Frequent method done emissions are generally because of parasitic capacitances like those on the heatsink and transformer alongside with the board format, and switching voltage waveform over the change. Specifying the same attenuation as from the plot shown previously mentioned (on condition that the maker of the PSU has tested https://checks-design14678.oblogation.com/30644353/new-step-by-step-map-for-difference-between-emi-and-emc-filter