Battery simulators offer a variety of different EMI testing capabilities, all focusing on adjustments to the power capabilities provided to the DUT. These often include overvoltages, drop outs, cranking, and interruptions to the power supplied to the equipment. Individual standards categorize the types of interference different, often requiring specialized equipment, such as the EM Test Autowave. These systems offer flexible solutions to meet a variety of different standards and often modifications of pulses. The software associated with the EM Test systems offer a variety of different parameters that can be changed.
Battery supply simulators used in EMI testing can be rented as part of a system (as with the Teseq NSG 5500) or individually as stand alone units. These generators offer a variety of different simulation requirements for immunity testing. The challenge associated with automotive battery interference is the amount of input voltages they are subjected to and the conditions. Given these considerations, some testing of 12 volt and 24 volts systems can reach relatively high voltage transients. Often times, modifications will need to be made to the more standard pulses providing compliant test solutions to more specialized standards, below is a modification to ISO 7637 pulse 4.