CISPR 24:2010

Information technology equipment - Immunity characteristics - Limits and methods of measurement

CISPR 24:2010 applies to information technology equipment (ITE) as defined in CISPR 22. The object of this publication is to establish requirements that will provide an adequate level of intrinsic immunity so that the equipment will operate as intended in its environment. The publication defines the immunity test requirements for equipment within its scope in relation to continuous and transient conducted and radiated disturbances, including electrostatic discharges (ESD). Procedures are defined for the measurement of ITE and limits are specified which are developed for ITE within the frequency range from 0 Hz to 400 GHz. For exceptional environmental conditions, special mitigation measures may be required. Owing to testing and performance assessment considerations, some tests are specified in defined frequency bands or at selected frequencies. Equipment which fulfils the requirements at these frequencies is deemed to fulfil the requirements in the entire frequency range from 0 Hz to 400 GHz for electromagnetic phenomena. The test requirements are specified for each port considered. This second edition cancels and replaces the first edition published in 1997, and its Amendments 1(2001) and 2(2002). It is a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- dated references updated;
- option of using a 4 % step size for continuous conducted immunity test deleted;
- revision of Annex A for telephony equipment including methodology for measuring the demodulation from a speaker/hands free device;
- inclusion of new annex related to DSL equipment. The contents of the corrigendum of June 2011 have been included in this copy.

Appareils de traitement de l'information - Caractéristiques d'immunité - Limites et méthodes de mesure

La CISPR 24:2010 s'applique aux appareils de traitement de l'information (ATI) tels que définis dans la CISPR 22. L'objet de cette publication est de définir des exigences qui apportent un niveau approprié d'immunité intrinsèque de façon que l'appareil puisse fonctionner normalement dans son environnement. La publication définit les exigences d'essai d'immunité pour les appareils définis dans le domaine d'application, en matière de perturbations continues et transitoires, conduites et rayonnées, ce qui inclut les décharges électrostatiques (DES). Des procédures sont définies pour la mesure des ATI et des limites leur sont spécifiées dans la gamme des fréquences comprises entre 0 Hz et 400 GHz. Dans des conditions environnementales exceptionnelles, des mesures particulières de protection peuvent être nécessaires. Suite à l'évaluation des essais et des critères d'aptitude, certains essais ne sont définis que dans certaines bandes de fréquences ou à des fréquences particulières. Tout appareil qui satisfait à ces exigences pour ces fréquences est considéré comme satisfaisant aux exigences pour les phénomènes électromagnétiques dans toute la gamme des fréquences comprises entre 0 Hz et 400 GHz. Les exigences d'essai sont spécifiées pour chaque accès considéré. Cette deuxième édition annule et remplace la première édition parue en 1997, son Amendement 1 (2001) et 2 (2002). Elle constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- références datées mises à jour;
- option d'utilisation d'un pas de 4 % pour l'essai d'immunité conduite continu supprimée;
- révision de l'Annexe A pour les appareils de téléphonie, y compris la méthodologie de mesure de la démodulation d'un haut-parleur / dispositif mains libres;
- inclusion d'une nouvelle annexe relative aux appareils DSL. Le contenu du corrigendum de juin 2011 a été pris en considération dans cet exemplaire.

General Information

• Status: Published
• Publication Date: 30-Jul-2020
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 33.100.20 - Immunity
• Technical Committee: I - Electromagnetic compatibility of information technology equipment, multimedia equipment and receivers
• Current Stage: WPUB - Publication withdrawn
• Completion Date: 31-Jul-2020

Standards Content (Sample)

CISPR 24
Edition 2.0 2010-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
COMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES
Information technology equipment – Immunity characteristics – Limits and
methods of measurement
Appareils de traitement de l'information – Caractéristiques d'immunité – Limites
et méthodes de mesure
CISPR 24:2010
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
CISPR 24
Edition 2.0 2010-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
COMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES
Information technology equipment – Immunity characteristics – Limits and
methods of measurement
Appareils de traitement de l'information – Caractéristiques d'immunité – Limites
et méthodes de mesure
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX
ICS 33.100.10 ISBN 978-2-88912-163-2
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – CISPR 24 © IEC:2010
CONTENTS

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

INTRODUCTION.....................................................................................................................6

1 Scope and object ..............................................................................................................7

2 Normative references........................................................................................................7

3 Terms and definitions .......................................................................................................8

4 Immunity test requirements.............................................................................................11

4.1 General .................................................................................................................11

