How to use an oscilloscope to observe electrical signal waveforms
1. Select Y-axis coupling method
According to the frequency of the signal being measured, set the Y-axis input coupling mode selection "AC-ground-DC" switch to AC or DC.
2. Select Y-axis sensitivity
According to the approximate peak-to-peak value of the signal being measured (if an attenuation probe is used, it should be divided by the attenuation multiple;
When selecting the DC gear for the coupling mode, the superimposed DC voltage value should also be considered) and set the Y-axis sensitivity selection V/div switch (or Y-axis attenuation switch) to the appropriate level.
If you do not need to read the measured voltage value in actual use, you can appropriately adjust the Y-axis sensitivity fine-tuning (or Y-axis gain) knob to display the waveform with the required height on the screen.
3. Select trigger (or sync) signal source and polarity
Usually the trigger (or synchronization) signal polarity switch is placed in the "+" or "-" position.
4. Select scan speed
Set the X-axis scanning speed t/div (or scanning range) switch to the appropriate level based on the approximate value of the period (or frequency) of the signal being measured.
If there is no need to read the test time value in actual use, the sweep speed t/div fine-tuning (or scan fine-tuning) knob can be appropriately adjusted so that the waveform of the required number of cycles for the test can be displayed on the screen.
If what needs to be observed is the edge part of the signal, the sweep speed t/div switch should be set to the fast sweep speed.
5． Input the signal to be measured
After the measured signal is attenuated by the probe (or directly input by the coaxial cable without attenuation, but at this time the input impedance decreases and the input capacitance increases), it is input into the oscilloscope through the Y-axis input terminal.
