Oscilloscope setting: the probe input ratio is set to 1:1;Coupling mode select 'ac';If the input bandwidth of the oscilloscope is larger than 20MHz, turn on the bandwidth limit function of the oscilloscope.
Probe selection: the original grounding wire of the probe is replaced by an grounding spring;A fixed test stand can be used on the test line in the factory, and the probe can be directly inserted into the test stand.
Measurement: direct contact or as close as possible to the test point. If the power to be tested needs to be loaded, the wiring should be as short as possible to reduce the noise from the outside of the system to be tested. At the same time, the different test environment also has a great impact on the test results.