modulated continuous wave การใช้

• It was formerly widely used for station identification of non-directional beacons, usually but not exclusively Morse code ( an example of a modulated continuous wave, as opposed to "'A1A "', above ).
• Previously only spark, ICW ( Interrupted Continuous Wave ) signals which were produced by a motor chopping or turning the signal quickly on and off at an audio rate, or modulated continuous wave ( MCW ), could be decoded.