Some years ago I managed to quiet a similar problem by routing the IDE cables flat against and along the chassis, and holding it/them tight with plastic clips; that gave "free" bypass capacitance for the common-mode currents. I DID have to specify exactly how the cables were to be folded and taped. A BETTER solution would have been a board spin, but when it's got that far this is often impractical.
Warning: Plastic clips and folded cables may later be a target of cost-reducing, "we don't need these," efforts, so must be well documented on drawings and BOM's if needed to meet EMI limits. Cortland ------------------------------------------- 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] All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
