EN IEC 55025:2022
(Main)Vehicles, boats and internal combustion engines - Radio disturbance characteristics - Limits and methods of measurement for the protection of on-board receivers
Vehicles, boats and internal combustion engines - Radio disturbance characteristics - Limits and methods of measurement for the protection of on-board receivers
This document contains limits and procedures for the measurement of radio disturbances in the
frequency range of 150 kHz to 5 925 MHz. This document applies to vehicles, boats, internal
combustion engines, trailers, devices and any electronic/electrical component intended for use
in vehicles, boats, trailers and devices. Refer to International Telecommunications Union (ITU)
publications for details of frequency allocations. The limits are intended to provide protection
for on-board receivers installed (per the manufacturer’s guidelines) in a vehicle from
disturbances produced by components/modules in the same vehicle.
The receiver types to be protected are, for example, broadcast receivers (sound and television),
land mobile radio, radio telephone, amateur, citizens' radio, Satellite Navigation (GPS etc.), WiFi, V2X, and Bluetooth.
This document does not include protection of electronic control systems from radio frequency
(RF) emissions or from transient or pulse-type voltage fluctuations. These subjects are included
in ISO publications.
The limits in this document are recommended and subject to modification as agreed between
the customer (e.g. vehicle manufacturer) and the supplier (e.g. component manufacturer). This
document is also intended to be applied by vehicle manufacturers and suppliers which are to
be added and connected to the vehicle harness or to an on-board power connector after delivery
of the vehicle.
This document defines test methods for use by vehicle manufacturers and suppliers, to assist
in the design of vehicles and components and ensure controlled levels of on-board radio
frequency emissions.
The emission requirements in this document are not intended to be applicable to the intentional
transmissions from a radio transmitter as defined by the ITU including their spurious emissions.
NOTE 1 This exclusion is limited to those intended transmitter emissions, which leave the EUT as radiated
emissions and are coupled onto the wire line in the measurement setup. For conducted transmissions on frequencies
intentionally produced by the radio part of an EUT, this exclusion does not apply.
NOTE 2 It is usual for customers and suppliers to use radio regulation standards to manage the effect of spurious
emissions from a radio transmitter unless limits of spurious emission are agreed in the test plan.
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
Vozila, plovila in naprave z motorji z notranjim zgorevanjem - Karakteristike občutljivosti za radijske motnje - Mejne vrednosti in metode merjenja za zaščito sprejemnikov na krovu
Ta dokument vsebuje mejne vrednosti in postopke merjenja občutljivosti za radijske motnje v frekvenčnem območju od 150 kHz to 5925 MHz. Ta dokument se uporablja za vozila, plovila, naprave z motorji z notranjim zgorevanjem, priklopnike, naprave in električne/elektronske sestavne dele, ki so namenjeni za uporabo v vozilih, plovilih, priklopnikih in napravah. Za podrobnosti o dodelitvah frekvenc glej publikacije Mednarodne zveze za telekomunikacije (ITU). Mejne vrednosti so namenjene zaščiti sprejemnikov, vgrajenih (v skladu z navodili proizvajalca) v vozilu, pred motnjami, ki jih povzročajo sestavni deli/moduli v zadevnem vozilu. Vrste sprejemnikov, ki jih je treba zaščititi, so npr. oddajni sprejemniki (zvok in televizija), kopenski mobilni radio, radiotelefon, amaterski radio, radijska oprema CB, satelitska navigacija (GPS itd.), WiFi, V2X in Bluetooth. Ta dokument ne vključuje zaščite elektronskih krmilnih sistemov pred radiofrekvenčnimi (RF) emisijami ali prehodnim oz. impulznim nihanjem napetosti. Te teme so zajete v publikacijah ISO. Mejne vrednosti v tem dokumentu so priporočljive in se lahko spremenijo, kot se dogovorita stranka (npr. proizvajalec vozila) in dobavitelj (npr. proizvajalec sestavnih delov). Ta dokument je namenjen tudi proizvajalcem in dobaviteljem sestavnih delov in opreme, ki jih je treba po dobavi vozila dodati in priključiti na kabelski snop vozila oziroma napajalni priključek v vozilu. Ta dokument določa preskusne metode, namenjene za proizvajalce in dobavitelje vozil, za pomoč pri oblikovanju vozil in sestavnih delov ter zagotavljanje nadziranih ravni frekvenčnih emisij v vozilih. Zahteve glede emisij iz tega dokumenta niso namenjene za uporabo za namerne prenose iz radijskega oddajnika, kot ga opredeljuje ITU, vključno z neželenimi emisijami. OPOMBA 1: Ta izključitev je omejena na predvidene emisije oddajnika, ki zapustijo preskušano opremo kot sevane emisije in se v postavitvi za merjenje spojijo s kabelsko napeljavo. Za izvedene prenose na frekvencah, ki jih namenoma proizvede radijski del preskušane naprave, se ta izključitev ne uporablja. OPOMBA 2: Običajno je, da stranke in dobavitelji za obvladovanje vplivov neželenih emisij iz radijskega oddajnika uporabljajo standarde o radiokomunikacijah, razen če so v načrtu preskušanja dogovorjene mejne vrednosti neželenih emisij.
