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:[email protected] voice:1-937-865-2020 fax:1-937-865-2048 ____________________Reply Separator____________________ Subject: Radiated Immunity Author: John Juhasz <[email protected]> List-Post: [email protected] 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"> <HTML> <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> Received: from ruebert.ieee.org ([199.172.136.3]) by mail.monarch.com with SMTP (IMA Internet Exchange 3.14) id 00010ECA; Wed, 12 Jul 2000 13:08:59 -0700 Received: by ruebert.ieee.org (8.9.3/8.9.3) id LAA28418; Wed, 12 Jul 2000 11:28:21 -0400 (EDT) Message-ID: <E15CFB09B1FAD311B74700D0B746BDC114E55F@EMAIL> From: John Juhasz <[email protected]> To: "'[email protected]'" <[email protected]> Subject: Radiated Immunity List-Post: [email protected] Date: Wed, 12 Jul 2000 11:23:46 -0400 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) Content-Type: multipart/alternative; Sender: [email protected] Precedence: bulk Reply-To: John Juhasz <[email protected]> X-Resent-To: Multiple Recipients <[email protected]> X-Listname: emc-pstc X-Info: Help requests to [email protected] X-Info: [Un]Subscribe requests to [email protected] X-Moderator-Address: [email protected] ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected]
