Electromagnetic compatibility (EMC) refers to the ability of electrical and electronic equipment to work normally in its electromagnetic environment without causing unbearable electromagnetic interference to anything else in the environment.

So EMC includes EMI (interference) and EMS (suspension), that is, electromagnetic interference and electromagnetic anti-interference. EMI, electromagnetic interference, describes the degree of electromagnetic radiation interference of a product to other products, whether it will affect the normal work of its surrounding environment or other electronic or electrical products in the same electrical environment.

Matters needing attention in the use of common electromagnetic compatibility test equipment

Attention should be paid to selecting a spectrum analyzer with appropriate parameters such as frequency resolution, sensitivity, dynamic range and scanning width according to the test requirements.

Frequency resolution: the minimum spectral line interval that can be resolved, which represents the ability of spectrum analyzer to resolve signals with similar frequencies.

Sensitivity: indicates the ability of spectrum analyzer to measure small signals. The noise level of spectrum analyzer depends on the bandwidth of IF filter, which is generally -80dB~- 130dB.