-
1 very high-frequency broadcasting
Большой англо-русский и русско-английский словарь > very high-frequency broadcasting
-
2 very high-frequency broadcasting
English-Russian scientific dictionary > very high-frequency broadcasting
-
3 broadcasting
-
4 овч
-
5 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 -
6 television
= TV1) телевидение || телевизионный3) телевизионный приёмник, телевизор•- access television
- achromatic television
- analog television
- anamorphic television
- battle television
- black-and-white television
- broadcasting television
- cable television
- closed-circuit television
- closed-system television
- color television
- combat television
- commercial television
- community television
- community antenna television
- cosmic television
- compatible color television
- digital television
- digital terrestrial television
- dot-interlaced television
- dot-sequential color television
- educational television
- enhanced-definition television
- extended-definition television
- fee television
- field-sequential color television
- fixed television
- Hi-Fi television
- high-definition television
- high fidelity television
- holographic television
- home television
- industrial television
- instructional television
- L3 television
- laser television
- LCD television
- line-sequential color television
- liquid-crystal display television
- low-definition television
- low light-level television
- master antenna television
- mobile television
- monochrome television
- multilingual television
- network television
- pay television
- phone-line television
- piped television
- portable television
- premium television
- projection television
- public television
- public service television
- satellite master-antenna television
- sequential color television
- simultaneous color television
- slow-scan television
- solid-state television
- space television
- sponsored television
- stereophonic television
- stereophonic sound television
- stereoscopic television
- subscription television
- terrestrial television
- three-dimensional television
- toll television
- training television
- UHF television
- ultra-high-frequency television
- underwater television
- very-high-frequency television
- VHF television
- wide-screen television
- wired television
- X-ray television -
7 antenna
1) антенна
2) антенный
– aft antenna
– aircraft-type antenna
– all-wave antenna
– annular antenna
– antenna power
– antenna amplifier
– antenna aperture
– antenna area
– antenna array
– antenna assembly
– antenna attenuator
– antenna circuit
– antenna coupling
– antenna crosstalk
– antenna current
– antenna curtain
– antenna effeciency
– antenna element
– antenna eliminator
– antenna EMF
– antenna fairlead
– antenna feed
– antenna feed-impedance
– antenna field
– antenna gain
– antenna inductance
– antenna lead
– antenna lead-in
– antenna lens
– antenna mounting
– antenna noise
– antenna reel
– antenna reflector
– antenna relay
– antenna resistance
– antenna socket
– antenna switch
– antenna system
– antenna tilt
– antenna tower
– antenna wire
– anti-fading antenna
– anti-interference antenna
– antistatic antenna
– aperiodic antenna
– aperture of antenna
– artificial antenna
– azimuth antenna
– balanced antenna
– base-driven antenna
– base-driving antenna
– base-fed antenna
– beacon antenna
– beam antenna
– beamwidth of antenna
– bedspring antenna
– Beverage antenna
– biconical antenna
– bidirectional antenna
– bilateral antenna
– billboard antenna
– bird-cage antenna
– box antenna
– broadband antenna
– broadcasting antenna
– built-in antenna
– bumper antenna
– buried antenna
– capacitor antenna
– Cassegrainian antenna
– center-driven antenna
– cheese antenna
– christmastree antenna
– cigar antenna
– circular antenna
– coaxial antenna
– collinear antenna
– communications antenna
– community antenna
– corkscrew antenna
– corner antenna
– corner-reflector antenna
– cosecant-squared antenna
– crossed antenna
– dielectric antenna
– dipole antenna
– direction-finding antenna
– directional antenna
– director antenna
– discone antenna
– dish antenna
– dish-shaped antenna
– disk antenna
– diversity antenna
– double antenna
– double-faced antenna
– double-umbrella antenna
– drag antenna
– dumb antenna
– eagle antenna
– elevate antenna
– elevated antenna
– elevation antenna
– elliptical antenna
– end-fire antenna
– extended antenna
– fan antenna
– ferrite-rod antenna
– fishbone antenna
– fixed antenna
– fixed-coil antenna
– fixed-loop antenna
– flagpole antenna
– flattop antenna
– flush-mounted antenna
– focal-line fed antenna
– folded antenna
– folded-dipole antenna
– forward-looking antenna
– frame antenna
– frequency-scanned antenna
– gamma antenna
– Goldschmidt antenna
– grid antenna
– ground antenna
– half-wave antenna
– harmonic antenna
– harp antenna
– height of antenna
– height-finding antenna
– helical antenna
– HF antenna
– high-frequency antenna
– highly-directional antenna
– homing antenna
– horn antenna
– horn-lens antenna
– horn-reflector antenna
– image antenna
– indoor antenna
– inverted V antenna
– inverted-L antenna
– isotropic antenna
– leaky-pipe antenna
– lens antenna
– LF antenna
– lobe-switching antenna
– lobing antenna
– localizer antenna
– Lodge-Muirhead antenna
– loop antenna
– low-angle antenna
– low-frequency antenna
– magnet-core antenna
– marker antenna
– mast antenna
– medium-frequency antenna
– MF antenna
– microwave antenna
– millimeter-wave antenna
– monitoring antenna
– monopulse antenna
