phase modulationn.

Brit.

/ˌfeɪz mɒdjᵿˈleɪʃn/,

/ˌfeɪz mɒdʒᵿˈleɪʃn/, U.S.

/ˈˌfeɪz ˌmɑdʒəˈleɪʃ(ə)n/

Origin: Formed within English, by compounding. Etymons: phase n.², modulation n.

Etymology: < phase n.² + modulation n.

Electronics and Telecommunications.

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

ΘΚΠ

society > communication > telecommunication > [noun] > signal > modulation

choke control1909

modulation1919

frequency modulation1922

pulse modulation1929

phase modulation1930

undermodulation1940

pulse time modulation1944

pulse position modulation1945

PCM1947

pulse amplitude modulation1947

pulse code modulation1947

pulse frequency modulation1950

pulse width modulation1953

pulse duration modulation1956

1930 Proc. IRE 18 633 (heading) The effect of frequency or ‘phase’ modulation upon signal quality.

1941 Electronic Engin. 14 537/3 Phase modulation possesses much the same advantages as frequency modulation. Signal-to-noise ratio is greater than for amplitude modulation..though it is less than for frequency modulation.

1974 P. K. Harvey & K. J. Bohlman Stereo F.M. Radio Handbk. ii. 36 It is a characteristic of phase modulation that the amount of frequency swing introduced is proportional not only to the amplitude of the modulating signal but also to its frequency.

2004 Flow Measurem. & Instrumentation 15 31/2 For ultrasonic sensors, the phase modulation of the recorded wave train..is inversely proportional to the square of the velocity of sound in the fluid.

This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).

单词	phase modulation
释义	phase modulationn. Brit. /ˌfeɪz mɒdjᵿˈleɪʃn/, /ˌfeɪz mɒdʒᵿˈleɪʃn/, U.S. /ˈˌfeɪz ˌmɑdʒəˈleɪʃ(ə)n/ Origin: Formed within English, by compounding. Etymons: phase n.², modulation n. Etymology: < phase n.² + modulation n. Electronics and Telecommunications. Variation of the phase of a radio signal or other waveform, esp. as a means of carrying information such as an audio signal. ΘΚΠ society > communication > telecommunication > [noun] > signal > modulation choke control1909 modulation1919 frequency modulation1922 pulse modulation1929 phase modulation1930 undermodulation1940 pulse time modulation1944 pulse position modulation1945 PCM1947 pulse amplitude modulation1947 pulse code modulation1947 pulse frequency modulation1950 pulse width modulation1953 pulse duration modulation1956 1930 Proc. IRE 18 633 (heading) The effect of frequency or ‘phase’ modulation upon signal quality. 1941 Electronic Engin. 14 537/3 Phase modulation possesses much the same advantages as frequency modulation. Signal-to-noise ratio is greater than for amplitude modulation..though it is less than for frequency modulation. 1974 P. K. Harvey & K. J. Bohlman Stereo F.M. Radio Handbk. ii. 36 It is a characteristic of phase modulation that the amount of frequency swing introduced is proportional not only to the amplitude of the modulating signal but also to its frequency. 2004 Flow Measurem. & Instrumentation 15 31/2 For ultrasonic sensors, the phase modulation of the recorded wave train..is inversely proportional to the square of the velocity of sound in the fluid. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). < n.1930
随便看	arch-like arch-machine arch-magician arch-magirist arch-marshal arch-mediocrity arch-messenger arch-metaphysician arch-mime arch-minister arch-mistress arch-mock arch-mockery arch-moulding arch-murderer arch-mystagogue arch-mystery arch-nemesis arch-noble arch-order arch-pall arch-papist arch-papistical ardriship ards