CISPR 20:2002/AMD2:2004
(Amendment)Amendment 2 - Sound and television broadcast receivers and associated equipment - Immunity characteristics - Limits and methods of measurement
Amendment 2 - Sound and television broadcast receivers and associated equipment - Immunity characteristics - Limits and methods of measurement
This amendment gives information concerning the method of objective picture evaluation for the immunity measurements of analogue and digital broadcast receivers and associated equipment.
Amendement 2 - Récepteurs de radiodiffusion et de télévision et équipements associés - Caractéristiques d'immunité - Limites et méthodes de mesure
Le présent amendement fournit des informations concernant la méthode d'évaluation objective de l'image pour les mesures d'immunité des récepteurs de radiodiffusion analogiques et numériques et équipements associés.
General Information
- Status
- Published
- Publication Date
- 13-Dec-2004
- Current Stage
- DELPUB - Deleted Publication
- Start Date
- 27-Nov-2006
- Completion Date
- 26-Oct-2025
Relations
- Effective Date
- 05-Sep-2023
- Effective Date
- 05-Sep-2023
Overview
CISPR 20:2002/AMD2:2004 is an important amendment published by the International Electrotechnical Commission (IEC) that enhances standards related to the immunity characteristics of sound and television broadcast receivers and associated equipment. This amendment particularly focuses on objective picture quality evaluation methods for immunity measurements concerning both analog and digital broadcast receivers. It introduces alternative and objective procedures to assess picture quality, ensuring consistency and improved correlation with subjective evaluation techniques.
Key Topics
Objective Picture Quality Evaluation
Amendment 2 adds information on using objective measurement methods to evaluate picture quality during electromagnetic immunity tests. This approach supports analogue and digital broadcast receivers and offers reliable alternatives that correlate closely with subjective human observations.Immunity Characteristics and Limits
The amendment retains and clarifies limits and methods of measurement for immunity to radio frequency disturbances, detailing how broadcast receivers should resist electromagnetic interference without significant picture or sound degradation.Measurement Procedures
It outlines practical measurement procedures including setups using video camera systems or direct video signal outputs from devices under test (EUT) both with and without displays. The methodology emphasizes minimising geometric distortion, ensuring optical axis alignment, and using fibre optic transmission for minimal electromagnetic interference (EMI).Evaluation Criteria
The amendment defines analogue degradations such as moiré patterns, luminance loss, and synchronization loss, as well as digital degradations like blocking, frozen images, and unrecoverable data stream errors. Acceptable degradation is defined within specific decibel ranges relative to subjective average measurements.Annex K – Objective Picture Evaluation
This informative annex introduces a reference comparison technique leveraging video cameras and image processing algorithms to quantify picture degradation. The method calculates deviations from a recorded reference image captured under interference-free conditions, providing reproducible and objective results.
Applications
Broadcast Receiver Design & Testing
Manufacturers and test laboratories can apply the methods in this amendment to validate and certify the electromagnetic compatibility (EMC) immunity of sound and television broadcast receivers during development and production.Quality Assurance in Multimedia Equipment
The objective picture quality evaluation helps engineers precisely quantify the immunity performance of multimedia receivers and associated equipment, optimizing product robustness against RF disturbances.Standardization and Compliance
Regulatory bodies and certification agencies can use these measurement and evaluation methods to create compliant testing protocols that improve uniformity and repeatability in EMC testing for broadcast devices.Improving Consumer Experience
By adopting objective evaluation techniques alongside conventional subjective ones, product developers can reduce picture degradation in receiver devices, leading to enhanced end-user viewing experiences.
Related Standards
CISPR 29:2004
Provides techniques specifically for objective picture assessment of television broadcast receivers and complements CISPR 20 Amendment 2 by detailing measurement methodologies for immunity characteristics.IEC EMC Standards
Encompassing electromagnetic compatibility standards that address information technology, multimedia, and broadcast equipment immunity requirements.Broadcast Equipment Immunity Standards
A broader family of standards defining limits and test methods for various broadcast-related devices to ensure consistent performance under electromagnetic interference.
This amendment strengthens the electromagnetic immunity testing framework for broadcast receivers by integrating objective picture evaluation techniques, improving test accuracy, reproducibility, and regulatory compliance. Organizations involved in broadcast equipment manufacturing, testing, and certification benefit from applying these methods to ensure premium electromagnetic compatibility and superior picture quality under electromagnetic disturbances.
