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From: stephen@oahu.cs.ucla.edu (Steve Whitney)
Newsgroups: comp.sys.atari.st
Subject: Re: RFI, the FCC, and STs (was re: Talking about other computers here)
Message-ID: <1990Dec10.210421.20757@cs.ucla.edu>
Date: 10 Dec 90 21:04:21 GMT
References: <1990Dec3.195756.27537@cunixf.cc.columbia.edu> <479@aupair.cs.athabascau.ca> <1990Dec7.115131.26377@lsuc.on.ca>
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In article <1990Dec7.115131.26377@lsuc.on.ca> jimomura@lsuc.on.ca (Jim Omura) writes:
...
>They leave the stuff as marginal as they can get away with
>for RFI because anything you do about RFI costs money.
>But taking it from the top, the problem starts with IO interfacing.
>You can build a dirt cheap computer with no IO.  A grounded cage
>does it.  But as soon as you start adding IO ports you've got
>troubles.
...
Not to mention that the FCC and VDE require you to attach something to every 
port which can conceiveably be used simultaneously.  For FCC testing, these
peripherals have to be turned on!  So you get their emissions and emissions
from the rat's nest of cables added to your own product's.  For VDE testing,
the peripherals don't have to be turned on, but their cables still act like
antennae.  Atari computers have so many ports, I'd hate to see the test set up.
=Especially= the TT's testing.  That thing has more ports than you can shake
a stick at!

	--Steve

>Jim Omura, 2A King George's Drive, Toronto, (416) 652-3880
>lsuc!jimomura
>Byte Information eXchange: jimomura


-- 
Steve Whitney   "It's never _really_ the last minute"       (())_-_(())
UCLA Comp. Sci. Grad. Student                                | (* *) | 
Internet: stephen@cs.ucla.edu              UCLA Bruin-->    {  \_@_/  }
GEnie:    S.WHITNEY        (To Cal: We still have the axe!)   `-----'