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  2. Speedtest.net - Wikipedia

    en.wikipedia.org/wiki/Speedtest.net

    Internet speed test. License. Freeware. Website. www .speedtest .net. Speedtest.net, also known as Speedtest by Ookla, is a web service that provides free analysis of Internet access performance metrics, such as connection data rate and latency. It is the flagship product of Ookla, a web testing and network diagnostics company founded in 2006 ...

  3. 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 ...

  4. Electromagnetic radiation - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_radiation

    In physics, electromagnetic radiation ( EMR) consists of waves of the electromagnetic (EM) field, which propagate through space and carry momentum and electromagnetic radiant energy. [1] Types of EMR include radio waves, microwaves, infrared, (visible) light, ultraviolet, X-rays, and gamma rays, all of which are part of the electromagnetic ...

  5. Spread spectrum - Wikipedia

    en.wikipedia.org/wiki/Spread_spectrum

    v. t. e. In telecommunication, especially radio communication, spread spectrum are techniques by which a signal (e.g., an electrical, electromagnetic, or acoustic) generated with a particular bandwidth is deliberately spread in the frequency domain over a wider frequency band. Spread-spectrum techniques are used for the establishment of secure ...

  6. Spectrum analyzer - Wikipedia

    en.wikipedia.org/wiki/Spectrum_analyzer

    A spectrum analyzer is also used to determine, by direct observation, the bandwidth of a digital or analog signal. A spectrum analyzer interface is a device that connects to a wireless receiver or a personal computer to allow visual detection and analysis of electromagnetic signals over a defined band of frequencies.

  7. Spectrum (brand) - Wikipedia

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

    Spectrum is the trade name of Charter Communications, which is widely used by market consumers and commercial cable television channels, internet, telephone, and wireless service providers. The brand was first introduced in 2014; prior to that, these services were marketed primarily under the Charter brand. Following the acquisitions of Time ...

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