CISPR 20:2006/AMD1:2013

Amemdment 1 - Sound and television broadcast receivers and associated equipment - Immunity characteristics - Limits and methods of measurement

Amendement 1 - Récepteurs de radiodiffusion et de télévision et équipements associés - Caractéristiques d'immunité - Limites et méthodes de mesure

General Information

• Status: Withdrawn
• Publication Date: 28-Oct-2013
• Withdrawal Date: 30-Jul-2020
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 33.100.20 - Immunity
• Technical Committee: CIS/I - Electromagnetic compatibility of information technology equipment, multimedia equipment and receivers
• Current Stage: WPUB - Publication withdrawn
• Completion Date: 31-Jul-2020

Relations

• Amends: CISPR 20:2006 - Sound and television broadcast receivers and associated equipment - Immunity characteristics - Limits and methods of measurement
• Effective Date: 05-Sep-2023

Standards Content (Sample)

CISPR 20 ®
Edition 6.0 2013-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
COMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES

AMENDMENT 1
AMENDEMENT 1
Sound and television broadcast receivers and associated equipment – Immunity
characteristics – Limits and methods of measurement

Récepteurs de radiodiffusion et de télévision et équipements associés –
Caractéristiques d’immunité – Limites et méthodes de mesure
CISPR 20:2006/A1:2013
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CISPR 20 ®
Edition 6.0 2013-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE

COMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES

AMENDMENT 1
AMENDEMENT 1
Sound and television broadcast receivers and associated equipment – Immunity

characteristics – Limits and methods of measurement

Récepteurs de radiodiffusion et de télévision et équipements associés –

Caractéristiques d’immunité – Limites et méthodes de mesure

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX G
ICS 33.100.20 ISBN 978-2-8322-1156-4

– 2 – CISPR 20 Amend.1  IEC:2013
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/444/FDIS CISPR/I/460/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 stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
_____________
2 Normative references
Add the following new reference to the existing list:
IEC 61000-4-6:2008, Electromagnetic compatibility (EMC) – Part 4-6: Testing and
measurement techniques – Immunity to conducted disturbances, induced by radio-frequency
fields
4.1.2 Performance criterion B
Replace the existing text of this subclause by the following new text:
During the application of the test disturbance, degradation of performance is allowed.
However, no unintended change of actual operating state or stored data is allowed to persist
after the test.
After the test, the equipment shall continue to operate as intended without operator
intervention; no degradation of performance or loss of function is allowed, below a
performance level specified by the manufacturer, when the equipment is used as intended.
The performance level may be replaced by a permissible loss of performance.
If the minimum performance level (or the permissible performance loss), or recovery time, is
not specified by the manufacturer, then either of these may be derived from the product
description and documentation, and by what the user may reasonably expect from the
equipment if used as intended.

CISPR 20 Amend.1  IEC:2013 – 3 –
Table 2 – Antenna port
Replace the third and fourth existing rows of this table as follows:
RF voltage See 4.3.3, Table 8 See 5.4 FM radio antenna A
1 kHz, 80 % depth
Common mode Digital radio antenna
AM modulated carrier PC tuner cards for
FM and TV
Car radio FM
Satellite radio
TV antenna
Satellite TV
Ass. video tun.
Antenna
AM radio antenna
Car radio AM
Screening See 4.3.4, Table 8a See 5.5 FM radio antenna see Table 8a
effectiveness
TV antenna
Digital radio antenna
Table 3 – Limits of input immunity from unwanted signals outside the FM range (see
also 5.3.1.2 for the wanted signal)
Replace, in the second existing column, the following values as follows:
a a
66,2 by f – 2f and
n i
a
76,9 by f – f and
n i
b b
129,3 by f + 2f and
n i
b
118,6 by f + f .
n i
Add, at the end of the existing table, the following new text:
Key
f is the wanted signal frequency

