- guard a frequency
- Техника: дежурить на частоте
Универсальный англо-русский словарь. Академик.ру. 2011.
guard a frequency
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Guard band — has several meanings. NOTOC Radio and electronic signallingIn radio, a guard band is an unused part of the radio spectrum between radio bands, for the purpose of preventing interference.It is a narrow frequency range used to separate two wider… … Wikipedia
Guard — may refer to:Professional occupations* Bodyguard, who protects an individual from personal assault * Crossing guard, who stops traffic so pedestrians can cross the street * Prison guard, who supervises prisoners in a prison or jail * Security… … Wikipedia
Guard tone — is a feature of wireline modems.The guard tone is sent by the answering modem after it has sent the answer tone. It is a single continuous tone with a frequency of either 1800 Hz or 550 Hz, sent at a level of 6dB or 3dB, respectively, below the… … Wikipedia
guard frequency — An emergency VHF/UHF (very high frequency/ultrahigh frequency) channel monitored as a secondary frequency by all air and ground stations in a geographical area. The guard frequencies 121.5, 243 and 406 MHz are reserved around the world and are… … Aviation dictionary
Frequency Division Multiple Access — Multiplexverfahren (lat. multiplex „vielfach, vielfältig“) sind Methoden zur Signal und Nachrichtenübertragung, bei denen mehrere Signale zusammengefasst (gebündelt) und simultan über ein Medium (Leitung, Kabel oder Funkstrecke) übertragen werden … Deutsch Wikipedia
frequency-division multiplexing — Abbreviated FDM. A method of sharing a transmission channel by dividing the bandwidth into several parallel paths, defined and separated by guard bands of different frequencies designed to minimize interference. All signals are carried… … Dictionary of networking
guard band — A small frequency band used to separate multiple bands in a broadband transmission and prevent interference between the communications channels … Dictionary of networking
guard band — The portions of two adjacent frequency bands that remain unused and provide a mutual interference safety margin … IT glossary of terms, acronyms and abbreviations
Orthogonal frequency-division multiplexing — Passband modulation v · d · e Analog modulation AM · … Wikipedia
Single-frequency network — For other uses, see SFN (disambiguation). A single frequency network or SFN is a broadcast network where several transmitters simultaneously send the same signal over the same frequency channel. Contents 1 Overview 2 OFDM and COFDM 3 DVB T SFN … Wikipedia
Equipment of the United States Coast Guard — The United States Coast Guard uses cutters and small boats on the water, and fixed and rotary wing (helicopters) aircraft in the air. They also use a variety of firearms, including handguns, rifles and machine guns.CuttersOriginally, the Coast… … Wikipedia
