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carrier-frequency beat

См. также в других словарях:

  • Frequency comb — A frequency comb is the graphic representation of the spectrum of a mode locked laser. An octave spanning comb can be used for mapping radio frequencies into the optical frequency range or it can be used to steer a piezoelectric mirror within a… …   Wikipedia

  • Carrier wave — In telecommunications, a carrier wave, or carrier is a waveform (usually sinusoidal) that is modulated (modified) with an input signal for the purpose of conveying information, [citeweb|title=Carrier wave with no modulation transports no… …   Wikipedia

  • Beat frequency oscillator — A beat frequency oscillator or BFO in radio telegraphy, is a dedicated oscillator used to create an audio frequency signal from carrier wave transmissions to make them audible, as they are not broadcast as such. The signal from the BFO is then… …   Wikipedia

  • Reduced-carrier transmission — is an amplitude modulation (AM) transmission in which the carrier wave level is reduced to reduce wasted electrical power. Suppressed carrier transmission is a special case in which the carrier level is reduced below that required for… …   Wikipedia

  • Intermediate frequency — In communications and electronic engineering, an intermediate frequency (IF) is a frequency to which a carrier frequency is shifted as an intermediate step in transmission or reception. The intermediate frequency is created by mixing the carrier… …   Wikipedia

  • Superheterodyne receiver — A 5 tube superheterodyne receiver made in Japan around 1955 In electronics, a superheterodyne receiver (sometimes shortened to superhet) uses frequency mixing or heterodyning to convert a received signal to a fixed intermediate frequency, which… …   Wikipedia

  • NTSC — This article is about the television system. For the Indonesian government agency, see National Transportation Safety Committee. Television encoding systems by nation; countries using the NTSC system are shown in green. NTSC, named for the… …   Wikipedia

  • Global Positioning System — GPS redirects here. For other uses, see GPS (disambiguation). Geodesy Fundamentals …   Wikipedia

  • Sideband — The power of an AM signal plotted against frequency. Key: fc is the carrier frequency, fm is the maximum modulation frequency In radio communications, a sideband is a band of frequencies higher than or lower than the carrier frequency, containing …   Wikipedia

  • Shortwave radio — Shortwave can also refer to a shortwave trough meteorology. A solid state, analog shortwave receiver Shortwave radio refers to the upper MF (medium frequency) and all of the HF (high frequency) portion of the radio spectrum, between… …   Wikipedia

  • Detector (radio) — Passband modulation v · d · e Analog modulation AM · …   Wikipedia

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