EN 55012:2007
(Main)Vehicles, boats and internal combustion engines - Radio disturbance characteristics - Limits and methods of measurement for the protection of off-board receivers
Vehicles, boats and internal combustion engines - Radio disturbance characteristics - Limits and methods of measurement for the protection of off-board receivers
The limits in this International Standard are designed to provide protection for broadcast receivers in the frequency range of 30 MHz to 1 000 MHz when used in the residential environment. Compliance with this standard may not provide adequate protection for new types of radio transmissions or receivers used in the residential environment nearer than 10 m to the vehicle, boat or device. This standard applies to the emission of electromagnetic energy which may cause interference to radio reception and which is emitted from a) vehicles propelled by an internal combustion engine, electrical means or both; b) boats propelled by an internal combustion engine, electrical means or both. Boats are to be tested in the same manner as vehicles except where they have unique characteristics as explicitly stated in this standard; c) devices equipped with internal combustion engines. This sixth edition cancels and replaces the fifth edition published in 2001 and its Amendment 1 (2005). This edition constitutes a technical revision. The following changes were made with respect to the previous edition: - deletion of narrowband / broadband determination; - general improvement of wording.
Fahrzeuge, Boote und von Verbrennungsmotoren angetriebene Geräte - Funkstöreigenschaften - Grenzwerte und Messverfahren zum Schutz von außerhalb befindlichen Empfängern
Véhicules, bateaux et moteurs à combustion interne - Caractéristiques de perturbation radioélectrique - Limites et méthodes de mesure pour la protection des récepteurs extérieurs
Vozila, plovila in naprave, ki jih poganjajo motorji z notranjim zgorevanjem - Karakteristike občutljivosti za radijske motnje - Mejne vrednosti in merilne metode za zaščito sprejemnikov, ki niso neposredno vgrajeni (CISPR 12:2007)
Mejne vrednosti v tem mednarodnem standardu so zasnovane za zagotavljanje zaščite sprejemnikov radiodifuzije v frekvenčnem razponu od 30 MHz do 1000 MHz pri uporabi v bivalnih okoljih. Skladnost s tem standardom morda ne bo zagotovila primerne zaščite za nove tipe radijskega oddajanja in sprejemanja, ki se uporabljajo v bivalnih okoljih, ki so bližje vozilu, plovilu ali napravi od 10 m. Ta standard velja za oddajanje elektromagnetne energije, ki lahko povzroči interferenco pri radijskem sprejemu in ki se oddaja iz a) vozil, ki jih poganjajo motorji z notranjim izgorevanjem, električna sredstva ali oboje (glej točko 3.1.); plovila, ki jih poganjajo motorji z notranjim izgorevanjem, električna sredstva ali oboje (glej točko 3.2). Plovila je potrebno preskusiti na isti način kot vozila, razen kadar imajo edinstvene značilnosti, kot je izrecno navedeno v tem standardu; c) naprave, opremljene z motorjem z notranjim izgorevanjem (glej točko 3.3). Glej Dodatek G za shematski prikaz, ki pomaga pri ugotavljanju uporabnosti CISPR 12. Ta standard ne velja za zračna plovila, sisteme vleke (železnica, tramvaj in električni trolejbus) ali za nepopolna vozila. V primeru trolejbusa z dvema načinoma delovanja (npr. ki ga poganja energija bodisi iz izmenične ali enosmerne napeljave ali motor z notranjim izgorevanjem), mora biti vključen sistem notranjega izgorevanja za pogon, vendar je del pogonskega sistema vozila, ki ga predstavljajo izmenične ali enosmerne napeljave, izključen iz tega standarda. OPOMBA 2: Zaščita sprejemnikov, uporabljena v istem vozilu kot vir motenj, je zajeta v CISPR 25. Merjenje elektromagnetnih motenj, medtem ko je vozilo povezano z električnimi napeljavami za napajanje, ni zajeto v tem standardu. Uporabnik naj upošteva primerne IEC in CISPR standarde, ki opredeljujejo tehnike merjenja in omejitve tega pogoja. Dodatek H navaja delo, ki se bo upoštevalo v prihodnjih revizijah.
General Information
Relations
Overview
EN 55012:2007 (identical to CISPR 12:2007) specifies radio disturbance characteristics - limits and methods of measurement - to protect off‑board broadcast receivers from electromagnetic emissions produced by vehicles, boats and devices with internal combustion engines. The standard covers the frequency range 30 MHz to 1 000 MHz and is intended for residential environments with an antenna located about 10 m from the emitting source. It is the sixth edition, replacing earlier 2002/2005 editions, and includes editorial and technical updates (notably deletion of the narrowband/broadband determination).
Key Topics
- Scope and applicability: emissions from vehicles (electric, ICE or hybrid), boats and devices with internal combustion engines; protection of off‑board broadcast receivers.
- Frequency range: 30 MHz – 1 000 MHz.
- Measurement detectors: peak, quasi‑peak and average detector limits are defined for assessing conformity.
- Measurement methods and instrumentation: guidance on spectrum analysers, scanning receivers, antenna types and measurement accuracy (referencing CISPR 16 series).
- Test environments: requirements for Outdoor Test Site (OTS) and Absorber‑Lined Shielded Enclosure (ALSE).
- Antenna positioning and distances: standard measurement at 10 m; Annex B provides procedures for alternative limits at 3 m antenna distance.
- Test object conditions: operation states for vehicles, boats and devices during measurement (engine speeds, loading).
- Compliance procedures: conformance determination, type approval, surveillance testing and statistical evaluation (Annex A).
- Special topics: ignition noise characteristics and suppression (Annexes D–F), measurement set‑ups and maintenance (Annex C).
Applications
EN 55012 is used by:
- Automotive, marine and engine manufacturers for EMC design and production compliance.
- EMC test laboratories performing type approval and pre‑compliance testing against off‑board receiver protection limits.
