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Microphone Month 4

Wireless Receiver

A wireless system consists of two main components: a transmitter, and a receiver. The responsibility of the wireless receiver is to pick up the radio signal broadcast by the transmitter and change it back into an audio signal. Wireless receivers are available in two different configurations. Single antenna receivers utilize one receiving antenna and one tuner, similar to an FM radio. Diversity receivers, or dual antenna systems, often provide better wireless microphone performance. A diversity receiver utilizes two separate antennas spaced a short distance apart and (usually) two separate tuners. An “intelligent” circuit in the receiver automatically selects the better of the two signals, or in some cases a blend of both. Since one of the antennas will almost certainly be receiving a clean signal at any given moment, the chances of a dropout occurring are reduced. There are actually several distinctions among dual antenna systems (diversity, true diversity, etc.) that are variations on the same theme.

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