Path: utzoo!attcan!uunet!seismo!sundc!pitstop!sun!decwrl!labrea!rutgers!apple!voder!pyramid!prls!philabs!micomvax!ray
From: ray@micomvax.UUCP (Ray Dunn)
Newsgroups: comp.sys.ibm.pc
Subject: Re: 40 MHZ 286?
Message-ID: <1274@micomvax.UUCP>
Date: 14 Sep 88 20:52:53 GMT
References: <342@intek01.UUCP> <16800359@clio> <397@pigs.UUCP>
Reply-To: ray@micomvax.UUCP (Ray Dunn)
Organization: Philips Electronics Ltd. (TDS - Montreal) St. Laurent QC, Canada
Lines: 33

In article <397@pigs.UUCP> haugj@pigs.UUCP (The Beach Bum) writes:
>In article <16800359@clio> berger@clio.las.uiuc.edu writes:
>>Not to mention, a 40 MHz clock requires a lot of radio-frequency
>>engineering.  
>
>not true.  digital methods work very well at 40MHz.  lead length
>becomes a factor and power requirements go up, but nothing
>resembling "radio-frequency engineering"....

There are more things in heaven and earth.....

I know it's very difficult for him, but perhaps The Bum should *really*
try to assume that there might just *possibly* be something in what others
say before he jumps to his terminal and puts his foot in it.

As the frequency increases, meeting FCC, FTZ and other classification
standards in Radio Frequency Interference becomes more and more difficult.

At 20 Mhz it is a bitch, at 40 Mhz, meeting FCC class B will require as much
specialized engineering work in PCB layout techniques and housing design etc
as does the digital design.  Probably more.

Have a look inside some boxes, PS/2's do a beautiful job in ant-EMI
engineering, particularly the 70's and 80's.

I'm inclined to give berger@clio the benefit of the doubt and assume that
this is what he was referring to.  Aren't you?

-- 
Ray Dunn.                      |   UUCP: ..!philabs!micomvax!ray
Philips Electronics Ltd.       |   TEL : (514) 744-8200   Ext: 2347
600 Dr Frederik Philips Blvd   |   FAX : (514) 744-6455
St Laurent. Quebec.  H4M 2S9   |   TLX : 05-824090