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ETSI EN 300 422-1

Wireless microphones; Audio PMSE up to 3 GHz; Part 1: Class A Receivers

Scope

The harmonised standard for professional wireless microphone and in-ear equipment in Europe: transmitter masks, receiver performance classes and the spectrum-efficiency requirements. Later revisions add the transmit mask and 20 MHz bandwidth ceiling that make Wireless Multichannel Audio Systems (WMAS) legal.

Notes

ETSI publishes its standards free of charge. This is the document behind WMAS, and the FCC aligned its own rules with the same approach in February 2024.

Where to get it

ETSI standards (free download)

Sources

• ETSI EN 300 422-1 — European Telecommunications Standards Institute primary