John, many many years ago, a company that I used to work for had a unit that
worked fine at our location, but would not work at the customers site. For lack
of anything better at the time, we used a relay set to oscillate. It killed the
unit from 30 feet away. That particular company felt the reason the IC
companies recommended bypass capacitors was because they owned stock in them,
therefore they did not use any. The unit had poor ground and VCC traces. Once
we improved the traces and added the bypass caps the problem went away. They
then started designing their next product with out bypass caps, etc. By the way
they are no longer in business.
Jim
Jim Bacher, Senior Engineer
Paxar - Monarch
email:jim_bac...@monarch.com
voice:1-937-865-2020
fax:1-937-865-2048
____________________Reply Separator____________________
Subject: Radiated Immunity
Author: John Juhasz <jjuh...@fiberoptions.com>
List-Post: emc-pstc@listserv.ieee.org
Date: 7/12/00 11:23 AM
Having a Radiated Immunity problem (300-320MHz - 3V/M ) that I need to
troubleshoot . . .
I don't have a screen room to work in . . . I want to troubleshoot down to
the circuit or component level . . .
is there any type of 'probe' that can be used instead of creating a
full-field in a chamber?
Any ideas . . . ? Haven't had a problem like this yet . . .
John Juhasz
Fiber Options
Bohemia, NY
631-419-2324
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
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<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<META NAME="Generator" CONTENT="MS Exchange Server version 5.5.2650.12">
<TITLE>Radiated Immunity</TITLE>
</HEAD>
<BODY>
<BR>
<P><FONT SIZE=2 FACE="Arial">Having a Radiated Immunity problem (300-320MHz -
3V/M ) that I need to troubleshoot . . . </FONT>
<BR><FONT SIZE=2 FACE="Arial">I don't have a screen room to work in . . . I want
to troubleshoot down to the circuit or component level . . . </FONT>
<BR><FONT SIZE=2 FACE="Arial">is there any type of 'probe' that can be used
instead of creating a full-field in a chamber? </FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">Any ideas . . . ? Haven't had a problem like this
yet . . . </FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">John Juhasz</FONT>
<BR><FONT SIZE=2 FACE="Arial">Fiber Options</FONT>
<BR><FONT SIZE=2 FACE="Arial">Bohemia, NY</FONT>
<BR><FONT SIZE=2 FACE="Arial">631-419-2324</FONT>
</P>
</BODY>
</HTML>
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From: John Juhasz <jjuh...@fiberoptions.com>
To: "'emc-p...@ieee.org'" <emc-p...@ieee.org>
Subject: Radiated Immunity
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Date: Wed, 12 Jul 2000 11:23:46 -0400
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