| 单词 | test signal |
| 释义 | > as lemmastest signal test signal n. a sequence of electrical impulses used for testing purposes in television broadcasting. ΘΚΠ society > communication > broadcasting > television > visual element > [noun] > signals, types, or parts of picture frequency1926 picture signal1927 black level1935 line frequency1936 pedestal1937 line scan1938 picture black1938 white level1938 porch1941 test signal1945 spot wobble1950 luminance1953 1945 Daily Herald 31 Aug. 4/4 The B.B.C. is already sending out test signals on the sound channel. 1975 D. G. Fink Electronics Engineers' Handbk. xxi. 29 The use of test signals must not result in significant degradation of the program transmissions. < as lemmas |
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