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BS EN IEC 61000-4-3:2020

BS EN IEC 61000-4-3:2020

$167.15

Electromagnetic compatibility (EMC) – Testing and measurement techniques. Radiated, radio-frequency, electromagnetic field immunity test

Published By Publication Date Number of Pages
BSI 2020 88
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This part of IEC 61000 is applicable to the immunity requirements of electrical and electronic equipment to radiated electromagnetic energy. It establishes test levels and the required test procedures.

The object of this document is to establish a common reference for evaluating the immunity of electrical and electronic equipment when subjected to radiated, radio-frequency electromagnetic fields. The test method documented in this part of IEC 61000 describes a consistent method to assess the immunity of an equipment or system against RF electromagnetic fields from RF sources not in close proximity to the EUT. The test environment is specified in Clause 6.

NOTE 1 As described in IEC Guide 107, this is a basic EMC publication for use by product committees of the IEC. As also stated in Guide 107, the IEC product committees are responsible for determining whether this immunity test standard should be applied or not, and if applied, they are responsible for determining the appropriate test levels and performance criteria. TC 77 and its sub-committees are prepared to co-operate with product committees in the evaluation of the value of particular immunity tests for their products.

NOTE 2 Immunity testing against RF sources in close proximity to the EUT is defined in IEC 61000‑4‑39.

Particular considerations are devoted to the protection against radio-frequency emissions from digital radiotelephones and other RF emitting devices.

NOTE 3 Test methods are defined in this part for evaluating the effect that electromagnetic radiation has on the equipment concerned. The simulation and measurement of electromagnetic radiation is not adequately exact for quantitative determination of effects. The test methods defined in this basic document have the primary objective of establishing an adequate reproducibility of testing configuration and repeatability of test results at various test facilities.

