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owl:Thing dbo:Automobile
rdfs:label
Radiotelegrafia 無線電報 무선전신기 Telegraf bezprzewodowy Sendrata telegrafio Telegraf nirkabel Wireless telegraphy Радіотелеграф Telegrafía sin hilos إبراق لاسلكي Радиотелеграф Radiotelegrafie Télégraphie sans fil 無線電信
rdfs:comment
무선전신기(영어: wireless telegraph)란 마르코니가 1896년 발명한 배와 비행기의 을 할 때 이용된 통신기이다. La telegrafía sin hilos es la transmisión de señales de telegrafía eléctrica sin cables (comunicación inalámbrica). El término, actualmente, se utiliza para designar a los primeros sistemas de telegrafía "radial" que se comunicaban a través de ondas de radio, y aunque el término se originó en el siglo XIX, también fue utilizado para varias técnicas experimentales de comunicación por telégrafo sin hilos, tales como la telegrafía fotoeléctrica y la inductiva.​​ El primer radiotransmisor y radioreceptor práctico fue inventado en 1894 por Guillermo Marconi, que usaba telegrafía "radial". La telegrafía sin hilos fue el único tipo de transmisión radial durante las tres primeras décadas de la radio, llamados estos años la "era de telegrafía inalámbrica", hasta la Primera Guerra Mundial, cuando el Telegraf nirkabel adalah telegrafi elektrik yang tidak membutuhkan kabel untung menghubungkan masing-masing perangkat. Telegraf nirkabel lebih dikenal dalam menyebutkan sistem radio telegrafi awal yang menggunakan komunikasi dalam bentuk gelombang radio. Meskipun saat pertama kali istilah ini muncul pada akhir abad ke 19 istilah ini juga merujuk pada berbagai teknik eksperimental dalam mengkomunikasikan telegraf secara nirkabel, seperti fotolistrik dan telegrafi induksi. Wireless telegraphy or radiotelegraphy is transmission of text messages by radio waves, analogous to electrical telegraphy using cables. Before about 1910, the term wireless telegraphy was also used for other experimental technologies for transmitting telegraph signals without wires. In radiotelegraphy, information is transmitted by pulses of radio waves of two different lengths called "dots" and "dashes", which spell out text messages, usually in Morse code. In a manual system, the sending operator taps on a switch called a telegraph key which turns the transmitter on and off, producing the pulses of radio waves. At the receiver the pulses are audible in the receiver's speaker as beeps, which are translated back to text by an operator who knows Morse code. La télégraphie sans fil, également appelée TSF et radiotélégraphie permet d'écrire à distance en utilisant des ondes électromagnétiques (sans fil télégraphique).Pour transmettre des messages, la télégraphie sans fil utilise l'alphabet Morse, dans lequel les lettres sont représentées par des combinaisons de signaux longs ou traits et de signaux courts ou points. À l'aide d'un manipulateur morse, on fait correspondre à ces signaux des émissions de séries d'étincelles courtes ou longues.La première conférence radiotélégraphique internationale organisée en 1903 à Berlin a abouti aux premières bandes marines, puis dès 1912 aux bandes de TSF aux longueurs d'onde partagées entre services (la longueur d'onde est l'unité couramment utilisée jusqu'aux années 1960 où l'usage de la fréquence devient p 無線電信(むせんでんしん、英語: wireless telegraphy, radiotelegraphy)とは、電波により信号が送信される電信である。