IEC 62153-4-7:2021

Metallic cables and other passive components test methods - Part 4-7: Electromagnetic compatibility (EMC) -Test method for measuring of transfer impedance Z_T and screening attenuation a_S or coupling attenuation a_C of connectors and assemblies - Triaxial tube in tube method

IEC 62153-4-7:2021 is available as IEC 62153-4-7:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 62153-4-7:2021 deals with the triaxial tube in tube method. This triaxial method is suitable to determine the surface transfer impedance and/or screening attenuation and coupling attenuation of mated screened connectors (including the connection between cable and connector) and cable assemblies. This method could also be extended to determine the transfer impedance, coupling or screening attenuation of balanced or multipin connectors and multicore cable assemblies. This third edition cancels and replaces the second edition published in 2015 and its Amendment 1:2018.This edition includes the following significant technical changes with respect to the previous edition:
- Annex E contains informative information about the direct measurement of screening effectiveness of connectors;
- Annex F gives normative information about mixed mode parameters;
- Annex G contains normative information about accessories for measuring coupling attenuation;
- Annex H discusses the low frequency screening attenuation.

Méthodes d’essai des câbles métalliques et autres composants passifs - Partie 4-7: Compatibilité électromagnétique (CEM) - Méthode d’essai pour mesurer l’impédance de transfert, Z_T,et l’affaiblissement d’écrantage, a_S,ou l’affaiblissement de couplage, a_C, des connecteurs et des cordons - Méthode triaxiale en tubes concentriques

IEC 62153-4-7:2021 est disponible sous forme de IEC 62153-4-7:2021 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
L'IEC 62153-4-7:2021 traite de la méthode triaxiale en tubes concentriques. Cette méthode triaxiale convient pour déterminer l’impédance surfacique de transfert et/ou l’affaiblissement d’écrantage et l’affaiblissement de couplage de connecteurs écrantés et accouplés (y compris la connexion entre le câble et le connecteur) et de cordons. Cette méthode pourrait également être étendue pour déterminer l’impédance de transfert, l’affaiblissement de couplage ou l’affaiblissement d’écrantage de connecteurs symétriques ou à plusieurs broches et de cordons multiconducteurs. Cette troisième édition annule et remplace la deuxième édition parue en 2015, et son Amendement 1:2018. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
- l’Annexe E contient des informations relatives au mesurage direct de l’efficacité d’écrantage des connecteurs;
- l’Annexe F donne des informations normatives sur les paramètres du mode mixte;
- l’Annexe G contient des informations normatives concernant les accessoires permettant de mesurer l’affaiblissement de couplage;
- l’Annexe H traite de l’affaiblissement d’écrantage à basse fréquence

General Information

• Status: Published
• Publication Date: 22-Jul-2021
• ICS: 33.100.10 - Emission
• ICS: 33.120.10 - Coaxial cables. Waveguides
• Technical Committee: TC 46 - Cables, wires, waveguides, RF connectors, RF and microwave passive components and accessories
• Drafting Committee: WG 5 - TC 46/WG 5
• Current Stage: PPUB - Publication issued
• Start Date: 06-Aug-2021
• Completion Date: 23-Jul-2021

Relations

• Revises: IEC 62153-4-7:2015 - Metallic communication cable test methods - Part 4-7: Electromagnetic compatibility (EMC) - Test method for measuring of transfer impedance Z_T and screening attenuation a_S or coupling attenuation a_C of connectors and assemblies up to and above 3 GHz - Triaxial tube in tube method
• Effective Date: 05-Sep-2023
• Revises: IEC 62153-4-7:2015/AMD1:2018 - Amendment 1 - Metallic communication cable test methods - Part 4-7: Electromagnetic compatibility (EMC) - Test method for measuring of transfer impedance Z_T and screening attenuation a_S or coupling attenuation a_C of connectors and assemblies up to and above 3 GHz - Triaxial tube in tube method
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62153-4-7
®

Edition 3.0 2021-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside


Metallic cables and other passive components test methods –
Part 4-7: Electromagnetic compatibility (EMC) – Test method for measuring
of transfer impedance Z and screening attenuation a or coupling attenuation
T S
a of connectors and assemblies – Triaxial tube in tube method
C

Méthodes d’essai des câbles métalliques et autres composants passifs –
Partie 4-7: Compatibilité électromagnétique (CEM) – Méthode d’essai pour
mesurer l’impédance de transfert, Z ,et l’affaiblissement d’écrantage, a , ou
T S
l’affaiblissement de couplage, a , des connecteurs et des cordons – Méthode
C
triaxiale en tubes concentriques

IEC 62153-4-7:2021-07(en-fr)

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IEC 62153-4-7

®


Edition 3.0 2021-07




INTERNATIONAL



STANDARD




NORME


INTERNATIONALE

colour

inside










Metallic cables and other passive components test methods –

Part 4-7: Electromagnetic compatibility (EMC) – Test method for measuring

of transfer impedance Z and screening attenuation a or coupling attenuation
T S


a of connectors and assemblies – Triaxial tube in tube method
C



Méthodes d’essai des câbles métalliques et autres composants passifs –


Partie 4-7: Compatibilité électromagnétique (CEM) – Méthode d’essai pour

mesurer l’impédance de transfert, Z ,et l’affaiblissement d’écrantage, a , ou
T S

l’affaiblissement de couplage, a , des connecteurs et des cordons – Méthode
C

triaxiale en tubes concentriques









INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

INTERNATIONALE




ICS 33.100.10; 33.120.10 ISBN 978-2-8322-9988-3




Warning! Make sure that you obtained this publication from an authorized distributor.

