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

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

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

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