Methods for speeding up radiated and conducted immunity tests

Different methods for reducing test time in immunity tests similar to IEC 61000-4-6 or IEC 61000-4-3 are compared. One option is to apply multiple signals at the same time. Hardware and software methods to create those signals are explained, limits and possible amplitude errors are discussed. Mode stirred chambers and methods which aim at substituting sinusoidal excitation by strong pulsed signals are not within the scope of this paper.