General Information
Relations
Overview
EN IEC 55025:2022 (identical to CISPR 25:2021) specifies radio disturbance characteristics, limits and measurement methods for the protection of on‑board receivers in vehicles, boats and internal combustion engine‑powered devices. Published by CENELEC/CENELEC members in 2022, this standard supersedes EN 55025:2017 and harmonizes vehicle and component/module electromagnetic compatibility (EMC) testing practices across the automotive and marine sectors.
Key Topics and Requirements
- Scope and conformity: Defines test plans, operating conditions, determination of conformance and required test reports for Equipment Under Test (EUT).
- Measurement types: Covers both radiated emissions (antenna‑based, ALSE and stripline methods) and conducted emissions (voltage method, current probe method) from vehicles and components/modules.
- Test environments and apparatus:
- Shielded enclosures and Absorber‑Lined Shielded Enclosures (ALSE) with performance validation.
- Antenna measuring systems, Antenna Matching Unit (annex B) and guidance on active vehicle antenna noise floor.
- Reference ground plane, load simulator, power supply configurations for different vehicle states (ignition on/engine off, engine running, EV charging modes).
- Instrumentation and parameters: Spectrum analyser and scanning receiver settings, calibration and measurement uncertainty considerations.
- Artificial networks: Normative definitions and usage of AN, HV‑AN, DC‑charging‑AN, AMN, AAN for conducted measurements (annex E).
- Special test cases: Procedures for plug‑in hybrid/electric vehicles in charging modes (mode 1–4), and component/module radiated testing (ALSE and stripline).
- Documentation: Requirements for test plans, flowcharts (informative), and detailed test reports.
Practical Applications and Users
This standard is used to:
- Validate and certify EMC performance of vehicles, marine craft and internal combustion engine devices to protect on‑board radio receivers.
- Guide EMC design and troubleshooting for automotive and marine electronics (ECUs, telematics, infotainment, antennas, charging systems).
- Support pre‑compliance and certification testing in accredited EMC test laboratories.
- Inform OEMs, Tier‑1/2 suppliers, EV charging equipment manufacturers, and regulatory bodies on harmonized test methods and limits.
Typical users: automotive OEM engineers, EMC test engineers, component manufacturers, compliance officers and laboratory managers.
Related Standards
EN IEC 55025 references and aligns with other EMC and vehicle standards such as CISPR 16‑series, CISPR 12, EN 55016, IEC 61851‑1 and vehicle test standards like ISO 7637‑3. Use these cross‑references when planning comprehensive EMC test programs.
Keywords: EN IEC 55025:2022, CISPR 25, vehicle EMC, on‑board receivers, radiated emissions, conducted emissions, ALSE, artificial network, antenna measuring system, EV charging EMC.
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2022
Nadomešča:
SIST EN 55025:2017
SIST EN 55025:2017/AC:2018
Vozila, plovila in naprave z motorji z notranjim zgorevanjem - Karakteristike
občutljivosti za radijske motnje - Mejne vrednosti in metode merjenja za zaščito
sprejemnikov na krovu
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 pertubations
radioélectriques - Limites et méthodes de mesure pour la protection des récepteurs
embarqués
Ta slovenski standard je istoveten z: EN IEC 55025:2022
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 55025
NORME EUROPÉENNE
EUROPÄISCHE NORM February 2022
ICS 33.100.10; 33.100.20 Supersedes EN 55025:2017 and all of its amendments
and corrigenda (if any)
English Version
Vehicles, boats and internal combustion engines - Radio
disturbance characteristics - Limits and methods of
measurement for the protection of on-board receivers
(CISPR 25:2021)
Véhicules, bateaux et moteurs à combustion interne - Fahrzeuge, Boote und von Verbrennungsmotoren
Caractéristiques des pertubations radioélectriques - Limites angetriebene Geräte - Funkstöreigenschaften - Grenzwerte
et méthodes de mesure pour la protection des récepteurs und Messverfahren für den Schutz von an Bord befindlichen
embarqués Empfängern
(CISPR 25:2021) (CISPR 25:2021)
This European Standard was approved by CENELEC on 2022-01-20. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 55025:2022 E
European foreword
The text of document CIS/D/477/FDIS, future edition 5 of CISPR 25, prepared by CISPR SC D
“Electromagnetic disturbances related to electric/electronic equipment on vehicles and internal
combustion engine powered devices” of CISPR “International special committee on radio interference”
was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2022–10–20
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2025–01–20
document have to be withdrawn
This document supersedes EN 55025:2017 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard CISPR 25:2021 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
CISPR 12:2007 NOTE Harmonized as EN 55012:2007 (not modified)
CISPR 16-2-3:2016 NOTE Harmonized as EN 55016-2-3:2017 (not modified)
IEC 62196-1:2014 NOTE Harmonized as EN 62196-1:2014 (modified)
CISPR 16-2-1:2014 NOTE Harmonized as EN 55016-2-1:2014 (not modified)
