Signal integrity testing using multiple out-of-band sources in a reverberation chamber

This paper considers the use of the reverberation chamber as a possible facility to test equipment, illuminated by multiple sources, in order to ascertain their susceptibility to in-band effects caused by intermodulation from two or more out-of-band signals. The work is premised on the fact that issues with signal integrity may not be dominated with direct single-source threats but may be substantially affected by intermodulation from two or more signals that would, themselves be filtered out of the system, combining through active (or possibly passive) intermodulation to give rise to a noise signal that is within the consideration band of the signal whose integrity is paramount. The purpose of the paper is to present the results of a first series of simulation experiments that indicate that a simple approach to multiple source testing may be effective as a basis for a more extensive set of tests.