- Design engineers implementing suppression measures (ignition noise filters, shielding, cable routing) to reduce radio disturbance.
- Regulatory bodies and certification agencies verifying conformity with EMC Directive requirements (see Annex ZZ covering EC Directive 2004/108/EC). Practical uses include type approval testing, production surveillance, troubleshooting radio interference affecting broadcast reception, and establishing EMC test procedures for vehicles and engine‑powered devices.
Related Standards
- CISPR 12 (international equivalent)
- CISPR 16 series / EN 55016 (measurement apparatus and methods)
- CISPR 25 / EN 55025 (protection of on‑board receivers)
- EMC Directive 2004/108/EC (compliance context)
Keywords: EN 55012, CISPR 12, radio disturbance, vehicles boats internal combustion engines, EMC, broadcast receiver protection, measurement methods, emission limits, OTS, ALSE, quasi‑peak, spectrum analyser.
Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2008
1DGRPHãþD
SIST EN 55012:2003
SIST EN 55012:2003/A1:2005
9R]LODSORYLODLQQDSUDYHNLMLKSRJDQMDMRPRWRUML]QRWUDQMLP]JRUHYDQMHP
.DUDNWHULVWLNHREþXWOMLYRVWL]DUDGLMVNHPRWQMH0HMQHYUHGQRVWLLQPHULOQHPHWRGH
]D]DãþLWRVSUHMHPQLNRYNLQLVRQHSRVUHGQRYJUDMHQL &,635
Vehicles, boats and internal combustion engines - Radio disturbance characteristics -
Limits and methods of measurement for the protection of off-board receivers
Fahrzeuge, Boote und von Verbrennungsmotoren angetriebene Geräte -
Funkstöreigenschaften - Grenzwerte und Messverfahren zum Schutz von außerhalb
befindlichen Empfängern
Véhicules, bateaux et moteurs a combustion interne - Caractéristiques de perturbation
radioélectrique - Limites et méthodes de mesure pour la protection des récepteurs
extérieurs
Ta slovenski standard je istoveten z: EN 55012:2007
ICS:
27.020
33.100.10
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 55012
NORME EUROPÉENNE
November 2007
EUROPÄISCHE NORM
ICS 27.020; 33.100.10 Supersedes EN 55012:2002 + A1:2005
English version
Vehicles, boats and internal combustion engines -
Radio disturbance characteristics -
Limits and methods of measurement
for the protection of off-board receivers
(CISPR 12:2007)
Véhicules, bateaux et Fahrzeuge, Boote und
moteurs à combustion interne - von Verbrennungsmotoren
Caractéristiques angetriebene Geräte -
de perturbation radioélectrique - Funkstöreigenschaften -
Limites et méthodes de mesure Grenzwerte und Messverfahren
pour la protection zum Schutz von außerhalb
des récepteurs extérieurs befindlichen Empfängern
(CISPR 12:2007) (CISPR 12:2007)
This European Standard was approved by CENELEC on 2007-09-01. 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
© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 55012:2007 E
Foreword
The text of document CISPR/D/322/CDV, future edition 6 of CISPR 12, 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 55012 on 2007-09-01.
This European Standard supersedes EN 55012:2002 + A1:2005.
The following changes were made with respect to EN 55012:2002 + A1:2005:
– deletion of narrowband / broadband determination;
– general improvement of wording.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2008-06-01
national standard or by endorsement
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2010-09-01
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
EC Directive EMC (2004/108/EC). See Annex ZZ.
Annexes ZA and ZZ have been added by CENELEC.
__________
Endorsement notice
The text of the International Standard CISPR 12:2007 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 55012:2007
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
1)
IEC 60050-161 - International Electrotechnical Vocabulary - -
(IEV) -
Chapter 161: Electromagnetic compatibility
CISPR 16-1-1 2006 Specification for radio disturbance and EN 55016-1-1 2007
immunity measuring apparatus and methods -
Part 1-1: Radio disturbance and immunity
measuring apparatus - Measuring apparatus
CISPR 16-1-3 2004 Specification for radio disturbance and EN 55016-1-3 2006
immunity measuring apparatus and methods -
Part 1-3: Radio disturbance and immunity
measuring apparatus - Ancillary equipment -
Disturbance power
CISPR 16-1-4 2007 Specification for radio disturbance and EN 55016-1-4 2007
immunity measuring apparatus and 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
1) 2)
CISPR 25 - Radio disturbance characteristics for the EN 55025 2003
protection of receivers used on board
vehicles, boats, and on devices -
Limits and methods of measurement
1)
Undated reference.
2)
Valid edition at date of issue.
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 all
relevant essential requirements as given in Annex I, Article 1(a) of the EC Directive 2004/108/EC.
Compliance with this standard provides one means of conformity with the specified essential
requirements of the Directive concerned.
WARNING: Other requirements and other EC Directives may be applicable to the products falling within
the scope of this standard.
