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Hello everyone, today we will learn about the explanation of terms in the oscilloscope application

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In the process of using an oscilloscope, we usually encounter the following nouns

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The first is the average

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The second is called frequency

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The third is peak-to-peak

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The fourth is called trigger level

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The fifth is the time base, volts/grid

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What do these mean?

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First, let's look at the peak-to-peak

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Peak-to-peak value refers to the height difference between the lowest end and the topmost end of the waveform,

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we call it peak-to-peak value

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volts/grid refers to how many volts a grid represents,

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here is set to 2V per grid

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It means that counting from the bottom up, one grid is 2V

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For example, in this waveform, its peak-to-peak value occupies two and a half grids

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On average, one grid is 2V, and two grids are 4V

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Two and a half grids here, so it's about 5V peak-to-peak

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So the peak-to-peak value shown here is 5.2V

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Ok, here's the peak-to-peak and volts/div

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Next is the time base

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The time base is the number of grids horizontally, and the time used by one grid

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The setting here is 500 microseconds, which means counting from left to right,

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so a small grid means 500 microseconds

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The above waveform occupies two grids in one cycle

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So, it takes 1,000 microseconds for one cycle

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One cycle takes 1,000 microseconds, how many cycles are there in one second?

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Calculated to be 1,000 cycles, which is 1,000Hz, which is the frequency

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OK, let's look at its average

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The average value shown here is 2.5 volts

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The average voltage calculation is to multiply the highest voltage 5.2V by the duty cycle of the waveform

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What does duty cycle mean?

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It is in this cycle that the high-level region of the effective cycle accounts for half of the entire cycle,

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that is, 50%

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We multiply the peak-to-peak value by a duty cycle of 50% to get the average, 2.5 volts

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Ok, this is the calculation of the average

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Trigger level, this can be adjusted by the knobs

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The trigger level 2.56 volts refers to this position,

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and the position pointed by the arrow is the trigger level

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It means that when the waveform touches the trigger level during the rising or falling process,

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the screen will be refreshed

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The rising edge trigger is set here,

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which means that when the waveform rises and touches the trigger level of 2.56 volts,

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the screen will be refreshed and the waveform will be displayed

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This is called trigger level

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If we increase the trigger level and it exceeds the peak value of the waveform,

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there will be no waveform displayed on the screen.

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This is the explanation of the average, frequency, peak-to-peak, trigger level, time base, volts/grid

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There is an arrow in the middle, this arrow indicates the trigger position

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Usually we adjust it to the position of 0 in the middle of the screen

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This 1 represents the position of channel 1, which is also placed in the middle 0 position

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we call this the cross

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Ok, this is an explanation of the terms in the oscilloscope application