Modulated continuous wave: Difference between revisions
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Instead of use on-off to form the dit-dah's of [[Morse code]], MCW turns a tone on and off. | Instead of use on-off to form the dit-dah's of [[Morse code]], MCW turns a tone on and off. | ||
With transmitters that can transmit in various modes, the setting for MCW might be marked "Tone" ([[Mike Everette]], 22 July 1998 [http://www.tighar.org/forum/Highlights1_20/highlights2.html Forum).] | With transmitters that can transmit in various modes, the setting for MCW might be marked "Tone" ([[Mike Everette]], 22 July 1998 [http://www.tighar.org/Projects/Earhart/forum/Highlights1_20/highlights2.html Forum).] | ||
;Greg Moore, 28 Jun 2004 [http://www.tighar.org/forum/Forum_Archives/200406.txt Forum.] | ;Greg Moore, 28 Jun 2004 [http://www.tighar.org/Projects/Earhart/forum/Forum_Archives/200406.txt Forum.] | ||
:Modulated CW is either generated by a tone which modulates the carrier, which is, in essence, simply an AM signal modulated with the tone, and would have no distance advantage over AM. because of the power taken up by the carrier and both sidebands (this is of course, why SSB (Single Sideband) is the voice transmission choice of today, because by suppressing the unwanted sideband and the carrier, one gains 75 percent more power out than with AM phone. | :Modulated CW is either generated by a tone which modulates the carrier, which is, in essence, simply an AM signal modulated with the tone, and would have no distance advantage over AM. because of the power taken up by the carrier and both sidebands (this is of course, why SSB (Single Sideband) is the voice transmission choice of today, because by suppressing the unwanted sideband and the carrier, one gains 75 percent more power out than with AM phone. | ||
Revision as of 17:50, 13 October 2009
Abbreviated "MCW".
"MCW uses a fixed audio tone to modulate a carrier wave."[1]
Instead of use on-off to form the dit-dah's of Morse code, MCW turns a tone on and off.
With transmitters that can transmit in various modes, the setting for MCW might be marked "Tone" (Mike Everette, 22 July 1998 Forum).
- Greg Moore, 28 Jun 2004 Forum.
- Modulated CW is either generated by a tone which modulates the carrier, which is, in essence, simply an AM signal modulated with the tone, and would have no distance advantage over AM. because of the power taken up by the carrier and both sidebands (this is of course, why SSB (Single Sideband) is the voice transmission choice of today, because by suppressing the unwanted sideband and the carrier, one gains 75 percent more power out than with AM phone.
| A1 | Continuous wave (CW) |
| A2 | Modulated continuous wave (MCW) |
| A3 | Voice modulation, radiotelephone |