CISPR 32:2015 NOTE Harmonized as EN 55032:2015 (not modified) +A11:2020
CISPR 16-4-2:2011 NOTE Harmonized as EN 55016-4-2:2011 (not modified)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 61851-1 2017 Electric vehicle conductive charging EN IEC 61851-1 2019
system - Part 1: General requirements
CISPR 16-1-1 2019 Specification for radio disturbance and EN IEC 55016-1-1 2019
immunity measuring apparatus and
methods - Part 1–1: Radio
disturbance and immunity measuring
apparatus - Measuring apparatus
CISPR 16-1-2 2014 Specification for radio disturbance and EN 55016-1-2 2014
immunity measuring apparatus and
methods - Part 1–2: Radio
disturbance and immunity measuring
apparatus - Coupling devices for
conducted disturbance measurements
AMD1 2017 A1 2018
CISPR 16-1-6 2014 Specification for radio disturbance and EN 55016-1-6 2015
immunity measuring apparatus and
methods - Part 1–6: Radio
disturbance and immunity measuring
apparatus - EMC antenna calibration
AMD1 2017 A1 2017
ISO 7637-3 2016 Road vehicles - Electrical - -
disturbances from conduction and
coupling - Part 3: Electrical transient
transmission by capacitive and
inductive coupling via lines other than
supply lines
ISO 11452-4 2020 Road vehicles - Component test - -
methods for electrical disturbances
from narrowband radiated
electromagnetic energy - Part 4:
Harness excitation methods
SAE ARP 958.1 Rev 2003– Electromagnetic Interference - -
D 02 Measurement Antennas; Standard
Calibration Method
CISPR 25 ®
Edition 5.0 2021-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
INT ERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
C OMITÉ 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
INTERNATIONALE
ICS 33.100.10; 33.100.20 ISBN 978-2-8322-1061-6
– 2 – CISPR 25:2021 © IEC 2021
CONTENTS
FOREWORD . 9
INTRODUCTION . 11
1 Scope . 12
2 Normative references . 12
3 Terms and definitions . 13
4 Requirements common to vehicle and component/module emissions measurement . 19
4.1 General test requirements . 19
4.1.1 Categories of disturbance sources (as defined in the test plan) . 19
4.1.2 Test plan . 19
4.1.3 Determination of conformance of equipment under test (EUT) with limits . 19
4.1.4 Operating conditions . 20
4.1.5 Test report . 21
4.2 Shielded enclosure . 21
4.3 Absorber-lined shielded enclosure (ALSE) . 21
4.3.1 General . 21
4.3.2 Size . 21
4.3.3 Objects in ALSE . 21
4.3.4 ALSE performance validation . 22
4.4 Measuring instrument . 22
4.4.1 General . 22
4.4.2 Spectrum analyser parameters . 22
4.4.3 Scanning receiver parameters . 25
4.5 Power supply . 27
4.5.1 General . 27
4.5.2 Internal combustion engine vehicle – ignition on, engine off. 27
4.5.3 Internal combustion engine vehicle – engine running . 27
4.5.4 Plug-in hybrid electric or electric vehicle in charging mode . 28
4.5.5 Hybrid electric or electric vehicle in running mode . 28
4.5.6 Component/module tests . 28
5 Measurement of emissions received by an antenna on the same vehicle . 29
5.1 General . 29
5.2 Antenna measuring system . 29
5.2.1 Type of antenna. 29
5.2.2 Measuring system requirements . 29
5.3 Method of measurement . 31
5.4 Test setup for vehicle in charging mode . 32
5.4.1 General . 32
5.4.2 Vehicle in charging mode 1 or mode 2 (AC power charging without
communication) . 33
5.4.3 Vehicle in charging mode 3 (AC power charging with communication) or
mode 4 (DC power charging with communication) . 35
5.5 Examples of limits for vehicle radiated disturbances . 40
6 Measurement of components and modules . 46
6.1 General . 46
6.2 Test equipment . 46
6.2.1 Reference ground plane . 46
6.2.2 Power supply and AN . 47
CISPR 25:2021 © IEC 2021 – 3 –
6.2.3 Load simulator . 47
6.3 Conducted emissions from components/modules – Voltage method . 47
6.3.1 General . 47
6.3.2 Test setup . 47
6.3.3 Test procedure . 48
6.3.4 Limits for conducted disturbances from components/modules – Voltage
method . 54
6.4 Conducted emissions from components/modules – current probe method . 54
6.4.1 General . 54
6.4.2 Test setup . 54
6.4.3 Test procedure . 55
6.4.4 Limits for conducted disturbances from components/modules – Current
probe method . 57
6.5 Radiated emissions from components/modules – ALSE method . 57
6.5.1 General . 57
6.5.2 Test setup . 58
6.5.3 Test procedure . 60
6.5.4 Limits for radiated disturbances from components/modules – ALSE
method . 65
6.6 Radiated emissions from components/modules – Stripline method . 72
Annex A (informative) Flow chart for checking the applicability of CISPR 25 to vehicles
and boats . 73
Annex B (normative) Antenna matching unit – Vehicle test . 74
B.1 Antenna matching unit parameters (150 kHz to 6,2 MHz) . 74
B.2 Antenna matching unit – verification . 74
B.2.1 General . 74
B.2.2 Gain measurement . 74
B.2.3 Test procedure . 74
B.3 Impedance measurement . 74
Annex C (informative) Sheath-current suppressor . 76
C.1 General information . 76
C.2 Suppressor construction . 76
Annex D (informative) Guidance for the determination of the noise floor of active
vehicle antennas . 77
Annex E (normative) Artificial Network (AN), High Voltage Artificial Network (HV-AN),
Direct Current charging Artificial Network (DC-charging-AN), Artificial Mains Network
