Shielded enclosures act as "Faraday cages," preventing external EMI from corrupting sensitive tests and containing internal signals to avoid interference with the surrounding environment. Following ensures that test results are repeatable and compliant with international regulatory requirements. How to Access EN 50147-1 PDF
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A common failure is discovering that a waveguide vent below its cutoff frequency provides only 60 dB instead of 90 dB due to poor installation. Shielded enclosures act as "Faraday cages