This part of GB/T 17626 is applicable to the electromagnetic field radiation immunity requirements of electrical and electronic equipment, specifying the test levels and necessary test procedures. The purpose of this section is to establish a basis for evaluating the immunity of electrical and electronic equipment to radio frequency electromagnetic field radiation. The test methods provided in this section describe the compliance methods for evaluating the immunity of equipment or systems to certain environments. Note 1: As stated in GB/Z18509, this section is a basic EMC publication for use by relevant professional standardization technical committees. At the same time, it is stipulated in GB/Z18509 that the relevant professional standardization technical committees are responsible for determining whether this immunity testing standard is applicable. If applicable, they are responsible for determining the appropriate test level and performance criteria. The National Electromagnetic Compatibility Standardization Technical Committee (SAC/TC 246) and its branches collaborate with relevant professional standardization technical committees to evaluate the test levels and performance criteria for specific immunity tests of their products. This section is applicable to the immunity test to prevent radio frequency electromagnetic fields from all emission sources. Pay special attention to preventing RF radiation from digital wireless telephones and other RF transmission devices. Note 2: This section specifies the test methods for evaluating the degree of influence of EUT under electromagnetic radiation conditions. The simulation and measurement of electromagnetic radiation are not accurate enough to quantitatively determine the extent of this impact. The purpose of the defined experimental method is to establish a method for qualitative analysis that can obtain good repeatability measurement results for various EUTs. This section is an independent testing method. Other test methods cannot be used as substitutes to claim compliance with this part. The following normative references are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. IEC 60050 (161) International Electrotechnical Vocabulary (IEV) Chapter 161; Electromagnetic Compatibility (lEV) - Chapter 161: Electromagnetic Compatibility IEC 61000-4-6 Electromagnetic Compatibility, Part 4-6, Testing and Measurement Techniques - Immunity to Conducted Disturbances Induced by Radio Frequency Fields The following terms and definitions apply to this document. 3.1 Amplitude modulation The process of carrier amplitude changing according to a given pattern. 3.2 Anechoic chamber A shielding chamber installed with absorbing materials to reduce the reflection of internal surface radio waves
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