(AMN) and Asymmetric Artificial Network (AAN). 80
E.1 General . 80
E.2 Artificial networks (AN) . 80
E.2.1 Component powered by LV . 80
E.2.2 Component powered by HV . 82
E.2.3 Direct Current charging Artificial Networks (DC-charging-AN) . 85
E.3 Artificial Mains Networks (AMN) . 86
E.4 Asymmetric Artificial Network (AAN) . 86
E.4.1 General . 86
E.4.2 Signal/control port with symmetric lines . 86
E.4.3 Wired network port with PLC on power lines . 87
E.4.4 Signal/control port with PLC (technology) on control pilot line . 88
E.4.5 Signal/control port with control pilot line . 89
– 4 – CISPR 25:2021 © IEC 2021
Annex F (informative) Radiated emissions from components/modules – Stripline
method . 91
F.1 General . 91
F.2 Test setup . 91
F.2.1 General . 91
F.2.2 Stripline impedance matching . 92
F.2.3 Location of the EUT . 92
F.2.4 Location and length of the test harness . 92
F.2.5 Location of the load simulator . 92
F.3 Test procedure. 92
F.4 Limits for radiated emissions from components/modules – Stripline method . 94
F.5 Stripline design . 96
Annex G (informative) Interference to mobile radio communication in the presence of
impulsive noise – Methods of judging degradation . 99
G.1 General . 99
G.2 Survey of methods of judging degradation to radio channel. 99
G.2.1 General . 99
G.2.2 Subjective tests . 99
G.2.3 Objective tests . 101
G.2.4 Conclusions relating to judgement of degradation . 101
Annex H (normative) Test methods for power supply systems for high voltages in
electric and hybrid vehicles . 102
H.1 General . 102
H.2 Test equipment . 102
H.2.1 Reference ground plane . 102
H.2.2 Power supply, AN, HV-AN, AMN and AAN . 103
H.2.3 Load simulator . 103
H.3 Conducted emission from components/modules on HV power lines – Voltage
method . 103
H.3.1 General . 103
H.3.2 Test setup . 104
H.3.3 Limits for conducted emission – Voltage method . 110
H.4 Conducted emission from components/modules on HV power lines – current
probe method . 111
H.4.1 General . 111
H.4.2 Test setup . 111
H.4.3 Limits for conducted emission – current probe method . 117
H.5 Radiated emissions from components/modules – ALSE method . 117
H.5.1 General . 117
H.5.2 Test setup . 117
H.5.3 Limits for radiated emissions – ALSE method . 123
H.6 Coupling between HV and LV systems . 123
H.6.1 General . 123
H.6.2 Measurement based on test setups defined in Clause 6. 123
H.6.3 Measurement of the HV-LV coupling attenuation . 130
Annex I (Informative) ALSE performance validation 150 kHz to 1 GHz . 133
I.1 General . 133
I.2 Validation method . 135
I.2.1 Overview . 135
CISPR 25:2021 © IEC 2021 – 5 –
I.2.2 Equipment . 135
I.2.3 Procedure . 138
I.2.4 Requirements . 147
Annex J (informative) Measurement instrumentation uncertainty – measurement of
emissions received by an antenna on the same vehicle . 148
J.1 General . 148
J.2 Uncertainty sources . 148
J.3 Measurand . 150
J.4 Input quantities to be considered . 150
J.4.1 General . 150
J.4.2 AM band with OEM passive vehicle antenna (high impedance) . 150
J.4.3 AM band with OEM active vehicle antenna (“matched 50 Ω” impedance) . 150
J.4.4 Others bands (e.g FM, DAB III, …) with OEM active vehicle antenna
(“matched 50 Ω” impedance) . 150
J.4.5 Others bands with reference antenna . 151
Annex K (informative) Uncertainty budgets for measurement of emissions received by
an antenna on the same vehicle . 156
K.1 General . 156
K.2 Typical CISPR 25 uncertainty budgets . 156
K.3 Receiver’s frequency step . 163
Annex L (informative) Measurement instrumentation uncertainty – Emissions from
components/modules – Test methods . 164
L.1 General . 164
L.2 Uncertainty sources . 164
L.3 Measurand . 168
L.4 Input quantities to be considered . 168
Annex M (informative) Uncertainty budgets for emissions from components/modules . 175
M.1 General . 175
M.2 Typical uncertainty budgets . 175
Annex N (informative) Items under consideration . 181
N.1 General . 181
N.2 Measurement techniques and limits . 181
N.3 ALSE performance validation method above 1 GHz . 181
N.4 Reconsideration of the scope of the document . 181
N.5 Reorganizing the document into separate parts similar to CISPR-16
document series . 181
N.6 Inclusion of test setups for WPT charging . 181
Bibliography . 182
Figure 1 – Method of determination of conformance for all frequency bands . 20
Figure 2 – Example of gain curve . 30
Figure 3 – Example of test setup – Vehicle-radiated emissions (front view with
monopole antenna) . 32
Figure 4 – Example of test setup for vehicle with the inlet located on vehicle side
(charging mode 1 or 2, AC powered, without communication) . 34
Figure 5 – Example of test setup for vehicle with the inlet located front / rear of vehicle
(charging mode 1 or 2, AC powered, without communication . 35
Figure 6 – Example of test setup for vehicle with the inlet located on vehicle side
(charging mode 3 or mode 4, with communication) . 38
– 6 – CISPR 25:2021 © IEC 2021
Figure 7 – Example of test setup for vehicle with the inlet located front /rear of vehicle
(charging mode 3 or mode 4, with communication) . 39
Figure 8 – Details of average limits for GPS, BDS,B1l and GLONASS bands –
Complete vehicle . 45
Figure 9 – Conducted emissions – Example of test setup for EUT with power return
line remotely grounded . 50
