Subject: Re: Phase noise, jitter web site
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Date: Thu, 07 Nov 2002 03:11:18 GMT
NNTP-Posting-Date: Wed, 06 Nov 2002 19:11:18 PST
Organization: EarthLink Inc. -- http://www.EarthLink.net
You must be psychic. For the past couple days I've been trying to find
equations that allow one to convert phase noise (in dBc/Hz) into time-domain
jitter. We need to select an off-the-shelf rf signal generator with known
jitter characteristics. Agilent's response is, "Gee, we've had a lot of
requests for us to spec our equipment in both phase noise and jitter. We
haven't figured out a good way to do it, yet." They do, however, have one
generator that specs both. I've used its specs to select a cheaper unit
that -should- perform to our liking 8-(
The basic problem may be that since the phase of the phase noise is not
included in the dBc/Hz vs. frequency plots, it may be impossible to predict
the time-domain jitter from those plots.
I don't know. Maybe this website will help me (us) to figure this stuff out.
Thanks for the tip.
"Mike" wrote in message
> Ken Kundert has set up a web site for analog designers. To start, it has
> most of the papers he's written about jitter and phase noise.
> Ken is a fellow at Cadence, and he often makes use of (expensive Cadence)
> CAE tools in his papers to model and simulate phase noise and jitter. Even
> so, the theory is sound, and he writes well. It's worth checking out if
> you've ever wondered how to relate frequency domain phase noise to time
> domain jitter.
> -- Mike --