Frequently Asked Questions
CISPR 20:2002/AMD2:2004 is a standard published by the International Electrotechnical Commission (IEC). Its full title is "Amendment 2 - Sound and television broadcast receivers and associated equipment - Immunity characteristics - Limits and methods of measurement". This standard covers: This amendment gives information concerning the method of objective picture evaluation for the immunity measurements of analogue and digital broadcast receivers and associated equipment.
This amendment gives information concerning the method of objective picture evaluation for the immunity measurements of analogue and digital broadcast receivers and associated equipment.
CISPR 20:2002/AMD2:2004 is classified under the following ICS (International Classification for Standards) categories: 33.100.20 - Immunity. The ICS classification helps identify the subject area and facilitates finding related standards.
CISPR 20:2002/AMD2:2004 has the following relationships with other standards: It is inter standard links to CISPR 20:2002, CISPR 20:2006. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
CISPR 20:2002/AMD2:2004 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
COMMISSION
CISPR
ÉLECTROTECHNIQUE
INTERNATIONALE
INTERNATIONAL
ELECTROTECHNICAL
AMENDEMENT 2
AMENDMENT 2
COMMISSION
2004-12
COMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
Amendement 2
Récepteurs de radiodiffusion et de télévision
et équipements associés –
Caractéristiques d'immunité –
Limites et méthodes de mesure
Amendment 2
Sound and television broadcast receivers
and associated equipment –
Immunity characteristics –
Limits and methods of measurement
� IEC 2004 Droits de reproduction réservés � Copyright - all rights reserved
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
CODE PRIX
PRICE CODE H
Commission Electrotechnique Internationale
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue
– 2 – CISPR 20 Amend. 2 � CEI:2004
AVANT-PROPOS
Cet amendement a été établi par le sous-comité I du CISPR: Compatibilité électromagnétique
des matériels de traitement de l’information, multimédia et récepteurs.
Le texte de cet amendement est issu des documents suivants:
FDIS Rapport de vote
CISPR/I/126/FDIS CISPR/I/134/RVD
Le rapport de vote indiqué dans le tableau ci-dessus donne toute information sur le vote ayant
abouti à l'approbation de cet amendement.
Le comité a décidé que le contenu de cet amendement et de la publication de base ne sera
pas modifié avant la date de maintenance indiquée sur le site web de la CEI sous
"http://webstore.iec.ch" dans les données relatives à la publication recherchée. A cette date,
la publication sera
reconduite,
supprimée,
remplacée par une édition révisée, ou
amendée.
_____________
Page 2
SOMMAIRE
Ajouter, après le titre de l’Annexe J, le titre de la nouvelle Annexe K suivante:
Annexe K (informative) Evaluation objective de la qualité d’image
Page 4
AVANT-PROPOS
Modifier le septième alinéa comme suit:
Les annexes H, J et K sont données uniquement à titre d’information.
CISPR 20 Amend. 2 � IEC:2004 – 3 –
FOREWORD
This amendment has been prepared by CISPR subcommittee I: Electromagnetic compatibility
of information technology equipment, multimedia equipment and receivers.
The text of this amendment is based on the following documents:
FDIS Report on voting
CISPR/I/126/FDIS CISPR/I/134/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the maintenance result date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
reconfirmed,
withdrawn,
replaced by a revised edition, or
amended.
_____________
Page 3
CONTENTS
Add, after the title of Annex J, the title of the following new Annex K:
Annex K (informative) Objective evaluation of picture quality
Page 5
FOREWORD
Modify the seventh paragraph as follows:
Annexes H, J and K are for information only.
– 4 – CISPR 20 Amend. 2 � CEI:2004
Page 16
4.1.1.2 Evaluation de la qualité d’image
Insérer le nouvel alinéa suivant après le 2ème alinéa:
La qualité de l’image peut également être évaluée en utilisant des méthodes de mesure
objectives; une telle méthode est décrite dans l’Annexe K.
Page 34
Tableau 9 – Accès sortie pour haut-parleur et casque
Sous la colonne “Applicabilité” de ce tableau, supprimer le tiret “Radio Ass.”.