Figure 10 – Conducted emissions – Example of test setup for EUT with power return
line locally grounded . 51
Figure 11 – Conducted emissions – Example of test setup for alternators and
generators . 52
Figure 12 – Conducted emissions – Example of test setup for ignition system
components . 53
Figure 13 – Conducted emissions – Example of test setup for current probe
measurements . 56
Figure 14 – Test harness bending requirements. 59
Figure 15 – Example of test setup – rod antenna . 61
Figure 16 – Example of test setup – biconical antenna . 62
Figure 17 – Example of test setup – log-periodic antenna . 63
Figure 18 – Example of test setup – above 1 GHz – Horn antenna . 64
Figure 19 – Details of average limit for GPS, BDS, B1l and GLONASS bands –
Components . 72
Figure A.1 – Flow chart for checking the applicability of this document . 73
Figure B.1 – Verification setup . 75
Figure C.1 – Characteristic S of the sheath-current suppressor . 76
Figure D.1 – Example of vehicle test setup for equipment noise . 78
Figure D.2 – Example of vehicle test setup for antenna noise measurement . 79
Figure E.1 – Example of 5 µH AN schematic . 81
Figure E.2 – Characteristics of the AN impedance Z . 81
PB
Figure E.3 – Example of 5 µH HV-AN schematic . 83
Figure E.4 – Example of 5 µH HV-AN combination in a single shielded box . 84
Figure E.5 – Impedance matching network attached between HV-ANs and EUT . 85
Figure E.6 – Example of 5 μH DC-charging-AN schematic . 86
Figure E.7 – Example of an AAN for signal/control port with symmetric lines (e.g. CAN) . 87
Figure E.8 – Example of AAN with wired network port with PLC on AC or
DC power lines . 88
Figure E.9 – Example of AAN circuit for signal/control port with PLC on control pilot . 89
Figure E.10 – Example of AAN circuit for pilot line . 90
Figure F.1 – Example of a basic stripline test setup in a shielded enclosure . 93
Figure F.2 – Example for a 50 Ω stripline . 97
Figure F.3 – Example for a 90 Ω stripline . 98
Figure H.1 – Conducted emission – example for test setup for EUTs with shielded
power supply systems . 106
Figure H.2 – Conducted emission – example of test setup for EUTs with shielded
power supply systems with electric motor attached to the bench . 107
Figure H.3 – Conducted emission – Example of test setup for EUTs with shielded
power supply systems and inverter . 108
CISPR 25:2021 © IEC 2021 – 7 –
Figure H.4 – Conducted emission – Example of test setup for EUTs with shielded
power supply systems and charger device . 109
Figure H.5 – Conducted emission – Example of test setup current probe measurement
on HV lines for EUTs with shielded power supply systems . 113
Figure H.6 – Conducted emission – Example of test setup current probe measurement
on HV lines for EUTs with shielded power supply systems with electric motor attached
to the bench . 114
Figure H.7 – Conducted emission – Example of test setup current probe measurement
on HV lines for EUTs with shielded power supply systems and inverter . 115
Figure H.8 – Conducted emission – Example of test setup current probe measurement
on HV lines for EUTs with shielded power supply systems and charger device . 116
Figure H.9 – Radiated emission – Example of test setup measurement with biconical
antenna for EUTs with shielded power supply systems and with LV lines facing the
antenna . 119
Figure H.10 – Radiated emission – Example of test setup measurement with biconical
antenna for EUTs with shielded power supply systems with electric motor attached to
the bench and with LV lines facing the antenna . 120
Figure H.11 – Radiated emission – Example of test setup measurement with biconical
antenna for EUTs with shielded power supply systems and inverter and with LV lines
facing the antenna . 121
Figure H.12 – Radiated emission – Example of test setup measurement with biconical
antenna for EUTs with shielded power supply systems and charger device and with LV
lines facing the antenna . 122
Figure H.13 – Test setup for calibration of the test signal . 124
Figure H.14 – Example of test setup for conducted emissions – voltage method –
measurement on LV ports with injection on HV supply ports . 125
Figure H.15 – Example of test setup for conducted emissions – current probe method –
measurement on LV ports with injection on HV supply ports . 127
Figure H.16 – Example of test setup for radiated emissions – ALSE method –
measurement with biconical antenna with injection on HV supply ports . 129
Figure H.17 – Test setup for EUT S measurements . 131
Figure H.18 – Examples of requirements for coupling attenuation, a . 132
c
Figure I.1 – Examples of typical ALSE influence parameters over the 10 MHz to
100 MHz frequency range . 134
Figure I.2 – Visual representation of ALSE performance validation process . 135
Figure I.3 – Metallic sheet angles used as support for the rod . 137
Figure I.4 – Radiator side view 50 Ω terminations . 137
Figure I.5 – Photo of the radiator mounted on the ground reference plane . 137
Figure I.6 – Example VSWR measured from four radiation sources (without 10 dB
attenuator) . 138
Figure I.7 – Example setup for ALSE equivalent field strength measurement (rod
antenna shown for the frequency range from 150 kHz to 30 MHz) . 140