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® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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– 2 – IEC 62153-4-7:2021 © IEC 2021
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references. 9
3 Terms and definitions . 10
4 Physical background . 12
5 Principle of the test methods . 12
5.1 General . 12
5.2 Transfer impedance . 13
5.3 Screening attenuation . 13
5.4 Coupling attenuation . 14
6 Test procedure . 15
6.1 General . 15
6.2 Tube in tube procedure . 15
6.3 Test equipment . 16
6.4 Calibration procedure . 16
6.5 Connection between extension tube and device under test . 17
6.6 Dynamic range respectively noise floor . 17
6.7 Impedance matching . 18
6.8 Influence of adapters . 18
7 Sample preparation . 19
7.1 Coaxial connector or device . 19
7.2 Balanced or multiconductor device . 19
7.3 Cable assembly . 21
8 Measurement of transfer impedance . 21
8.1 General . 21
8.2 Principle block diagram of transfer impedance . 21
8.3 Measuring procedure – Influence of connecting cables . 22
8.4 Measuring . 22
8.5 Evaluation of test results . 22
8.6 Test report . 23
9 Screening attenuation . 23
9.1 General . 23
9.2 Impedance matching . 23
9.2.1 General . 23
9.2.2 Evaluation of test results with matched conditions . 24
9.2.3 Measuring with mismatch . 25
9.2.4 Evaluation of test results . 25
9.3 Test report . 25
10 Coupling attenuation . 26
10.1 General . 26
10.2 Procedure for testing connectors . 26
10.3 Procedure for testing cable assemblies . 27
10.4 Evaluation of test results when using a balun . 28
10.5 Evaluation of test results when using a multiport VNA . 28

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IEC 62153-4-7:2021 © IEC 2021 – 3 –
10.6 Test report . 29
Annex A (normative) Determination of the impedance of the inner circuit . 30
Annex B (informative) Example of a self-made impedance matching adapter . 31
Annex C (informative) Measurements of the screening effectiveness of connectors
and cable assemblies . 33
C.1 General . 33
C.2 Physical basics . 33
C.2.1 General coupling equation . 33
C.2.2 Coupling transfer function . 35
C.3 Triaxial test set-up . 37
C.3.1 General . 37
C.3.2 Measurement of cable assemblies . 38
C.3.3 Measurement of connectors . 39
C.4 Conclusion . 42
Annex D (informative) Influence of contact resistances . 43
Annex E (informative) Direct measurement of screening effectiveness of connectors . 45
E.1 Scope . 45
E.2 Test set-up. 45
E.3 Construction details of test set-up . 46
Annex F (normative) Mixed mode S-parameters . 48
F.1 General . 48
F.2 Definition of mixed mode S-parameters . 48
F.3 Reference impedance of a VNA . 51
Annex G (normative) Accessories for measuring coupling attenuation . 52
G.1 TP connecting unit . 52
G.2 Termination of the DUT . 52
G.3 Test adapter . 53
G.3.1 General . 53
G.3.2 Direct feeding with coaxial cables . 53
G.3.3 Balanced feeding cable . 54
G.3.4 Movable short circuit . 54
Annex H (informative) Low frequency screening attenuation . 56
Bibliography . 57

Figure 1 – Definition of Z . 10
T
Figure 2 – Principle of the test set-up to measure transfer impedance and screening or
coupling attenuation of connectors with tube in tube . 13
Figure 3 – Principle of the test set-up to measure transfer impedance and screening
attenuation of a cable assembly . 15
Figure 4 – Principle set-up for verification test . 18
Figure 5 – Preparation of balanced or multiconductor connectors . 21
Figure 6 – Test set-up (principle) for transfer impedance measurement according to
test of IEC 62153-4-3 with load resistor in inner circuit and without damping resistor in
outer circuit . 22
Figure 7 – Measuring the screening attenuation with tube in tube with impedance
matching device . 24
Figure 8 – Coupling attenuation, principle test set-up with 2-port VNA and balun . 26

