mode-stirred chamber (MSC)

A Mode-Stirred Chamber (MSC) is a test chamber with metal shielded walls for immunity and emission testing of assemblies and devices.

In mode-stirred chambers, equipment is exposed to high- frequency electromagnetic radiation. The name originates from the different reflections of the electromagnetic waves occurring in the chamber, resulting in the excitation of different modes. The modes are generated by a rotating reflector that swirls the waves. The advantage of this test chamber is the wide frequency range that can be covered by a swirl chamber.

The standard of the International Electrotechnical Commission( IEC) IEC 61000-4-21 describes the application of the mode swirl chamber.