ABSTRACT
Wireless microphone systems operate in two different radio frequency ranges. These acronyms, also used in TV, will probably seem familiar. The FCC licenses wireless mics to operate between 150 to 216 MHz in the VHF (Very High Frequency) spectrum. It also licenses operation between 400 and 470 MHz and again between 900 and 950 MHz in the UHF (Ultra High Frequency) spectrum. Much lower frequency, and usually much cheaper, mics, operate between 41 and 49 MHz where they are subject to interference from all kinds of other devices.
