EMI/EMC troubleshooting techniques in switching mode power supplies

This work is intended to describe the origin of EMI from a state of the art flyback power supply and to explain some experimental techniques with current and near field probes useful to pass EMC regulations, to optimize a design or, simply, to better understand the culprits of the problem. The dialogue (poster) session in EPE09 is appropiated to show the technique in a practical way to delegates interested in the subject and this document is a general description of that session.