The Compliance Design EFT/B-100 is a rugged, flexible, and easy-to-operate system for testing immunity to electrical fast transients. The EFT/B-100 utilizes all solid-state circuitry to generate the surges necessary for assessing compliance to EFT immunity standards, including IEC 801-4 and IEC 1000-4-4. Bursts of electrical fast transients are generated by the switching of inductive loads. Equipment is exposed to them via direct conduction to power leads, and by capacitive coupling to signal and control leads. An adequate level of immunity to these signals is necessary for reliable product operation, and is rapidly becoming a mandatory regulatory requirement in many countries.