I once got into that "p-p" business and it was like pulling teeth to get the customer even semi-reasonable. He finally agreed to stipulate that the p-p value could be construed as 6 X the rms value.
Dana On Fri, Apr 10, 2020 at 6:57 AM Bob kb8tq <[email protected]> wrote: > Hi > > Which of the multitude of definitions are we talking about? > > One very common definition looks at peak to peak jitter and does > not care about the center. Another looks at +/- peak to edge and > then uses the greater of the two numbers. Other definitions look > at RMS jitter and generally don’t care about the edge. > > At least to me, the biggest problem is that any time “peak” or “peak > to peak” comes in to a calculation that involves random noise, > things go sideways fast. People pretty much never want to > define a confidence level (how any sigma?). They want an > absolute number. > > Lots of fun > > Bob > > > On Apr 10, 2020, at 6:05 AM, Dana Whitlow <[email protected]> wrote: > > > > Question about definition of jitter: Is it the variation in > > pulse-to-pulse spacing, or is it > > the variation in pulse positions with respect to a jitter-free waveform? > > > > Dana > > > > > > On Thu, Apr 9, 2020 at 11:21 PM Hal Murray <[email protected]> > wrote: > > > >> > >> [email protected] said: > >>> There is always an implied clock recovery loop that the the jitter is > >>> measured against. The loop may itself affect the jitter measurement > >> either by > >>> cleaning up jitter or contributing to it. > >> > >> Interesting. I hadn't thought about it that way. > >> > >> Suppose I measure the edge to edge times and make a histogram. Can I > get > >> jitter out of that? Where is the clock recovery loop? > >> > >> -- > >> These are my opinions. I hate spam. > >> > >> > >> > >> > >> _______________________________________________ > >> time-nuts mailing list -- [email protected] > >> To unsubscribe, go to > >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > >> and follow the instructions there. > >> > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
