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

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.

Einrichtungen der Informationstechnik - Störfestigkeitseigenschaften - Grenzwerte und Messverfahren

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

Définit les prescriptions concernant l'évaluation de l'immunité pour les appareils de traitement de l'information (ATI, tels que définis dans le CISPR 22) en matière de perturbations continues et permanentes, 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. Cette publication définit des prescriptions qui apportent un niveau approprié d'immunité intrinsèque de façon que l'appareil puisse fonctionner normalement dans son environnement. Les prescriptions sont spécifiées pour chaque accès considéré.

Oprema za informacijsko tehnologijo - Karakteristike odpornosti proti motnjam - Mejne vrednosti in merilne metode

Ta objava CISPR velja za opremo za informacijsko tehnologijo (ITE), kot je opredeljeno v CISPR 22. Cilj te objave je vzpostaviti zahteve, ki bodo zagotovile zadostno raven notranje odpornosti, da bo oprema delovala v svojem okolju, kot je predvideno. Objava opredeljuje zahteve za preskušanje odpornosti za opremo v njenem območju uporabe ob upoštevanju neprekinjenih in občasnih, vodenih in sevanih elektromagnetnih motenj, vključno z elektrostatičnimi razelektritvami (ESD). Opredeljeni so postopki za merjenje ITE in določene so mejne vrednosti, razvite za ITE, v frekvenčnem razponu od 0 Hz do 400 GHz. V izjemnih okoljskih pogojih se lahko zahtevajo posebni ukrepi za ublažitev. Zahvaljujoč zahtevam glede preskušanja in zmogljivosti, so nekateri preskusi določeni v opredeljenih frekvenčnih razponih ali pri izbranih frekvencah. Za opremo, ki izpolnjuje zahteve pri teh frekvencah, se šteje, da izpolnjuje zahteve v celotnem frekvenčnem razponu od 0 Hz do 400 GHz za elektromagnetne pojave. Preskusne zahteve so določene za vsak obravnavan vhod. OPOMBA 1 Varnostni vidiki niso zajeti v tej objavi. OPOMBA 2 V posebnih primerih bodo nastale situacije, kjer raven motnje lahko presega ravni, določene v tej objavi, na primer, kjer se uporablja ročni oddajnik v bližini opreme. V takih primerih bo morda treba uporabiti ukrepe za ublažitev.

General Information

Status
Published
Publication Date
20-Jan-2011
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
17-Dec-2010
Due Date
21-Feb-2011
Completion Date
21-Jan-2011

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SLOVENSKI STANDARD
SIST EN 55024:2011
01-februar-2011
1DGRPHãþD
SIST EN 55024:2000
SIST EN 55024:2000/A1:2003
SIST EN 55024:2000/A2:2003
SIST EN 55024:2000/IS1:2008
Oprema za informacijsko tehnologijo - Karakteristike odpornosti proti motnjam -
Mejne vrednosti in merilne metode

Information technology equipment - Immunity characteristics - Limits and methods of

measurement

Einrichtungen der Informationstechnik - Störfestigkeitseigenschaften - Grenzwerte und

Messverfahren

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

méthodes de mesure
Ta slovenski standard je istoveten z: EN 55024:2010
ICS:
33.100.20 Imunost Immunity
35.020 Informacijska tehnika in Information technology (IT) in
tehnologija na splošno general
SIST EN 55024:2011 en

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

---------------------- Page: 1 ----------------------
SIST EN 55024:2011
---------------------- Page: 2 ----------------------
SIST EN 55024:2011
EUROPEAN STANDARD
EN 55024
NORME EUROPÉENNE
November 2010
EUROPÄISCHE NORM

ICS 33.100.20 Supersedes EN 55024:1998, EN 55024:1998/IS1:2007 + A1:2001 + A2:2003

English version
Information technology equipment -
Immunity characteristics -
Limits and methods of measurement
(CISPR 24:2010)

Appareils de traitement de l'information - Einrichtungen der Informationstechnik -

Caractéristiques d'immunité - Störfestigkeitseigenschaften -
Limites et méthodes de mesure Grenzwerte und Prüfverfahren
(CISPR 24:2010) (CISPR 24:2010)

This European Standard was approved by CENELEC on 2010-11-16. 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 Central Secretariat 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 Central Secretariat 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, Romania, Slovakia, Slovenia,

Spain, Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 55024:2010 E
---------------------- Page: 3 ----------------------
SIST EN 55024:2011
EN 55024:2010 - 2 -
Foreword

The text of document CIS/I/331/FDIS, future edition 2 of CISPR 24, prepared by CISPR SC I,

Electromagnetic compatibility of information technology equipment, multimedia equipment and receivers,

was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 55024 on

2010-11-16.

