Experimental assessment of over-testing probability in Bulk Current Injection as an alternative test procedure to radiated susceptibility verifications

The correlation between Bulk Current Injection (BCI) and radiated susceptibility (RS) test setups is investigated through the statistical characterization of a parameter called over-testing, which defines the excess of injected interference of BCI with respect to RS. Statistics takes into account lack of knowledge on the frequency response of the common-mode impedance of equipment under test. Unlike previous works which investigated this issue through theoretical modeling, a fully experimental approach is presented here. The proposed analysis confirms that BCI is a valid alternative to RS verifications, and provides a solid methodology for relating BCI test levels to equivalent RS testing conditions.