GB/T 17626.3-2023 PDF English (GB/T 17626.3-2016: Older version)

GB/T17626.3-2023 (GBT17626.3-2023): PDF in English

GB/T 17626.3-2023 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 33.100.20 CCS L 06 GB/T 17626.3-2023 / IEC 61000-4-3:2020 Replacing GB/T 17626.3-2016 Electromagnetic compatibility - Testing and measurement techniques - Part 3: Radiated, radio-frequency, electromagnetic field immunity test [IEC 61000-4-3:2020, Electromagnetic compatibility (EMC) - Part 4-3: Testing and measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test, IDT] ISSUED ON: DECEMBER 28, 2023 IMPLEMENTED ON: JULY 01, 2024 Issued by: State Administration for Market Regulation; Standardization Administration of the People's Republic of China. Table of Contents Foreword ... 5 Introduction ... 10 1 Scope ... 15 2 Normative references ... 16 3 Terms, definitions and abbreviated terms ... 16 3.1 Terms and definitions ... 16 3.2 Abbreviated terms ... 22 4 General ... 23 5 Test levels and frequency ranges ... 23 5.1 Selection of test level ... 23 5.2 Test frequency ranges ... 25 6 Test equipment ... 26 6.1 Test instrumentation ... 26 6.2 Description of the test facility ... 27 6.3 Uniform field area (UFA) ... 28 6.3.1 Characteristics of the UFA ... 28 6.3.2 Constant field strength level setting method ... 32 6.3.3 Constant power level setting method ... 34 7 Test setup ... 35 7.1 General ... 35 7.2 Arrangement of table-top equipment ... 36 7.3 Arrangement of floor-standing equipment ... 39 7.4 Arrangement of wiring ... 40 7.5 Arrangement of human body-mounted equipment ... 41 8 Test procedure ... 41 8.1 General ... 41 8.2 Laboratory reference conditions... 42 8.2.1 General... 42 8.2.2 Climatic conditions ... 42 8.2.3 Electromagnetic conditions ... 42 8.3 Execution of the test ... 42 8.4 Step sizes ... 44 9 Evaluation of test results ... 44 10 Test report ... 45 Annex A (informative) Rationale for the choice of modulation for tests related to the protection against RF emissions from digital radio services ... 47 A.1 Summary of available modulation methods ... 47 A.2 Experimental results ... 48 A.3 Secondary modulation effects ... 51 A.4 Conclusion ... 51 Annex B (informative) Field generating antennas ... 52 B.1 Biconical antenna ... 52 B.2 Log-periodic antenna ... 52 B.3 Combination antennas ... 52 B.4 Horn antenna and double ridge wave guide antenna ... 52 Annex C (informative) Use of anechoic chambers ... 53 C.1 General anechoic chamber information ... 53 C.2 Use of ferrite-lined chambers at frequencies above 1 GHz ... 54 C.2.1 Problems caused by the use of ferrite-lined chambers for radiated field immunity tests at frequencies above 1 GHz ... 54 C.2.2 Solutions to reduce reflections ... 54 Annex D (informative) Amplifier compression and non-linearity ... 56 D.1 Objective of limiting amplifier distortion ... 56 D.2 Possible problems caused by harmonics and saturation... 56 D.3 Limiting the harmonic content in the field ... 57 D.4 Effect of linearity characteristic on the immunity test ... 57 D.4.1 General ... 57 D.4.2 Evaluation method of the linearity characteristic ... 57 Annex E (informative) Guidance for product committees on the selection of test levels ... 61 E.1 General ... 61 E.2 Test levels related to general purposes ... 61 E.3 Test levels related to the protection against RF emissions from digital radio telephones ... 62 E.4 Special measures for fixed transmitters ... 64 Annex F (informative) Selection of test methods ... 65 Annex G (informative) Cable layout details ... 67 G.1 Intentions of EUT setup for radiated immunity test ... 67 G.2 Cable in the field ... 67 G.3 Cables leaving the test area ... 67 G.4 Turning the EUT cabinets ... 68 Annex H (informative) Examples of test setups for large and heavy EUTs ... 69 H.1 EUTs with bottom fed cables ... 69 H.2 EUTs with overhead cables ... 70 H.3 EUTs with multiple cables and AEs ... 71 H.4 Large EUTs with side fed cables and multiple UFA windows ... 72 Annex I (informative) Testing with multiple signals ... 74 I.1 General ... 74 I.2 Intermodulation ... 74 I.3 Power requirements ... 75 I.4 Level setting requirements ... 76 I.5 Linearity and harmonics checks ... 76 I.6 EUT performance criteria with multiple signals ... 77 Annex J (normative) Measurement uncertainty due to test instrumentation ... 78 J.1 General ... 78 J.2 Uncertainty budgets for level setting ... 78 J.2.1 Definition of the measurand ... 78 J.2.2 MU contributors of the measurand ... 78 J.2.3 Calculation examples for expanded uncertainty ... 79 J.2.4 Explanation of terms ... 80 J.3 Application ... 81 J.4 Reference documents ... 81 Annex K (informative) Calibration method for E-field probes ... 82 K.1 Overview ... 82 K.2 Probe calibration requirements ... 82 K.2.1 General ... 82 K.2.2 Calibration frequency range ... 83 K.2.3 Frequency steps ... 83 K.2.4 Field strength... 83 K.3 Requirements for calibration instrumentation ... 84 K.3.1 General ... 