CISPR 16-1-4:2025
(Main)Specification for radio disturbance and immunity measuring apparatus and methods - Part 1-4: Radio disturbance and immunity measuring apparatus - Antennas and test sites for radiated disturbance measurements
Specification for radio disturbance and immunity measuring apparatus and methods - Part 1-4: Radio disturbance and immunity measuring apparatus - Antennas and test sites for radiated disturbance measurements
CISPR 16-1-4:2025 specifies the characteristics and performance of equipment for the measurement of radiated disturbances in the frequency range 9 kHz to 18 GHz. Specifications for antennas and test sites are included.
NOTE In accordance with IEC Guide 107. CISPR 16-1-4 is a basic EMC publication for use by product committees of the IEC. As stated in Guide 107, product committees are responsible for determining the applicability of the EMC standard. CISPR and its sub-committees are prepared to cooperate with product committees in the evaluation of the value of particular EMC tests for specific products.
The requirements of this publication apply at all frequencies and for all levels of radiated disturbances within the CISPR indicating range of the measuring equipment. Methods of measurement are covered in CISPR 16-2-3, further information on radio disturbance is given in CISPR TR 16-3, and uncertainties, statistics, and limit modelling are covered in CISPR 16-4 series. This fifth edition cancels and replaces the fourth edition published in 2019, Amendment 1:2020 and Amendment 2:2023. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) revision of the definition 3.1.7 and of the general introduction 8.1.1 for CMAD;
b) introduction of a new cable termination device, the very high frequency line impedance stabilization network (VHF-LISN) in 8.2;
c) addition of definition 3.1.34 for VHF-LISN, 3.1.20 for reference ground, 3.1.21 for reference ground plane and 3.1.31 for TN‑C‑S power system;
d) various non-technical editorial, style, and wording adjustments for consistency with drafting rules.
Spécifications des méthodes et des appareils de mesure des perturbations radioélectriques et de l'immunité aux perturbations radioélectriques - Partie 1-4: Appareils de mesure des perturbations radioélectriques et de l'immunité aux perturbations radioélectriques - Antennes et emplacements d'essai pour les mesurages des perturbations rayonnées
La CISPR 16-1-4:2025 spécifie les caractéristiques et les performances des appareils de mesure de perturbations rayonnées dans la gamme de fréquences de 9 kHz à 18 GHz. Elle comprend les spécifications pour les antennes et les emplacements d'essai.
NOTE Conformément au Guide 107 de l'IEC, la CISPR 16-1-4 est une publication fondamentale en CEM destinée à être utilisée par les comités de produits de l'IEC. Comme indiqué dans le Guide 107, les comités de produits ont la responsabilité de déterminer s'il convient d'appliquer ou non cette norme d'essai en CEM. Le CISPR et ses sous-comités sont prêts à coopérer avec les comités de produits à l'évaluation de la valeur des essais d'immunité particuliers pour leurs produits.
Les exigences de cette publication s'appliquent à toutes les fréquences et à tous niveaux de perturbation rayonnée, dans les limites de la plage de lecture des appareils de mesure du CISPR. Les méthodes de mesure sont traitées dans la Partie 2-3, des informations supplémentaires sur les perturbations radioélectriques sont données dans la Partie 3 et les incertitudes, les statistiques et la modélisation des limites sont couvertes par la Partie 4 de la CISPR 16.
Cette cinquième édition annule et remplace la quatrième édition parue en 2019, l'Amendement 1:2020 et l'Amendement 2:2023.Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) révision de la définition 3.1.7 et de l'introduction générale 8.1.1 pour les CMAD;
b) ajout d'un nouveau dispositif de terminaison de câble, le réseau de stabilisation d'impédance de ligne à très haute fréquence (RISL-VHF), au 8.2;
c) ajout des définitions 3.1.34 pour le RISL-VHF, 3.1.20 pour la terre de référence, 3.1.21 pour le plan de masse de référence et 3.1.31 pour le système d'alimentation TN C S;
d) plusieurs ajustements non techniques de la rédaction, du style et de la formulation pour plus de cohérence avec les règles rédactionnelles.
