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very low frequencies

См. также в других словарях:

  • very low frequencies — The range of radio frequencies between 3 and 30 kHz. These are invariably ground waves, and with high power and large, efficient antennae they can provide worldwide coverage. VLF is used by Omega …   Aviation dictionary

  • Very low frequency — or VLF refers to radio frequencies (RF) in the range of 3 kHz to 30 kHz. Since there is not much bandwidth in this band of the radio spectrum, only the very simplest signals are used, such as for radio navigation. Also known as the myriameter… …   Wikipedia

  • Low frequency — or LF refers to Radio Frequencies (RF) in the range of 30 kHz ndash;300 kHz. In Europe, and parts of Northern Africa and of Asia, part of the LF spectrum is used for AM broadcast service. In the western hemisphere, its main use is for aircraft… …   Wikipedia

  • Low-frequency effect — Low Frequency Effects (LFE) is the name of an audio track specifically intended for deep, low pitched sounds ranging from 3 200 Hz. This track is normally sent to a speaker that is specially designed for low pitched sounds called the subwoofer or …   Wikipedia

  • Low-power broadcasting — Contents 1 United States 1.1 FM radio 1.1.1 LPFM classes 1.1.2 …   Wikipedia

  • Low-noise block converter — A low noise block converter (LNB, for low noise block, or sometimes LNC, for low noise converter) is the (receiving, or downlink) antenna of what is commonly called the parabolic (actually paraboloid) satellite dish commonly used for satellite TV …   Wikipedia

  • Low-pass filter — A low pass filter is a filter that passes low frequency signals but attenuates (reduces the amplitude of) signals with frequencies higher than the cutoff frequency. The actual amount of attenuation for each frequency varies from filter to filter …   Wikipedia

  • Low-frequency oscillation — The term low frequency oscillation (LFO) is an audio signal usually below 20 Hz which creates a pulsating rhythm rather than an audible tone. LFO predominantly refers to an audio technique specifically used in the production of electronic music.… …   Wikipedia

  • Very high frequency — (VHF) is the radio frequency range from 30 MHz to 300 MHz. Frequencies immediately below VHF are denoted High frequency (HF), and the next higher frequencies are known as Ultra high frequency (UHF). The frequency allocation is done by ITU. Common …   Wikipedia

  • Low-voltage differential signaling — Low voltage differential signaling, or LVDS, is an electrical signaling system that can run at very high speeds over inexpensive twisted pair copper cables. It was introduced in 1994, and has since become very popular in computers, where it forms …   Wikipedia

  • Very small aperture terminal — A Very Small Aperture Terminal (VSAT), is a two way satellite ground station with a dish antenna that is smaller than 3 meters (most VSAT antennas range from 75 cm to 1.2 m). VSAT data rates typically range from narrowband up to 4 Mbit/s. VSATs… …   Wikipedia

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