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

IEC 62153-4-7:2015 describes a triaxial method, 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. For the measurement of transfer impedance and screening- or coupling attenuation, only one test set-up is needed. This edition includes the following significant technical changes with respect to the previous edition:
The document is revised and updated. The changes of the revised IEC 62153-4-3:2013, and IEC 62153-4-4:2015, are included. Measurements can be achieved now with mismatch at the generator site, impedance matching devices are not necessary. The contents of the corrigendum of April 2016 have been included in this copy.

Méthodes d'essai des câbles métalliques de communication - 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 jusqu'à 3 GHz et au-dessus - Méthode triaxiale en tubes concentriques

L'IEC 62153-4-7:2015 décrit une méthode triaxiale, qui convient pour déterminer l'impédance surfacique de transfert et/ou l'affaiblissement d'écrantage et l'affaiblissement de couplage de connecteurs équipés d'un écran 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 d'écrantage ou l'affaiblissement de couplage de connecteurs symétriques ou à plusieurs broches et de cordons multiconducteurs. Pour le mesurage de l'impédance de transfert et de l'affaiblissement d'écrantage ou l'affaiblissement de couplage, un seul montage d'essai est nécessaire. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
Le document a été révisé et mis à jour. Les modifications de l'IEC 62153-4-3:2013 et de l'IEC 62153-4-4:2015 sont incluses. Les mesurages peuvent à présent être effectués sans adaptation du côté du générateur, les dispositifs d'adaptation d'impédance ne sont pas nécessaires. Le contenu du corrigendum d'avril 2016 a été pris en considération dans cet exemplaire.

General Information

• Status: Published
• Publication Date: 08-Dec-2015
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• 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: DELPUB - Deleted Publication
• Start Date: 16-Aug-2019
• Completion Date: 23-Jul-2021

Relations

• Amended By: 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
• Corrected By: IEC 62153-4-7:2015/COR1:2016 - Corrigendum 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
• Revises: IEC 62153-4-7:2006 - Metallic communication cable test methods - Part 4-7: Electromagnetic compatibility (EMC) - Test method for measuring the transfer impedance and the screening - or the coupling attenuation - Tube in tube method
• Effective Date: 05-Sep-2023
• Revised: 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
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62153-4-7 ®
Edition 2.0 2015-12
INTERNATIONAL
STANDARD
colour
inside
Metallic communication cable test methods –
Part 4-7: Electromagnetic compatibility (EMC) – Test method for measuring of
transfer impedance Z and screening attenuation a or coupling attenuation a of
T s C
connectors and assemblies up to and above 3 GHz – Triaxial tube in tube
method
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or

your local IEC member National Committee for further information.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]

CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
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latest edition, a corrigenda or an amendment might have been published.

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and withdrawn publications. have been collected from earlier publications of IEC TC 37,

77, 86 and CISPR.
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IEC 62153-4-7 ®
Edition 2.0 2015-12
INTERNATIONAL
STANDARD
colour
inside
Metallic communication cable test methods –

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

transfer impedance Z and screening attenuation a or coupling attenuation a

T s C
of connectors and assemblies up to and above 3 GHz – Triaxial tube in tube

method
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.100; 33.120.10 ISBN 978-2-8322-3054-1

– 2 – IEC 62153-4-7:2015 © IEC 2015

CONTENTS
FOREWORD . 5

INTRODUCTION . 7

1 Scope . 8

2 Normative references . 8

3 Terms and definitions . 8

4 Physical background . 10

5 Principle of the test methods . 10
5.1 General . 10
5.2 Transfer impedance . 12
5.3 Screening attenuation . 12
5.4 Coupling attenuation . 12
6 Test procedure . 13
6.1 General . 13
6.2 Tube in tube procedure . 13
6.3 Test equipment . 14
6.4 Calibration procedure . 15
6.5 Connection between extension tube and device under test . 15
6.6 Dynamic range respectively noise floor . 15
6.7 Impedance matching . 16
6.8 Influence of Adapters . 16
7 Sample preparation . 17
7.1 Coaxial connector or device . 17
7.2 Balanced or multiconductor device . 17
7.3 Cable assembly . 19
8 Measurement of transfer impedance . 19
8.1 General . 19
8.2 Principle block diagram of transfer impedance . 19
8.3 Measuring procedure – Influence of connecting cables . 19
8.4 Measuring . 20
8.5 Evaluation of test results . 20
8.6 Test report . 20