This document is an independent test method. It is not possible to use other test methods as substitutes for claiming compliance with this document.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
7 CONTENTS
11 FOREWORD
13 INTRODUCTION
14 1 Scope
2 Normative references
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
18 3.2 Abbreviated terms
19 4 General
5 Test levels and frequency ranges
5.1 Selection of test level
20 Tables
Table 1 – Test levels
Table 2 – Amplitude modulation characteristics at output of signal generator
21 5.2 Test frequency ranges
Figures
Figure 1 – Definition of the 80 % amplitude modulated (AM) test signal and the waveshapes occurring
22 6 Test equipment
6.1 Test instrumentation
6.2 Description of the test facility
23 6.3 Uniform field area (UFA)
6.3.1 Characteristics of the UFA
Figure 2 – Example of suitable test facility
24 Figure 3 – Level setting setup
25 Figure 4 – Dimensions of sixteen-point uniform field area
26 Figure 5 – Minimum UFA size having a fifth grid point in the centre
27 Table 3 – Requirements for uniform field area for application of full illumination and partial illumination
28 6.3.2 Constant field strength level setting method
Figure 6 – Measuring setup
29 6.3.3 Constant power level setting method
30 7 Test setup
7.1 General
31 7.2 Arrangement of table-top equipment
Figure 7 – Example of EUT setup and cable layout for table top EUT having a cable that leaves the test setup
33 7.3 Arrangement of floor-standing equipment
Figure 8 – Example of EUT setup (top view)
34 7.4 Arrangement of wiring
35 7.5 Arrangement of human body-mounted equipment
8 Test procedure
8.1 General
8.2 Laboratory reference conditions
8.2.1 General
8.2.2 Climatic conditions
8.2.3 Electromagnetic conditions
8.3 Execution of the test
37 8.4 Step sizes
9 Evaluation of test results
10 Test report
39 Annexes
Annex A (informative) Rationale for the choice of modulation for tests related to the protection against RF emissions from digital radio services
A.1 Summary of available modulation methods
40 A.2 Experimental results
Table A.1 – Comparison of modulation methods
41 Table A.2 – Relative interference levels a
42 Table A.3 – Relative immunity levels a
43 A.3 Secondary modulation effects
A.4 Conclusion
44 Annex B (informative) Field generating antennas
B.1 Biconical antenna
B.2 Log-periodic antenna
B.3 Combination antennas
B.4 Horn antenna and double ridge wave guide antenna
45 Annex C (informative) Use of anechoic chambers
C.1 General anechoic chamber information
C.2 Use of ferrite-lined chambers at frequencies above 1 GHz
C.2.1 Problems caused by the use of ferrite-lined chambers for radiated field immunity tests at frequencies above 1 GHz
46 C.2.2 Solutions to reduce reflections
Figure C.1 – Multiple reflections in an existing small anechoic chamber
Figure C.2 – Most of the reflected waves are eliminated(applies for top and side view)
47 Annex D (informative) Amplifier compression and non-linearity
D.1 Objective of limiting amplifier distortion
D.2 Possible problems caused by harmonics and saturation
D.3 Limiting the harmonic content in the field
48 D.4 Effect of linearity characteristic on the immunity test
D.4.1 General
D.4.2 Evaluation method of the linearity characteristic
49 Figure D.1 – Amplifier linearity measurement setup
50 Figure D.2 – Example of linearity curve
Figure D.3 – Example of gain deviation
52 Annex E (informative) Guidance for product committees on the selection of test levels
E.1 General
E.2 Test levels related to general purposes
53 E.3 Test levels related to the protection against RF emissions from digital radio telephones
Table E.1 – Examples of test levels, associated protection distances andperformance criteria
54 E.4 Special measures for fixed transmitters
55 Annex F (informative) Selection of test methods
57 Annex G (informative) Cable layout details
G.1 Intentions of EUT setup for radiated immunity test
G.2 Cable in the field
G.3 Cables leaving the test area
G.4 Turning the EUT cabinets
59 Annex H (informative) Examples of test setups for large and heavy EUTs
H.1 EUTs with bottom fed cables
Figure H.1 – Example of a test setup for EUT with bottom fed underground cables (CMADs not shown)
60 H.2 EUTs with overhead cables
Figure H.2 – Example of a test setup for EUTs with overhead cables
61 H.3 EUTs with multiple cables and AEs
Figure H.3 – Example of a setup of EUTs with multiple cables and AEs
62 H.4 Large EUTs with side fed cables and multiple UFA windows
Figure H.4 – Large EUTs with side fed cables and multiple UFAs
63 Annex I (informative) Testing with multiple signals
I.1 General
I.2 Intermodulation
Figure I.1 – Test frequencies f1 and f2 and intermodulation frequencies of the second and third order
64 I.3 Power requirements
65 I.4 Level setting requirements
I.5 Linearity and harmonics checks
I.6 EUT performance criteria with multiple signals
66 Annex J (informative) Measurement uncertainty due to test instrumentation
J.1 General
J.2 Uncertainty budgets for level setting
J.2.1 Definition of the measurand
J.2.2 MU contributors of the measurand
67 J.2.3 Calculation examples for expanded uncertainty
Figure J.1 – Example of influences upon level setting
Table J.1 – Level setting process
68 J.2.4 Explanation of terms
Table J.2 – Test process
69 J.3 Application
J.4 Reference documents
70 Annex K (informative) Calibration method for E-field probes
K.1 Overview
K.2 Probe calibration requirements
K.2.1 General
K.2.2 Calibration frequency range
K.2.3 Frequency steps
71 K.2.4 Field strength
K.3 Requirements for calibration instrumentation
K.3.1 General
K.3.2 Harmonics and spurious signals
Table K.1 – Calibration field strength level
72 K.3.3 Linearity check for probe
Table K.2 – Example for the probe linearity check
73 K.3.4 Determination of the gain of the standard horn antennas
Figure K.1 – Example of linearity for probe
74 K.4 Field probe calibration in anechoic chambers
K.4.1 Calibration environments
K.4.2 Validation of anechoic chambers for field probe calibration
75 Figure K.2 – Setup for measuring net power to a transmitting device
77 Figure K.3 – Test setup for chamber validation test
Figure K.4 – Detail for measurement position (L
78 Figure K.5 – Example of data adjustment
79 Figure K.6 – Example of the test layout for antenna and probe
Figure K.7 – Test setup for chamber validation test
80 K.4.3 Probe calibration procedure
Figure K.8 – Example of alternative chamber validation data
81 Figure K.9 – Field probe calibration layout
Figure K.10 – Field probe calibration layout (top view)
82 K.5 Other probe calibration environments and methods
K.5.1 General
K.5.2 Field probe calibration using TEM cells
83 K.5.3 Field probe calibration using waveguide chambers
Figure K.11 – Cross-sectional view of a waveguide chamber
84 K.5.4 Field probe calibration using open-ended waveguides
K.5.5 Calibration of field probes by gain transfer method
K.6 Reference documents
86 Bibliography

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