Vehicles, boats and internal combustion engines - Radio disturbance characteristics - Limits and methods of measurement for the protection of on-board receivers

Contains limits and procedures for the measurement of radio disturbance in the frequency range of 150 kHz to 1000 MHz. The standard applies to any electronic/electrical component intended for use in vehicles and devices.

Fahrzeuge, Boote und von Verbrennungsmotoren angetriebene Geräte - Funkstöreigenschaften - Grenzwerte und Messverfahren für den Schutz von an Bord befindlichen Empfängern

Véhicules, bateaux et moteurs à combustion interne - Caractéristiques des perturbations radioélectriques - Limites et méthodes de mesure pour la protection des récepteurs embarqués

La CISPR 25:2008 donne les limites et les procédures pour la mesure des perturbations radioélectriques dans la gamme de fréquences comprises entre 150 kHz et 2 500 MHz. Cette norme s'applique à tous les équipements électroniques/électriques destinés à une utilisation sur véhicules, remorques et engins. Le détail des allocations de fréquences peut-être obtenu en se référant aux publications de l'Union Internationale des Télécommunications (UIT). Les limites d'essai ont pour but de permettre la protection des récepteurs installés dans le véhicule contre les perturbations créées par les équipements/modules installés dans le même véhicule. Les méthodes et limites pour un véhicule complet sont présentées à l'Article 5 et les méthodes et limites pour les équipements/modules sont présentées à l'Article 6. La compatibilité d'un équipement par rapport à une limite pour un véhicule ne peut être validée que lors d'un essai sur véhicule complet. Les types de récepteurs à protéger sont les récepteurs de radio télédiffusion (son et télévision), les radios mobiles, les radiotéléphones, les radioamateurs, les CB, les dispositifs de navigation par satellite (GPS, etc.) et Bluetooth. Pour les besoins de la présente norme, un véhicule est une machine autopropulsée. Les véhicules incluent (sans s'y limiter) les voitures particulières, camions, machines agricoles et engins destinés à évoluer sur la neige. L'Annexe A donne des indications pour déterminer si la présente norme est applicable à un matériel particulier. Les limites de la présente norme sont recommandées et sujettes à modification par accord entre le fabricant de véhicules et le fournisseur d'équipements. Cette norme est également conçue pour être appliquée par les constructeurs et fournisseurs d'équipements et modules qui peuvent être ajoutés et raccordés au faisceau électrique du véhicule ou à un connecteur d'alimentation du véhicule, installés en seconde monte. Cette troisième édition annule et remplace la seconde édition publiée en 2002. Les modifications majeures suivantes ont été apportées par rapport à l'édition précédente: - ajout des mesures requises par l'utilisation du détecteur de valeur moyenne et du détecteur de crête et quasi-crête; - ajout de méthodes et limites de protection de nouveaux services radio analogiques et digitaux dans le domaine de fréquences jusqu'à 2 500 MHz; - ajout d'une nouvelle méthode de mesure pour composants (ligne TEM à plaques) dans l'Annexe informative G; - ajout du contenu de la CISPR 21 dans l'Annexe H. La CISPR 21 dans son intégralité devient maintenant obsolète; - suppression de la détermination bande étroite / large bande; - suppression de l'Annexe sur la caractérisation de l'antenne fouet (maintenant traitée dans la CISPR 16-1-4); - suppression de l'Annexe sur la caractérisation de la cage de Faraday (la CISPR 25 sera modifiée lorsque le groupe de travail conjoint des sous-comités CISPR/D et CISPR/A terminera son projet sur la validation de la chambre). Le contenu du corrigendum de janvier 2009 a été pris en considération dans cet exemplaire.