INTERNATIONAL
CISPR
ELECTROTECHNICAL
COMMISSION
COMMISSION
Sixth edition
ÉLECTROTECHNIQUE
Sixième édition
2007-05
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 off-board receivers
Véhicules, bateaux et
moteurs à combustion interne –
Caractéristiques de perturbation radioélectrique –
Limites et méthodes de mesure pour la protection
des récepteurs extérieurs
PRICE CODE
XA
Commission Electrotechnique Internationale CODE PRIX
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue
Pour prix, voir catalogue en vigueur
– 2 – CISPR 12 © IEC:2007
CONTENTS
FOREWORD.5
INTRODUCTION.7
1 Scope.8
2 Normative references .9
3 Terms and definitions .9
4 Limits of disturbance .11
4.1 Determination of conformance of vehicle/boat/device with limits.11
4.2 Peak and quasi-peak detector limits .13
4.3 Average detector limit.13
5 Methods of measurement .14
5.1 Measuring instrument .14
5.1.1 Spectrum analyser parameters .15
5.1.2 Scanning receiver parameters .15
5.1.3 Antenna types .16
5.1.4 Accuracy .16
5.2 Measuring location requirements .17
5.2.1 Outdoor test site (OTS) requirements .17
5.2.2 Absorber lined shielded enclosure (ALSE) requirements.19
5.2.3 Antenna requirements .20
5.3 Test object conditions.22
5.3.1 General .22
5.3.2 Vehicles and boats .22
5.3.3 Devices .23
5.4 Data collection .24
6 Methods of checking for compliance with CISPR requirements .24
6.1 General .24
6.2 Application of limit curves.24
6.2.1 Measurements under dry conditions .24
6.2.2 Measurements under wet conditions.24
6.3 Evaluation (general) .25
6.4 Type approval test.25
6.4.1 Single sample.25
6.4.2 Multiple samples (optional) .25
6.5 Surveillance (quality audit) of series production.25
6.5.1 Single sample.25
6.5.2 Multiple samples (optional) .25
6.6 Quick prototype check for development testing (optional, quasi-peak detector
emissions only) .
Annex A (normative) Statistical analysis of the results of measurements .26
Annex B (normative) Procedure to determine an alternative emission limit for
measurements at 3 m antenna distance.28
CISPR 12 © IEC:2007 – 3 –
Annex C (informative) Antenna and transmission line maintenance and
characterization .30
Annex D (informative) Construction features of motor vehicles affecting the emission
of ignition noise .35
Annex E (informative) Measurement of the insertion loss of ignition noise suppressors.36
Annex F (informative) Methods of measurement to determine the attenuation
characteristics of ignition noise suppressors for high voltage ignition systems .42
Annex G (informative) Flow chart for checking the applicability of CISPR 12.52
Annex H (informative) Items under consideration .53
Bibliography.54
Figure 1 – Method of determination of conformance.12
Figure 2 – Limit of disturbance (peak and quasi-peak detector) at 10 m antenna
distance.13
Figure 3 – Limits of disturbance (average detector) at 10 m antenna distance .14
Figure 4 – Measuring site (OTS) for vehicles and devices.18
Figure 5 – Measuring site (OTS) for boats .19
Figure 6 – Antenna position to measure emissions – Vertical polarization.20
Figure 7 – Antenna position to measure emissions – Horizontal polarization.21
Figure B.1 – Determination of the maximum antenna angle.28
Figure B.2 – Calculation of the resulting gain reduction a.29
Figure C.1 – Alternate antenna factor determination (10 m antenna distance).34
Figure E.1 – Test circuit.38
Figure E.2 – General arrangement of the test box.38
Figure E.3 – Details of the test box lid .39
Figure E.4 – Details of the test box .39
Figure E.5 – Straight spark-plug ignition noise suppressor (screened or unscreened) .40
Figure E.6 – Right-angle spark-plug ignition noise suppressor (screened or
unscreened).40
Figure E.7 – Noise suppression spark-plug .40
Figure E.8 – Resistive distributor brush .40
Figure E.9 – Noise suppressor in distributor cap .41
Figure E.10 – Noise suppression distributor rotor.41
Figure E.11 – Noise suppression ignition cable (resistive or reactive) .41
Figure F.1 – Test set-up, side view .44
Figure F.2 – Test set-up, top view.45
Figure F.3 – Pressure chamber with ventilation.46
Figure F.4 – Top view of the set-up of a right-angle ignition noise suppressor for
distributors.47
Figure F.5 – Location of high voltage ignition components .48
Figure F.6 – Top view of the test set-up for distributor rotors .49
– 4 – CISPR 12 © IEC:2007
Figure F.7 – Side view of the test set-up for ready-to-use resistive ignition cables .50
Table 1 – Spectrum analyser parameters.15
Table 2 – Scanning receiver parameters .15
Table 3 – Internal combustion engine operating speeds.23
Table A.1 – Statistical factors .26
Table A.2 – Example of frequency sub-bands .27
Table F.1 – Limits .42
CISPR 12 © IEC:2007 – 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 OFF-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 12 has been prepared by CISPR subcommittee D:
Electromagnetic disturbances related to electric/electronic equipment on vehicles and internal
combustion powered devices.
This sixth edition cancels and replaces the fifth edition published in 2001 and its Amendment
1 (2005). This edition constitutes a technical revision.
The following changes were made with respect to the previous edition:
– deletion of narrowband / broadband determination
– general improvement of wording
– 6 – CISPR 12 © IEC:2007
The text of this standard is based on the following documents:
Enquiry draft Report on voting
CISPR/D/322CDV CISPR/D/341/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.
CISPR 12 © IEC:2007 – 7 –
INTRODUCTION
There is a specific need for standards to define acceptable radio frequency performance of all
electrical/electronic products. CISPR 12 has been developed to serve the road vehicle and
related industries with test methods and limits that provide satisfactory protection for radio
reception.
CISPR 12 has been used for many years as a regulatory requirement in numerous countries,
to provide protection for radio receivers in the residential environment. It has been extremely
effective in protecting the radio environment outside the vehicle.
– 8 – CISPR 12 © IEC:2007
VEHICLES, BOATS AND INTERNAL COMBUSTION ENGINES –
RADIO DISTURBANCE CHARACTERISTICS –
LIMITS AND METHODS OF MEASUREMENT FOR THE PROTECTION
OF OFF-BOARD RECEIVERS
1 Scope
Residential Environment
The limits in this International Standard are
designed to provide protection for broadcast
receivers in the frequency range of 30 MHz
to 1 000 MHz when used in the residential
environment. Compliance with this standard
may not provide adequate protection for new
types of radio transmissions or receivers
used in the residential environment nearer
than 10 m to the vehicle, boat or device.
