题目内容
An oscilloscope shows you how voltage varies with time. It plots a voltage against time graph on the screen. The y-axis is voltage and the X-axis is time. This is most useful when you look at varying voltages.
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TIME/DIV stands for "Time per Division". When this is set to 1 second, it means that the dot will move from left to right,taking 10 seconds to move across the screen(if there are 10 division horizontally on the screen)
The Y-POS control allows you to change the vertical scale of the graph drawn on the oscilloscope screen.
A function generator can generate a 1mV 1kHz pulse waveform.
买东西时“货比三家”的思维方式属于( )。
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