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1 very-high-frequency receiver
very-high-frequency receiver UKW-Empfänger mEnglish-German dictionary of Electrical Engineering and Electronics > very-high-frequency receiver
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2 very high-frequency receiver
Техника: ОВЧ приёмник, приёмник ОВЧ диапазонаУниверсальный англо-русский словарь > very high-frequency receiver
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3 very high frequency receiver
<av.el.tele> ■ UKW-Empfänger mEnglish-german technical dictionary > very high frequency receiver
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4 VHF receiver
English-German dictionary of Electrical Engineering and Electronics > VHF receiver
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5 VHFR
very high-frequency receiver - ОВЧ приёмник, приёмник ОВЧ диапазона -
6 VHFR
Техника: very high-frequency receiver -
7 VHF
1) овч
2) передача в диапазоне МВ
3) < very high-frequency broadcasting>
4) радиовещание в диапазоне МВ
– VHF antenna array
– VHF receiver
– VHF transmitter
– VHF UHF communication
– VHF wave band -
8 broadcasting
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9 Armstrong, Edwin Howard
[br]b. 18 December 1890 New York City, New York, USAd. 31 January 1954 New York City, New York, USA[br]American engineer who invented the regenerative and superheterodyne amplifiers and frequency modulation, all major contributions to radio communication and broadcasting.[br]Interested from childhood in anything mechanical, as a teenager Armstrong constructed a variety of wireless equipment in the attic of his parents' home, including spark-gap transmitters and receivers with iron-filing "coherer" detectors capable of producing weak Morse-code signals. In 1912, while still a student of engineering at Columbia University, he applied positive, i.e. regenerative, feedback to a Lee De Forest triode amplifier to just below the point of oscillation and obtained a gain of some 1,000 times, giving a receiver sensitivity very much greater than hitherto possible. Furthermore, by allowing the circuit to go into full oscillation he found he could generate stable continuous-waves, making possible the first reliable CW radio transmitter. Sadly, his claim to priority with this invention, for which he filed US patents in 1913, the year he graduated from Columbia, led to many years of litigation with De Forest, to whom the US Supreme Court finally, but unjustly, awarded the patent in 1934. The engineering world clearly did not agree with this decision, for the Institution of Radio Engineers did not revoke its previous award of a gold medal and he subsequently received the highest US scientific award, the Franklin Medal, for this discovery.During the First World War, after some time as an instructor at Columbia University, he joined the US Signal Corps laboratories in Paris, where in 1918 he invented the superheterodyne, a major contribution to radio-receiver design and for which he filed a patent in 1920. The principle of this circuit, which underlies virtually all modern radio, TV and radar reception, is that by using a local oscillator to convert, or "heterodyne", a wanted signal to a lower, fixed, "intermediate" frequency it is possible to obtain high amplification and selectivity without the need to "track" the tuning of numerous variable circuits.Returning to Columbia after the war and eventually becoming Professor of Electrical Engineering, he made a fortune from the sale of his patent rights and used part of his wealth to fund his own research into further problems in radio communication, particularly that of receiver noise. In 1933 he filed four patents covering the use of wide-band frequency modulation (FM) to achieve low-noise, high-fidelity sound broadcasting, but unable to interest RCA he eventually built a complete broadcast transmitter at his own expense in 1939 to prove the advantages of his system. Unfortunately, there followed another long battle to protect and exploit his patents, and exhausted and virtually ruined he took his own life in 1954, just as the use of FM became an established technique.[br]Principal Honours and DistinctionsInstitution of Radio Engineers Medal of Honour 1917. Franklin Medal 1937. IERE Edison Medal 1942. American Medal for Merit 1947.Bibliography1922, "Some recent developments in regenerative circuits", Proceedings of the Institute of Radio Engineers 10:244.1924, "The superheterodyne. Its origin, developments and some recent improvements", Proceedings of the Institute of Radio Engineers 12:549.1936, "A method of reducing disturbances in radio signalling by a system of frequency modulation", Proceedings of the Institute of Radio Engineers 24:689.Further ReadingL.Lessing, 1956, Man of High-Fidelity: Edwin Howard Armstrong, pbk 1969 (the only definitive biography).W.R.Maclaurin and R.J.Harman, 1949, Invention \& Innovation in the Radio Industry.J.R.Whitehead, 1950, Super-regenerative Receivers.A.N.Goldsmith, 1948, Frequency Modulation (for the background to the development of frequency modulation, in the form of a large collection of papers and an extensive bibliog raphy).KFBiographical history of technology > Armstrong, Edwin Howard
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10 system
система; комплекс; средство; способ; метод; сеть (напр. дорог) ;aiming-navigation system (analog, digital) — прицельно-навигационная система (аналоговая, цифровая)
air observation, acquisition and fire control system — (бортовая) система воздушной разведки, засечки целей и управления огнем
air support aircraft ECM (equipment) system — (бортовая) система РЭП для самолетов авиационной поддержки
airborne (ground) target acquisition and illumination laser system — ав. бортовая лазерная система обнаружения и подсветки (наземных) целей
airborne (ground) targeting and laser designator system — ав. бортовая лазерная система обнаружения и целеуказания (наземных целей)
airborne laser illumination, ranging and tracking system — ав. бортовая система лазерной подсветки, определения дальности и сопровождения цели
