The American National Standards Institute (ANSI) has recently published SAE J 1113-27-2012 electromagnetic compatibility measurements procedure for vehicle components, specifically immunity to radiated electromagnetic fields (mode stir reverberation method). This standard is now available on the ANSI website.
“Vehicle electrical/electronic systems may be affected when immersed in an electromagnetic field generated by sources such as radio and TV broadcast stations, radar and communication sites, mobile transmitters, cellular phones etc. The reverberation method is used to evaluate the immunity of electronic devices in the frequency range of 500 MHz to 2.0 GHz, with possible extensions to 200 MHz to 10 GHz, depending upon chamber size and construction. Optional pulse modulation testing at HIRF (High Intensity Radiated Fields) test levels, based upon currently known environmental threats, has been added to this revision of the standard. This document addresses the Mode Stire (Continous Stirring) Reverberation testing method which has been successfully utilized as a design and production stage development tool for many years. The Model Tuned (Stepped Tuner) Reverberation testing method is covered in the SAE J1113-28 document.”