This European Standard supersedes EN 55024:1998, EN 55024:1998/IS1:2007 + A1:2001 + A2:2003.

This EN 55024:2010 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.

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

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

rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2011-09-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2013-12-01

This European Standard has been prepared under a mandate given to CENELEC by the European

Commission and the European Free Trade Association and covers essential requirements of

EU Directives 1999/5/EC and 2004/108/EC. See Annex ZZ.
Annexes ZA and ZZ have been added by CENELEC.
__________
Endorsement notice

The text of the International Standard CISPR 24:2010 was approved by CENELEC as a European

Standard without any modification.
__________
---------------------- Page: 4 ----------------------
SIST EN 55024:2011
- 3 - EN 55024:2010
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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.

NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD

applies.
Publication Year Title EN/HD Year
IEC 60050-161 1990 International Electrotechnical Vocabulary - -
(IEV) -
Chapter 161: Electromagnetic compatibility
IEC 60318-1 2009 Electroacoustics - Simulators of human head EN 60318-1 2009
and ear -
Part 1: Ear simulator for the measurement of
supra-aural and circumaural earphones
IEC 61000-4-2 2008 Electromagnetic compatibility (EMC) - EN 61000-4-2 2009
Part 4-2: Testing and measurement
techniques - Electrostatic discharge immunity
test
IEC 61000-4-3 2006 Electromagnetic compatibility (EMC) - EN 61000-4-3 2006
+ A1 2007 Part 4-3: Testing and measurement + A1 2008
+ A2 2010 techniques - Radiated, radio-frequency, + A2 2010
electromagnetic field immunity test
IEC 61000-4-4 2004 Electromagnetic compatibility (EMC) - EN 61000-4-4 2004
Part 4-4: Testing and measurement
techniques - Electrical fast transient/burst
immunity test
IEC 61000-4-5 2005 Electromagnetic compatibility (EMC) - EN 61000-4-5 2006
Part 4-5: Testing and measurement
techniques - Surge immunity test
IEC 61000-4-6 2008 Electromagnetic compatibility (EMC) - EN 61000-4-6 2009
Part 4-6: Testing and measurement
techniques - Immunity to conducted
disturbances, induced by radio-frequency
fields
IEC 61000-4-8 2009 Electromagnetic compatibility (EMC) - EN 61000-4-8 2010
Part 4-8: Testing and measurement
techniques - Power frequency magnetic field
immunity test
IEC 61000-4-11 2004 Electromagnetic compatibility (EMC) - EN 61000-4-11 2004
Part 4-11: Testing and measurement
techniques - Voltage dips, short interruptions
and voltage variations immunity tests
---------------------- Page: 5 ----------------------
SIST EN 55024:2011
EN 55024:2010 - 4 -
Publication Year Title EN/HD Year
CISPR 16-1-2 2003 Specification for radio disturbance and EN 55016-1-2 2004
+ A1 2004 immunity measuring apparatus and methods - + A1 2005
+ A2 2006 Part 1-2: Radio disturbance and immunity + A2 2006
measuring apparatus - Ancillary equipment -
Conducted disturbances
CISPR 20 2006 Sound and television broadcast receivers EN 55020 2007
and associated equipment - Immunity
characteristics - Limits and methods of
measurement
CISPR 22 (mod) 2008 Information technology equipment - Radio EN 55022 201X
disturbance characteristics - Limits and
methods of measurement
To be published.
---------------------- Page: 6 ----------------------
SIST EN 55024:2011
- 5 - EN 55024:2010
Annex ZZ
(informative)
Coverage of Essential Requirements of EC Directives
This European Standard has been prepared under a mandate given to CENELEC by the

European Commission and the European Free Trade Association and within its scope the

standard covers protection requirements Annex I, Article 1(b) of the EC Directive 2004/108/EC,

and essential requirements of Article 3.1(b) (immunity only) of the EC Directive 1999/5/EC.

Compliance with this standard provides presumption of conformity with the specified essential

requirements of the Directives concerned.

NOTE Other requirements and other EC Directives may be applicable to the products falling within the scope of this

standard.
---------------------- Page: 7 ----------------------
SIST EN 55024:2011
---------------------- Page: 8 ----------------------
SIST EN 55024:2011
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: 9 ----------------------
SIST EN 55024:2011
– 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: 10 ----------------------
SIST EN 55024:2011
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: 11 ----------------------
SIST EN 55024:2011
– 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: 12 ----------------------
SIST EN 55024:2011
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.
---------------------- Page: 13 ----------------------
SIST EN 55024:2011
– 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: 14 ----------------------
SIST EN 55024:2011
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: 15 ----------------------
SIST EN 55024:2011
– 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: 16 ----------------------
SIST EN 55024:2011
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
NOT
...

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