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EN 50147-1:1996 (still the current active version) specifies a procedure for measuring the shielding attenuation of an anechoic chamber—typically a fully or semi-anechoic chamber used for EMC testing. The frequency range covered is generally from 10 kHz to 18 GHz, although practical applications often extend to 40 GHz with appropriate equipment. en 50147-1 pdf
Yes. As of this writing, there is no superseding version. However, check with your national standards body for any amendments. The ISO 17025 updating requirement is every three years, but the standard itself remains active. Disclaimer: This article is for informational purposes only
If you cannot access EN 50147-1, consider these: EN 50147-1:1996 (still the current active version) specifies