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designated frequency

См. также в других словарях:

  • Frequency standard — A frequency standard is a stable oscillator used for frequency calibration or reference. A frequency standard generates a fundamental frequency with a high degree of accuracy and precision. Harmonics of this fundamental frequency are used to… …   Wikipedia

  • Frequency assignment authority — In telecommunication, frequency assignment authority is the power granted an administration, or its designated or delegated leader or agency via treaty or law, to specify frequencies, or frequency bands, in the electromagnetic spectrum for use in …   Wikipedia

  • aerodrome traffic frequency — A frequency designated at an uncontrolled airport. An ATF is used to ensure all radio equipped aircraft operating within the area, normally within a 5 NM radius of the airport, are listening on a common frequency. The ATF is normally the ground… …   Aviation dictionary

  • discrete frequency — i. A separate radio frequency for use in direct pilot controller communications in ATC (air traffic control) that reduces frequency congestion by controlling the number of aircraft operating on a particular frequency at one time. Discrete… …   Aviation dictionary

  • mandatory frequency — A frequency designated at selected airports that are uncontrolled during certain hours only. Aircraft operating within the designated MF area, normally 5 NM radius of the airport, must be equipped with a functioning radio capable of maintaining… …   Aviation dictionary

  • GSM frequency bands — or frequency ranges are the cellular frequencies designated by the ITU for the operation of GSM mobile phones. Contents 1 GSM frequency bands 1.1 GSM 900, GSM 1800 and EGSM/EGSM 900 1.1.1 GSM 1800 …   Wikipedia

  • International distress frequency — An international distress frequency is a radio frequency that is designated for emergency communication by international agreement. Contents 1 History 2 Current frequencies 2.1 Digital Selective Calling frequencies 2.2 …   Wikipedia

  • UMTS frequency bands — or frequency ranges are the radio spectrum frequencies designated for the operation of the UMTS / HSDPA / HSUPA / HSPA+ system for mobile phones. UMTS FDD UMTS FDD is designed to operate in the following paired bands:Deployment in other frequency …   Wikipedia

  • Brevity code — Contents 1 American/NATO codes 1.1 A 1.2 B 1.3 C …   Wikipedia

  • Atomic line filter — A potassium Faraday filter designed, built and photographed by Jonas Hedin for making daytime LIDAR measurements at Arecibo Observatory.[1] An atomic line filter (ALF) is an advanced optical band pass filter used in the physical sciences for… …   Wikipedia

  • International Municipal Signals Association (IMSA) — The International Municipal Signals Association (IMSA) is one of the two main professional organizations contributing input to the Federal Highway Administration in revising and developing highway standards concerning traffic signals and control… …   Wikipedia

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