Damped Oscillatory Wave Testing and Generator serve both for the evaluation and resilience assessments of electrical and electronic systems against transient electromagnetic disturbances such as lightning or switching surges in mind. The tests are thus most important to qualify the system under IEC 61000-4-12, to safeguard the performance of devices in the actual environment. Such a generator produces controlled decaying oscillatory waveforms, representing the simulation of the exposure of devices under transient conditions. In the immersion tests, the manufacturers will be assisted to learn and improve vulnerabilities in their products and increase safety and reliability against electromagnetic stress.