NOTE 1 Experience has shown that compliance with
this standard may provide satisfactory protection for
receivers of other types of transmissions when used in
the residential environment, including radio
transmissions in frequency ranges other than that
specified.
This standard applies to the emission of electromagnetic energy which may cause
interference to radio reception and which is emitted from
a) vehicles propelled by an internal combustion engine, electrical means or both (see 3.1);
b) boats propelled by an internal combustion engine, electrical means or both (see 3.2).
Boats are to be tested in the same manner as vehicles except where they have unique
characteristics as explicitly stated in this standard;
c) devices equipped with internal combustion engines (see 3.3).
See Annex G for a flow chart to help determine the applicability of CISPR 12.
This standard does not apply to aircraft, traction systems (railway, tramway and electric trolley
bus), or to incomplete vehicles. In the case of a dual-mode trolley bus (e.g. propelled by
power from either a.c./d.c. mains or an internal combustion engine), the internal combustion
propulsion system must be included, but the a.c./d.c. mains portion of the vehicle propulsion
system is excluded from this standard.
NOTE 2 Protection of receivers used on board the same vehicle as the disturbance source(s) are covered by
CISPR 25.
The measurement of electromagnetic disturbances while the vehicle is connected to power
mains for charging is not covered in this standard. The user is referred to appropriate IEC and
CISPR standards which define measurement techniques and limits for this condition.
Annex H lists work being considered for future revisions.
CISPR 12 © IEC:2007 – 9 –
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, International Electrotechnical Vocabulary (IEV) – Chapter 161: Electro-
magnetic compatibility
CISPR 16-1-1:2006, Specification for radio disturbance and immunity measuring apparatus
and methods – Part 1-1: Radio disturbance and immunity measuring apparatus – Measuring
apparatus
CISPR 16-1-3:2004, Specification for radio disturbance and immunity measuring apparatus
and methods – Part 1-3: Radio disturbance and immunity measuring apparatus – Ancillary
equipment – Disturbance power
CISPR 16-1-4:2007, Specification for radio disturbance and immunity measuring apparatus
and methods – Part 1-4: Radio disturbance and immunity measuring apparatus – Ancillary
equipment – Radiated disturbances
CISPR 16-2-3:2006, Specification for radio disturbance and immunity measuring apparatus
and methods – Part 2-3: Methods of measurement of disturbances and immunity – Radiated
disturbance measurements
CISPR 25, Radio disturbance characteristics for the protection of receivers used on board
vehicles, boats, and on devices – Limits and methods of measurement
3 Terms and definitions
For the purpose of this document, the terms and definitions contained in IEC 60050-161 as
well as the following apply.
3.1
vehicle
machine operating on land which is intended to carry persons or goods
NOTE Vehicles include, but are not limited to, cars, trucks, buses, mopeds, agricultural machinery, earth-moving
machinery, material-handling equipment, mining equipment and snowmobiles.
3.2
boat
vessel intended to be used on the surface of water, its length being no greater than 15 m
3.3
device
machine driven by an internal combustion engine which is not primarily intended to carry
persons or goods
NOTE Devices include, but are not limited to, chainsaws, irrigation pumps, snow blowers, air compressors, and
landscaping equipment
3.4
impulsive ignition noise
unwanted emission of electromagnetic energy, predominantly impulsive in content, arising
from the ignition system within a vehicle, boat or device
– 10 – CISPR 12 © IEC:2007
3.5
ignition noise suppressor
that portion of a high-voltage ignition circuit intended to limit the emission of impulsive ignition
noise
3.6
outdoor test site (OTS)
measurement site similar to an open area test site as specified in CISPR 16, however a
ground plane is not required and there are dimensional changes
NOTE Specific requirements are defined in this document.
3.7
resistive distributor brush
resistive pick-up brush in an ignition distributor cap
3.8
frequency sub-band
segment of the frequency spectrum (30 MHz to 1 000 MHz) defined to enable statistical
evaluation of the test data acquired by swept frequency testing
3.9
representative frequency
assigned frequency of a frequency sub-band to be used for comparison of the data to the limit
3.10
characteristic level
controlling (or dominant) emission level experienced in each frequency sub-band. The
characteristic level is the maximum measurement obtained for both antenna polarizations and
for all the specified measurement positions of the vehicle, boat or device. Known ambient
signals are not considered part of the characteristic level.
3.11
tracking generator
test signal oscillator (continuous wave, cw) that is frequency locked to the receive frequency
of a measuring instrument
3.12
RF disturbance power
RF power measured with a current transformer of an absorbing clamp and an RF measuring
instrument. It may be measured – as the RF disturbance voltage – in a peak or quasi-peak
mode
3.13
spark discharge
in this document, the discharge of energy stored in the ignition coil, in an arc across the
electrodes of a measuring spark-plug
3.14
resistive high-voltage (HV) ignition cable
ignition cable whose conductor has a high resistance (attenuation)
3.15
residential environment
environment having a 10 m protection distance between the source and the point of radio
reception and where the source uses the public low voltage power system or battery power
NOTE Examples of a residential environment include rooming houses, private dwellings, entertainment halls,
theatres, schools, public streets, etc.
CISPR 12 © IEC:2007 – 11 –
4 Limits of disturbance
4.1 Determination of conformance of vehicle/boat/device with limits
In the 30 MHz – 1 GHz frequency range, the vehicle/boat/device shall comply with both:
• average limits when the vehicle/boat/device is in “Key-On, Engine-Off” mode (see 5.3.2.1),
and
• peak or quasi-peak limits when the vehicle/boat/device is in “Engine-Running” mode (see
5.3.2.2)
The limits given in this standard take into account uncertainties.
Figure 1 defines the method for determination of conformance.
– 12 – CISPR 12 © IEC:2007
Start
"Engine- Running mode"
"Key- On, Engine- Off" operating
operating conditions
conditions
Measurement with Measur ement with
peak detector peak detector
Are the peak Are the peak
data below the data below the
(a)
(a)
average limit ? quasi- peak limit ?