Page 36
Tableau 10 – Accès audio entrée/sortie (haut-parleur et casque exclus)
Sous la colonne “Applicabilité” de ce tableau, supprimer le tiret “Radio Ass.”.
Tableau 11 – Accès entrée d'alimentation
Sous la colonne “Applicabilité” de ce tableau, supprimer le tiret “Radio Ass.”.
Page 40
Tableau 15 – Accès par l'enveloppe
Sous la colonne “Applicabilité” de ce tableau, supprimer le tiret “Radio Ass.”.
Page 64
5.5.3 Procédure de mesure pour récepteurs de radiodiffusion à modulation de
fréquence
Supprimer le second alinéa.
Supprimer la Note 1.
Modifier le troisième alinéa de manière à inclure le type de modulation pour le signal utile,
comme suit:
Le récepteur MF de radiodiffusion est alimenté par un générateur fournissant un signal utile
de 60 dB(µV) modul é en fréquence à 1 kHz avec une excursion en fréquence de 40 kHz à la
borne antenne pour la fréquence de réglage du récepteur.
Renuméroter la Note 2, qui devient la Note 1.
CISPR 20 Amend. 2 � IEC:2004 – 5 –
Page 17
4.1.1.2 Evaluation of picture quality
Insert the following new paragraph after the 2nd paragraph:
The picture quality can also be evaluated by using objective measurement methods; one such
method is described in Annex K.
Page 35
Table 9 – Loudspeakers/headphone output port
Delete “Ass. radio” from the “Applicability” column in this table.
Page 37
Table 10 – Audio input/output port (excluding loudspeakers and /headphone)
Delete “Ass. radio” from the “Applicability” column in this table.
Table 11 – Power input port
Delete “Ass. radio” from the “Applicability” column in this table.
Page 41
Table 15 – Enclosure port
Delete “Ass. radio” from the “Applicability” column in this table.
Page 65
5.5.3 Measurement procedure for FM sound receivers
Delete the second paragraph.
Delete Note 1.
Amend the third paragraph to include the type of modulation for the wanted signal, as follows:
The FM sound receiver is fed by a generator providing a wanted signal with a level of
60 dB(µV) frequency modulated with 1 kHz at a frequency deviation of 40 kHz at the antenna
terminal at the tuned frequency of the receiver.
Renumber Note 2 as Note 1.
– 6 – CISPR 20 Amend. 2 � CEI:2004
Page 88
Figure 7 – Dispositif de mesure de l'efficacité du blindage des bornes d'antenne d'un
récepteur de télévision
Remplacer le titre existant de la Figure 7 par le nouveau titre suivant:
Figure 7 – Dispositif de mesure de l'efficacité du blindage des bornes d'antenne des
récepteurs MF de radiodiffusion et des récepteurs de télévision
Page 116
Annexe D – Réseaux d’adaptation et filtre d’arrêt d’alimentation
Figure D.2 – Réseau RC pour sorties audio (RC )
o
Remplacer la légende “Vers l’entrée audio” par «Vers la sortie audio».
Page 118
Figure D.3 – Filtre d'arrêt d'alimentation (MSF)
Modifier la figure en ajoutant un point de connexion à l’intersection entre R2 et R - R .
Page 120
Annexe E – Détails de construction de la cellule ouverte et du filtre d’arrêt
d’alimentation et du haut-parleur
Figure E.8 – Filtre d'arrêt de type LBS (pour connexion au haut-parleur)
Remplacer, dans la légende de la figure, à la page 130, “Fiche et embase”, par «Connexion à
l’appareil en essai (EUT)», et “Connexion à l’appareil en essai – Douille pour connexion à B
et au filtre passe-bas (voir figure B.1)” par «Connexion au filtre passe-bande (voir Figure
B.1)»
Ajouter, après l’Annexe J, la nouvelle Annexe K suivante:
CISPR 20 Amend. 2 � IEC:2004 – 7 –
Page 89
Figure 7 – Measuring set-up for the screening effectiveness of the antenna terminals of
a television receiver
Replace the existing title of Figure 7 with the following new title:
Figure 7 – Measuring set-up for the screening effectiveness of the antenna terminals
of FM sound and television receivers
Page 117
Annex D – Matching networks and mains stop filter
Figure D.2 – RC network for audio outputs (RC )
o
Replace the label “To audio input” with “To audio output”.
