em frequency

em frequency
частота электромагнитных волн

Англо-русский словарь по ядерным испытаниям и горному делу. 2013.

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  • Frequency-hopping spread spectrum — (FHSS) is a method of transmitting radio signals by rapidly switching a carrier among many frequency channels, using a pseudorandom sequence known to both transmitter and receiver. A spread spectrum transmission offers three main advantages over… …   Wikipedia

  • Frequency (producer) — Frequency Background information Birth name Bryan Fryzel Born January 4, 1983 …   Wikipedia

  • Frequency-dependent selection — is the term given to an evolutionary process where the fitness of a phenotype is dependent on its frequency relative to other phenotypes in a given population. In positive frequency dependent selection (or purifying frequency dependent selection) …   Wikipedia

  • Frequency response — is the measure of any system s spectrum response at the output to a signal of varying frequency (but constant amplitude) at its input. In the audible range it is usually referred to in connection with electronic amplifiers, microphones and… …   Wikipedia

  • Frequency dependent selection — is the term given to an evolutionary process where the fitness of a phenotype is dependent on its frequency relative to other phenotypes in a given population. In positive frequency dependent selection, the fitness of a phenotype increases as it… …   Wikipedia

  • Frequency (disambiguation) — Frequency refers to how often an event occurs within a period of time.It may also refer to: General * Audio frequency, a periodic vibration whose frequency is audible to the average human. * Statistical frequency, the number of times an event… …   Wikipedia

  • Frequency scaling — (also known as frequency ramping) is, in computer architecture, the technique of ramping a processor s frequency so as to achieve performance gains. Frequency ramping was the dominant force in commodity processor performance increases from the… …   Wikipedia

  • Frequency deviation — (Δf) is used in FM radio to describe the maximum instantaneous difference between an FM modulated frequency and the nominal carrier frequency. The term is sometimes mistakenly used as synonymous with frequency drift, which is an unintended offset …   Wikipedia

  • Frequency of optimum transmission — Frequency of optimum transmission, in the transmission of radio waves via ionospheric reflection, is the highest effective (i.e. working) frequency that is predicted to be usable for a specified path and time for 90% of the days of the month. It… …   Wikipedia

  • Frequency-division multiplexing — (FDM) is a form of signal multiplexing where multiple baseband signals are modulated on different frequency carrier waves and added together to create a composite signal. Non telephoneFDM can also be used to combine multiple signals before final… …   Wikipedia

  • frequency — UK US /ˈfriːkwənsi/ noun [C or U] ► the number of times something happens within a particular period, or the fact of something happening often or a large number of times: »Once a week is a good frequency to back up all the data. the frequency of… …   Financial and business terms


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