Yes Yes
No
No
Are the peak
data below the
peak limit ?
Yes
No
Measurement with
(b)
quasi- peak det ector
Measurement with
(b)
average detector
Are the quasi- peak
data below the
Yes
quasi- peak limit ?
Are the average
data below the
average limit ? Yes
No
No
Pass for "Key-On, Pass for "Engine -
Engine-Off" Running mode"
"Key-On, Engine-Off"
pass AND "Engine-
Running” mode pass ?
No
Yes
Fail Fail
Pass
IEC 706/07
a Because measurement with peak detector is always higher than or equal to measurement with quasi-
peak detector (and average detector respectively) and applicable peak limit is always higher than or
equal to applicable quasi-peak limit (and average limit respectively), this single detector measurement
can lead to a simplified and quicker conformance process.
b This flow-chart is applicable for each individual frequency, e.g only frequencies that are above the
applicable limit need to be remeasured with quasi-peak detector (and average detector respectively).
Figure 1 – Method of determination of conformance
CISPR 12 © IEC:2007 – 13 –
4.2 Peak and quasi-peak detector limits
The limit for emissions measured with peak or quasi-peak detector at 10 m antenna distance
is given in the table of Figure 2 and is shown graphically in Figure 2. Only one of the
bandwidths listed needs to be chosen for testing. For more accurate determination, the
equations given in Figure 2 shall be used. For measurements at 3 m antenna distance, 10 dB
shall be added to the limit.
Limit L in dB (μV/m) as a function of bandwidth, detector and frequency f in MHz
bw
30-75 75-400 400-1000
L
bw Measurement type
MHz MHz MHz
L
120 kHz 34 34 + 15,13 lg (f/75) 45 Quasi-peak
L
120 kHz 65 Peak
54 + 15,13 lg (f/75)
72 + 15,13 lg (f/75)
L 83 Peak
1 MHz 72
Linear when plotted
Quasi-peak Peak
dB versus log frequency
L L L
120 kHz 120 kHz 1 MHz
45 180 65 83
40 100 60 78
Linear plot Linear plot
Linear plot Logarithmic
dB (μV/m) dB (μV/m)
dB (μV/m) plot μV/m
34 50 54 72
30 75 400 1 000
Frequency in MHz - logarithmic plot IEC 707/07
NOTE 1 For vehicles equipped with electric propulsion motors, see 5.3.2.
NOTE 2 For peak measurements, see 5.5.
NOTE 3 The correlation factor between quasi-peak and peak measurements is +20 dB at 120 kHz bandwidth,
based on experimental data accumulated in many countries.
Figure 2 – Limit of disturbance (peak and quasi-peak detector)
at 10 m antenna distance
4.3 Average detector limit
The limit for emissions measured with the average detector at 10 m antenna distance is
shown in Figure 3. Vehicles/boats/devices not including electronic oscillators with an
operating frequency greater than 9 kHz shall be deemed to be in compliance with the average
requirements of this clause without performing tests for emissions with average detector.
Vehicles/boats/devices which meet the average emissions requirements of CISPR 25,
Clause 5 shall also be deemed to be in compliance with the average requirements of this
subclause and no further testing is necessary.
– 14 – CISPR 12 © IEC:2007
For measurements at 3 m antenna distance, 10 dB shall be added to the limit.
Annex D of CISPR 16-2-3 explains the differences between the CISPR AV detector and an AV
detector (complying with CISPR 16-1:1999). For the purpose of this standard either detector
may be used, since the pulse repetition rate for internal combustion engines is above 10 Hz.
NOTE For type-approval testing per 6.4, use of an alternative test method based upon other regulatory standards
is permitted as detailed herein. This alternate type-approval test applies to those vehicles/boats/devices for which
on-board receivers can be installed. If, when measured in accordance with the vehicle test methodology of
CISPR 25 for emissions using an average detector, the signal strength at the vehicle/boat/device broadcast radio
antenna is less than 20 dB (μV) (10 μV) over the frequency range 76 MHz to 108 MHz, then the vehicle/boat/device
can be deemed to comply with the limits for average emissions and no further testing must be required.
230 1 000
30 100
Frequency in MHz
IEC 708/07
Figure 3 – Limits of disturbance (average detector) at 10 m antenna distance
5 Methods of measurement
5.1 Measuring instrument
The measuring instrument shall comply with the requirements of CISPR 16-1-1. Either manual
or automatic frequency scanning may be used.
NOTE Spectrum analysers and scanning receivers are particularly useful for disturbance measurements. The
peak detection mode of spectrum analysers and scanning receivers provides a display indication which is never
less than the quasi-peak indication for the same bandwidth. It may be convenient to measure emissions using peak
detection because of the faster scan possible than with quasi-peak detection.
When quasi-peak limits are being used, and a peak detector is used for time efficiency, any
peak measurements with results at or above the test limit shall be re-measured using the
quasi-peak detector.
Field strength in µV/m
Field Strength in dB (µV/m)
CISPR 12 © IEC:2007 – 15 –
5.1.1 Spectrum analyser parameters
The scan rate of the spectrum analyser shall be adjusted for the CISPR frequency band and
detection mode used. The maximum scan rate shall comply with the requirements of
CISPR 16-2-3.
The bandwidth of the spectrum analyser shall be chosen such that the noise floor is at least
6 dB lower than the limit curve.
NOTE A preamplifier may be used between the antenna and the spectrum analyser in order to achieve the 6 dB
noise floor requirement.