Figure I.8 – MoM-Model for the frequency range 30 MHz to 200 MHz . 142
Figure J.1 – Sources of measurement instrumentation uncertainty . 149
Figure K.1 – Example of measurement for frequency step uncertainty evaluation . 163
Figure L.1 – Sources of measurement instrumentation uncertainty – conducted
emissions from components/modules – Voltage method . 165
Figure L.2 – Sources of measurement instrumentation uncertainty – conducted
emissions from components/modules – Current probe method . 166
– 8 – CISPR 25:2021 © IEC 2021
Figure L.3 – Sources of measurement instrumentation uncertainty – radiated emissions
from components/modules – ALSE method . 167
Table 1 – Spectrum analyser parameters . 24
Table 2 – Scanning receiver parameters . 26
Table 3 – Antenna types . 29
Table 4 – Example for limits of disturbance – Complete vehicle – General . 40
Table 5 – Example for limits of disturbance – Complete vehicle – Digital mobile phone . 42
Table 6 – Examples of limits for conducted disturbances – Voltage method . 54
Table 7 – Examples of limits for conducted disturbances – Current probe method . 57
Table 8 – Examples of limits for radiated disturbances – ALSE method – General . 65
Table 9 – Examples of limits for radiated disturbances – ALSE method – Digital mobile
phone . 67
Table E.1 – Magnitude of the AN impedance Z . 82
PB
Table F.1 – Examples of limits for radiated disturbances – Stripline method . 94
Table H.1 – Example for HV limits for conducted voltage measurements at shielded
power supply devices (HV-LV coupling attenuation class A1) . 110
Table H.2 – Example of configurations for equipment without negative LV line . 131
Table H.3 – Example of configurations for equipment with negative LV line . 131
Table H.4 – Examples of requirements for minimum coupling attenuation, a . 132
c
Table I.1 – Reference data to be used for chamber validation . 142
Table J.1 – Input quantities to be considered for voltage at antenna terminal
measurements . 151
Table K.1 – Typical uncertainty budget – Voltage at antenna terminal – AM band with
OEM passive vehicle antenna (high impedance) . 156
Table K.2 – Typical uncertainty budget – Voltage at antenna terminal – AM band with
OEM active vehicle antenna (“matched 50 Ω” impedance) . 159
Table K.3 – Typical uncertainty budget – Voltage at antenna terminal – Others bands
with reference antenna . 161
Table L.1 – Input quantities to be considered for emissions from components/modules . 169
Table M.1 – Typical uncertainty budget – Conducted emissions from
components/modules – Voltage method and current probe method . 175
Table M.2 – Typical uncertainty budget – Radiated emissions from
components/modules – ALSE method . 177
CI
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Frequently Asked Questions
EN IEC 55025:2022 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 on-board receivers". This standard covers: This document contains limits and procedures for the measurement of radio disturbances in the frequency range of 150 kHz to 5 925 MHz. This document applies to vehicles, boats, internal combustion engines, trailers, devices and any electronic/electrical component intended for use in vehicles, boats, trailers and devices. Refer to International Telecommunications Union (ITU) publications for details of frequency allocations. The limits are intended to provide protection for on-board receivers installed (per the manufacturer’s guidelines) in a vehicle from disturbances produced by components/modules in the same vehicle. The receiver types to be protected are, for example, broadcast receivers (sound and television), land mobile radio, radio telephone, amateur, citizens' radio, Satellite Navigation (GPS etc.), WiFi, V2X, and Bluetooth. This document does not include protection of electronic control systems from radio frequency (RF) emissions or from transient or pulse-type voltage fluctuations. These subjects are included in ISO publications. The limits in this document are recommended and subject to modification as agreed between the customer (e.g. vehicle manufacturer) and the supplier (e.g. component manufacturer). This document is also intended to be applied by vehicle manufacturers and suppliers which are to be added and connected to the vehicle harness or to an on-board power connector after delivery of the vehicle. This document defines test methods for use by vehicle manufacturers and suppliers, to assist in the design of vehicles and components and ensure controlled levels of on-board radio frequency emissions. The emission requirements in this document are not intended to be applicable to the intentional transmissions from a radio transmitter as defined by the ITU including their spurious emissions. NOTE 1 This exclusion is limited to those intended transmitter emissions, which leave the EUT as radiated emissions and are coupled onto the wire line in the measurement setup. For conducted transmissions on frequencies intentionally produced by the radio part of an EUT, this exclusion does not apply. NOTE 2 It is usual for customers and suppliers to use radio regulation standards to manage the effect of spurious emissions from a radio transmitter unless limits of spurious emission are agreed in the test plan.