Vozila, plovila in naprave z motorji z notranjim zgorevanjem - Karakteristike občutljivosti za radijske motnje - Mejne vrednosti in metode merjenja za zaščito sprejemnikov na krovu (CISPR 25:2008)

General Information

Status
Withdrawn
Publication Date
11-Dec-2008
Withdrawal Date
14-Nov-2019
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
14-Nov-2019
Due Date
07-Dec-2019
Completion Date
15-Nov-2019

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SLOVENSKI STANDARD
SIST EN 55025:2009
01-januar-2009
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SIST EN 55025:2003
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VSUHMHPQLNRYQDNURYX &,635

Vehicles, boats and internal combustion engines - Radio disturbance characteristics -

Limits and methods of measurement for the protection of on-board receivers
Fahrzeuge, Boote und von Verbrennungsmotoren angetriebene Geräte -
Funkstöreigenschaften - Grenzwerte und Messverfahren für den Schutz von an Bord
befindlichen Empfängern

Véhicules, bateaux et moteurs à combustion interne - Caractéristiques des perturbations

radioélectriques - Limites et méthodes de mesure pour la protection des récepteurs

embarqués
Ta slovenski standard je istoveten z: EN 55025:2008
ICS:
33.060.20 Sprejemna in oddajna Receiving and transmitting
oprema equipment
33.100.99 Drugi vidiki v zvezi z EMC Other aspects related to
EMC
SIST EN 55025:2009 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN 55025:2009SIST EN 55025:2009
---------------------- Page: 2 ----------------------
SIST EN 55025:2009SIST EN 55025:2009
EUROPEAN STANDARD
EN 55025
NORME EUROPÉENNE
August 2008
EUROPÄISCHE NORM
ICS 33.100.10; 33.100.20 Supersedes EN 55025:2003
English version
Vehicles, boats and internal combustion engines -
Radio disturbance characteristics -
Limits and methods of measurement
for the protection of on-board receivers
(CISPR 25:2008)
Véhicules, bateaux et moteurs Fahrzeuge, Boote
à combustion interne - und von Verbrennungsmotoren
Caractéristiques angetriebene Geräte -
des perturbations radioélectriques - Funkstöreigenschaften -
Limites et méthodes de mesure Grenzwerte und Messverfahren
pour la protection für den Schutz von an Bord
des récepteurs embarqués befindlichen Empfängern
(CISPR 25:2008) (CISPR 25:2008)

This European Standard was approved by CENELEC on 2008-06-01. 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, 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
Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 55025:2008 E
---------------------- Page: 3 ----------------------
SIST EN 55025:2009SIST EN 55025:2009
EN 55025:2008 - 2 -
Foreword

The text of document CISPR/D/344/CDV, future edition 3 of CISPR 25, prepared by CISPR SC D,

Electromagnetic disturbances related to electric/electronic equipment on vehicles and internal combustion

engine powered devices, was submitted to the IEC-CENELEC parallel Unique Acceptance Procedure

and was approved by CENELEC as EN 55025 on 2008-06-01.
This European Standard supersedes EN 55025:2003.
The following significant changes were made with respect to EN 55025:2003:

– addition of required measurements with both an average detector and a peak or quasi-peak detector;

– addition of methods and limits for the protection of new analogue and digital radio services, which

cover the frequency range up to 2 500 MHz;

– addition of a new measurement method for components (stripline) as an informative Annex G;

– addition of Annex H;
– deletion of narrowband / broadband determination;

– deletion of the annex on rod antenna characterisation (this is now covered by EN 55016-1-4);

– deletion of the annex on characterisation of shielded enclosure (EN 55025 will be amended when the

CISPR/D / CISPR/A Joint Task Force on chamber validation finishes its work).
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) 2009-03-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-06-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice

The text of the International Standard CISPR 25:2008 was approved by CENELEC as a European