The recommended scan time and bandwidth are listed in Table 1:
Table 1 – Spectrum analyser parameters
Frequency Peak detector Quasi-peak detector Average detector
range
a) b) a)
MHz Scan time BW Scan time RBW Scan time
RBW
30 to 1 000 100 kHz / 120 kHz 100 ms / MHz 120 kHz 20 s / MHz 100 kHz / 120 kHz 100 ms /MHz
a)
RBW is defined at –3 dB.
b)
BW is defined at –6 dB.
If a spectrum analyser is used for peak measurements, the video bandwidth shall be at least
three times the resolution bandwidth (RBW).
5.1.2 Scanning receiver parameters
The dwell time of the scanning receiver shall be adjusted for the CISPR frequency band and
detection mode used. The minimum dwell time shall comply with the requirements of
CISPR 16-2-3.
The bandwidth of the scanning receiver shall be chosen such that the noise floor is at least
6 dB lower than the limit curve.
NOTE A preamplifier may be used between the antenna and the scanning receiver in order to achieve the 6 dB
noise floor requirement.
The recommended dwell time, maximum step size and bandwidth are listed in Table 2:
Table 2 – Scanning receiver parameters
Peak detector Quasi-peak detector Average detector
Frequency
range
Band- Step Dwell Band- Step Dwell Band- Step Dwell
MHz
a a a
time width size time width size time
width size
30 to 1 000 120 kHz 50 kHz 5 ms 120 kHz 50 kHz 1 s 120 kHz 50 kHz 5 ms
a
For purely broadband disturbances, the maximum frequency step size may be increased up to a value not
greater than the bandwidth value.
– 16 – CISPR 12 © IEC:2007
5.1.3 Antenna types
5.1.3.1 Reference antenna
The antenna shall be a balanced dipole (see CISPR 16-1-4). Free-space antenna factors are
to be used. For frequencies of 80 MHz or above, the antenna shall be resonant in length, and
for frequencies below 80 MHz it shall be the length equal to the 80 MHz resonant length. It
shall be matched to the feeder by a suitable symmetric-asymmetric transformer device.
5.1.3.2 Broadband antennas
Any linearly polarized receiving antenna is permitted, provided that it can be normalized to the
reference antenna.
A broadband antenna shall be used when making measurements with an automated receiving
system using a scanning measuring instrument. Such a broadband antenna is usable for
measuring emission levels (over the frequency spectrum covered by this standard), provided
that its output can be normalized to the output of the reference antenna in the actual test
environment at the actual test site.
When broadband antennas are used, they shall meet the requirements for complex antennas
given in CISPR 16-1-4. Examples of factors to be considered include:
a) the effective aperture area of the antenna, including its polar response (horizontal and
vertical planes).
b) the effect of a phase centre which moves with frequency.
c) the effect of ground reflection characteristics (including multiple ray reflections which may
arise at specific frequencies at about 500 MHz vertical polarization and 900 MHz
horizontal polarization).
See Annex C for alternate antenna characterization.
5.1.4 Accuracy
The measurement system consisting of the antenna, transmission line and the measuring
instrument, but excluding the source and the measuring site, shall measure electric field
strength over the frequency range of 30 MHz to 1 000 MHz with an accuracy of ±3 dB. See
Clause 4 of CISPR 16-1-4. The frequency accuracy shall be better than ±1 %.
NOTE 1 To ensure that the measurements defined in this standard are within the stated tolerances, consideration
should be given to all pertinent characteristics of measuring equipment (for example, frequency and amplitude
stability, image rejection, cross-modulation, overload levels, selectivity, time constants, and signal/noise ratio), as
well as those affecting the antenna and transmission line.
NOTE 2 It is reasonable to expect additional variations in measurements made of an electric field (see C.13)
within the range of 30 MHz to 1 000 MHz. These are caused by variations in ground conductivity and other factors
influencing repeatability.
CISPR 12 © IEC:2007 – 17 –
5.2 Measuring location requirements
5.2.1 Outdoor test site (OTS) requirements
5.2.1.1 OTS for vehicles and devices
The test site shall be a clear area, free from electromagnetic reflecting surfaces within a circle
of minimum radius 30 m measured from a point midway between the vehicle or device and the
antenna. As an exception, the measuring equipment, and test hut or vehicle in which the
measuring equipment is located (when used) may be within the test site, but only in the
permitted region indicated by the crosshatched area of Figure 4.
NOTE The site requirements defined in 5.2.1.1 and Figure 4 are the application of CISPR 16-1-4 to large
automotive objects.
Vehicles and devices smaller than 2 m in length and width may be tested on an OTS with
dimensions corresponding to CISPR 16-1-4, Figures 2 or 3.
5.2.1.2 OTS for boats
The test site shall be a clear area free from electromagnetic reflecting surfaces within a circle
of minimum radius 30 m measured from a point midway between the engine under test and
the antenna. Exceptions for the measuring equipment are specified in 5.2.1.2.1 and also in
5.2.1.2.2. As an exception, the measuring equipment may be within the test site, but only in
the permitted region indicated by the crosshatched area of Figure 5. The test hut or vehicle or
non-metallic boat of test fixture in/on which the measuring equipment is located may be within
the test site.
Boats or engines/motors for boats tested separately shall be tested in salt or fresh water at a
measuring site as shown in Figure 5.
5.2.1.2.1 Land-based measuring equipment
When the measuring equipment is on land, the test hut or vehicle in which the measuring
equipment is located may be within the test site, but only in the permitted region indicated by
the cross-hatched area of Figure 5.
5.2.1.2.2 Water-based measuring equipment
The measuring equipment shall be installed in a non-metallic boat or non-metallic test fixture
which may be within the test site, but only within the permitted region indicated by the cross-
hatched area of Figure 5.
– 18 – CISPR 12 © IEC:2007
Engine midpoint
positioned on normal
from antenna midpoint
Centre of 30 m radius clear area
at midpoint between reference
antenna and EUT
(10,0 ± 0,2) m
Reference antenna
15 m min rad
...
