| 单词 | zero beat |
| 释义 | > as lemmaszero beat zero beat n. (a) Radio a method of reception in which the incoming signal is mixed with a receiver-generated oscillation of the same frequency as the carrier wave, so that no beats (beat n.1 8) are produced; cf. homodyne n. at homo- comb. form 1; (b) (Physics) a condition or arrangement in which two oscillating signals have equal frequencies, or in which the harmonics of one signal form harmonic intervals with those of the other, producing no beats.Often attributive. ΘΚΠ society > communication > telecommunication > [adjective] > beat > zero beat zero beat1920 society > communication > telecommunication > [noun] > signal > frequency or band of frequencies > beat > zero beat zero beat1920 1920 H. J. Van der Bijl Thermionic Vacuum Tube ix. 364 In these experiments the waves were received by the zero beat method. 1928 G. E. Sterling & R. S. Kruse Radio Man. iv. 149 If the local generated frequency is tuned to exactly the same frequency as the received signals..the condition of ‘zero beat’ is said to exist. 1960 A. H. Benade Horns, Strings, & Harmony vi. 130 Suppose we try to tune two strings so that they are an octave apart by adjusting them to ‘zero beat’ while playing them softly. 1982 Amer. Jrnl. Physics 50 137/1 With this arrangement, one can explore the zero-beat situation (when frequencies are matched) as well as a variety of non-zero-beat situations. 2015 J. Purdum & D. Kidder Arduino Projects Amateur Radio xv. 344 Tune the Cub to zero beat on the receiver while transmitting a signal. < as lemmas |
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