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Hello everyone, today we will learn how to use the single trigger function of the oscilloscope

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First of all, turn off the cursor mode first, and you don't need to set it for sampling

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Set the display type to vector and turn off the waveform hold function

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Select YT as the format,

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and select about 40% contrast

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display format is set to normal

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press the CH1 button

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Set the coupling to DC, and turn off the bandwidth limit

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Set the volts/ grid adjustment to coarse

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The attenuation factor of the probe is set to 10

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Turn off the waveform inversion function

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Next, press the trigger setting button and set the trigger type to edge trigger

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Trigger channel is selected to CH1

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Slope setting,

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taking the measurement of power supply as an example, we set it to the rising edge

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There are two trigger modes: normal and automatic

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Press this button, it will switch to single trigger function

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Coupling is set to DC

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After these are set, we press this button to set the horizontal position to 0

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After pressing, the arrow will point to the position of 0 in the middle

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The vertical position of channel 1 should also be placed in the middle 0 position

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After these are set up, we will measure the power supply on the back end of the 3.3V and 5V inductors

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The voltage at the rear end of the 3.3V and 5V inductors is relatively high,

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we set the volts/ grid to 2V per grid

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The time base is set to 500 microseconds by default,

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and we can set a time base of 500 microseconds for all power supplies

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The slope is set to trigger on the rising edge,

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and the trigger level is set to 1/3 of the power supply

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The trigger level set here is 1.28V

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This can be higher or lower, but do not exceed the range of the measured voltage

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For example, if we measure a 5V power supply, the trigger level should not exceed 5V,

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and when measuring a 3.3V power supply, the trigger level should not exceed 3.3V

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It is also not possible to adjust the trigger level to a negative number

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After these are all set, do not power on the mainboard

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Now the switch is off and the mainboard is not powered on.

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At this time, we clamp the ground clip of the probe to the ground of the mainboard first,

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and then poke the probe at the back end of the inductor we want to measure

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Next, power on the mainboard

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At this time, we can measure the process of power supply from scratch

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We use the normal trigger method

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Let's try it with a single trigger

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After a single button press, the Ready status will be displayed on the oscilloscope screen

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At this time, poke the probe into the back end of the inductor,

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and then power up the mainboard, you can see the waveform of this power supply

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2V per grid, there are two and a half grids here, exactly 5V power supply