Frequently Asked Questions
EN 55012:2007 is a standard published by CLC. Its full title is "Vehicles, boats and internal combustion engines - Radio disturbance characteristics - Limits and methods of measurement for the protection of off-board receivers". This standard covers: The limits in this International Standard are designed to provide protection for broadcast receivers in the frequency range of 30 MHz to 1 000 MHz when used in the residential environment. Compliance with this standard may not provide adequate protection for new types of radio transmissions or receivers used in the residential environment nearer than 10 m to the vehicle, boat or device. This standard applies to the emission of electromagnetic energy which may cause interference to radio reception and which is emitted from a) vehicles propelled by an internal combustion engine, electrical means or both; b) boats propelled by an internal combustion engine, electrical means or both. Boats are to be tested in the same manner as vehicles except where they have unique characteristics as explicitly stated in this standard; c) devices equipped with internal combustion engines. This sixth edition cancels and replaces the fifth edition published in 2001 and its Amendment 1 (2005). This edition constitutes a technical revision. The following changes were made with respect to the previous edition: - deletion of narrowband / broadband determination; - general improvement of wording.
The limits in this International Standard are designed to provide protection for broadcast receivers in the frequency range of 30 MHz to 1 000 MHz when used in the residential environment. Compliance with this standard may not provide adequate protection for new types of radio transmissions or receivers used in the residential environment nearer than 10 m to the vehicle, boat or device. This standard applies to the emission of electromagnetic energy which may cause interference to radio reception and which is emitted from a) vehicles propelled by an internal combustion engine, electrical means or both; b) boats propelled by an internal combustion engine, electrical means or both. Boats are to be tested in the same manner as vehicles except where they have unique characteristics as explicitly stated in this standard; c) devices equipped with internal combustion engines. This sixth edition cancels and replaces the fifth edition published in 2001 and its Amendment 1 (2005). This edition constitutes a technical revision. The following changes were made with respect to the previous edition: - deletion of narrowband / broadband determination; - general improvement of wording.
EN 55012:2007 is classified under the following ICS (International Classification for Standards) categories: 27.020 - Internal combustion engines; 33.020 - Telecommunications in general; 33.100.10 - Emission. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 55012:2007 has the following relationships with other standards: It is inter standard links to EN 55012:2002, EN 55012:2002/A1:2005, EN IEC 55012:2025, EN 55012:2007/A1:2009. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 55012:2007 is associated with the following European legislation: EU Directives/Regulations: 2004/108/EC, 2004/108/EU, 2014/30/EU, 89/336/EEC; Standardization Mandates: M/404. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
You can purchase EN 55012:2007 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CLC standards.
Die Norm EN 55012:2007 befasst sich mit den radioelektronischen Störungen, die von Fahrzeugen, Booten und Verbrennungsmotoren ausgehen. Der Anwendungsbereich dieser internationalen Norm ist darauf ausgelegt, Rundfunkempfänger im Frequenzbereich von 30 MHz bis 1.000 MHz im Wohnumfeld zu schützen. Dies stellt sicher, dass die elektromagnetische Energie, die von Fahrzeugen, Booten und entsprechenden Geräten mit Verbrennungsmotoren oder elektrischen Antrieben emittiert wird, innerhalb zulässiger Grenzen bleibt, um Interferenzen mit dem Radioempfang zu minimieren. Ein wesentliches Stärke der Norm ist, dass sie spezifische Messmethoden und Grenzwerte festlegt, die für verschiedene Flotten von Fahrzeugen und Booten anwendbar sind. Dies umfasst sowohl die Testmethodik für Fahrzeuge als auch für Boote, wobei letztere unter Berücksichtigung ihrer einzigartigen Eigenschaften bewertet werden. Die Klarheit und Präzision der Formulierungen in dieser sechsten Ausgabe bieten Verbesserungspotenzial im Vergleich zur vorherigen Auflage, besonders durch die Streichung der Unterscheidung zwischen schmalbandigen und breitbandigen Bestimmungen. Darüber hinaus bringt diese Norm eine technische Überarbeitung mit sich, die den fortlaufenden Fortschritt in der Technik und den sich wandelnden Anforderungen an den Schutz von Rundfunkempfängern widerspiegelt. Die Relevanz der EN 55012:2007 liegt nicht nur in ihrer Bedeutung für den Schutz bestehender Rundfunkempfänger, sondern auch in der Notwendigkeit, regelmäßig überprüfte Standards zu haben, um zukünftige Entwicklungen im Bereich der Funkübertragungen zu berücksichtigen. Insgesamt ist diese Norm ein wichtiger Bestandteil der Sicherheits- und Umweltvorschriften, die sicherstellen, dass Mobilität und Freizeitgestaltung nicht auf Kosten der Funkkommunikation erfolgen.
La norme EN 55012:2007, intitulée "Véhicules, bateaux et moteurs à combustion interne - Caractéristiques de perturbation radio - Limites et méthodes de mesure pour la protection des récepteurs externes", offre une portée essentielle en matière de protection des récepteurs de radiodiffusion dans une plage de fréquences de 30 MHz à 1 000 MHz, particulièrement dans les environnements résidentiels. Ce standard est particulièrement pertinent dans un contexte où les interférences électromagnétiques peuvent affecter la réception radio, un enjeu croissant à mesure que les technologies évoluent. Parmi les forces notables de cette norme, on trouve son approche globale concernant l’émission d'énergie électromagnétique. Elle s'applique non seulement aux véhicules à moteur à combustion interne, mais également aux bateaux et aux dispositifs équipés de tels moteurs. La norme stipule que les bateaux doivent être testés suivant les mêmes modalités que les véhicules, en prenant en considération leurs caractéristiques uniques, ce qui démontre une flexibilité et une adaptation aux différents types de moyens de transport. De plus, la révision technique apportée dans cette sixième édition, qui remplace la cinquième édition de 2001 ainsi que son amendement 1 de 2005, met en avant un effort d'amélioration continue. Le retrait de la détermination bande étroite / bande large et une amélioration générale du libellé renforcent la clarté et l'application de la norme dans des contextes variés, rendant son utilisation plus intuitive pour les professionnels du secteur. Il est également crucial de noter que la norme EN 55012:2007 prend en compte les nouveaux défis liés à l'émergence de types de transmissions ou de récepteurs radio qui pourraient ne pas être suffisamment protégés à proximité de 10 m des véhicules, bateaux ou dispositifs concernés. Cela souligne l'importance de la mise à jour régulière des normes pour tenir compte des évolutions technologiques et garantir leur pertinence. En somme, la norme EN 55012:2007 se positionne comme un instrument essentiel pour assurer la protection des récepteurs de radiodiffusion contre les perturbations radio dans un contexte toujours plus complexe de communications électromagnétiques. Sa portée, ses points forts et sa pertinence en font un document incontournable pour les professionnels du secteur.
