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  2. Wireless microphone licensing - Wikipedia

    en.wikipedia.org/wiki/Wireless_microphone_licensing

    Channel 69 was replaced by Channel 38 (606 MHz to 614 MHz) as the UK mobile radio microphone band. Licenses to use this band are issued on a shared basis, meaning that any frequency coordination between multiple users in or around a specific location must be managed by the users themselves.

  3. Wireless microphone - Wikipedia

    en.wikipedia.org/wiki/Wireless_microphone

    For large complex multi channel radio microphone systems, as used in broadcast television studios and musical theater productions, modular receiver systems with several (commonly six or eight) true diversity receivers slotting into a rack-mounted mainframe housing are available. Several mainframes may be used together in a rack to supply the ...

  4. Quadraphonic sound - Wikipedia

    en.wikipedia.org/wiki/Quadraphonic_sound

    A four channel quadraphonic diagram showing the usual placement of speakers around the listener. Quadraphonic (or quadrophonic, also called quadrasonic or by the neologism quadio [1] [formed by analogy with "stereo"]) sound – equivalent to what is now called 4.0 surround sound – uses four audio channels in which speakers are positioned at the four corners of a listening space.

  5. Medical Device Radiocommunications Service - Wikipedia

    en.wikipedia.org/wiki/Medical_Device_Radio...

    The FCC created the Medical Implant Communication Service (MICS) in 1999 "in response to a petition for rule making by [Medtronic, Inc.] to permit use of a mobile radio device, implanted in a patient, for transmitting data in support of the diagnostic and/or therapeutic functions associated with an implanted medical device."

  6. CB radio in the United States - Wikipedia

    en.wikipedia.org/wiki/CB_radio_in_the_United_States

    The CB Radio Service spectrum is divided into 40 numbered radio frequency channels from 26.965 to 27.405 MHz. Channel spacing is 10 kHz between channel centers with exceptions where CBRS channels are adjacent to Radio Control Radio Service. The initial channel allocations had a gap equal to two channel spaces between channels 22 and 23.

  7. 2.4 GHz radio use - Wikipedia

    en.wikipedia.org/wiki/2.4_GHz_radio_use

    The exact channel selection depends on the local popular 802.11 channel. For example, in a place that uses 1, 7, and 13 channels, the preference would be for channels 15, 16, 21, and 22. Channel coexistence is possible provided 8 meters of spacing between the 802.11 access point and the 802.15.4 device. [7]

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