4.2 Particular requirements..........................................................................................11

4.2.1 Electrostatic discharges (ESD)...................................................................11

4.2.2 Electrical fast transients (EFT) ...................................................................12

4.2.3 Continuous radio frequency disturbances ...................................................12

4.2.4 Power-frequency magnetic fields................................................................13

4.2.5 Surges.......................................................................................................13

4.2.6 Voltage dips and interruptions ....................................................................13

5 Applicability ....................................................................................................................13

6 Conditions during testing.................................................................................................14

6.1 General conditions.................................................................................................14

6.2 Particular conditions (EUT operational modes, etc.) ...............................................15

7 Performance criteria .......................................................................................................15

7.1 General performance criteria .................................................................................15

7.2 Performance criterion A .........................................................................................15

7.3 Performance criterion B .........................................................................................15

7.4 Performance criterion C.........................................................................................15

7.5 Particular performance criteria...............................................................................16

8 Product documentation ...................................................................................................16

9 Measurement uncertainty................................................................................................16

10 Immunity requirements ...................................................................................................16

Annex A (normative) Telephony terminal equipment .............................................................19

Annex B (normative) Data processing equipment..................................................................29

Annex C (normative) Local area networks (LAN)...................................................................33

Annex D (normative) Printers and plotters ............................................................................34

Annex E (normative) Copying machines ...............................................................................35

Annex F (normative) Automatic teller machines (ATM)..........................................................36

Annex G (normative) Point of sale terminals (POST) ............................................................38

Annex H (normative) xDSL Terminal equipment....................................................................40

Bibliography ..........................................................................................................................44

Figure 1 – Description of ports ................................................................................................9

Figure A.1 – Example sound coupling set-up between the acoustic output device of a

telephone handset and an artificial ear for detecting demodulated sound pressure level.........21

Figure A.2 – Example test set-up for measuring the sound pressure level from the

acoustic output device of a telephone handset.......................................................................23

Figure A.3 – Test setup for measuring the reference sound pressure level from a

speaker/hands free phone.....................................................................................................24

Figure A.4 – Demodulation on analogue lines, set up.............................................................25

---------------------- Page: 4 ----------------------
CISPR 24 © IEC:2010 – 3 –

Figure A.5 – Example of typical small key telephone system or PABX ....................................27

Figure H.1 – DSL access system configuration ......................................................................40

Table 1 – Immunity, enclosure port........................................................................................16

Table 2 – Immunity, signal ports and telecommunication ports...............................................17

Table 3 – Immunity, input d.c. power port (excluding equipment marketed with a

a.c./d.c. power converter)......................................................................................................17

Table 4 – Immunity, input a.c. power ports (including equipment marketed with a

separate a.c./d.c power converter) ........................................................................................18

Table A.1 – Criteria applied to TTE functions, used during continuous disturbances

testing...................................................................................................................................19

Table A.2 – Maximum acoustic demodulated levels at an ear piece .......................................22

Table A.3 – Maximum acoustic demodulated levels relative to reference level........................23

Table A.4 – Maximum demodulated differential mode signals at analogue ports.....................25

Table A.5 – TTE performance criteria for spot frequency tests ...............................................26

Table A.6 – TTE performance criteria for non-continuous radio frequency disturbances .........26

Table A.7 – Test configurations and performance assessment methods applicable to a

PABX and associated terminals for continuous RF disturbance tests .....................................28

Table H.1 – ITU-T recommendations for xDSL systems .........................................................41

Table H.2 – Example cable attenuation..................................................................................41

---------------------- Page: 5 ----------------------
– 4 – CISPR 24 © IEC:2010
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INFORMATION TECHNOLOGY EQUIPMENT –
IMMUNITY CHARACTERISTICS –
LIMITS AND METHODS OF MEASUREMENT
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.

International Standard CISPR 24 has been prepared by CISPR subcommittee I:

Electromagnetic compatibility of information technology equipment, multimedia equipment and

receivers.

This second edition cancels and replaces the first edition published in 1997, and its

Amendments 1(2001) and 2 (2002). It is a technical revision.

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

edition:
• dated references updated;

• option of using a 4 % step size for continuous conducted immunity test deleted;

• revision of Annex A for telephony equipment including methodology for measuring the

demodulation from a speaker / hands free device;
• inclusion of new annex related to DSL equipment.
---------------------- Page: 6 ----------------------
CISPR 24 © IEC:2010 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
CIS/I/331/FDIS CIS/I/334/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
The contents of the corrigendum of June 2011 have been included in this copy.
---------------------- Page: 7 ----------------------
– 6 – CISPR 24 © IEC:2010
INTRODUCTION

This CISPR publication establishes uniform requirements for the electromagnetic immunity of

information technology equipment. The test methods are given in the referenced Basic EMC

Immunity Standards. This publication specifies applicable tests, test levels, product operating

conditions and assessment criteria.
---------------------- Page: 8 ----------------------
CISPR 24 © IEC:2010 – 7 –
INFORMATION TECHNOLOGY EQUIPMENT –
IMMUNITY CHARACTERISTICS –
LIMITS AND METHODS OF MEASUREMENT
1 Scope and object

This CISPR publication applies to information technology equipment (ITE) as defined in

CISPR 22.

