Radiated emission measurements for devices operating under Parts 15, 18, and licensed radio service equipment are required to be performed, to the extent possible, on an open-area test site (OATS). Alternative test sites, such as semi-anechoic chambers and TEM waveguides, may also be employed. The following points need to be addressed when using radiated emissions test sites: (1) meet the applicable site validation requirements; (2) compile a description of the measurement facilities employed, as specified in Section 2.948; and (3) for test sites located in the United States, obtain a Compliance Testing Experimental License.

See attachment 414788 D01 Radiated Test Site v01r01 for additional guidance on the use of test sites for radiated emissions measurements.