metabolism
发表于 2025-3-21 17:38:17
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VAN
发表于 2025-3-21 20:39:58
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cultivated
发表于 2025-3-22 02:24:29
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狂热文化
发表于 2025-3-22 07:02:58
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陈腐思想
发表于 2025-3-22 10:46:30
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Corporeal
发表于 2025-3-22 16:13:41
Deflection Amplifiersde ray tube, according to the application for which it is intended and to the design of the tube. It is necessary therefore when examining signals of lower voltage to employ an amplifier. The types of application for which an oscilloscope can be used satisfactorily are limited principally by the cha
LUMEN
发表于 2025-3-22 19:57:11
Operating the Oscilloscope; Setting up and Preliminary Adjustmentsthe oscilloscope where no direct light, either natural or artificial 57), will fall on the screen. To improve the contrast, a filter having a transmission characteristic corresponding to the spectral distribution of the light from the screen (yellow-green, orange or even neutral gray), is usually pl
occult
发表于 2025-3-22 23:26:17
Amplitude Measurementsak resistors for the deflection plates (and also the input resistors of the amplifiers) are in the order of 1 to 10 megohms, the current flowing, and thus the load on the circuit under test, are extremely small .
冬眠
发表于 2025-3-23 02:02:27
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百灵鸟
发表于 2025-3-23 07:01:01
Frequency Measurementscan hardly be achieved by other means. (Except “Absolute frequency measurement with rotating pointer”, p. 360). The accuracy of reading is limited only by the “absolute” limit at which changes in the pattern on the screen can be discerned with sufficient precision. The higher the frequency, the high