The evolution of the standard reflects two decades of technological shifts: Frequency Range: 2002 Edition: Covered disturbances from 150 kHz to 1,000 MHz 2021 Edition: Extended to cover 150 kHz to 5,925 MHz , adding protection for modern bands like 5G, V2X, and Wi-Fi Electric Vehicles (EV): 2002 Edition: Minimal mention of high-voltage systems. 2021 Edition: Includes specific test methods for shielded high-voltage power supply systems EV charging modes Technical Content: 2021 Updates: Introduces technical revisions such as measurement uncertainty annexes and the removal of TEM cell annexes. Refined methods for both conducted emissions (voltage/current probe) and radiated emissions (typically in an absorber-lined shielded enclosure - ALSE).
The automotive landscape has shifted from simple analog systems in 2002 to complex, connected electric vehicles (EVs) today. cispr 25 2002 pdf 2021 download