CW-Continuous Wave (0)

Continuous Wave - gets it's name because the frequency and amplitude are not changed.  The carrier wave is simply turned off and on at different on/off times and rates.  However turning it on and off fast produces a wide bandwidth.   So to keep the bandwith small the buildup and decay of the on/off is reduced so that the bandwidth is pretty much similar to a continuous sinusoidal oscillation. 


Wiki information on CW

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