The test method is established and described by the International Electrotechnical Commission (IEC) as a means of verifying standardized performance of the fully anechoic chamber which generally has been temporarily converted from a semi-anechoic chamber.

The most recent specification describing this test method is CISPR 16-4-1 (2007) Specification for radio disturbances and immunity measuring apparatus and methods- Site validation above 1 GHz.