The object of this publication is to establish requirements that will provide an adequate level of

intrinsic immunity so that the equipment will operate as intended in its environment. The

publication defines the immunity test requirements for equipment within its scope in relation to

continuous and transient conducted and radiated disturbances, including electrostatic

discharges (ESD).

Procedures are defined for the measurement of ITE and limits are specified which are

developed for ITE within the frequency range from 0 Hz to 400 GHz.

For exceptional environmental conditions, special mitigation measures may be required.

Owing to testing and performance assessment considerations, some tests are specified in

defined frequency bands or at selected frequencies. Equipment which fulfils the requirements

at these frequencies is deemed to fulfil the requirements in the entire frequency range from

0 Hz to 400 GHz for electromagnetic phenomena.
The test requirements are specified for each port considered.
NOTE 1 Safety considerations are not covered in this publication.

NOTE 2 In special cases, situations will arise where the level of disturbance may exceed the levels specified in

this publication, for example where a hand-held transmitter is used in proximity to equipment. In these instances,

special mitigation measures may have to be employed.
2 Normative references

The following referenced documents are indispensable for the application 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 60050-161:1990, International Electrotechnical Vocabulary (IEV) – Chapter 161:

Electromagnetic compatibility

IEC 60318-1:2009, Electroacoustics – Simulators of human head and ear – Part 1: Ear

simulator for the measurement of supra-aural and circumaural earphones
IEC 61000-4-2:2008, Electromagnetic compatibility (EMC) – Part 4-2: Testing and
measurement techniques – Electrostatic discharge immunity test
IEC 61000-4-3:2006, Electromagnetic compatibility (EMC) – Part 4-3: Testing and

measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test

Amendment 1(2007)
Amendment 2(2010)
IEC 61000-4-4:2004, Electromagnetic compatibility (EMC) – Part 4-4: Testing and
measurement techniques – Electrical fast transient/burst immunity test
---------------------- Page: 9 ----------------------
– 8 – CISPR 24 © IEC:2010
IEC 61000-4-5:2005, Electromagnetic compatibility (EMC) – Part 4-5: Testing and
measurement techniques – Surge immunity test
IEC 61000-4-6:2008, Electromagnetic compatibility (EMC) – Part 4-6: Testing and

measurement techniques – Immunity to conducted disturbances, induced by radio-frequency

fields
IEC 61000-4-8:2009, Electromagnetic compatibility (EMC) – Part 4-8: Testing and
measurement techniques – Power frequency magnetic field immunity test

IEC 61000-4-11:2004, Electromagnetic compatibility (EMC) – Part 4-11: Testing and

measurement techniques – Voltage dips, short interruptions and voltage variations immunity

tests

CISPR 16-1-2:2003, Specification for radio disturbance and immunity measuring apparatus and

methods – Part 1-2: Radio disturbance and immunity measuring apparatus – Ancillary

equipment – Conducted disturbances
Amendment 1(2004)
Amendment 2(2006)

CISPR 20:2006, Sound and television broadcast receivers and associated equipment –

Immunity characteristics – Limits and methods of measurement

CISPR 22:2008, Information technology equipment – Radio disturbance characteristics – Limits

and methods of measurement
3 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 60050-161, and the

following apply.
3.1
degradation

unwanted change in operational performance of an EUT due to electromagnetic disturbances.

This does not necessarily mean malfunction or catastrophic failure
3.2
equipment under test
EUT

representative device or functionally interactive group of devices (that is a system) which

includes one or more host units that is subjected to test procedures specified in this publication

3.3
information technology equipment
ITE
any equipment:

a) which has a primary function of either (or a combination of) entry, storage, display,

retrieval, transmission, processing, switching, or control, of data and of telecommunication

messages and which may be equipped with one or more terminal ports typically operated

for information transfer;
b) with a rated supply voltage not exceeding 600 V.

It includes, for example, data processing equipment, office machines, electronic business

equipment and telecommunication equipment.

Any equipment (or part of the ITE equipment) which has a primary function of radio trans-

mission and/or reception according to the ITU Radio Regulations are excluded from the scope

of this publication.
---------------------- Page: 10 ----------------------
CISPR 24 © IEC:2010 – 9 –

NOTE Any equipment which has a function of radio transmission and/or reception according to the definitions of

the ITU Radio Regulations should fulfil the national radio regulations, whether or not this publication is also valid.