Standard without any modification.
__________
---------------------- Page: 4 ----------------------
SIST EN 55025:2009SIST EN 55025:2009
- 3 - EN 55025:2008
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 - -
A1 1997 (IEV) -
A2 1998 Chapter 161: Electromagnetic compatibility
CISPR 12 2007 Vehicles, boats and internal combustion EN 55012 2007
engines - Radio disturbance characteristics -
Limits and methods of measurement for the
protection of off-board receivers
CISPR 16-1-1 2006 Specification for radio disturbance and EN 55016-1-1 2007
A1 2006 immunity measuring apparatus and A1 2007
A2 2007 methods - A2 2008
Part 1-1: Radio disturbance and immunity
measuring apparatus - Measuring apparatus
CISPR 16-1-2 2003 Specification for radio disturbance and EN 55016-1-2 2004
A1 2004 immunity measuring apparatus and A1 2005
A2 2006 methods - A2 2006
Part 1-2: Radio disturbance and immunity
measuring apparatus - Ancillary equipment -
Conducted disturbances
CISPR 16-1-4 2007 Specification for radio disturbance and EN 55016-1-4 2007
A1 2007 immunity measuring apparatus and A1 2008
methods -
Part 1-4: Radio disturbance and immunity
measuring apparatus - Ancillary equipment -
Radiated disturbances
CISPR 16-2-3 2006 Specification for radio disturbance and EN 55016-2-3 2006
immunity measuring apparatus and
methods -
Part 2-3: Methods of measurement of
disturbances and immunity - Radiated
disturbance measurements
ISO 11452-4 2005 Road vehicles - Component test methods - -
for electrical disturbances from narrowband
radiated electromagnetic energy -
Part 4: Bulk current injection (BCI)
SAE ARP 958.1 2003 Electromagnetic Interference Measurement - -
Antennas; Standard Calibration Method
---------------------- Page: 5 ----------------------
SIST EN 55025:2009SIST EN 55025:2009
---------------------- Page: 6 ----------------------
SIST EN 55025:2009SIST EN 55025:2009
CISPR 25
Edition 3.0 2008-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
COMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES
Vehicles, boats and internal combustion engines – Radio disturbance
characteristics – Limits and methods of measurement for the protection of
on-board receivers
Véhicules, bateaux et moteurs à combustion interne – Caractéristiques des
perturbations radioélectriques – Limites et méthodes de mesure pour la
protection des récepteurs embarqués
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX
ICS 33.100.10; 33.100.20 ISBN 2-8318-9664-9
---------------------- Page: 7 ----------------------
SIST EN 55025:2009SIST EN 55025:2009
– 2 – CISPR 25 © IEC:2008
CONTENTS

FOREWORD...........................................................................................................................5

INTRODUCTION.....................................................................................................................7

1 Scope...............................................................................................................................8

2 Normative references .......................................................................................................9

3 Terms and definitions........................................................................................................10

4 Requirements common to vehicle and component/module emissions measurement........12

4.1 General test requirements and test plan ................................................................12

4.1.1 Categories of disturbance sources (as applied in the test plan) .................12

4.1.2 Test plan ...................................................................................................13

4.1.3 Determination of conformance of EUT with limits .......................................13

4.1.4 Operating conditions..................................................................................15

4.1.5 Test report.................................................................................................15

4.2 Shielded enclosure................................................................................................15

4.3 Absorber-lined shielded enclosure (ALSE).............................................................15

4.3.1 Reflection characteristics...........................................................................15

4.3.2 Size...........................................................................................................16

4.3.3 Objects in ALSE ........................................................................................16

4.4 Measuring instrument ............................................................................................16

4.4.1 Spectrum analyser parameters ..................................................................16

4.4.2 Scanning receiver parameters ...................................................................17

4.5 Power supply.........................................................................................................18

5 Measurement of emissions received by an antenna on the same vehicle ........................19

5.1 Antenna measuring system ...................................................................................19

5.1.1 Type of antenna ........................................................................................19

5.1.2 Measuring system requirements ................................................................19

5.2 Method of measurement ........................................................................................20

5.3 Examples of limits for vehicle radiated disturbances..............................................23

6 Measurement of components and modules .....................................................................25

6.1 Test equipment .....................................................................................................25

6.1.1 Ground plane.............................................................................................25

6.1.2 Power supply and AN ................................................................................25

6.1.3 Load Simulator ..........................................................................................25

6.1.4 Signal/control line filters ............................................................................26

6.2 Conducted emissions from components/modules – Voltage method ......................26

6.2.1 General .....................................................................................................26

6.2.2 Ground plane arrangement ........................................................................26

6.2.3 Limits for conducted disturbances from components/modules –

Voltage method .........................................................................................33

6.3 Conducted emissions from components/modules – current probe method .............34

6.3.1 Test set-up ................................................................................................34

6.3.2 Test procedure ..........................................................................................35

6.3.3 Limits for conducted disturbances from components/modules –

Current probe method................................................................................37

6.4 Radiated emissions from components/modules - ALSE method .............................38

6.4.1 General .....................................................................................................38

6.4.2 Test set-up ................................................................................................39

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SIST EN 55025:2009SIST EN 55025:2009
CISPR 25 © IEC:2008 – 3 –