This document contains limits and procedures for the measurement of radio disturbances in the frequency range of 150 kHz to 5 925 MHz. This document applies to vehicles, boats, internal combustion engines, trailers, devices and any electronic/electrical component intended for use in vehicles, boats, trailers and devices. Refer to International Telecommunications Union (ITU) publications for details of frequency allocations. The limits are intended to provide protection for on-board receivers installed (per the manufacturer’s guidelines) in a vehicle from disturbances produced by components/modules in the same vehicle. The receiver types to be protected are, for example, broadcast receivers (sound and television), land mobile radio, radio telephone, amateur, citizens' radio, Satellite Navigation (GPS etc.), WiFi, V2X, and Bluetooth. This document does not include protection of electronic control systems from radio frequency (RF) emissions or from transient or pulse-type voltage fluctuations. These subjects are included in ISO publications. The limits in this document are recommended and subject to modification as agreed between the customer (e.g. vehicle manufacturer) and the supplier (e.g. component manufacturer). This document is also intended to be applied by vehicle manufacturers and suppliers which are to be added and connected to the vehicle harness or to an on-board power connector after delivery of the vehicle. This document defines test methods for use by vehicle manufacturers and suppliers, to assist in the design of vehicles and components and ensure controlled levels of on-board radio frequency emissions. The emission requirements in this document are not intended to be applicable to the intentional transmissions from a radio transmitter as defined by the ITU including their spurious emissions. NOTE 1 This exclusion is limited to those intended transmitter emissions, which leave the EUT as radiated emissions and are coupled onto the wire line in the measurement setup. For conducted transmissions on frequencies intentionally produced by the radio part of an EUT, this exclusion does not apply. NOTE 2 It is usual for customers and suppliers to use radio regulation standards to manage the effect of spurious emissions from a radio transmitter unless limits of spurious emission are agreed in the test plan.
EN IEC 55025:2022 is classified under the following ICS (International Classification for Standards) categories: 33.100.10 - Emission; 33.100.20 - Immunity. The ICS classification helps identify the subject area and facilitates finding related standards.
EN IEC 55025:2022 has the following relationships with other standards: It is inter standard links to EN 55025:2017, EN 55025:2017/AC:2017-11. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN IEC 55025:2022 is associated with the following European legislation: EU Directives/Regulations: 2014/30/EU. 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 IEC 55025:2022 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.
The EN IEC 55025:2022 standard is a comprehensive document that provides essential guidelines regarding the radio disturbance characteristics in vehicles, boats, and internal combustion engines. Its primary scope encompasses the determination of limits and measurement methodologies for radio disturbances occurring within a frequency range of 150 kHz to 5,925 MHz. This ensures that various electrical and electronic components used in vehicles, boats, trailers, and similar devices operate within acceptable levels of radio frequency emissions, thereby protecting on-board receivers from interference. One of the significant strengths of this standard is its focus on safeguarding a wide range of on-board receiver types, including but not limited to broadcast receivers, land mobile radios, GPS, Wi-Fi, and Bluetooth. By establishing clear limits for permissible radio disturbances, this document plays a critical role in enhancing the reliability and efficiency of communication systems integrated within vehicles. Another notable aspect of the EN IEC 55025:2022 standard is its emphasis on collaboration between manufacturers and suppliers to agree upon the limits as per mutual understanding. This collaborative approach fosters innovation and ensures that manufacturers can design their products with the assurance that they will not interfere with the functionality of existing on-board receivers. The defined test methods included in this document are highly relevant for both vehicle manufacturers and component suppliers. They offer a structured framework to facilitate the assessment of vehicles and components prior to installation, helping to maintain controlled levels of radio frequency emissions. This proactive methodology prevents potential disturbances that could arise from new additions to vehicle harnesses or power connectors after the vehicles are delivered. Moreover, the standard excludes the intentional emissions from radio transmitters while providing guidance against spurious emissions, delineating responsibilities and expectations for manufacturers and suppliers. This clear demarcation reduces confusion and helps ensure compliance with international regulations, benefiting manufacturers who regularly navigate complex radio regulation standards. In summary, the EN IEC 55025:2022 standard stands as a vital tool for the automotive and marine industries, enhancing the reliability of electronic communications within vehicles while setting forth clear guidelines for managing radio disturbance characteristics in various applications.