Equipment, for which all disturbance requirements in the frequency range are explicitly formul-

ated in other IEC or CISPR publications, are excluded from the scope of this publication.

[3.1 of CISPR 22:2008]
3.4
jitter (of a cathode ray tube (CRT) monitor)

peak-to-peak variation in the geometric location of picture elements on the viewing surface of

the CRT monitor
3.5
port

particular interface of the specified EUT with the external electromagnetic environment (see

Figure 1)
Enclosure port
DC power port Earth port
Information technology
AC power port Signal port
equipment
Telecommunication port
IEC 2016/10
Figure 1 – Description of ports
3.6
enclosure port

physical boundary of the EUT through which electromagnetic fields may radiate or impinge. For

plug-in units, the physical boundary will be defined by the host unit
3.7
telephony call

process exercised in the network and the telecommunication terminal equipment (TTE) to allow

interchange of information (speech, video or data) with another TTE through the network

NOTE The call should be operated in the way specified by the manufacturer. For circuit switched services, the

exchange of data should be considered to be possible when a 64 kbit/s channel or equivalent is available for both

parties. For packet service, the exchange of information should be considered to be possible when a virtual path is

established to the called TTE.
3.8
establishment of a telephony call

the operating procedure for a user or an automatic process in conjunction with the network to

reach the capability to exchange information with another TTE
NOTE See Note of 3.7.
3.9
reception of a telephony call

the operating procedure for a user or an automatic process initiated by, and in conjunction with,

the network to reach the capability to exchange information with another TTE
NOTE See Note of 3.7.
3.10
maintenance of a telephony call

the capability of exchanging information without having to clear and re-establish a call

NOTE See Note of 3.7.
---------------------- Page: 11 ----------------------
– 10 – CISPR 24 © IEC:2010
3.11
clearing of a telephony call

the operating procedure for a user or an automatic process in conjunction with the network

(either at the initiative of the local party or the distant party) to stop the capability of exchanging

information by an orderly return to a state where the establishment of a new call is possible

NOTE See Note of 3.7.
3.12
network terminator

associated equipment representing the termination of the telecommunication network

3.13
telephony service

a service providing users with the ability for real-time two-way speech conversation via a

network
[see ITU-T, I.241.1]
3.14
telecommunications terminal equipment
TTE

equipment intended to be connected to a public or private telecommunications network, that is:

a) to be connected directly to the termination of a telecommunications network in order to

send, process or receive information; or

b) to inter-work with a telecommunications network being connected directly or indirectly to

the termination of a telecommunications network in order to send, process or receive

information
3.15
multifunction equipment

information technology equipment in which two or more functions subject to this standard

and/or to other standards are provided in the same unit
NOTE Examples of multifunction equipment include

− a personal computer provided with a telecommunication function and/or broadcast reception function;

− a personal computer provided with a measuring function, etc.
3.16
telecommunication network port

point of connection for voice, data and signaling transfers intended to interconnect widely

dispersed systems via such means as direct connection to multi-user telecommunications

networks (e.g. public switched telecommunications networks (PSTN), integrated services

digital networks (ISDN), x-type digital subscriber lines (xDSL), etc.), local area networks (e.g.

Ethernet, Token Ring, etc.) and similar networks

NOTE A port generally intended for interconnection of components of an ITE system under test (e.g. RS-232,

IEEE Standard 1284 (parallel printer), Universal Serial Bus (USB), IEEE Standard 1394 (“Fire Wire”), etc.) and used

in accordance with its functional specifications (e.g. for the maximum length of cable connected to it), is not

considered to be a telecommunications/network port under this definition.
3.17
analogue interface

an interface that transmits and receives signals whose characteristic quantities follow

continuously the variations of another physical quantity representing information

---------------------- Page: 12 ----------------------
CISPR 24 © IEC:2010 – 11 –
3.18
acoustic interface
port at which audio signals emanate and/or originate
3.19
associated equipment

equipment needed to exercise and/or monitor the operation of the EUT in a representative way

4 Immunity test requirements
4.1 General
The immunity test requirements for equipment are given on a port-by-port basis.
Tests shall be conducted in a well-defined and reproducible manner.

The tests shall be carried out as single tests in sequence. The sequence of testing is optional.

The description of the test, the test generator, the test methods and the test set-up are given in

IEC basic EMC standards which are referred to in the following tables.

The contents of these IEC basic EMC standards are not repeated here; however, modifications

or additional information needed for the practical application of the tests are given in this

publication.
4.2 Particular requirements
4.2.1 Electrostatic discharges (ESD)

The test procedure shall be in accordance with IEC 61000-4-2, with the following modific

...