– multiband antenna
– multibeam antenna
– multielement antenna
– multiple-horn antenna
– multiwire antenna
– mushroom antenna
– narrow-banded antenna
– non-directional antenna
– omnidirectional antenna
– operate on antenna
– outdoor antenna
– parabolic antenna
– paraboloid antenna
– parasitic antenna
– pencil-beam antenna
– phantom-target antenna
– phase-locked antenna
– pick-up antenna
– pillbox antenna
– plane-reflector antenna
– quadrant antenna
– quarter-wave antenna
– quiescent antenna
– radar antenna
– random antenna
– rear-looking antenna
– receiving antenna
– reel in antenna
– reflector-type antenna
– resonant antenna
– rhombic antenna
– ribbon antenna
– rig an antenna on supports
– rockinghorse antenna
– rod antenna
– running-board antenna
– sausage antenna
– screened antenna
– search antenna
– sense antenna
– series-fed antenna
– shaped-beam antenna
– shaped-reflector antenna
– shipboard antenna
– short-wave antenna
– shunt-fed antenna
– skid-fin antenna
– sleeve antenna
– sleeve-dipole antenna
– slot antenna
– slotted-guide antenna
– spheroidal antenna
– spiderweb antenna
– squirrel-cage antenna
– stacked antenna
– stacked-V antenna
– stagger antenna
– standing-wave antenna
– steerable antenna
– step-and-repeat antenna
– stream-line antenna
– streamlined antenna
– stripline antenna
– stub antenna
– submerged antenna
– submersible antenna
– superdirectional antenna
– superdirective antenna
– superturnstile antenna
– suppressor antenna
– supressor antenna
– surface-wave antenna
– tail antenna
– tapered antenna
– telescopic antenna
– telescopic rod antenna
– television antenna
– tier antenna
– tiltable antenna
– tilted antenna
– TL antenna
– top antenna
– top-fed antenna
– tower-type antenna
– tracking antenna
– trailing antenna
– transmission-line antenna
– transmitting antenna
– travelling-wave antenna
– tuned antenna
– turnstile antenna
– twin antenna
– two-element antenna
– two-wire antenna
– umbrella antenna
– umbrella-type antenna
– underwater antenna
– unidirectional antenna
– unloaded antenna
– vehicle-borne antenna
– vertical antenna
– VHF antenna array
– VHF-UHF antenna
– wide-band antenna
– wideband antenna
– wire antenna
– Yagi antenna
– Zeppelin antenna
– zig-zag antenna
Alford loop antenna — <naut.> антенна альфордовская, квадратная рамочная антенна
antenna area efficiency — <electr.> эффективность по площади
antenna lightning protector — < radio> разрядник антенный
antenna snatch block — < radio> блоки для натяжки антенны
antenna tuning inductor — < radio> катушка настройки антенны
bent rhombic antenna — < radio> антенна согнутая ромбическая
broadside directional antenna — < radio> антенна плашмя направленная
Chireix and Mesny antenna — < radio> антенна Ширекса-Мени
circularly polarized antenna — < radio> антенна вращающей поляризации
cylindrical cosecant antenna — косекансная цилиндрическая антенна
double rhombic antenna — < radio> антенна двойная ромбическая
electronically scanned antenna — антенна с электронным сканированием
leaky waveguide antenna — < radio> антенна волноводно-щелевая
parabolic reflector antenna — антенна с параболическим отражателем, параболическая антенна
pencil beam antenna — антенна с игольчатой диаграммой направленности
set antenna to bear on an object — наводить антенну на объект
slotted waveguide antenna — < radio> антенна волноводная щелевая
spark-gap switched antenna — < radio> антенна переключаемая разрядником
strut airborne antenna — < radio> антенна вертикальная самолетная
synthetic aperture antenna — антенна с синтезированной апертурой
tapered rectangular antenna — < radio> антенна клинообразная прямоугольная
top-loaded vertical antenna — антенна-мачта, мачта-антенна
traveling wave antenna — < radio> антенна бегущей волны
trigonal reflector antenna — антенна с треугольным отражателем
zoning of a lens antenna — < radio> выравнивание фазового фронта линзовой антенны
-
8 Poulsen, Valdemar
[br]b. 23 November 1869 Copenhagen, Denmarkd. 23 July 1942 Gentofte, Denmark[br]Danish engineer who developed practical magnetic recording and the arc generator for continuous radio waves.[br]From an early age he was absorbed by phenomena of physics to the exclusion of all other subjects, including mathematics. When choosing his subjects for the final three years in Borgedydskolen in Christianshavn (Copenhagen) before university, he opted for languages and history. At the University of Copenhagen he embarked on the study of medicine in 1889, but broke it off and was apprenticed to the machine firm of A/S Frichs Eftf. in Aarhus. He was employed between 1893 and 1899 as a mechanic and assistant in the laboratory of the Copenhagen Telephone Company KTAS. Eventually he advanced to be Head of the line fault department. This suited his desire for experiment and measurement perfectly. After the invention of the telegraphone in 1898, he left the laboratory and with responsible business people he created Aktieselskabet Telegrafonen, Patent Poulsen in order to develop it further, together with Peder Oluf Pedersen (1874– 1941). Pedersen brought with him the mathematical background which eventually led to his professorship in electronic engineering in 1922.The telegraphone was the basis for multinational industrial endeavours after it was demonstrated at the 1900 World's Exhibition in Paris. It must be said that its strength was also its weakness, because the telegraphone was unique in bringing sound recording and reproduction to the telephone field, but