9 Screening attenuation . 21
9.1 General . 21
9.2 Impedance matching . 21
9.2.1 General . 21
9.2.2 Evaluation of test results with matched conditions . 22
9.2.3 Measuring with mismatch. 22
9.2.4 Evaluation of test results . 22
9.3 Test report . 23
10 Coupling attenuation . 23
10.1 Procedure . 23
10.2 Expression of results . 24
10.3 Test report . 24
10.4 Balunless procedure . 25
Annex A (normative) Determination of the impedance of the inner circuit . 26

Annex B (informative) Example of a self-made impedance matching adapter . 27

Annex C (informative) Measurements of the screening effectiveness of connectors

and cable assemblies . 29

C.1 General . 29

C.2 Physical basics . 29

C.2.1 General coupling equation . 29

C.2.2 Coupling transfer function . 31

C.3 Triaxial test set-up . 33

C.3.1 General . 33

C.3.2 Measurement of cable assemblies . 34
C.3.3 Measurement of connectors . 35
C.4 Conclusion . 38
Annex D (informative) Influence of contact resistances . 39
Bibliography . 41

Figure 1 – Definition of Z . 9
T
Figure 2 – Principle of the test set-up to measure transfer impedance and screening or
coupling attenuation of connectors with tube in tube . 11
Figure 3 – Principle of the test set-up to measure transfer impedance and screening
attenuation of a cable assembly . 14
Figure 4 – Principle set-up for verification test . 16
Figure 5 – Preparation of balanced or multiconductor connectors . 18
Figure 6 – Test set-up (principle) for transfer impedance measurement according to
test method B of IEC 62153-4-3 . 19
Figure 7 – Measuring the screening attenuation with tube in tube with impedance
matching device . 21
Figure 8 – Measuring the coupling attenuation with tube in tube and balun . 24
Figure 9 – Typical measurement of a connector of 0,04 m length with 1 m extension
tube . 25
Figure 10 – Measuring the coupling attenuation with multiport VNA (balunless
procedure is under consideration) . 25
Figure B.1 – Attenuation and return loss of a 50 Ω to 5 Ω impedance matching
adapter, log scale . 27
Figure B.2 – Attenuation and return loss of a 50 Ω to 5 Ω impedance matching
adapter, lin scale . 28

Figure C.1 – Equivalent circuit of coupled transmission lines . 30
Figure C.2 – Summing function S . 31
Figure C.3 – Calculated coupling transfer function (l = 1 m; e = 2,3; e = 1; Z = 0) . 32
r1 r2 F
Figure C.4 – Triaxial set-up for the measurement of the screening attenuation a and
S
the transfer impedance Z . 33
T
Figure C.5 – Simulation of a cable assembly (logarithmic scale) . 35
Figure C.6 – Simulation of a cable assembly (linear scale) . 35
Figure C.7 – Triaxial set-up with extension tube for short cable assemblies . 36
Figure C.8 – Triaxial set-up with extension tube for connectors . 36
Figure C.9 – Simulation, logarithmic frequency scale . 37
Figure C.10 – Measurement, logarithmic frequency scale . 37
...