6.4.3 Test procedure ..........................................................................................41

6.4.4 Limits for radiated disturbances from components/modules – ALSE

method ......................................................................................................47

6.5 Radiated emissions from components/modules – TEM cell method .......................49

6.5.1 General .....................................................................................................49

6.5.2 Test set-up ................................................................................................51

6.5.3 Test procedure ..........................................................................................52

6.5.4 Limits for radiated disturbances from components/modules – TEM

cell method................................................................................................54

6.6 Radiated emissions from components/modules – Stripline method ........................56

Annex A (informative) Flow chart for checking the applicability of CISPR 25 ........................57

Annex B (normative) Antenna matching unit – Vehicle test ..................................................58

Annex C (informative) Sheath-current suppressor ................................................................60

Annex D (informative) Guidance for the determination of the noise floor of active

vehicle antennas in the AM and FM Range ...........................................................................61

Annex E (normative) Artificial network .................................................................................64

Annex F (informative) TEM cell dimensions .........................................................................66

Annex G (informative) Radiated emissions from components/modules – Stripline

method .................................................................................................................................68

Annex H (informative) Interference to mobile radio communication in the presence of

impulsive noise – Methods of judging degradation ................................................................76

Annex I (informative) Items Under Consideration .................................................................80

Bibliography..........................................................................................................................81

Figure 1 – Method of determination of conformance for all frequency bands .........................14

Figure 2 – Example of gain curve..........................................................................................20

Figure 3 – Vehicle-radiated emissions – Example for test layout (end view with

monopole antenna) ...............................................................................................................22

Figure 4 – Average limit for radiated disturbances from vehicles GPS band 1 567,42 to

1 583,42 MHz .......................................................................................................................24

Figure 5 – Example for the required minimum attenuation of the signal / control line

filters ....................................................................................................................................26

Figure 6 – Conducted emissions – EUT with power return line remotely grounded. ...............29

Figure 7 – Conducted emissions – EUT with power return line locally grounded....................30

Figure 8 – Conducted emissions – Test layout for alternators and generators.......................31

Figure 9 – Conducted emissions – Test layout for ignition system components .....................32

Figure 10 – Conducted emissions – Example of test layout for current probe

measurements ......................................................................................................................36

Figure 11 – Test harness bending requirements....................................................................40

Figure 12 – Example of test set-up – rod antenna .................................................................43

Figure 13 – Example of test set-up – biconical antenna ........................................................44

Figure 14 – Example of test set-up – log-periodic antenna....................................................45

Figure 15 – Example of test set-up – above 1 GHz ...............................................................46

Figure 16 – Example of average limit for radiated disturbances from components GPS

band 1 567,42 to 1 583,42 MHz – Class 5..................................................................................49

Figure 17 – TEM cell (example) ............................................................................................50

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SIST EN 55025:2009SIST EN 55025:2009
– 4 – CISPR 25 © IEC:2008

Figure 18 – Example of arrangement of leads in the TEM cell and to the connector

panel ....................................................................................................................................51

Figure 19 – Example of the arrangement of the connectors, the lead frame and the

dielectric support ..................................................................................................................52

Figure 20 – Example of the TEM cell method test layout .......................................................53

Figure B.1 –Verification set-up..............................................................................................59

Figure C.1 – Attenuation vs. frequency .................................................................................60

Figure D.1 – Vehicle test set up for equipment noise measurement in the AM/FM range .......62

Figure D.2 – Vehicle test set up for antenna noise measurement in the AM/FM range...........63

Figure E.1 – Characteristics of the AN impedance ................................................................64

Figure E.2 – Example of 5 μH AN schematic.........................................................................65

Figure F.1 – TEM cell ...........................................................................................................66

Figure G.1 – Example of a basic stripline test setup in a shielded enclosure.........................70

Figure G.2 – Example for a 50 Ω stripline .............................................................................74

Figure G.3 – Example for a 90 Ω stripline .............................................................................75

Table 1 – Spectrum analyser parameters..............................................................................17

Table 2 – Scanning receiver parameters ...............................................................................18

Table 3 – Antenna types .......................................................................................................19

Table 4 – Example for limits of disturbance – Complete vehicle ............................................23

