[SI-LIST] Re: Jitter transfer vs. accumulation

Art

While I would agree that most terrestrial data communications links are 
dominated by a large number of non-random processes that appear random 
when taken as a whole, I would take issue with your .0005 or 700-ft tall 
human analogy.  There are structural limitations for humans.  For 
electronics, the charge of an electron sets a practical lower floor for 
all events, but there is not an upper limit.  You wouldn't argue against 
the near-Gaussian distribution of Johnson-Nyquist noise or the Poisson 
distribution of and Shot noise, or their impact on receiver and control 
loop design, would you?  And if you want to see 100V noise spike 
outliers, just wait long enough and you'll eventually receive a nuclear 
particle event.  It may not be truly random, since it was originally 
based on a deterministic cataclysmic nuclear process in a star, but it 
is for all practical purposes random.

Scott

Scott McMorrow
Teraspeed Consulting Group LLC
121 North River Drive
Narragansett, RI 02882
(401) 284-1827 Business
(401) 284-1840 Fax

http://www.teraspeed.com

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Teraspeed Consulting Group LLC




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