wireless telegraphy(無線電信)という用語は、1910年頃以降はもっぱら電波(radio)による電信を指すようになったが、それ以前は、電磁誘導やなど、電線を使わずに電信信号を伝送する様々な実験技術を指す言葉としても使用されていた。無電(むでん)と略されることがある。 Радіотелеграф, застарілий бездротовий телеграф — пристрій, призначений для передачі текстової інформації по радіо за допомогою азбуки (коду) Морзе чи іншого простого коду. На початку розвитку радіозв'язку телеграф був фактично єдиним способом передачі інформації по радіо. Незважаючи на появу нових, набагато більш ефективних способів, радіотелеграф використовується до цих пір ентузіастами-аматорами, різними радіомаяками, і рідше — в службовому зв'язку. 無線電報是一種使用無線電波傳遞電報的技術。最早的無線電報收發器由古列尔莫·马可尼發明於1894年,隨後成為電報的主要收發方式。無線電報中,電報的信息由點和杠組成,如摩爾斯電碼。這些點杠是由發報員開關產生的。 20世紀前半期,無線電報多用於商業、軍事、外交通訊。它在兩次世界大戰中發揮了重要作用,但隨著第二次世界大戰的結束和電話普及而消失,之後一般只有才會使用無線電報。 Радиотелегра́ф, устаревшее беспроволочный телеграф — устройство, предназначенное для передачи текстовой информации по радио с помощью азбуки (кода) Морзе или другого простого кода. В начальный период развития радиосвязи телеграф был фактически единственным способом передачи информации по радио. Несмотря на появление новых, гораздо более эффективных способов, радиотелеграф используется до сих пор энтузиастами-любителями, различными радиомаяками, и реже — в служебной связи. إبراق لاسلكي أو تلغراف لاسلكي (بالإنجليزية: Wireless telegraphy)‏ هو مصطلح تاريخي يستخدم اليوم للإشارة إلى التقنيات والتجارب الأولى للراديو، وهو إرسال الإشارات الكهربائية بدون سلك. وخاصة تلك التي جرت في العقود الثلاث الأولى للراديو (1887 إلى 1920) قبل استخدام مصطلح الراديو. وقد اقترن الإبراق اللاسلكي بشفرة مورس في أرسال إشارات الموجات الكهرومغناطيسية مدة طويلة قبل الراديو، وأحيانا يسمي تلغراف بالراديو. La Radiotelegrafia o telegrafia sense fils, consisteix en l'enviament de Missatges Morse a través d'ones de Ràdio. Aquests missatges, normalment constitueixen un telegrama acústic en codi Morse. El 1844 Samuel Morse havia fet la primera tranmissió pública del telègraf elèctric i el codi que porta el seu nom. Guglielmo Marconi va aplicar el codi Morse als experiments de Hertz amb les ones de ràdio. Així es va convertir en l'inventor de la radiotelegrafia. Telegraf bezprzewodowy – radiowe urządzenie nadawczo-odbiorcze, pozwalające na odległość przekazać sygnały radiowe kodem Morse'a. Telegraf „bez drutu” został zbudowany w oparciu o nadajnik i odbiornik Marconiego w roku 1903 przez Juliana Ochorowicza, wynalazcę i konstruktora, a wykorzystany do nadania sygnałów wzywających na pomoc po raz pierwszy przez transatlantyk RMS Republic w styczniu 1906 roku. Radiotelegrafie of draadloze telegrafie is het verzenden van morse-berichten via radiogolven. Deze morse-berichten worden ook wel telegrammen genoemd. Guglielmo Marconi gebruikte morsecode bij zijn experimenten met radiogolven. Hiermee werd hij de uitvinder van de radiotelegrafie. Sendrata telegrafio, aŭ malpli ofte senkabla telegrafio, signifas telesendon de telegrafiaj signaloj pere de radio ondoj; pli specifa termino por tio estas radiotelegrafio. Antaŭ ĉirkaŭ 1910 kiam radio iĝis dominanta, la termino sendrata telegrafio estis uzata ankaŭ por variaj aliaj eksperimentaj teknologioj por elsendi telegrafiajn signalojn sen dratoj, kiel pere de elektromagneta indukto, aŭ grundokonduktaj telegrafiaj sistemoj.
