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Definition of "Phase Modulation" |
Modulation of the phase angle of a sinusoidal carrier by an amount proportional to the instantaneous value of the modulating wave. / [PM] Angle modulation in which the phase of the carrier is controlled by the modulating waveform. The amplitude of the modulating wave determines the amount of phase shift, and the frequency of the modulation determines how often the phase shifts. / Phase Modulation is a method of impressing data onto an alternating-current waveform by varying the instantaneous phase of the wave. Thisscheme can be used with analog or digital data. / An electronic warfare expendables dispenser, such as an AN/ALE-47 is part of the suite of electronic warfare devices aboard a protected aircraft, ship, or land vehicle. It may be a standalone system, subordinate to an electronic countermeasures suite controller, or the suite controller may manage the expendables. / a type of angle modulation whereby information is encoded onto a carrier wave by modifying its phase angle as a function of time in proportion to the intelligence signal amplitude. |
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