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  2. Radio spectrum - Wikipedia

    en.wikipedia.org/wiki/Radio_spectrum

    The radio spectrum is the part of the electromagnetic spectrum with frequencies from 3 Hz to 3,000 GHz (3 THz). Electromagnetic waves in this frequency range, called radio waves, are widely used in modern technology, particularly in telecommunication. To prevent interference between different users, the generation and transmission of radio ...

  3. Spectrum (brand) - Wikipedia

    en.wikipedia.org/wiki/Spectrum_(brand)

    Spectrum is the trade name of Charter Communications. The name is widely used by both market consumers and commercial businesses. Services that Spectrum offers include cable television, internet access, internet security, managed services, mobile phone, and unified communications. The Spectrum brand name was first introduced in 2014.

  4. Charter Communications - Wikipedia

    en.wikipedia.org/wiki/Charter_Communications

    Charter Communications CATV systems was founded in 1980 by Charles H. Leonard in Barry County, Michigan. [citation needed] [15] [16] The original Charter system headquarters and offices were located at 1001 Payne Lake Road, Yankee Springs Township, Michigan.

  5. Amateur radio frequency allocations - Wikipedia

    en.wikipedia.org/wiki/Amateur_radio_frequency...

    e. Amateur radio frequency allocation is done by national telecommunication authorities. Globally, the International Telecommunication Union (ITU) oversees how much radio spectrum is set aside for amateur radio transmissions. Individual amateur stations are free to use any frequency within authorized frequency ranges; authorized bands may vary ...

  6. Citizens Broadband Radio Service - Wikipedia

    en.wikipedia.org/wiki/Citizens_Broadband_Radio...

    Citizens Broadband Radio Service (CBRS) is a 150 MHz wide broadcast band of the 3.5 GHz band (3550 MHz to 3700 MHz) in the United States. [1] In 2017, the US Federal Communications Commission (FCC) completed a process which began in 2012 to establish rules for commercial use of this band, while reserving parts of the band for the US Federal Government to limit interference with US Navy radar ...

  7. 33-centimeter band - Wikipedia

    en.wikipedia.org/wiki/33-centimeter_band

    33-centimeter band. The 33-centimeter or 900 MHz band is a portion of the UHF radio spectrum internationally allocated to amateur radio on a secondary basis. It ranges from 902 to 928 MHz and is unique to ITU Region 2 (Americas). [1] It is primarily used for very local communications as opposed to bands lower in frequency.

  8. Spectrum management - Wikipedia

    en.wikipedia.org/wiki/Spectrum_management

    Spectrum management is a growing problem due to the growing number of spectrum uses. [6] Uses include: over-the-air broadcasting, (which started in 1920); government and research uses (which include defense, public safety—maritime, air, police—resource management, transport, and radio astronomy); commercial services to the public (including voice, data, home networking); and industrial ...

  9. 10-meter band - Wikipedia

    en.wikipedia.org/wiki/10-meter_band

    The 10-meter band was allocated on a worldwide basis by the International Radiotelegraph Conference in Washington, DC, on 4 October 1927. [2] Its frequency allocation was then 28-30 MHz. A 300 kHz segment, from 29.700–30.000 MHz, was removed from the amateur radio allocation in 1947 by the International Radio Conference of Atlantic City.

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