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Typical commercial radiotelegraphy receiver from the first decade of the 20th century. The "dots" and "dashes" of Morse code were recorded in ink on paper tape by a siphon recorder . British Post Office engineers inspect Marconi's transmitter ' and receiver ' on Flat Holm, May 1897
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無線電報是一種使用無線電波傳遞電報的技術。最早的無線電報收發器由古列尔莫·马可尼發明於1894年,隨後成為電報的主要收發方式。無線電報中,電報的信息由點和杠組成,如摩爾斯電碼。這些點杠是由發報員開關產生的。 20世紀前半期,無線電報多用於商業、軍事、外交通訊。它在兩次世界大戰中發揮了重要作用,但隨著第二次世界大戰的結束和電話普及而消失,之後一般只有才會使用無線電報。 Sendrata telegrafio, aŭ malpli ofte senkabla telegrafio, signifas telesendon de telegrafiaj signaloj pere de radio ondoj; pli specifa termino por tio estas radiotelegrafio. Antaŭ ĉirkaŭ 1910 kiam radio iĝis dominanta, la termino sendrata telegrafio estis uzata ankaŭ por variaj aliaj eksperimentaj teknologioj por elsendi telegrafiajn signalojn sen dratoj, kiel pere de elektromagneta indukto, aŭ grundokonduktaj telegrafiaj sistemoj. Radiotelegrafio estis la unua rimedo de radio-komunikado; la unuaj praktikaj radio-elsendiloj kaj -riceviloj inventitaj en 1894-5 fare de Guglielmo Marconi uzis radiotelegrafion. Ĝi plue estis la nura tipo de radioelsendado dum la unuaj tri jardekoj de radio, nome la "epoko de sendrata telegrafio" ĝis la Unua Mondmilito, kiam la disvolvigo de la amplitudmodula (AM) radiotelefonio ebligis, ke sono (aŭdio) estu elsendita pere de radio. La telegrafía sin hilos es la transmisión de señales de telegrafía eléctrica sin cables (comunicación inalámbrica). El término, actualmente, se utiliza para designar a los primeros sistemas de telegrafía "radial" que se comunicaban a través de ondas de radio, y aunque el término se originó en el siglo XIX, también fue utilizado para varias técnicas experimentales de comunicación por telégrafo sin hilos, tales como la telegrafía fotoeléctrica y la inductiva.​​ El primer radiotransmisor y radioreceptor práctico fue inventado en 1894 por Guillermo Marconi, que usaba telegrafía "radial". La telegrafía sin hilos fue el único tipo de transmisión radial durante las tres primeras décadas de la radio, llamados estos años la "era de telegrafía inalámbrica", hasta la Primera Guerra Mundial, cuando el desarrollo de la amplitud modulada (AM) y la radiotelefonía permitía que el sonido pudiese transmitirse por radio. En radiotelegrafía la información se transmite por pulsos de ondas radiales de dos tipos de largura llamadas "puntos" y "rayas", las cuales se traducen en mensajes textuales, como son el código morse. En un sistema manual, el operador pulsa un interruptor conocido como "llave de telégrafo" que permite encender y apagar el transmisor produciendo pulsaciones de ondas radiales. Las pulsadas son recibidas en el speaker del receptor como pitidos, los cuales son traducidos a texto por un operador que conozca el código Morse. Antes de 1910, cuando la radio era ya dominante, el término telegrafía sin hilos se utilizaba para referirse a otras tecnologías experimentales que permitían transmitir señales telegráficas sin cables, como la inducción electromagnética y los sistemas de conducción terrestre de sistemas telegráficos.​​ La radiotelegrafía se utilizaba para la comunicación interpersonal a larga distancia por razones comerciales, diplomáticas y militares durante la primera mitad del siglo XX. Se convirtió en una herramienta estratégicamente importante durante las guerras mundiales pues una nación carente de estaciones radiotelegráficas podía quedarse aislada del resto del mundo si el enemigo le llegaba a cortar los cables submarinos. Cuando comenzaron, alrededor de 1908, las estaciones radiotelegráficas podían enviar telegramas entre países con alrededor de 200 palabras por minuto. La radiotelegrafía se ha transmitido por diferentes métodos de modulación a lo largo de su historia. El primitivo "transmisor de chispa", usado hasta 1920, enviaba ondas amortiguadas, las cuales tenían un gran ancho de banda y tendían a interferir con otras transmisiones. Este tipo de emisión se prohibió en 1930.