Re: [SI-LIST] : EMC quiet serial device???

rbmccammon@mmm.com
Thu, 11 Feb 1999 08:15:02 -0600

Sounds like you are beating yourself up over a non-problem.

If you are not using an independent certification lab, you might consider
that. If you are self certifying, you may be being tougher on yourself
than necessary. The independent labs know many tricks to help you certify
and are up on "industry standard practice" and acceptable methods.

"Roland F. Portman" <portman@bitmicro.com> on 02/09/99 01:35:03 PM

To: SI list <si-list@silab.Eng.Sun.COM>
cc: (bcc: Roy B. McCammon/AT-Austin/3M/US)
Subject: [SI-LIST] : EMC quiet serial device???

SI-List,

This group may not be the best place to ask for this type of information,
but
I am sure many of you
are involved in the area of EMC besides SI.

I have a new product which resides inside a workstation (mini-tower). The
PC
and our product within
passes FCC/CE class B with plenty of margin, however the standard requires
that a 'Typical System' pass Class B.
This system includes not only the mini-tower, monitor, keyboard, and mouse,
but also a perpherial connected
to the parallel port (a printer in our case) and a perpherial connected to
the
serial port (an external modem in our case). We have tried two different
modems. Both cause us to fail Class-B. If we turn them off the problem
goes away.

Can someone suggest a serial device (mfg and model) which they know to be
EMC
quiet?

Your help is greatly appreciated. For those of you who are similarly
interested, I will post a single summary
to this new-group.

Thanks in advance,

Roland

--
Roland F. Portman
BiT Microsystems, Inc.
48499 Milmont Drive
Fremont, CA  94538

(510) 623-2341 Ext 129 (510) 623-2342 Fax

portman@bitmicro.com http://www.bitmicro.com

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