Conclusion

Electromagnetic compatibility is a field in which measurement uncertainties are extremely difficult to control. To reduce this complexity, simplification measures, rigor, restrictions on design freedom, etc., make it possible to limit the variations observed in measurements, without however claiming to be able to achieve the levels that can be attained on fixed measurement chains. The variability of electronics and the difficulties of positioning cables and electronics in EMC testing create too many degrees of freedom or unknowns to hope to control them all. For example, a 1 mm displacement of a wire in a strand can cause variations in the emitted field by a factor of more than 10 under certain conditions. Furthermore, the susceptibility of out-of-band electronic components is not characterized by manufacturers. To take into account the uncertainties in these test conditions, we can only...