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Wireless microphone receiver racks backstage at a large televised music awards event Wireless microphone and radio receiver. There are many types of receiver. True Diversity receivers have two radio modules and two antennas. Diversity receivers have one radio module and two antennas, although some times the second antenna may not be obviously ...
Bluetooth devices intended for use in short-range personal area networks operate from 2.4 to 2.4835 GHz. To reduce interference with other protocols that use the 2.45 GHz band, the Bluetooth protocol divides the band into 80 channels (numbered from 0 to 79, each 1 MHz wide) and changes channels up to 1600 times per second.
A digital radio adapter add-on for a car, designed for listening to DAB radio broadcasts on vehicles that would otherwise lack the feature. Vehicles can be retrofitted or upgraded with additional, non-fixed audio systems. FM transmitters provide a way of listening to audio output from a device using the car's FM radio.
Bluetooth operates at frequencies between 2.402 and 2.480 GHz, or 2.400 and 2.4835 GHz, including guard bands 2 MHz wide at the bottom end and 3.5 MHz wide at the top. [25] This is in the globally unlicensed (but not unregulated) industrial, scientific and medical ( ISM ) 2.4 GHz short-range radio frequency band.
It may be used in concert with A2DP or VDP. [4] It is commonly used in car navigation systems to control streaming Bluetooth audio. It also has the possibility for vendor-dependent extensions. AVRCP has several versions with significantly increasing functionality: [5] 1.0 — Basic remote control commands (play/pause/stop, etc.) [6]
A well-known practical application of diversity reception is in wireless microphones, and in similar electronic devices such as wireless guitar systems. A wireless microphone with a non-diversity receiver (a receiver having only one antenna) is prone to random drop-outs, fades, noise, or other interference, especially if the transmitter (the ...
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