標準EN 55012:2007は、車両、ボート、および内燃機関におけるラジオ干渉特性の測定と限界に関する国際標準であり、オフボード受信機の保護のために設計されています。この標準は、住宅環境内で使用される放送受信機を守るための限界を提供することを目的としています。特に、30 MHzから1,000 MHzの周波数範囲において、内燃機関または電動手段で動かされる車両やボート、内燃機関を搭載したデバイスから発生する電磁エネルギーによる干渉を防ぐための指針が示されています。 この基準の強みは、住宅環境でのラジオ受信の安全性を確保するために必要な測定方法と限界を明確に定義している点です。また、ボートは車両と同様の方法でテストされる旨が述べられており、両者の一貫性が保たれています。しかし、10メートル以内に新しいタイプのラジオ送信または受信機が近接する場合には、十分な保護が提供されない可能性があるため、注意が必要です。 新しい版のこの標準では、過去の版から広帯域/狭帯域の判断の削除や表現の一般的な改善が行われており、技術的な改訂が図られています。このような変更は、将来の技術進化に対して柔軟に対応できる基盤を提供し、業界における実用性と関連性を向上させるものです。 総じて、EN 55012:2007は、内燃機関を使用する様々な移動手段からの電磁干渉に関する明確なガイドラインを提示し、放送受信品質の向上に寄与する重要な標準です。技術的な進化に基づく見直しを通じて、現代のニーズに合致しつつ適切な保護を提供することが期待されます。
The EN 55012:2007 standard provides a comprehensive framework aimed at regulating the radio disturbance characteristics of vehicles, boats, and internal combustion engines. Its primary focus is the establishment of limits and measurement methods to ensure the protection of off-board receivers, specifically broadcast receivers operating within the frequency range of 30 MHz to 1,000 MHz in residential settings. One of the standard's notable strengths is its clear delineation of applicability, which encompasses not only vehicles powered by internal combustion engines but also those driven by electrical means, as well as boats and devices featuring internal combustion engines. This broad scope reflects the increasing intertwining of various transport modes and technology, making the standard especially relevant in an era where hybrid and electric propulsion systems are gaining traction. The standard outlines a thorough approach to measuring electromagnetic emissions that could interfere with radio reception, thereby establishing a baseline of compliance that manufacturers must adhere to. By focusing on limiting emissions, the EN 55012:2007 plays a pivotal role in safeguarding essential communication channels, thus enhancing the overall user experience in residential environments. Importantly, the 2007 edition represents a significant technical revision from its previous iteration published in 2001. The revisions made-such as the deletion of narrowband/broadband determination and general improvements in wording-emphasize the standard's commitment to clarity and precision. These updates not only simplify the understanding of compliance requirements but also align the standard with current technological advancements and emerging radio frequencies. In conclusion, EN 55012:2007 stands out for its robust framework that ensures the protection of off-board receivers from electromagnetic interference emanating from various vehicles and devices. Its emphasis on comprehensive testing and clear guidelines makes it a critical resource for manufacturers aiming to adhere to best practices in electromagnetic compatibility within residential areas.
표준 EN 55012:2007은 내부 연소 엔진을 사용하는 차량 및 보트, 그 외의 장치에서 발생하는 전자기 방출에 대한 규제 및 측정을 위한 지침을 제공합니다. 이 표준은 30 MHz에서 1,000 MHz 주파수 범위 내에서 주거 환경에서 방송 수신기를 보호하기 위한 한계를 설정하고 있습니다. 이 표준의 강점 중 하나는 차량과 보트에서의 전자기 방출을 체계적으로 규명함으로써, 새로운 유형의 라디오 전송 또는 수신기에 대한 잠재적 간섭 문제를 해결하려는 근본적인 의지를 보여준다는 점입니다. 추가적으로, 보트는 차량과 동일한 방식으로 시험되지만, 표준에 명시된 고유한 특성에 따라 달리 평가되는 점도 고려되어 있습니다. 또한, 기존의 2001년에 발행된 다섯 번째 판과 그 개정판(2005)을 취소하고 대체하는 이번 제6판에서는 언어의 전반적인 개선이 이루어졌습니다. 특히, 협대역 및 광대역 판별의 삭제는 표준의 이해를 더욱 간결하고 명확하게 만들어 줍니다. 이러한 조정은 사용자들에게 더욱 효과적으로 적용될 수 있는 환경을 제공하며, 수신기와의 적합성을 높이는 데 기여하고 있습니다. EN 55012:2007의 적용 범위와 변화는 주거 환경에서 발생하는 전자기 간섭을 줄이는 데 있어 매우 중요하며, 이는 전반적인 사용자 경험을 향상시키는 데 기여합니다. 표준의 재정비를 통해 현대적인 전자기기 및 통신 환경에서의 요구 사항을 효과적으로 반영하고 있다는 점에서도 높은 평가를 받을 만합니다.
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