EN IEC 55025:2022は、車両やボート、内燃機関における無線妨害特性に関する非常に重要な標準文書です。この文書は、周波数範囲150 kHzから5,925 MHzまでの無線妨害の測定のための限界値と手順を定めています。また、対象は車両、ボート、内燃機関、トレーラー、デバイス、およびそれらに使用される電子的または電気的コンポーネントであり、車両内での受信機の保護を目的としています。 この標準の大きな強みは、受信機を保護するための具体的な限界を提供することにあります。たとえば、放送受信機（音声およびテレビ）、陸上モバイルラジオ、無線電話、アマチュア無線、市民ラジオ、衛星ナビゲーション（GPSなど）、Wi-Fi、V2X、Bluetoothなど、さまざまな受信機のタイプが含まれます。この広範な適用範囲は、現代の車両やデバイスの多様な電波環境を考慮したものです。 加えて、この文書は、車両メーカーや部品メーカーが新しいコンポーネントを設計する際に役立つ試験方法を定義しています。これにより、車両やコンポーネントが制御されたレベルの車両内無線周波数排出を維持し、消費者のニーズに合った製品を提供できるようになります。 ただし、標準は無線送信機からの意図的な電波送信には適用されず、これは国際電気通信連合（ITU）の定義に基づいています。この特徴により、車両の実際の利用状況における無線の性能を適切に評価し、求められる基準を満たすことが可能になります。 EN IEC 55025:2022は、顧客（車両メーカー）と供給者（部品メーカー）の合意に基づいて修正される可能性のある推奨される限界を提示しています。この点においても、標準が幅広い業界のニーズに柔軟に対応できるよう配慮されていることが窺えます。 全体として、EN IEC 55025:2022は、車両やボートの電子機器が周囲の無線環境と適切にインターフェースを行い、受信機の性能を最大限に発揮できるようサポートするための不可欠な文書です。この標準は、業界の技術基準としての重要性を強調し、無線妨害の管理における基盤を提供します。
SIST EN IEC 55025:2022 표준 문서는 차량, 보트 및 내연기관의 라디오 방해 특성에 대한 한계 및 측정 방법을 제시하고 있습니다. 이 표준의 범위는 150kHz에서 5,925MHz 사이의 주파수에서 발생하는 라디오 방해를 측정하기 위한 절차와 기준을 포함하고 있으며, 차량, 보트, 내연기관, 트레일러 및 이들에 사용되는 전자/전기 부품에 적용됩니다. 이 표준의 강점 중 하나는 다양한 수신기를 보호할 수 있는 명확한 기준을 제시한다는 점입니다. 방송 수신기, 이동통신 라디오, 위성 내비게이션(GPS), Wi-Fi, V2X, Bluetooth 등 여러 유형의 수신기를 보호하기 위한 한계를 규정하고 있어 계측기기 및 구성요소의 설계에 도움을 줍니다. 이를 통해 제조업체는 차량 내의 라디오 주파수 방출을 제어된 수준으로 유지할 수 있으며, 이는 사용자의 안전 및 편의를 높이는 데 기여합니다. 또한, 표준은 고객(예: 차량 제조업체)과 공급업체(예: 부품 제조업체) 간의 합의에 따라 수정이 가능하다는 점에서 유연성을 지니고 있습니다. 이는 공급망 내에서의 요구 사항 변화에 신속하게 대응할 수 있는 장점을 제공합니다. 이 표준은 차량 제조업체와 공급업체가 차량의 배선에 추가되거나 인보드 전원 커넥터에 연결될 부품들의 설계 과정에서 활용할 수 있도록 고안되었습니다. 이는 차량의 전반적인 성능 및 신뢰성을 보장하는 데 매우 중요하며, 궁극적으로는 소비자에게 보다 나은 제품을 제공하는 데 기여할 것입니다. 그러나 이 문서는 전자 제어 시스템을 라디오 주파수(RF) 방출로부터 보호하는 내용을 포함하지 않으며, 이는 ISO 출판물에 포함된 내용을 참조해야 합니다. 이러한 제한을 명확히 하여 각기 다른 기술 요구 사항을 갖는 분야에서의 혼동을 줄이는 것도 이 표준의 중요한 특징입니다.
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