

In message <49D16637.60502 at febo.com>, John Ackermann N8UR writes:

>Therefore, the PIC divider is a bit above the 5370B noise floor, but not

Many years ago, I did a similar experiment, but to eliminate the
timebases from the measurement I used the PPS output as start
and the 10MHz input frequency as stop.

That way only the delay & jitter of the PPSDIV is measured (+ cables
& counters obviously).

The result were of similar magnitude.


Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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