Metallic communication cable test methods - Part 4-5: Electromagnetic compatibility (EMC) - Screening or coupling attenuation - Absorbing clamp method (IEC 62153-4-5:2021)

The absorbing clamp method is suitable to determine the screening- or the coupling attenuation of metallic communication cables in the frequency range of 30 MHz to 2400 MHz, depending on the performance of the clamp. It is an alternative method to the the triaxial method of IEC 62153-4-4 or IEC 62153-4-9. Due to the undefined outer circuit of this absorbing clamp method, the test results obtained at different places and laboratories could vary by at least ± 6dB.

Prüfverfahren für metallische Kommunikationskabel - Teil 4-5: Elektromagnetische Verträglichkeit (EMV) - Kopplungsdämpfung oder Schirmdämpfung - Verfahren mit Absorberzangen (IEC 62153-4-5:2021)

Méthodes d'essai des câbles métalliques et autres composants passifs - Partie 4-5: Compatibilité électromagnétique (CEM) - Affaiblissement d'écran ou de couplage - Méthode de la pince absorbante (IEC 62153-4-5:2021)

Preskusne metode za kovinske komunikacijske kable - 4-5. del: Elektromagnetna združljivost (EMC) - Zaslonsko slabljenje ali sklopno slabljenje - Metoda absorpcijske objemke (IEC 62153-4-5:2021)

General Information

Status
Published
Publication Date
18-Oct-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
07-Oct-2021
Due Date
12-Dec-2021
Completion Date
19-Oct-2021

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SLOVENSKI STANDARD
SIST EN IEC 62153-4-5:2021
01-december-2021
Preskusne metode za kovinske komunikacijske kable - 4-5. del: Elektromagnetna
združljivost (EMC) - Zaslonsko slabljenje ali sklopno slabljenje - Metoda
absorpcijske objemke (IEC 62153-4-5:2021)

Metallic communication cable test methods - Part 4-5: Electromagnetic compatibility

(EMC) - Screening or coupling attenuation - Absorbing clamp method (IEC 62153-4-
5:2021)
Prüfverfahren für metallische Kommunikationskabel - Teil 4-5: Elektromagnetische
Verträglichkeit (EMV) - Kopplungsdämpfung oder Schirmdämpfung - Verfahren mit
Absorberzangen (IEC 62153-4-5:2021)

Méthodes d'essai des câbles métalliques et autres composants passifs - Partie 4-5:

Compatibilité électromagnétique (CEM) - Affaiblissement d'écran ou de couplage -
Méthode de la pince absorbante (IEC 62153-4-5:2021)
Ta slovenski standard je istoveten z: EN IEC 62153-4-5:2021
ICS:
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
33.120.10 Koaksialni kabli. Valovodi Coaxial cables. Waveguides
SIST EN IEC 62153-4-5:2021 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 62153-4-5:2021
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SIST EN IEC 62153-4-5:2021
EUROPEAN STANDARD EN IEC 62153-4-5
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2021
ICS 33.120.10; 33.100.10
English Version
Metallic communication cable test methods - Part 4-5:
Electromagnetic compatibility (EMC) - Screening or coupling
attenuation - Absorbing clamp method
(IEC 62153-4-5:2021)

Méthodes d'essai des câbles métalliques de communication Prüfverfahren für metallische Kommunikationskabel - Teil 4-

- Partie 4-5: Compatibilité électromagnétique (CEM) - 5: Elektromagnetische Verträglichkeit (EMV) -

Affaiblissement d'écran ou de couplage - Méthode de la Kopplungsdämpfung oder Schirmdämpfung - Verfahren mit

pince absorbante Absorberzangen
(IEC 62153-4-5:2021) (IEC 62153-4-5:2021)

This European Standard was approved by CENELEC on 2021-09-30. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the

Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 62153-4-5:2021 E
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SIST EN IEC 62153-4-5:2021
EN IEC 62153-4-5:2021 (E)
European foreword

The text of document 46/819/FDIS, future edition 2 of IEC 62153-4-5, prepared by IEC/TC 46 “Cables,

wires, waveguides, RF connectors, RF and microwave passive components and accessories” was

submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 62153-4-5:2021.

The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2022–06–30

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2024–09–30

document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Any feedback and questions on this document should be directed to the users’ national committee. A

complete listing of these bodies can be found on the CENELEC website.
Endorsement notice

The text of the International Standard IEC 62153-4-5:2021 was approved by CENELEC as a

European Standard without any modification.