[cita requerida] Los transmisores de válvula termoiónica que volvieron a usarse después de 1920 transmitían códigos a través de pulsaciones de ondas portadoras sinusoides no moduladas llamadas ondas continuas (CW), lo cual sigue usándose hoy en día. Para hacer las transmisiones CW audibles, el receptor requiere un circuito llamado Beat Frequency Oscillator (BFO). Un tercer tipo de modulación, modulación por desplazamiento de frecuencia (FSK), se utilizaba únicamente por radioteletipos (RTTY). La radiotelegrafía en código morse fue progresivamente sustituida por las redes de radioteletipos en las aplicaciones de mayor volumen de la Segunda Guerra Mundial. Hoy en día está casi obsoleto, y los únicos usos que permanecen son la comunidad de opeardores de radio amateurs y algunos militares entrenados para usos de emergencia. Telegraf nirkabel adalah telegrafi elektrik yang tidak membutuhkan kabel untung menghubungkan masing-masing perangkat. Telegraf nirkabel lebih dikenal dalam menyebutkan sistem radio telegrafi awal yang menggunakan komunikasi dalam bentuk gelombang radio. Meskipun saat pertama kali istilah ini muncul pada akhir abad ke 19 istilah ini juga merujuk pada berbagai teknik eksperimental dalam mengkomunikasikan telegraf secara nirkabel, seperti fotolistrik dan telegrafi induksi. Telegrafi nirkabel berarti kode morse yang di transmisikan melalui gelombang elektromagnetis, yang awalnya disebut 'Gelombang Hertz' dan sejak tahun 1910 disebut secara umum sebagai gelombang radio, membuatnya kemudian disebut sebagai readiotelegraf. 무선전신기(영어: wireless telegraph)란 마르코니가 1896년 발명한 배와 비행기의 을 할 때 이용된 통신기이다. Wireless telegraphy or radiotelegraphy is transmission of text messages by radio waves, analogous to electrical telegraphy using cables. Before about 1910, the term wireless telegraphy was also used for other experimental technologies for transmitting telegraph signals without wires. In radiotelegraphy, information is transmitted by pulses of radio waves of two different lengths called "dots" and "dashes", which spell out text messages, usually in Morse code. In a manual system, the sending operator taps on a switch called a telegraph key which turns the transmitter on and off, producing the pulses of radio waves. At the receiver the pulses are audible in the receiver's speaker as beeps, which are translated back to text by an operator who knows Morse code. Radiotelegraphy was the first means of radio communication. The first practical radio transmitters and receivers invented in 1894–1895 by Guglielmo Marconi used radiotelegraphy. It continued to be the only type of radio transmission during the first few decades of radio, called the "wireless telegraphy era" up until World War I, when the development of amplitude modulation (AM) radiotelephony allowed sound (audio) to be transmitted by radio. Beginning about 1908, powerful transoceanic radiotelegraphy stations transmitted commercial telegram traffic between countries at rates up to 200 words per minute. Radiotelegraphy was used for long-distance person-to-person commercial, diplomatic, and military text communication throughout the first half of the 20th century. It became a strategically important capability during the two world wars since a nation without long-distance radiotelegraph stations could be isolated from the rest of the world by an enemy cutting its submarine telegraph cables. Radiotelegraphy remains popular in amateur radio. It is also taught by the military for use in emergency communications. However, commercial radiotelegraphy is obsolete. Radiotelegrafie of draadloze telegrafie is het verzenden van morse-berichten via radiogolven. Deze morse-berichten worden ook wel telegrammen genoemd. Guglielmo Marconi gebruikte morsecode bij zijn experimenten met radiogolven. Hiermee werd hij de uitvinder van de radiotelegrafie. إبراق لاسلكي أو تلغراف لاسلكي (بالإنجليزية: Wireless telegraphy)‏ هو مصطلح تاريخي يستخدم اليوم للإشارة إلى التقنيات والتجارب الأولى للراديو، وهو إرسال الإشارات الكهربائية بدون سلك. وخاصة تلك التي جرت في العقود الثلاث الأولى للراديو (1887 إلى 1920) قبل استخدام مصطلح الراديو. وقد اقترن الإبراق اللاسلكي بشفرة مورس في أرسال إشارات الموجات الكهرومغناطيسية مدة طويلة قبل الراديو، وأحيانا يسمي تلغراف بالراديو. Радиотелегра́ф, устаревшее беспроволочный телеграф — устройство, предназначенное для передачи текстовой информации по радио с помощью азбуки (кода) Морзе или другого простого кода. В начальный период развития радиосвязи телеграф был фактически единственным способом передачи информации по радио. Несмотря на появление новых, гораздо более эффективных способов, радиотелеграф используется до сих пор энтузиастами-любителями, различными радиомаяками, и реже — в служебной связи. Telegraf bezprzewodowy – radiowe urządzenie nadawczo-odbiorcze, pozwalające na odległość przekazać sygnały radiowe kodem Morse'a. Telegraf „bez drutu” został zbudowany w oparciu o nadajnik i odbiornik Marconiego w roku 1903 przez Juliana Ochorowicza, wynalazcę i konstruktora, a wykorzystany do nadania sygnałów wzywających na pomoc po raz pierwszy przez transatlantyk RMS Republic w styczniu 1906 roku. 無線電信(むせんでんしん、英語: wireless telegraphy, radiotelegraphy)とは、電波により信号が送信される電信である。wireless telegraphy(無線電信)という用語は、1910年頃以降はもっぱら電波(radio)による電信を指すようになったが、それ以前は、電磁誘導やなど、電線を使わずに電信信号を伝送する様々な実験技術を指す言葉としても使用されていた。無電(むでん)と略されることがある。 無線電信は無線通信の最初の手段だった。グリエルモ・マルコーニが1894 - 95年に発明した初の実用的な無線送信機と受信機は、無線電信を使用した。振幅変調(AM)による無線電話の開発によって電波で音声を伝送することが可能になった第一次世界大戦期までの約30年間は、無線で伝送できるのは電信のみであり、この期間は"wireless telegraphy era"(無線電信の時代)と呼ばれる。無線電信では、情報は短点(トン)と長点(ツー)の2つの異なる長さの電波のパルスによって送信され、通常はモールス符号を使用して文字によるメッセージを綴る。手動による電信では、送信側のオペレータは、電鍵(キー)と呼ばれるスイッチを操作して送信機のオンとオフを切り替え、電波のパルスを生成する。受信機では、パルスを受信機のスピーカから聞こえる可聴音に変換し、モールス信号を知っているオペレータによって元のメッセージに変換される。 20世紀前半にかけて、無線電信は長距離の商用、外交用、軍用の文字通信に使用された。これは、2つの世界大戦の間に、戦略的に重要な能力となった。なぜなら、長距離の無線電信局がない国は、敵により海底電信ケーブルが切断されると、世界の他の地域から隔離されてしまうからである。1908年頃から、高出力の大洋横断無線電信局が1分あたり最大200ワードの速度で国際商用電報を送信した。無線電信はその歴史の間にいくつかの異なる変調方式によって送信された。1920年まで使用されていた原始的な火花送信機は、非常に広い帯域幅を持ち混信を起こしやすい傾向がある減衰波を送信した。減衰波を出す送信機は1930年までに使用が禁止された。1920年以降に使用されるようになった真空管送信機は、今日でも使用されている連続波(CW: continuous wave)と呼ばれる無変調の正弦波の搬送波のパルスを出すことができた。受信機でCW送信を聞こえるようにするためには、BFO(うなり周波数発振器)と呼ばれる回路を必要とする。第3の変調方式である(FSK)は、主にラジオテレタイプ(RTTY)によって使用された。第二次世界大戦期には、モールス符号による無線電信はほとんどの分野でラジオテレタイプに置き換えられた。今日では、モールス信号による無線電信は時代遅れのものとみなされており、今なお使用しているのはアマチュア無線のほか、軍隊による非常通信のための訓練くらいである。 Радіотелеграф, застарілий бездротовий телеграф — пристрій, призначений для передачі текстової інформації по радіо за допомогою азбуки (коду) Морзе чи іншого простого коду. На початку розвитку радіозв'язку телеграф був фактично єдиним способом передачі інформації по радіо. Незважаючи на появу нових, набагато більш ефективних способів, радіотелеграф використовується до цих пір ентузіастами-аматорами, різними радіомаяками, і рідше — в службовому зв'язку. La télégraphie sans fil, également appelée TSF et radiotélégraphie permet d'écrire à distance en utilisant des ondes électromagnétiques (sans fil télégraphique).Pour transmettre des messages, la télégraphie sans fil utilise l'alphabet Morse, dans lequel les lettres sont représentées par des combinaisons de signaux longs ou traits et de signaux courts ou points. À l'aide d'un manipulateur morse, on fait correspondre à ces signaux des émissions de séries d'étincelles courtes ou longues.La première conférence radiotélégraphique internationale organisée en 1903 à Berlin a abouti aux premières bandes marines, puis dès 1912 aux bandes de TSF aux longueurs d'onde partagées entre services (la longueur d'onde est l'unité couramment utilisée jusqu'aux années 1960 où l'usage de la fréquence devient prépondérant). La Radiotelegrafia o telegrafia sense fils, consisteix en l'enviament de Missatges Morse a través d'ones de Ràdio. Aquests missatges, normalment constitueixen un telegrama acústic en codi Morse. El 1844 Samuel Morse havia fet la primera tranmissió pública del telègraf elèctric i el codi que porta el seu nom. Guglielmo Marconi va aplicar el codi Morse als experiments de Hertz amb les ones de ràdio. Així es va convertir en l'inventor de la radiotelegrafia.
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