artillery (nuclear) delivery system — артиллерийская система доставки (ядерного) боеприпаса (к цели)
C2 system — система оперативного управления; система руководства и управления
C3 system — система руководства, управления и связи; система оперативного управления и связи
channel and message switching (automatic) communications system — АСС с коммутацией каналов и сообщений
country-fair type rotation system (of instruction) — метод одновременного обучения [опроса] нескольких учебных групп (переходящих от одного объекта изучения к другому)
dual-capable (conventional/nuclear) weapon delivery system — система доставки (обычного или ядерного) боеприпаса к цели
electromagnetic emitters identification, location and suppression system — система обнаружения, опознавания и подавления источников электромагнитных излучений [излучающих РЭС]
field antimissile (missile) system — полевой [войсковой] ПРК
fire-on-the-move (air defense) gun system — подвижный зенитный артиллерийский комплекс для стрельбы в движении [на ходу]
fluidic (missile) control system — ркт. гидравлическая [струйная] система управления полетом
forward (area) air defense system — система ПВО передового района; ЗРК для войсковой ПВО передового района
graduated (availability) operational readiness system — Бр. система поэтапной боевой готовности (частей и соединений)
high-resolution satellite IR detection, tracking and targeting system — спутниковая система с ИК аппаратурой высокой разрешающей способности для обнаружения, сопровождения целей и наведения средств поражения
ICBM (alarm and) early warning satellite system — спутниковая система обнаружения пусков МБР и раннего предупреждения (средств ПРО)
information storage, tracking and retrieval system — система накопления, хранения и поиска информации
instantaneous grenade launcher (armored vehicle) smoke system — гранатомет (БМ) для быстрой постановки дымовой завесы
Precision Location [Locator] (and) Strike system — высокоточная система обеспечения обнаружения и поражения целей; высокоточный разведывательно-ударный комплекс
rapid deceleration (parachute) delivery system — парашютная система выброски грузов с быстрым торможением
real time, high-resolution reconnaissance satellite system — спутниковая разведывательная система с высокой разрешающей способностью аппаратуры и передачей информации в реальном масштабе времени
received signal-oriented (output) jamming signal power-adjusting ECM system — система РЭП с автоматическим регулированием уровня помех в зависимости от мощности принимаемого сигнала
sea-based nuclear (weapon) delivery system — система морского базирования доставки ядерного боеприпаса к цели
small surface-to-air ship self-defense (missile) system — ЗРК ближнего действия для самообороны корабля
Status Control, Alerting and Reporting system — система оповещения, контроля и уточнения состояния [боевой готовности] сил и средств
surface missile (weapon) system — наземный [корабельный] РК
target acquisition, rapid designation and precise aiming system — комплекс аппаратуры обнаружения цели, быстрого целеуказания и точного прицеливания
— ABM defense system— antimissile missile system— central weapon system— countersurprise military system— laser surveying system— tank weapon system— vertical launching system— weapons system -
11 system
1) система || системный3) вчт операционная система; программа-супервизор5) вчт большая программа6) метод; способ; алгоритм•system halted — "система остановлена" ( экранное сообщение об остановке компьютера при наличии серьёзной ошибки)
- CPsystem- H-system- h-system- hydrogen-air/lead battery hybrid system- Ksystem- Lsystem- L*a*b* system- master/slave computer system- p-system- y-system- Δ-system
См. также в других словарях:
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
High frequency — (HF) radio frequencies are between 3 and 30 MHz. Also known as the decameter band or decameter wave as the wavelengths range from one to ten decameters (ten to one hundred metres). Frequencies immediately below HF are denoted Medium frequency… … Wikipedia
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
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Receiver (radio) — This article is about a radio receiver, for other uses see Radio (disambiguation). A radio receiver is an electronic circuit that receives its input from an antenna, uses electronic filters to separate a wanted radio signal from all other signals … Wikipedia
Frequency synthesizer — A frequency synthesizer is an electronic system for generating any of a range of frequencies from a single fixed timebase or oscillator. They are found in many modern devices, including radio receivers, mobile telephones, radiotelephones, walkie… … Wikipedia
Frequency modulation — See also: Amplitude modulation In telecommunications, frequency modulation (FM) conveys information over a carrier wave by varying its frequency (contrast this with amplitude modulation, in which the amplitude of the carrier is varied while its… … Wikipedia
Very minimum-shift keying — VMSK, for Very Minimum Shift Keying modulation, is one of several digital modulation methods claimed to send high speed digital data through very low bandwidth (or narrowband) channels. A typical claim is a data rate of 6 Mbit/s in a bandwidth of … Wikipedia
High-Definition Multimedia Interface — Infobox connector name=High Definition Multimedia Interface type=Digital audio/video connector logo= caption=HDMI cable and HDMI official logo designer=HDMI Founders design date=December 2002 manufacturer=HDMI Adopters production date=2003… … Wikipedia
High-definition television — Logo High definition television (HDTV) is video that has resolution substantially higher than that of traditional television systems (standard definition television). HDTV has one or two million pixels per frame, roughly five times that of SD… … Wikipedia
High fidelity — or hi fi reproduction is a term used by home stereo listeners and home audio enthusiasts (audiophiles) to refer to high quality reproduction of sound or images that are very faithful to the original master recording. High fidelity equipment has… … Wikipedia
