USA - Wireless Microphones in the TV Bands, 600 MHz Guard Band, 600 MHz Duplex Gap, and the 941.5-944 MHz, 944-952 MHz, 952.850-956.250 MHz, 956.45-959.85 MHz, 1435-1525 MHz, 6875-6900 MHz and 7100-7125 MHz Bands

​Federal Communications Commission (FCC) revises the technical rules for low-power auxiliary station (LPAS) devices to permit a recently developed type of wireless microphone system, termed herein as a Wireless Multichannel Audio System (WMAS), to operate in the broadcast television (TV) bands and other LPAS frequency bands on a licensed basis.

The FCC adopts technical rules for licensed WMAS operations in specific frequency bands under our LPAS rules and also permits WMAS to operate on an unlicensed basis under the rules in the TV bands and 600 MHz duplex gap.

The FCC updates its existing LPAS and technical rules for wireless microphones, which already rely on certain European Telecommunications Standards Institute (ETSI) standards, to incorporate the latest version of that standard where appropriate.

Finally, the FCC updates the wireless microphone rules to reflect the end of the post-Incentive Auction transition period.

The FCC's goal in the FCC document is to increase wireless microphone spectral efficiency and enable more intensive use in the spectrum available for such operations.

This rule is effective November 18, 2024.