IEC 62153-4-7 ®
Edition 2.0 2015-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Metallic communication cable test methods –
Part 4-7: Electromagnetic compatibility (EMC) – Test method for measuring of
transfer impedance Z and screening attenuation a or coupling attenuation a
T s C
of connectors and assemblies up to and above 3 GHz – Triaxial tube in tube
method
Méthodes d'essai des câbles métalliques de communication –
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 jusqu'à 3 GHz
C
et au-dessus – Méthode triaxiale en tubes concentriques

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

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The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

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documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
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and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

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IEC 62153-4-7 ®
Edition 2.0 2015-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Metallic communication cable test methods –

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

transfer impedance Z and screening attenuation a or coupling attenuation a

T s C
of connectors and assemblies up to and above 3 GHz – Triaxial tube in tube

method
Méthodes d'essai des câbles métalliques de communication –

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 jusqu'à 3 GHz
C
et au-dessus – Méthode triaxiale en tubes concentriques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.100; 33.120.10 ISBN 978-2-8322-3231-6

– 2 – IEC 62153-4-7:2015 © IEC 2015
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references. 8
3 Terms and definitions . 8
4 Physical background . 10
5 Principle of the test methods . 10
5.1 General . 10
5.2 Transfer impedance . 12
5.3 Screening attenuation . 12
5.4 Coupling attenuation . 12
6 Test procedure . 13
6.1 General . 13
6.2 Tube in tube procedure . 13
6.3 Test equipment . 14
6.4 Calibration procedure . 15
6.5 Connection between extension tube and device under test . 15
6.6 Dynamic range respectively noise floor . 15
6.7 Impedance matching . 16
6.8 Influence of Adapters . 16
7 Sample preparation . 17
7.1 Coaxial connector or device . 17
7.2 Balanced or multiconductor device . 17
7.3 Cable assembly . 19
8 Measurement of transfer impedance . 19
8.1 General . 19
8.2 Principle block diagram of transfer impedance . 19
8.3 Measuring procedure – Influence of connecting cables . 19
8.4 Measuring . 20
8.5 Evaluation of test results . 20
8.6 Test report . 20
9 Screening attenuation . 21
9.1 General . 21
9.2 Impedance matching . 21
9.2.1 General . 21
9.2.2 Evaluation of test results with matched conditions . 21
9.2.3 Measuring with mismatch . 22
9.2.4 Evaluation of test results . 22
9.3 Test report . 23
10 Coupling attenuation . 23
10.1 Procedure . 23
10.2 Expression of results . 23
10.3 Test report . 24
10.4 Balunless procedure . 25
Annex A (normative) Determination of the impedance of the inner circuit . 26

Annex B (informative) Example of a self-made impedance matching adapter . 27
Annex C (informative) Measurements of the screening effectiveness of connectors
and cable assemblies . 29
C.1 General . 29
C.2 Physical basics . 29
C.2.1 General coupling equation . 29
C.2.2 Coupling transfer function . 31
C.3 Triaxial test set-up . 33
C.3.1 General . 33
C.3.2 Measurement of cable assemblies . 34
C.3.3 Measurement of connectors . 35
C.4 Conclusion . 38
Annex D (informative) Influence of contact resistances . 39
Bibliography . 41

Figure 1 – Definition of Z .
...

IEC 62153-4-7 ®
Edition 2.1 2018-05
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Metallic communication cable test methods –
Part 4-7: Electromagnetic compatibility (EMC) – Test method for measuring of
transfer impedance Z and screening attenuation a or coupling attenuation a
T s C
of connectors and assemblies up to and above 3 GHz – Triaxial tube in tube
method
Méthodes d'essai des câbles métalliques de communication –
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 jusqu'à 3 GHz
C
et au-dessus – Méthode triaxiale en tubes concentriques

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from

either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or

your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie

et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des

questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 21 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

IEC publications search - webstore.iec.ch/advsearchform IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 67 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

CISPR.
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Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: [e-mail].
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Catalogue IEC - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
Application autonome pour consulter tous les renseignements
Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient 21 000 termes et définitions en anglais
Spécifications techniques, Rapports techniques et autres
et en français, ainsi que les termes équivalents dans 16
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.