General Information
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Standards Content (Sample)
CISPR 16-1-4 ®
Edition 5.0 2025-10
INTERNATIONAL
STANDARD
REDLINE VERSION
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
Specification for radio disturbance and immunity measuring apparatus and
methods -
Part 1-4: Radio disturbance and immunity measuring apparatus - Antennas and
test sites for radiated disturbance measurements
ICS 33.100.10; 33.100.20 ISBN 978-2-8327-0762-3
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CONTENTS
FOREWORD . 9
1 Scope . 1
2 Normative references . 11
3 Terms, definitions and abbreviated terms . 12
3.1 Terms and definitions. 12
3.2 Abbreviated terms . 18
4 Antennas for measurement of radiated radio disturbance . 19
4.1 General . 19
4.2 Physical parameter (measurand) for radiated disturbance measurements . 19
4.3 Antennas for the frequency range 9 kHz to 150 kHz . 19
4.3.1 General . 19
4.3.2 Magnetic field antenna. 19
4.3.3 Shielding of loop antenna . 21
4.4 Antennas for the frequency range 150 kHz to 30 MHz . 21
4.4.1 Electric field antenna . 21
4.4.2 Magnetic field antenna. 21
4.4.3 Balance and electric field discrimination of antennas . 21
4.5 Antennas for the frequency range 30 MHz to 1 000 MHz . 22
4.5.1 General . 22
4.5.2 Low-uncertainty antenna for use if there is an alleged non-compliance
to the electric disturbance field strength limit . 22
4.5.3 Antenna characteristics . 22
4.5.4 Balance of antenna . 24
4.5.5 Cross-polar response of antenna . 25
4.6 Antennas for the frequency range 1 GHz to 18 GHz . 26
4.6.1 General . 26
4.6.2 Receive antenna . 27
4.7 Special antenna arrangements – large-loop antenna system . 29
5 Test sites for measurement of radio disturbance field strength for the frequency
range of 9 kHz to 30 MHz . 30
5.1 General . 30
5.2 Radio-frequency ambient environment of a test site . 30
5.3 Measurement distance and test volume . 30
5.4 Set-up table and antenna positioner . 30
5.5 Validation procedure of test site . 31
5.5.1 General . 31
5.5.2 Normalized site insertion loss (NSIL) . 35
5.5.3 Reference site method . 35
5.5.4 Acceptance criterion . 36
6 Test sites for measurement of radio disturbance field strength for the frequency
range of 30 MHz to 1 000 MHz . 36
6.1 General . 36
6.2 OATS . 37
6.2.1 General . 37
6.2.2 Weather-protection enclosure . 37
6.2.3 Obstruction-free area . 37
6.2.4 Radio-frequency ambient environment of a test site . 38
6.2.5 Ground plane . 39
6.3 Suitability of other test sites . 39
6.3.1 Other ground-plane test sites . 39
6.3.2 Test sites without ground plane (FAR) . 39
6.4 Test site validations . 40
6.4.1 General . 40
6.4.2 Overview of test site validations . 40
6.5 Basic parameters of the NSA method for OATS and SAC . 41
6.5.1 General equation and table of theoretical NSA values . 41
6.5.2 Antenna calibration . 45
6.6 Reference site method for OATS and SAC . 45
6.6.1 General . 45
6.6.2 Antennas not permitted for RSM measurements . 45
6.6.3 Determination of the antenna pair reference site attenuation on a
REFTS . 46
6.6.4 Determination of the antenna pair reference site attenuation using an
averaging technique on a large OATS . 47
6.7 Validation of an OATS by the NSA method . 50
6.7.1 Discrete frequency method . 50
6.7.2 Swept frequency method . 51
6.8 Validation of a weather-protection-enclosed OATS or a SAC . 52
6.9 Possible causes for exceeding site acceptability limits . 55
6.10 Site validation for FAR sites . 55
6.10.1 General . 55
6.10.2 RSM for FAR sites . 59
6.10.3 NSA method for FAR sites . 61
6.10.4 Site validation criteria for FAR sites . 63
6.11 Evaluation of set-up table and antenna tower . 63
6.11.1 General . 63
6.11.2 Evaluation procedure for set-up table influences. 64
7 Test sites for measurement of radio disturbance field strength for the frequency
range 1 GHz to 18 GHz . 66
7.1 General . 66
7.2 Reference test site . 66
7.3 Test site validation . 66
7.3.1 General . 66
7.3.2 Acceptance criterion for site validation . 68
7.4 Antenna requirements for S standard test procedure . 68
VSWR
7.4.1 General . 68
7.4.2 Transmit antenna . 68
7.4.3 Antennas and test equipment for the S reciprocal test procedure . 71
VSWR
7.5 Required positions for site validation testing . 72
7.5.1 General . 72
7.5.2 Descriptions of S measurement positions in a horizontal plane
VSWR
(Figure 27). 73
7.5.3 Descriptions of S additional measurement positions (Figure 28) . 74
VSWR
7.5.4 Summary of S measurement positions . 74
VSWR
7.6 S site validation – standard test procedure . 77
VSWR
7.7 S site validation – reciprocal test procedure using an isotropic field
VSWR
probe . 78
7.8 S conditional measurement position requirements . 79
VSWR
7.9 S site validation test report . 80
VSWR
7.10 Limitations of the S site validation method . 81
VSWR
7.11 Alternative test sites . 81
8 Cable termination devices used in radiated emission testing . 81
8.1 Common-mode absorption devices . 81
8.1.1 General . 81
8.1.2 CMAD S-parameter measurements .
...
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