(radio) A modification of amplitude modulation that modulates the output signal on a single sideband only, as opposed to both sidebands.

(radio) A modulation scheme that conveys data by applying amplitude modulation to two carrier waves at once. These two waves, usually sinusoids, are out of phase with each other by 90° and are thus called quadrature carriers. Commonly abbreviated QAM.

plural of single-sideband modulation

plural of quadrature amplitude modulation

plural of phase modulator

plural of lunar module

(astronautics) The spacecraft used in the Apollo missions that was designed for the landing on the surface of the Moon; the lunar excursion module.

plural of pulse modulator

an electronic circuit that causes the phase angle of a modulated wave to vary in accordance with the modulating signal

A device for the pulse modulation of a radio-frequency carrier signal