Bulk current injection test uncertainty assessment

Modern automobiles incorporate increasing amount of electronic systems, many with vehicle safety concerns, working in a harsh electromagnetic environment. The vehicle components immunity to electromagnetic interference is fundamental and is covered by international standards like ISO 11452-x and SAE J1113-x series for automotive EMC immunity testing. Also, each automobile manufacturer has its own EMC immunity requirements covering the different types of disturbances: radiated, conducted and ESD. Usually, the uncertainty related to the determination of the applied immunity level is not considered in the automotive EMC standards, but it is an important issue in test reliability and repeatability. We describe a methodology for uncertainty assessment in EMC immunity tests particularizing it on the bulk current injection test.