1. Step 1: Open the oscilloscope, as shown in the figure, find the menu, click Enter, and then find the voltage multiple, such as x 10, as shown in the figure below, and enter the following steps.

2. Step 2: After completing the above steps, adjust the probe position of the oscilloscope to X 10, as shown in the figure below, and enter the following steps.

3. Step 3: After completing the above steps, find the calibration interface, clamp the ground wire to the ground, and the probe is located at the 5V interface, as shown in the figure below, and enter the following steps.

4. Step 4: After completing the above steps, press the "autoset" key, as shown below, and enter the following steps.

5. Step 5: After completing the above steps, a 5V rectangular wave appears, as shown in the figure below. In this way, the problem is solved.