In the official version, for Bibliography, the following note has to be added for the standard indicated:

IEC 62153-4-3 NOTE Harmonized as EN 62153-4-3
To be published. Stage at the time of publication: prEN 62153-4-3:2021.
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SIST EN IEC 62153-4-5:2021
EN IEC 62153-4-5:2021 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments)

applies.

NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the

relevant EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available

here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60050-726 - International Electrotechnical Vocabulary - -
(IEV) – Part 726: Transmission lines and
waveguides
IEC/TS 62153-4-1 - Metallic communication cable test methods - -
- Part 4–1: Electromagnetic compatibility
(EMC) - Introduction to electromagnetic
screening measurements
CISPR 16-1-3 2004 Specification for radio disturbance and EN 55016-1-3 2006
immunity measuring apparatus and
methods - Part 1–3: Radio disturbance and
immunity measuring apparatus - Ancillary
equipment - Disturbance power
ITU-T G.117 1996 Transmission aspects of unbalance about - -
earth
ITU-T O.9 1999 Measuring arrangements to assess the - -
degree of unbalance about earth
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SIST EN IEC 62153-4-5:2021
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SIST EN IEC 62153-4-5:2021
IEC 62153-4-5
Edition 2.0 2021-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Metallic communication cable test methods –
Part 4-5: Electromagnetic compatibility (EMC) – Screening or coupling
attenuation – Absorbing clamp method
Méthodes d’essai des câbles métalliques de communication –
Partie 4-5: Compatibilité électromagnétique (CEM) – Affaiblissement d’écran ou
de couplage – Méthode de la pince absorbante
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.100.10; 33.120.10 ISBN 978-2-8322-1013-5

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

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN IEC 62153-4-5:2021
– 2 – IEC 62153-4-5:2021 © IEC 2021
CONTENTS

FOREWORD ........................................................................................................................... 4

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 6

4 Principles of the test method ........................................................................................... 7

5 Equipment ....................................................................................................................... 8

5.1 General ................................................................................................................... 8

5.2 Balun requirements ................................................................................................. 9

5.3 TP connecting unit requirements ........................................................................... 11

5.4 Test sample .......................................................................................................... 12

5.4.1 Tested cable length ....................................................................................... 12

5.4.2 Preparation of test sample ............................................................................. 12

6 Test set-up .................................................................................................................... 14

6.1 Test set-up calibration .......................................................................................... 14

6.2 Composite loss of the test set-up .......................................................................... 14

6.2.1 General ......................................................................................................... 14

6.2.2 Reflection loss of the absorbing clamp in the calibration set-up ..................... 15

6.3 Attenuation of the measuring set-up ...................................................................... 16

6.4 Insertion loss of the absorbers .............................................................................. 16

6.5 Test set-up arrangement ....................................................................................... 17

6.5.1 Test set-up verification .................................................................................. 20

6.6 Pulling force on cable ........................................................................................... 20

7 Procedure ...................................................................................................................... 21

7.1 General ................................................................................................................. 21

7.2 Screening attenuation of coaxial respectively quasi coaxial cables ....................... 22

7.2.1 Matched conditions ........................................................................................ 22

7.2.2 Unmatched conditions ................................................................................... 23

7.3 Coupling attenuation of balanced cables ............................................................... 24

7.3.1 Coupling attenuation measurement with balun ............................................... 24

7.3.2 Balunless coupling attenuation measurement − Set-up .................................. 25

7.3.3 Expression of test results .............................................................................. 25

8 Test report ..................................................................................................................... 25

9 Requirement .................................................................................................................. 26

Annex A (normative) Determination of the impedance of the inner circuit ............................. 27

A.1 Determination of impedance of inner circuit .......................................................... 27

A.2 Impedance matching device if Z < 50 Ω ............................................................... 27

A.3 Impedance matching device if Z > 50 Ω ............................................................... 28

Annex B (informative) Example of a self-made impedance matching adapter ....................... 29

Annex C (informative) Evaluation of test results for the coupling attenuation of

balanced cables .................................................................................................................... 31

C.1 Worst case ............................................................................................................ 31

C.2 Examples .............................................................................................................. 31

Annex D (informative) Reflection loss of a junction .............................................................. 34

Annex E (informative) Mixed mode parameters .................................................................... 36

E.1 Definition of mixed mode S-parameters ................................................................. 36

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SIST EN IEC 62153-4-5:2021
IEC 62153-4-5:2021 © IEC 2021 – 3 –

E.2 Reference impedance of VNA ............................................................................... 39

Bibliography .......................................................................................................................... 40

