radiotelegraphy वाक्य
उदाहरण वाक्य
मोबाइल
- With the development of the arc converter radio transmitter in 1904, continuous wave ( CW ) modulation began to be used for radiotelegraphy.
- Continuous-wave radio was called radiotelegraphy because like the telegraph, it worked by means of a simple switch to transmit Morse code.
- Popular modes of operation include voice communication using amplitude modulation ( AM ), and Morse code using continuous wave ( CW ) radiotelegraphy.
- Tianjin Coastal Radio also provides public maritime correspondence ( CP ) services in voice telephony, radiotelex and radiotelegraphy to ships within its range.
- Radiotelegraphy using Morse code was vital during World War II, especially in carrying messages between the warships and the naval bases of the belligerents.
- Even for a powerful commercial AM broadcast stations, although the radiotelegraphy signals used during the wireless telegraphy era could be received at hundreds of miles,
- To receive radiotelegraphy, the feedback was increased until the tube oscillated, then the oscillation frequency was tuned to one side of the transmitted signal.
- When the United States entered World War I, private radiotelegraphy stations were prohibited, which put an end to several pioneers'work in this field.
- The heterodyne oscillator is the ancestor of the " beat frequency oscillator " ( BFO ) which is used to receive radiotelegraphy in communications receivers today.
- When the United States entered World War I, private radiotelegraphy stations were prohibited, which put an end to Murgaa's pioneer work in this field.
- In addition, rapidly moving armies in the field could not have fought effectively without radiotelegraphy because they moved more rapidly than telegraph and telephone lines could be erected.
- By the 1920s, there was a worldwide network of commercial and government radiotelegraphic stations, plus extensive use of radiotelegraphy by ships for both commercial purposes and passenger messages.
- It was used from about 1910 in a few " superpower " longwave radiotelegraphy stations to transmit transoceanic message traffic by Morse code to similar stations all over the world.
- Morse code has not been used on French ships since 1997 and on U . S . ones since 1999 However, an FCC certificate for radiotelegraphy may still be obtained.
- With the introduction of " wireless " ( radio ) by Guglielmo Marconi in the early 1900s Morse code was quickly adapted to the new radio technology giving rise to radiotelegraphy.
- Radiotelegraphy was also extensively used by warplanes, especially by long-range patrol planes that were sent out by those navies to scout for enemy warships, cargo ships, and troop ships.
- URSI's original objective ( to encourage " scientific studies of radiotelegraphy, especially those which require international cooperation " ) has been broadened to include all radio science, from optical domain.
- URSI was officially created in 1919, during the Constitutive Assembly of the International Research Council ( now ICSU ), based on the earlier ( 1913 1914 ) when the only radio communication system was radiotelegraphy.
- By 1910 communication by Hertzian waves was universally referred to as " radio ", and the term wireless telegraphy has been largely replaced by the more modern term " "'radiotelegraphy "'".
- The station was to carry out operations including participation in exercises through machine gun shooting, dropping of dummy bombs and dummy mines, aerial photography, reconnaissance along the coast from Farsund to Arendal, and radiotelegraphy.
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