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radiotelegraph    
n. 无线电报

无线电报

radiotelegraph
n 1: telegraphy that uses transmission by radio rather than by
wire [synonym: {radiotelegraph}, {radiotelegraphy}, {wireless
telegraphy}]
2: the use of radio to send telegraphic messages (usually by
Morse code) [synonym: {radiotelegraph}, {radiotelegraphy},
{wireless telegraph}, {wireless telegraphy}]


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  • Wireless telegraphy - Wikipedia
    Wireless telegraphy or radiotelegraphy, commonly called CW (continuous wave), ICW (interrupted continuous wave) transmission, or on-off keying, and designated by the International Telecommunication Union as emission type A1A or A2A, is a radio communication method It was transmitted by several different modulation methods during its history
  • Morse Code, Wireless Signals, Radio Waves - Britannica
    Radiotelegraphy, radio communication by means of Morse Code or other coded signals The radio carrier is modulated by changing its amplitude, frequency, or phase in accordance with the Morse dot-dash system or some other code At the receiver the coded modulation is recovered by an appropriate
  • Radiotelegraphic - Definition, Usage Quiz | UltimateLexicon. com
    Radiotelegraphic (adj ) refers to the transmission of telegraphic messages using radio waves instead of traditional wired connections
  • US ARMY SIGNAL CENTER AND SCHOOL - Navy Radio
    Radiotelegraph is one of the oldest and most reliable means of communications Radio­ telegraph (RATG) equipment and procedures are simple and RATG signals travel great dis­
  • The Invention of Radio Technology - ThoughtCo
    Radio technology started as wireless telegraphy and owes its development to telegraph and telephone Guglielmo Marconi was key in proving radio communication's feasibility by sending the first wireless signals The invention of AM radio and FM radio allowed for better and clearer radio broadcasts worldwide
  • History and Development of the Telegraph -- Telegraphy - Edinformatics
    Telegraphy (from the Greek words tele = far away and grapho = write) is the long-distance transmission of written messages without physical transport of letters, originally over wire Radiotelegraphy or wireless telegraphy transmits messages using radio
  • RADIOTELEGRAPHY definition and meaning | Collins English Dictionary
    A type of telegraphy in which messages (usually in Morse code) are transmitted by radio waves; Click for English pronunciations, examples sentences, video
  • radiotelegraphy - The Free Dictionary
    (Telecommunications) a type of telegraphy in which messages (usually in Morse code) are transmitted by radio waves; its use is no longer widespread as it has been superseded by satellite technology Also called: wireless telegraphy
  • ARRL Learning the Radiotelegraph Code - n4mw. com
    This publication contains complete information of interest to those wishing to learn morse code In the years of its publication, 1970 and before, that meant anyone who wished to become an amateur radio operator (Click image for larger view)
  • History of Wireless Telegraph - Wireless Communication
    Marconi patented a complete wireless system in 1897 and he was the first to give a demonstration of wireless telegraphy He built on theoretical work of Maxwell and Hertz to send and receive Morse Code The system used long wave (>> 1 km) signals and spark transmitter technology, requiring very large, high power transmitters





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