12秋福师《电子测量与仪器》在线作业二（12 autumn Fu division electronic measurement and instrument online homework two）.docVIP

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12秋福师《电子测量与仪器》在线作业二（12 autumn Fu division electronic measurement and instrument online homework two）.doc

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12秋福师《电子测量与仪器》在线作业二（12 autumn Fu division electronic measurement and instrument online homework two） In the first question (D), the resolving power of the direct digital measuring machine is 1ms. If the method of multi cycle measurement is used to improve the resolution of the range to 0.1 Mu s, the chosen cycle times multiply is the planar domain. Second question (A), a 5 bit half DVM, whose basic range is 2V, its calibration factor (i.e., the voltage value represented by each word) is () mV/. The frequency of the intersection of the frequency measurement error curve and the quantization error curve of the third question (D) is called (). The fourth question (D) uses a reciprocal counter to measure the frequency of a low frequency signal in a universal counter. Fifth question (A) which of the following methods does not reduce the quantization error: () mv/?. The sixth item (A) measures the random error of the same quantity several times under the same conditions. The seventh question (D) is the following digital measurement of impedance. The eighth question (B) is the factor of waveform. The ninth question (A) is that the information of subject epistemology is much richer than that of object epistemology. Not because: (). The tenth question (C) instrument usually operates in (or) meets the specified performance. The eleventh (A) correction value is the absolute value of the absolute error. Twelfth (A) impedance measurements range in frequency from DC to 300MHz and impedance measurement is () Question thirteenth (C) of the following methods, which can reduce system errors. The fourteenth question (C) is that the following elements do not belong to the basic elements of measurement. Fifteenth question (A) when the scanning speed of the oscilloscope is 20 cm/s, the sine signal is exactly displayed on the screen. If the 4 complete periods of the signal are displayed, the scanning speed should be (). The sixteenth factor (C), the crest factor of AC voltage, is defined a