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==References== ==References==


*{{cite web | title = Amateur Radio Service Definitions (47 CFR §97.3) | work = | url = http://frwebgate.access.gpo.gov/cgi-bin/get-cfr.cgi?TITLE=47&PART=97&SECTION=3&TYPE=TEXT | accessdate = August 03 | accessyear = 2005 }} *{{cite web | title = Amateur Radio Service Definitions (47 CFR §97.3) | work = | url = http://frwebgate.access.gpo.gov/cgi-bin/get-cfr.cgi?TITLE=47&PART=97&SECTION=3&TYPE=TEXT | accessmonthday = August 3 | accessyear = 2005 }}


*{{cite web | title = Ham Radio Jargon, Abbreviations and Terminology | work = | url = http://www.ac6v.com/jargon.htm | accessdate = August 03 | accessyear = 2005 }} *{{cite web | title = Ham Radio Jargon, Abbreviations and Terminology | work = | url = http://www.ac6v.com/jargon.htm | accessmonthday = August 3 | accessyear = 2005 }}


{{Morse code}} {{Morse code}}
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{{Amateur-radio-stub}} {{Amateur-radio-stub}}

Revision as of 19:24, 31 March 2008

Passband modulation
Analog modulation
Digital modulation
Hierarchical modulation
Spread spectrum
See also

Modulated continuous wave is defined by the Federal Communications Commission in 47 CFR §97.3(c)(4) as "Tone-modulated international Morse code telegraphy emissions having designators with A, C, D, F, G, H or R as the first symbol; 2 as the second symbol; A or B as the third symbol."

Simply put, MCW uses a fixed audio tone to modulate a carrier wave. This is an older method of sending Morse code, with continuous wave being the more common method used today. MCW is not allowed in the United States on amateur radio frequencies lower than 50 MHz, as it is a very inefficient use of radio spectrum.

See also

References

International Morse code
Transmission methods
Notable signals
Other writing systems
in Morse code
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