The standard details specific methods for different field types across the frequency spectrum.
To establish a common measurement procedure to validate shielding effectiveness (SE) —the ratio of the electromagnetic field strength outside the shield versus inside. en 50147-1 pdf
Official versions of the standard (often listed as in the UK or DIN EN 50147-1 in Germany) can be purchased from national standards bodies: The standard details specific methods for different field
Provides the EN 50147-1:1996 PDF with instant digital delivery. en 50147-1 pdf
High-sensitivity spectrum analyzers or EMI receivers .
Specialized sets (loops, dipoles, biconical, and horn) calibrated for their respective frequency bands. Importance for EMC Compliance