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– 4 – IEC 62153-4-7:2021 © IEC 2021
Figure 9 – Coupling attenuation, principle set-up with multiport VNA and
TP‑connecting unit . 27
Figure 10 – Coupling attenuation, principle test set-up with multiport VNA and
TP‑connecting unit for measuring complete cable assemblies . 27
Figure 11 – Coupling attenuation, principle test set-up with multiport VNA and
TP‑connecting unit for measuring halved cable assemblies . 28
Figure 12 – Typical measurement of a connector of 0,04 m length with 1 m extension tube . 29
Figure B.1 – Attenuation and return loss of a 50 Ω to 5 Ω impedance matching adapter,
log scale . 31
Figure B.2 – Attenuation and return loss of a 50 Ω to 5 Ω impedance matching adapter,
lin scale . 32
Figure C.1 – Equivalent circuit of coupled transmission lines . 34
Figure C.2 – Summing function S . 35
Figure C.3 – Calculated coupling transfer function (l = 1 m; e = 2,3; e = 1; Z = 0) . 36
r1 r2 F
Figure C.4 – Triaxial set-up for the measurement of the screening attenuation a and
S
the transfer impedance Z . 37
T
Figure C.5 – Simulation of a cable assembly (logarithmic scale) . 39
Figure C.6 – Simulation of a cable assembly (linear scale) . 39
Figure C.7 – Triaxial set-up with extension tube for short cable assemblies . 40
Figure C.8 – Triaxial set-up with extension tube for connectors . 40
Figure C.9 – Simulation, logarithmic frequency scale . 41
Figure C.10 – Measurement, logarithmic frequency scale . 41
Figure C.11 – Simulation, linear frequency scale . 41
Figure C.12 – Measurement, linear frequency scale . 41
Figure C.13 – Simulation, logarithmic frequency scale . 42
Figure C.14 – simulation, linear frequency scale . 42
Figure D.1 – Contact resistances of the test set-up . 43
Figure D.2 – Equivalent circuit of the test set-up . 43
Figure E.1 – Principle of the test set-up to measure transfer impedance and screening
attenuation of a connector . 45
Figure E.2 – Principle of the test set-up to measure transfer impedance and screening
attenuation of a cable assembly . 46
Figure E.3 – Example of sample preparing . 46
Figure E.4 – Screening tube with separate nut . 47
Figure E.5 – Screening fixed with associated nut . 47
Figure F.1 – Common two-port network . 48
Figure F.2 – Common four port network . 48
Figure F.3 – Physical and logical ports of a VNA . 49
Figure F.4 – Nomenclature of mixed mode S-parameters . 49
Figure F.5 – Measurement configuration, single ended response . 50
Figure F.6 – Measurement configuration, differential mode response . 51
Figure G.1 – Termination of the device under test, principle . 53
Figure G.2 – Balunless measurement of coupling attenuation of a balanced connector,
direct feeding, principle . 54
Figure G.3 – Balunless measurement of coupling attenuation of a cable assembly
using balanced feeding cable, principle . 54

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IEC 62153-4-7:2021 © IEC 2021 – 5 –
Figure G.4 – Balunless measurement of coupling attenuation of a cable assembly
using adapters with implemented short circuit, principle . 55
Figure H.1 – Example for a screening attenuation test result of a cable assembly with a
test length of 2 meters . 56

Table 1 – IEC 62153, Metallic communication cable test methods – Test procedures
with triaxial test set-up . 12
Table G.1 – TP-connecting unit performance characteristics (100 kHz to 2 GHz) . 52

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– 6 – IEC 62153-4-7:2021 © IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

METALLIC CABLES AND OTHER PASSIVE
COMPONENTS TEST METHODS –

Part 4-7: Electromagnetic compatibility (EMC) –
Test method for measuring of transfer impedance Z and screening
T
attenuation a or coupling attenuation a of connectors and assemblies –
S C
Triaxial tube in tube method

FOREWORD
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IEC 62153-4-7 has been prepared by IEC technical committee 46: Cables, wires, waveguides,
RF connectors, RF and microwave passive components and accessories. It is an International
Standard.
This third edition cancels and replaces the second edition published in 2015 and its
Amendment 1:2018. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:

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IEC 62153-4-7:2021 © IEC 2021 – 7 –
The document is revised and updated. It now includes IEC 62153-4-7:2015/COR1:2016 and
IEC 62153-4-7:2015/AMD1:2018. Furthermore, the changes of the revised
IEC 62153-4-9:2018 are included.
Measurements of the coupling attenuation can be achieved now by using a mixed mode
network analyser (virtual balun). The following new annexes have been added:
– Annex E contains informative information about the direct measurement of screening
effectiveness of connectors;
– Annex F gives normative information about mixed mode parameters;
– Annex G contains normative information about accessories for measuring coupling
attenuation;
– Annex H discusses the low frequency screening attenuation.
The text of this International Standard is based on the following documents:
FDIS Report on voting
46/812/FDIS 46/820/RVD

Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement,
available at www.iec.ch/members_experts/refdocs. The main document types developed by
IEC are described in greater detail at www.iec.ch/standardsdev/publications.
A list of all parts of the IEC 62153 series, under the general title Metallic cables and other
passive components test methods can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

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