84 K.3.2 Harmonics and spurious signals ... 84 K.3.3 Linearity check for probe ... 85 K.3.4 Determination of the gain of the standard horn antennas ... 86 K.4 Field probe calibration in anechoic chambers ... 87 K.4.1 Calibration environments ... 87 K.4.2 Validation of anechoic chambers for field probe calibration ... 87 K.4.3 Probe calibration procedure ... 94 K.5 Other probe calibration environments and methods ... 97 K.5.1 General ... 97 K.5.2 Field probe calibration using TEM cells ... 97 K.5.3 Field probe calibration using waveguide chambers ... 98 K.5.4 Field probe calibration using open-ended waveguides ... 99 K.5.5 Calibration of field probes by gain transfer method ... 99 K.6 Reference documents ... 100 Bibliography ... 101 Foreword This document was drafted in accordance with the rules given in GB/T 1.1-2020 "Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents". This document is Part 3 of GB/T(Z) 17626 "Electromagnetic compatibility - Testing and measurement techniques". The following parts of GB/T(Z) 17626 have been issued: - GB/T 17626.1-2006, Electromagnetic compatibility -- Testing and measurement techniques -- Overview of immunity tests - GB/T 17626.2-2018, Electromagnetic compatibility -- Testing and measurement techniques -- Electrostatic discharge immunity test - GB/T 17626.3-2023, Electromagnetic compatibility -- Testing and measurement techniques -- Part 3: Radiated, radio-frequency, electromagnetic field immunity test - GB/T 17626.4-2018, Electromagnetic compatibility -- Testing and measurement techniques -- Electrical fast transient/burst immunity test - GB/T 17626.5-2019, Electromagnetic compatibility -- Testing and measurement techniques -- Surge immunity test - GB/T 17626.6-2017, Electromagnetic compatibility -- Testing and measurement techniques -- Immunity to conducted disturbances, induced by radio-frequency fields - GB/T 17626.7-2017, Electromagnetic compatibility -- Testing and measurement techniques -- General guide on harmonics and inter-harmonics measurements and instrumentation, for power supply systems and equipment connected thereto - GB/T 17626.8-2006, Electromagnetic compatibility (EMC) -- Part 4-8: Testing and measurement techniques -- Power frequency magnetic field immunity test - GB/T 17626.9-2011, Electromagnetic compatibility -- Testing and measurement techniques -- Pulse magnetic field immunity test - GB/T 17626.10-2017, Electromagnetic compatibility -- Testing and measurement techniques -- Damped oscillatory magnetic field immunity test - GB/T 17626.11-2023, Electromagnetic compatibility -- Testing and measurement techniques -- Part 11: Voltage dips, short interruptions and voltage variations immunity tests for equipment with input current up to 16 A per phase - GB/T 17626.12-2023, Electromagnetic compatibility -- Testing and measurement - GB/T 17626.29-2006, Electromagnetic compatibility (EMC) -- Testing and measurement techniques -- Voltage dips short interruptions and voltage variations on d.c. input power port immunity tests - GB/T 17626.30-2023, Electromagnetic compatibility -- Testing and measurement techniques -- Part 30: Power quality measurement methods - GB/T 17626.31-2021, Electromagnetic compatibility -- Testing and measurement techniques -- Part 31: AC mains ports broadband conducted disturbance immunity test - GB/Z 17626.33-2023, Electromagnetic compatibility -- Testing and measurement techniques -- Part 33: Measurement methods for high-power transient parameters - GB/T 17626.34-2012, Electromagnetic compatibility -- Testing and measurement techniques -- Voltage dips, short interruptions and voltage variations immunity tests for equipment with mains current more than 16 A per phase - GB/T 17626.39-2023, Electromagnetic compatibility -- Testing and measurement techniques -- Part 39: Radiated fields in close proximity immunity test This document replaces GB/T 17626.3-2016 "Electromagnetic compatibility -- Testing and measurement techniques -- Radiated, radio-frequency, electromagnetic field immunity test". Compared with GB/T 17626.3-2016, in addition to the structural and editorial changes, the main technical changes in this document are as follows: - Add the content of immunity test of RF sources adjacent to EUT (see Chapter 1 of this Edition); - Delete the definitions of Ec, Et, independent window method, induction field, Pc and scanning (see 3.10, 3.11, 3.14, 3.15, 3.20, 3.24 of Edition 2016); - Add the definitions of common mode absorption device, intermodulation, modulation factor, and reference ground plane (see 3.1.8, 3.1.17, 3.1.20, 3.1.24 of this Edition); - Add abbreviated terms (see 3.2 of this Edition); - Delete the test levels for digital wireless phones and other radio frequency transmitting devices (see 5.2 of Edition 2016); - Delete the 0.8m requirement for insulating tables and UFAs in the facility layout (see Figure 2 of Edi.......
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