(Also choke-coil.) = choking coil n. at choking, n. 2; choke control (in wireless telegraphy), modulation of the carrier-wave by means of a choke.

Chiefly Physics and Engineering. The process of modulating an electromagnetic wave or other oscillating signal, or a beam, esp. in order to impress…

(a) Modulation of a wave by variation of its frequency. (b) The system of transmission of radio waves, etc., using such modulation. Abbrev. F.M. Cf…

a form of modulation in which a series of initially identical, regularly recurring pulses is varied in some respect (as amplitude or timing), esp…

Variation of the phase of a radio signal or other waveform, esp. as a means of carrying information such as an audio signal.

Modulation that is less than it need be, so that the available capacity of a transmitter or medium is underused or the signal is too weak.

pulse position or pulse width modulation.

a form of pulse modulation in which variations in the signal amplitude are represented by variations in the time position of the pulses relative…

pulse code modulation.

a form of pulse modulation in which variations in the signal amplitude are represented by variations in the amplitude of the pulses; abbreviated PAM.

a form of pulse modulation in which the actual signal amplitude at successive moments is approximated by the nearest in value of a set of permitted…

a form of pulse modulation in which variations in the signal amplitude are represented by variations in the frequency of occurrence of the pulses.

a form of pulse modulation in which variations in the signal amplitude are represented by variations in the width (duration) of the pulses.

= pulse width modulation n.