Page 119
Figure D.3 – Mains stop filter (MSF)
Modify the figure by adding a connecting point where R2 crosses the connection between R
and R.
Page 121
Annex E – Construction information for the open stripline and for the mains and
loudspeaker band-stop filter
Figure E.8 – Band-stop filter type LBS (for loudspeaker connection)
Replace in the figure, on page 131, the label “Plug and socket” with “Connection to EUT”
and “Connection to equipment under test – Bushing for B and pass filter (see figure B.1)” with
“Connection to band pass filter (see figure B.1)”
Add, after Annex J, the following new Annex K:
– 8 – CISPR 20 Amend. 2 � CEI:2004
Annexe K
(informative)
Évaluation objective de la qualité d’image
K.1� Introduction
La présente annexe fournit des informations concernant la méthode d’évaluation objective de
l’image pour les mesures d’immunité des récepteurs de radiodiffusion analogiques et
numériques et équipements associés.
La méthode d’évaluation objective de l’image utilise les mêmes exigences de signaux utiles et
non désirés que celles définies dans l’Article 5 de la CISPR 20. Elle peut être introduite
comme méthode alternative pour l’évaluation de la qualité d’image avec l’avantage d’une
corrélation directe avec la méthode subjective.
La corrélation avec la méthode subjective est donnée lorsque la méthode objective remplit les
exigences suivantes:
– détection des dégradations analogiques dans une gamme de ±6 dB par rapport au résultat
de mesure subjectif moyen;
– détection des dégradations numériques dans une gamme de ±2 dB par rapport au résultat
de mesure subjectif moyen;
– reproductibilité dans une gamme de �2 dB.
Le résultat de mesure subjectif moyen est défini comme la valeur moyenne des résultats de
mesure subjectifs d’au moins 5 opérateurs expérimentés différents.
K.2 Références
CISPR 29:2004, Television broadcast receivers and associated equipment – Immunity
characteristics – Methods of objective picture assessment (en anglais seulement)
K.3 Définitions et abréviations
K.3.1 Définitions
K.3.1.1
dégradations analogiques
les dégradations analogiques sont définies par:
� mire superposée, moiré;
� perte de luminance et contraste;
� perte de couleur;
� perte de synchronisation.
K.3.1.2
dégradations numériques
les dégradations numériques sont définies par:
� blocage;
� mire gelée, arrêt d’élément mobile;
� erreur irrécupérable de flots de données, écran noir.
CISPR 20 Amend. 2 � IEC:2004 – 9 –
Annex K
(informative)
Objective evaluation of picture quality
K.1 Introduction
This annex gives information concerning the method of objective picture evaluation for the
immunity measurements of analogue and digital broadcast receivers and associated
equipment.
The method of objective picture evaluation uses the same unwanted and wanted signal
requirements as defined in Clause 5 of CISPR 20. It can be introduced as an alternative
method for the evaluation of picture quality with the benefit of a direct correlation with the
subjective method.
Correlation with the subjective method is given, when the objective method fulfils the following
demands:
– detection of analogue degradations within a range of ±6 dB related to the average
subjective measurement result;
– detection of digital degradations within a range of ±2 dB related to the average subjective
measurement result;
– reproducibility in a range of �2 dB.
The average subjective measurement result is defined as the average value of the subjective
measurement results from at least 5 different experienced operators.
K.2 References
CISPR 29:2004, Television broadcast receivers and associated equipment – Immunity
characteristics – Methods of objective picture assessment
K.3 Definitions and abbreviations
K.3.1 Definitions
K.3.1.1�
analogue degradations
analogue degradations are defined by:
� superimposed pattern, moiré;
� loss of luminance and contrast;
� loss of colour;
� loss of synchronisation.
K.3.1.2
digital degradations
digital degradations are defined by:
� blocking;
� frozen pattern, stop of moving element;
� irrecoverable data stream error, black screen.
– 10 – CISPR 20 Amend. 2 � CEI:2004
K.3.1.3
système de caméra vidéo
appareil destiné à capturer les dégradations d’image sur l’afficheur de l’appareil en essai
(EUT) pour l’évaluation objective de la qualité d’image
K.3.2 Abréviations
CAG Commande automatique de gain
CCD Dispositif à couplage de charge
CCVS Signal vidéo en cou
...




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