Recherche de publications IEC -
Glossaire IEC - std.iec.ch/glossary
webstore.iec.ch/advsearchform
67 000 entrées terminologiques électrotechniques, en anglais
La recherche avancée permet de trouver des publications IEC et en français, extraites des articles Termes et Définitions des
en utilisant différents critères (numéro de référence, texte, publications IEC parues depuis 2002. Plus certaines entrées
comité d’études,…). Elle donne aussi des informations sur les antérieures extraites des publications des CE 37, 77, 86 et
projets et les publications remplacées ou retirées. CISPR de l'IEC.

IEC Just Published - webstore.iec.ch/justpublished Service Clients - webstore.iec.ch/csc
Restez informé sur les nouvelles publications IEC. Just Si vous désirez nous donner des commentaires sur cette
Published détaille les nouvelles publications parues. publication ou si vous avez des questions contactez-nous:
Disponible en ligne et aussi une fois par mois par email. [e-mail].

IEC 62153-4-7 ®
Edition 2.1 2018-05
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Metallic communication cable test methods –

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

transfer impedance Z and screening attenuation a or coupling attenuation a
T s C
of connectors and assemblies up to and above 3 GHz – Triaxial tube in tube

method
Méthodes d'essai des câbles métalliques de communication –

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 jusqu'à 3 GHz
C
et au-dessus – Méthode triaxiale en tubes concentriques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.100.10; 33.120.10 ISBN 978-2-8322-5701-2

IEC 62153-4-7 ®
Edition 2.1 2018-05
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Metallic communication cable test methods –
Part 4-7: Electromagnetic compatibility (EMC) – Test method for measuring of
transfer impedance Z and screening attenuation a or coupling attenuation a
T s C
of connectors and assemblies up to and above 3 GHz – Triaxial tube in tube
method
Méthodes d'essai des câbles métalliques de communication –
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 jusqu'à 3 GHz
C
et au-dessus – Méthode triaxiale en tubes concentriques

– 2 – IEC 62153-4-7:2015+AMD1:2018 CSV

© IEC 2018
CONTENTS
FOREWORD . 5

INTRODUCTION . 7

1 Scope . 8

2 Normative references . 8

3 Terms and definitions . 8

4 Physical background . 10

5 Principle of the test methods . 10
5.1 General . 10
5.2 Transfer impedance . 12
5.3 Screening attenuation . 12
5.4 Coupling attenuation . 12
6 Test procedure . 13
6.1 General . 13
6.2 Tube in tube procedure . 13
6.3 Test equipment . 14
6.4 Calibration procedure . 15
6.5 Connection between extension tube and device under test . 15
6.6 Dynamic range respectively noise floor . 15
6.7 Impedance matching . 16
6.8 Influence of Adapters . 16
7 Sample preparation . 17
7.1 Coaxial connector or device . 17
7.2 Balanced or multiconductor device . 17
7.3 Cable assembly . 19
8 Measurement of transfer impedance . 19
8.1 General . 19
8.2 Principle block diagram of transfer impedance . 19
8.3 Measuring procedure – Influence of connecting cables . 19
8.4 Measuring . 20
8.5 Evaluation of test results . 20
8.6 Test report . 20

9 Screening attenuation . 21
9.1 General . 21
9.2 Impedance matching . 21
9.2.1 General . 21
9.2.2 Evaluation of test results with matched conditions . 21
9.2.3 Measuring with mismatch. 22
9.2.4 Evaluation of test results . 22
9.3 Test report . 23
10 Coupling attenuation . 23
10.1 Procedure . 23
10.2 Expression of results . 23
10.3 Test report . 24
10.4 Balunless procedure . 25

© IEC 2018
Annex A (normative) Determination of the impedance of the inner circuit . 26

Annex B (informative) Example of a self-made impedance matching adapter . 27

Annex C (informative) Measurements of the screening effectiveness of connectors

and cable assemblies . 29

C.1 General . 29

C.2 Physical basics .
...