Table 5 – Examples of quasi-peak or peak limits for conducted disturbances – Voltage

Method .................................................................................................................................33

Table 6 – Examples of average limits for conducted disturbances – Voltage Method.............34

Table 7 – Examples of quasi-peak and peak limits for conducted disturbances -

control/signal lines – Current probe method ..........................................................................37

Table 8 – Examples of average limits for conducted disturbances - control/signal lines

– Current probe method ........................................................................................................38

Table 9 – Examples of quasi-peak or peak limits for radiated disturbances – ALSE ..............47

Table 10 – Examples of average limits for radiated disturbances – ALSE..............................48

Table 11 – Examples of quasi-peak or peak limits for radiated disturbances – TEM cell........55

Table 12 – Examples of average limits for radiated disturbances – TEM Cell ........................56

Table F.1 – Dimensions for TEM cells...................................................................................67

Table G.1 – Examples of quasi-peak or peak limits for radiated disturbances –

Stripline ................................................................................................................................71

Table G.2 – Examples of average limits for radiated disturbances – Stripline........................72

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SIST EN 55025:2009SIST EN 55025:2009
CISPR 25 © IEC:2008 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
____________
VEHICLES, BOATS AND INTERNAL COMBUSTION ENGINES –
RADIO DISTURBANCE CHARACTERISTICS –
LIMITS AND METHODS OF MEASUREMENT FOR
THE PROTECTION OF ON-BOARD RECEIVERS
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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any

equipment declared to be in conformity with an IEC Publication.

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 25 has been prepared by CISPR subcommittee D:

Electromagnetic disturbances related to electric/electronic equipment on vehicles and internal

combustion engine powered devices.

This third edition cancels and replaces the second edition published in 2002. This edition

constitutes a technical revision.

The following significant changes were made with respect to the previous edition:

– addition of required measurements with both an average detector and a peak or quasi-

peak detector;

– addition of methods and limits for the protection of new analogue and digital radio

services, which cover the frequency range up to 2 500 MHz;

– addition of a new measurement method for components (stripline) as an informative

Annex G;
---------------------- Page: 11 ----------------------
SIST EN 55025:2009SIST EN 55025:2009
– 6 – CISPR 25 © IEC:2008

– addition of the contents of CISPR 21 as Annex H; CISPR 21 in its entirety now becomes

obsolete.
– deletion of narrowband / broadband determination;
– deletion of the Annex on rod antenna characterisation (this is now covered by
CISPR 16-1-4);

– deletion of the Annex on characterisation of shielded enclosure (CISPR 25 will be

amended when the CISPR/D / CISPR/A Joint Task Force on chamber validation finishes

its work).
The text of this standard is based on the following documents:
Enquiry draft Report on voting
CISPR/D/344/CDV CISPR/D/352/RVC

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 maintenance result 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: 12 ----------------------
SIST EN 55025:2009SIST EN 55025:2009
CISPR 25 © IEC:2008 – 7 –
INTRODUCTION

This International Standard is designed to protect on-board receivers from disturbances

produced by conducted and radiated emissions arising in a vehicle.

Test procedures and limits given are intended to provide provisional control of vehicle

radiated emissions, as well as component/module conducted/radiated emissions of long and

short duration.
To accomplish this end, this standard:
– establishes a test method for measuring the electromagnetic emissions from the
electrical system of a vehicle;

– sets limits for the electromagnetic emissions from the electrical system of a vehicle;

– establishes test methods for testing on-board components and modules independent

from the vehicle;

– sets limits for electromagnetic emissions from components to prevent objectionable

disturbance to on-board receivers;

– classifies automotive components by disturbance duration to establish a range of

limits.

NOTE Component tests are not intended to replace vehicle tests. Exact correlation between component and vehicle test

performance is dependent on component mounting location, harness length, routing and grounding, as well as antenna location.

Component testing, however, permits components to be evaluated prior to actual vehicle availability.

---------------------- Page: 13 ----------------------
SIST EN 55025:2009SIST EN 55025:2009
– 8 – CISPR 25 © IEC:2008
VEHICLES, BOATS AND INTERNAL COMBUSTION ENGINES –
RADIO DISTURBANCE CHARACTERISTICS –
LIMITS AND METHODS OF MEASUREMENT FOR
THE PROTEC
...

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