Figure 1 – Measurement of near end screening attenuation, principle ..................................... 9

Figure 2 – Measurement of near end coupling attenuation with balun ................................... 11

Figure 3 – Balunless measuring of near end coupling attenuation with multiport VNA ........... 12

Figure 4 – Termination of a screened symmetrical cable ....................................................... 13

Figure 5 – Preparation of test sample (symmetrical and multi conductor cables) ................... 13

Figure 6 – Calibration set-up ................................................................................................. 15

Figure 7 – Termination during calibration .............................................................................. 15

Figure 8 – Measurement of the insertion loss of an absorber ................................................ 17

Figure 9 – Example of screen connections for screened twisted pair cable

measurement ........................................................................................................................ 18

Figure 10 – Test set-up for near end measurement of symmetrical cable .............................. 19

Figure 11 – Measurement of surface wave at near end of sample, principle .......................... 19

Figure 12 – Measurement of surface wave at far end of sample, principle ............................. 20

Figure 13 – Shielding arrangements for a far end measurement............................................ 21

Figure A.1 – Impedance matching for Z <50 Ω .................................................................... 28

Figure A.2 – Impedance matching for Z >50 Ω .................................................................... 28

Figure B.1 – Attenuation and return loss ............................................................................... 29

Figure B.2 – Attenuation and return loss ............................................................................... 30

Figure C.1 – Example measurement of a foil screen symmetrical cable ................................ 31

Figure C.2 – Example measurement of a well screened symmetrical cable ........................... 32

Figure C.3 – Example measurement of a well screened coaxial cable ................................... 32

Figure C.4 – Frequent measurement error of a symmetrical cable ......................................... 33

Figure C.5 – Frequent measurement error of a symmetrical cable ......................................... 33

Figure D.1 – Source with R and R ....................................................................................... 34

i L

Figure E.1 – Common two-port network ................................................................................ 36

Figure E.2 – Common four port network ................................................................................ 36

Figure E.3 – Physical and logical ports of VNA ..................................................................... 37

Figure E.4 – Nomenclature of mixed mode S-parameters ...................................................... 37

Figure E.5 – Measurement configuration, single ended response .......................................... 38

Figure E.6 – Measurement configuration, differential mode response .................................... 38

Table 1 − Balun performance characteristics (30 MHz to 1,0 GHz) ........................................ 10

Table 2 − Balun performance characteristics (30 MHz to 2,4 GHz) ........................................ 10

Table 3 – TP-connecting unit performance characteristics (30 MHz to 2,4 GHz) .................... 11

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SIST EN IEC 62153-4-5:2021
– 4 – IEC 62153-4-5:2021 © IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
METALLIC COMMUNICATION CABLE TEST METHODS –
Part 4-5: Electromagnetic compatibility (EMC) –
Screening or coupling attenuation – Absorbing clamp method
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

IEC 62153-4-5 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 second edition cancels and replaces the first edition published in 2006. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:
a) reorganisation of clauses and annexes;
b) extension of frequency range to 2,4 GHz;

c) application of a virtual balun respectively balunless test procedure with multiport VNA.

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SIST EN IEC 62153-4-5:2021
IEC 62153-4-5:2021 © IEC 2021 – 5 –
The text of this International Standard is based on the following documents:
FDIS Report on voting
46/819/FDIS 46/829/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.

This standard is intended to be read in conjunction with IEC TS 62153-4-1:2014, which

describes the theoretical background.

A list of all parts in the IEC 62153-4-n series, under the general title: Metallic communication

cable test methods − Electromagnetic Compatibility (EMC) 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 "http://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.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

that it contains colours which are considered to be useful for the correct

understanding of its contents. Users should therefore print this document using a

colour printer.
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SIST EN IEC 62153-4-5:2021
– 6 – IEC 62153-4-5:2021 © IEC 2021
METALLIC COMMUNICATION CABLE TEST METHODS –
Part 4-5: Electromagnetic compatibility (EMC) –
Screening or coupling attenuation – Absorbing clamp method
1 Scope

The absorbing clamp method is suitable to determine the screening- or the coupling-

attenuation of metallic communication cables in the frequency range of 30 MHz to 1 000 MHz

(2 400 MHz), depending on the performance of the clamp. It is an alternative method to the

triaxial method of IEC 62153-4-4 or IEC 62153-4-9. Due to the undefined outer circuit of this

absorbing clamp method, the test results obtained at different places and laboratories could

vary by at least ± 6 dB.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their

content constitutes requirements of this document. For dated references, only the edition

cited applies. For undated references, the latest edition of the referenced document (including

any amendments) applies.

