Maybe it got mashed up, but I only linked to one post, and that addressed the specific question that had been asked. There is also, as far as I know, no 'misinformation' in it. However if anything does need corrected, I can easily do that.
One of the main reasons that I did the test was all the actual (IMHO...) misinformation that was in the thread about the PIC dividers. I find them very useful and have not had any problems with them, but since they are mostly used on 53131As which do not have a very high resolution, I also wanted to see if I was missing anything. As far as I can see, it showed just what is going on as well as I could have expected with that scope, os I don't quite agree that *everything* should be ignored :) Angus. On Sat, 8 Jan 2022 14:00:28 +1300 (NZDT), you wrote: >That entire thread is full of misinformation and should be ignored unless one >understands the difference between random and data dependent jitter. > >For a well designed divider with a single output frequency only the random >jitter spec is significant. > >One doesn't need a bunch of expensive LeCroy gear to measure RJ of such >dividers as its PN manifestations are readily apparent and measurable. > >Using one of the supposedly super low jitter flipflops isn't a panacea. In >practice unless an appropriately designed ZCD is used the wideband input noise >of the very fast FF will dominate and produce much more jitter than expected >due to the relatively slow slew rate of the outputs of most 10MHz sources. > >Bruce > >> On 08/01/2022 12:40 Angus via time-nuts <time-nuts@lists.febo.com> wrote: >> >> >> On Fri, 07 Jan 2022 12:40:49 -0800, you wrote: >> >> >> The two biggest outside influences on the PICDIV are supply voltage and >> >> temperature. >> > >> >Another interesting influence is the number of outputs that are switching >> >and >> >the load on them. In particular, if you have several outputs running at >> >different frequencies, the clock-out delay should be slightly longer when 2 >> >outputs switch when compared to when only one is switching. >> > >> >Has anybody measured that on a PIC? (or similar chip) >> > >> >I think one of tvb's picDEVs has several outputs. >> >> To some extent: >> https://www.eevblog.com/forum/projects/easiest-way-to-divide-10mhz-to-1mhz/msg3257018/#msg3257018 >> _______________________________________________ >> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an >> email to time-nuts-le...@lists.febo.com >> To unsubscribe, go to and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
