Noise around the oscilloscope and its environment

Micsig麦科信

Noise around the oscilloscope and its environment [Copy link]

The function of an oscilloscope is to restore the real signal. The higher the performance of the oscilloscope, the more details of the signal can be observed, and these details are often the key to discovering abnormal problems. Some people always complain about why their newly bought oscilloscope always has so much interference, while his old oscilloscope has a very clean waveform. Is the new oscilloscope broken? In fact, that is because in the actual use of the oscilloscope, the interference in the surrounding environment is real and unavoidable. Low-performance oscilloscopes have low sensitivity. While choosing to ignore this part of the interference, they also miss a lot of useful information of the signal itself, making it impossible to perform effective and correct analysis.
Today, let's take a look at what interference various environments may cause, so that we can take precautions when measuring in the future.

This video tested the following noises in total:
the adapter itself, DC power supply and signal generator, fan, photographic light, I test myself, router, smart watch, smart phone, projector, display, access control, microwave oven