IEC 60050-726, International Electrotechnical Vocabulary (IEV) – Part 726: Transmission

lines and waveguides

IEC TS 62153-4-1, Metallic communication cable test methods – Part 4-1: Electromagnetic

compatibility (EMC) – Introduction to electromagnetic screening measurements

CISPR 16-1-3:2004, Specification for radio disturbance and immunity measuring apparatus

and methods – Part 1-3: Radio disturbance and immunity measuring apparatus – Ancillary

equipment – Disturbance power
ITU-T G.117:1996, Transmission aspects of unbalance about earth

ITU-T O.9:1999, Measuring arrangements to assess the degree of unbalance about earth

3 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 60050-726 and

IEC TS 62153-4-1 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
quasi-coaxial cable

cable construction with two or more inner conductors enclosed by cable screens acting as an

outer conductor, connected together on both ends

Note 1 to entry: Screened balanced or multiconductor cables become a quasi-coaxial system by short circuiting

the inner conductive elements.
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SIST EN IEC 62153-4-5:2021
IEC 62153-4-5:2021 © IEC 2021 – 7 –
4 Principles of the test method

The cable (for unbalanced respectively coaxial cables) or one cable pair (for balanced cables)

is fed with the power P . Due to the electromagnetic coupling between the cable or pair and

the environment, surface waves are exited which propagate in both directions along the

screen surface (or the cable surface where there is not a screen). A surface current

transformer is used for picking up the power of the surface waves in combination with an

absorber (usually a ferrite tube) to suppress unwanted common mode currents. These kinds

of combinations are known as absorbing clamps.

On the basis of the peak values of the measured surface currents, it is possible to calculate

the maximum peak power, P , in the secondary system formed by the screen of the cable

2max
(or the cable itself) and the environment.

The logarithmic ratio of the powers P and P is termed screening or coupling attenuation,

1 2max
expressed in dB.

In case of balunless measurement, coupling attenuation is termed by the logarithmic ratio of

the powers P and P .
diff com,max

For unbalanced (coaxial) or quasicoaxial cables, the measurement result is the screening

attenuation. For balanced (symmetrical) cables, we have to consider two cases:

a) disturbing power fed in differential mode: the measurement result is the coupling

attenuation, which is the combined result of both unbalance attenuation and screening

attenuation;
b) disturbing power fed in common mode: the measurement result is the screening
attenuation.

To measure coupling attenuation, a balanced signal is required to feed the balanced pair

under test. This can be achieved by using a two port VNA and a balun to transform

unbalanced (usually 50 Ω) generator signal into the balanced (usually 100 Ω) signal of the

balanced cable.

Another option is the “balun-less” test method by using a 4 port vector network analyser or

similar test equipment. The preferred method is the balunless (virtual balun) method.

The surface current is measured on a swept-frequency basis with a stationary clamp.

Taking into account the maximum effect of either near or far end surface waves, the coupling

(or the screening attenuation a
attenuation a ) is defined by:
c S
a =10 log (1)
c 10
max PP;
[ ]
2n 2f
where
P is the input power of inner circuit of the sample;
P is the maximum near end coupling peak power;
P is the maximum far end coupling peak power.

A detailed description of the physical background of screening attenuation and coupling

attenuation measurement is given in IEC TS 62153-4-1.
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– 8 – IEC 62153-4-5:2021 © IEC 2021
5 Equipment
5.1 General

The test set-up shall have a noise floor at least 6 dB better than the instrument reading

required for the value to be reported. This means, for instance, that a test with an equipment

dynamic range of at least 115 dB is required for measuring coupling attenuation or screening

attenuation up to approximately 90 dB, when the full attenuation of a normal absorbing clamp

and balun or TP-connecting unit (if applicable) are taken into account. The accuracy of any

equipment shall be better than ± 1 dB.

To measure high values of screening and coupling attenuation, in general higher than 80 dB,

it is recommended to carry out the measurements in a screened room (e.g. anechoic

chamber).

The equipment shall be capable of measuring coupling attenuation or screening attenuation in

the full frequency range from 30 MHz to 1 GHz and/or 500 MHz to 2,4 GHz if not specified

otherwise in the relevant cable specification. For measurements at frequencies above 1 GHz,

it is recommended to use the balunless test procedure.

The measurement set-up can be performed using a network analyser or alternatively a

discrete signal generator and selective measuring receiver.
To measure the coupling attenuation as well as t
...

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