the lack of electronic amplifiers delayed its use outside this and the dictation fields (where headphones could be used) until the 1920s. However, commercial interest was great enough to provoke a number of court cases concerning patent infringement, in which Poulsen frequently figured as a witness.In 1903–4 Poulsen and Pedersen developed the arc generator for continuous radio waves which was used worldwide for radio transmitters in competition with Marconi's spark-generating system. The inspiration for this work came from the research by William Duddell on the musical arc. Whereas Duddell had proposed the use of the oscillations generated in his electric arc for telegraphy in his 1901 UK patent, Poulsen contributed a chamber of hydrogen and a transverse magnetic field which increased the efficiency remarkably. He filed patent applications on these constructions from 1902 and the first publication in a scientific forum took place at the International Electrical Congress in St Louis, Missouri, in 1904.In order to use continuous waves efficiently (the high frequency constituted a carrier), Poulsen developed both a modulator for telegraphy and a detector for the carrier wave. The modulator was such that even the more primitive spark-communication receivers could be used. Later Poulsen and Pedersen developed frequency-shift keying.The Amalgamated Radio-Telegraph Company Ltd was launched in London in 1906, combining the developments of Poulsen and those of De Forest Wireless Telegraph Syndicate. Poulsen contributed his English and American patents. When this company was liquidated in 1908, its assets were taken over by Det Kontinentale Syndikat for Poulsen Radio Telegrafi, A/S in Copenhagen (liquidated 1930–1). Some of the patents had been sold to C.Lorenz AG in Berlin, which was very active.The arc transmitting system was in use worldwide from about 1910 to 1925, and the power increased from 12 kW to 1,000 kW. In 1921 an exceptional transmitter rated at 1,800 kW was erected on Java for communications with the Netherlands. More than one thousand installations had been in use worldwide. The competing systems were initially spark transmitters (Marconi) and later rotary converters ( Westinghouse). Similar power was available from valve transmitters only much later.From c. 1912 Poulsen did not contribute actively to further development. He led a life as a well-respected engineer and scientist and served on several committees. He had his private laboratory and made experiments in the composition of matter and certain resonance phenomena; however, nothing was published. It has recently been suggested that Poulsen could not have been unaware of Oberlin Smith's work and publication in 1888, but his extreme honesty in technical matters indicates that his development was indeed independent. In the case of the arc generator, Poulsen was always extremely frank about the inspiration he gained from earlier developers' work.[br]Bibliography1899, British patent no. 8,961 (the first British telegraphone patent). 1903, British patent no. 15,599 (the first British arc-genera tor patent).His scientific publications are few, but fundamental accounts of his contribution are: 1900, "Das Telegraphon", Ann. d. Physik 3:754–60; 1904, "System for producing continuous oscillations", Trans. Int. El. Congr. St. Louis, Vol. II, pp. 963–71.Further ReadingA.Larsen, 1950, Telegrafonen og den Traadløse, Ingeniørvidenskabelige Skrifter no. 2, Copenhagen (provides a very complete, although somewhat confusing, account of Poulsen's contributions; a list of his patents is given on pp. 285–93).F.K.Engel, 1990, Documents on the Invention of Magnetic Re cor ding in 1878, New York: Audio Engineering Society, reprint no. 2,914 (G2) (it is here that doubt is expressed about whether Poulsen's ideas were developed independently).GB-N -
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
-
10 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
very high frequency — noun The frequency area from 30 MHz through 300 MHz, commonly used for radio and TV broadcasting. See Also: VHF … Wiktionary
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
Ultra high frequency — (UHF) designates a range (band) of electromagnetic waves with frequencies between 300 MHz and 3 GHz (3,000 MHz). Also known as the decimeter band or decimeter wave as the wavelengths range from ten to one decimeters. Radio waves with frequencies… … Wikipedia
broadcasting — /brawd kas ting, kah sting/, n. 1. the act of transmitting speech, music, visual images, etc., as by radio or television. 2. radio or television as a business or profession: She s training for a career in broadcasting. [1920 25; BROADCAST + ING1] … Universalium
High school radio — within the United States is almost as old as radio broadcasting itself. Simply defined as a radio station, with its studios located at a high school and usually operated by its students with faculty supervision, stations fitting this description… … 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
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
List of broadcasting terms — With every new technology a number of terms and slang words develop to assist in the rapid communication of ideas between the users of the technology.Below is a glossary of terms used in broadcasting. A ; ABC: In Australia, the Australian… … 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
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
