Continuous wave: Difference between revisions
(New page: Abbreviated "'''CW'''." "A continuous wave or continuous waveform (CW) is an electromagnetic wave of constant amplitude and frequency. ... Continuous-wave radio was called radiotelegraph...) |
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Abbreviated "'''CW'''. | Abbreviated "'''CW'''" or "'''C-W'''". | ||
"A continuous wave or continuous waveform (CW) is an electromagnetic wave of constant amplitude and frequency. ... Continuous-wave radio was called radiotelegraphy because like the telegraph, it worked by means of a simple switch to transmit [[Morse code]]. However, instead of controlling the electricity in a cross-country wire, the switch controlled the power sent to a radio transmitter. This mode is still in common use by amateur radio operators."[http://en.wikipedia.org/wiki/Continuous_wave] | "A continuous wave or continuous waveform (CW) is an electromagnetic wave of constant amplitude and frequency. ... Continuous-wave radio was called radiotelegraphy because like the telegraph, it worked by means of a simple switch to transmit [[Morse code]]. However, instead of controlling the electricity in a cross-country wire, the switch controlled the power sent to a radio transmitter. This mode is still in common use by amateur radio operators."[http://en.wikipedia.org/wiki/Continuous_wave] | ||
In the discussion of the final flight, references to CW effectively mean "Morse code communications." | In the discussion of the final flight, references to CW effectively mean "Morse code communications." | ||
"In common usage and practice, C-W designates radiotelegraphy transmission using an unmodulated R-F carrier wave, turned on and off with a telegraph key to form the dits and dahs of Morse code. The 13-series transmitters were originally designed for voice operation only. The one aboard NR16020 was modified for C-W operation, primarily because of the requirement to operate on 500 KHz. This involved two major changes: alteration to the control circuitry; and the addition of a keying relay." | |||
== Related articles == | == Related articles == | ||
* [[Frequency, wavelength, and antenna tuning]]. | * [[Frequency, wavelength, and antenna tuning]]. | ||
* [[Morse code key questions]] | |||
* [[Modulated continuous wave]]. | * [[Modulated continuous wave]]. | ||
<!-- Please leave this category marker at the bottom. You may add this article to other categories if you wish --> | <!-- Please leave this category marker at the bottom. You may add this article to other categories if you wish --> | ||
[[Category:Radio considerations]] | [[Category:Radio considerations]] | ||
Revision as of 03:28, 24 February 2009
Abbreviated "CW" or "C-W".
"A continuous wave or continuous waveform (CW) is an electromagnetic wave of constant amplitude and frequency. ... Continuous-wave radio was called radiotelegraphy because like the telegraph, it worked by means of a simple switch to transmit Morse code. However, instead of controlling the electricity in a cross-country wire, the switch controlled the power sent to a radio transmitter. This mode is still in common use by amateur radio operators."[1]
In the discussion of the final flight, references to CW effectively mean "Morse code communications."
"In common usage and practice, C-W designates radiotelegraphy transmission using an unmodulated R-F carrier wave, turned on and off with a telegraph key to form the dits and dahs of Morse code. The 13-series transmitters were originally designed for voice operation only. The one aboard NR16020 was modified for C-W operation, primarily because of the requirement to operate on 500 KHz. This involved two major changes: alteration to the control circuitry; and the addition of a keying relay."