Hi Bob, I did run into problems with certain USB devices before, and the best way of isolating the problem was to cover the whole PC with Al foil to make sure that there is no radiation from the PC. There is issue with air-circulation of PC, but as long as each scan doesn't take more than 30 minutes, there shouldn't be any problems. Make sure that AL foil is grounded at multiple points, if al is floating then, it can cause you more grief than you have now. Dell tend to be very quite from my experience, but I can't guarantee that for USB.
Philip Kim EMC Engineer CETECOM Inc. [email protected] Telephone: 408-586-6235 Fax: 408-586-6299 CETECOM is celebrating 10 years of being your world-wide partner in mobile communications and we would like to welcome you on our newly-arranged website: http://www.cetecom.com. From: [email protected] [mailto:[email protected]] Sent: Tuesday, November 11, 2003 8:35 AM To: [email protected] Subject: USB2 Is anyone (besides us) having any problems passing European Class B radiated emissions on devices that use USB2 communications? Does anyone know of a quiet USB2 laptop or PC? Any tips on isolating the noise to the PC or to the device? Emissions occur only when the devices are communicating with each other. Immunity such as 61000-4-6 is a problem as well. Thanks, Bob Heller 3M EMC Laboratory, 76-1-01 St. Paul, MN 55107-1208 Tel: 651- 778-6336 Fax: 651-778-6252 ======================================================= This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
