Measuring against a standard
Depending on which market you are developing your system for, you may be affected by one or more regulation and standard. For EMC conducted and radiation tests, the most known standards are the CISPR series released by the CISPR IEC technical committee, and the equivalent EN550xx. Formally, in Europe it should be rephrased the other way around. Indeed the official standards are the EN series and the CISPR are recognized to be equivalent. Said that, those standards are nice and clean, thus you just need to follow it and check if you comply or not with them. Ok, they are neither nice nor clean, but the majority of points do not leave for ambiguities.
