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Introduction to the updated contents of the new national standard for electromagnetic compatibility GB 17799.4-202

2023-04-27

　　GB 17799.4-2022 Mandatory implementation as of November 1, 2023

　　The mandatory national standard GB 17799.4-2022 "Electromagnetic Compatibility - General Standard - Part 4: Emission in Industrial Environments" will come into effect officially on November 1, 2023, replacing the original version GB 17799.4-2012. The main changes include four points:

　　Added various regulations for EUT testing setups


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The regulations for average detectors for radiation emission measurements above 1GHz have been added. All results measured using peak detectors are also applicable.

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Added the requirement for a DC power supply (DC) port

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Added provisions regarding the emission limit for polarization within the FAR (Frequency Allocation Regulations)

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