n
f is the intermediate frequency
i
– 4 – CISPR 20 Amend.1  IEC:2013
Table 10 – Audio input/output port (excluding loudspeaker and headphone)
Replace the second existing row of this table as follows:
RF voltage See 4.6 See 5.7 Mains powered: A
Table 13
– FM radio antenna
Differential mode
1 kHz, 80 % depth – Digital radio
AM modulated signal
antenna
– TV antenna
– Ass. video tun.
ant.
– Ass. Video
– Ass. audio,
– Ass. other (e.g.
audio amplifier)
– Camcorders, in
playback-mode
– Satellite TV
– Satellite radio
Table 11 – Power input port
Replace the second and third existing rows of this table as follows:
RF voltage See 4.6 See 5.7 Mains powered: A
Common mode Table 12
– FM radio antenna
AM modulated signal 1 kHz, 80 % depth – Digital radio
antenna
Electrical fast 1 kV(peak) IEC 61000-4-4 B
– TV antenna
transients Tr/Th: 5/50 ns Direct injection
Common mode 5 kHz repetition Coupling/decoupling – Ass. video tun.
ant.
frequency network
– Ass. video
– Ass. audio,
– Ass. other (e.g.
audio amplifier)
– Camcorders, in
playback-mode,
– Satellite TV
– Satellite radio
Table 14 – Additional unwanted signal frequencies to be excluded in tests on sound and
television reception functions
Add, in the second existing row of this table, the words “Digital radio antenna” below the
words “FM sound receivers”.
CISPR 20 Amend.1  IEC:2013 – 5 –
Table 15 – Enclosure port
Replace the second and third existing rows of this table as follows:
RF e.m. field See 4.7.1 See 4.7.1 and 5.8 Mains powered: A
– FM radio antenna
AM modulated 1 kHz, at 80 % depth
carrier – Digital radio
antenna
RF e.m. field 900 MHz, 3 V/m, IEC 61000-4-3
– TV antenna
duty cycle 1/8,
a
With measurement
Keyed carrier
– Ass. video tun.
217 Hz repetition
conditions of 5.8.4
frequency ant.
and Table 23. Filter
– Ass. Video
of B.2 replaced by
– Ass. Audio
the one in B.4.
– Ass. other (e.g.
audio amplifier)
– Camcorders, in
playback-mode,
– Satellite TV
– Satellite radio
a
Replace, in the existing footnote to table , the last paragraph by the following new
paragraph:
In any situation where it is necessary to re-test the equipment to show compliance with this
publication, the test method, configuration and parameters originally chosen shall be used in
order to guarantee consistency of the results, unless it is agreed by the manufacturer to do
otherwise.
Add, at the end of the existing table, the following new note:
NOTE In Europe (EEA) additional radiated immunity requirements are specified in EN 55020:2007/A11:2011.
These facilitate coexistence of cable services and broadband mobile services in the frequency range 790 MHz to
862 MHz.
4.7.1.1 FM sound broadcast receivers
Replace the existing title of this subclause by the following new title:
4.7.1.1 FM sound broadcast receivers and digital radio antenna equipment
Replace the first existing sentence of this subclause by the following new sentence:
For equipment with a FM or digital sound broadcast reception function Table 16 applies.

Table 16 – Limits of immunity to ambient electromagnetic fields of FM reception
functions of sound receivers
Replace the existing title of this table by the following new title:
Table 16 – Limits of immunity to ambient electromagnetic fields of FM and digital radio
reception functions of sound receivers
Delete, in the existing note of this table, the words “(= 10,7 MHz)”.

– 6 – CISPR 20 Amend.1  IEC:2013
5.2.2 Audio power-output measurement
Replace the last existing paragraph of this subclause by the following new paragraph:
In any situation where it is necessary to re-test the equipment to show compliance with this
publication, the test method, configuration and parameters originally chosen shall be used in
order to guarantee consistency of the results, unless it is agreed by the manufacturer to do
otherwise.
5.7.1 Measuring circuit and set-up
Add, after the second existing paragraph of this subclause, the following new paragraph:
If the equipment under test is classified as safety class 1 equipment (with PE connector) the
mains stop filter (MSF) must be replaced by a Coupling/Decoupling Network (CDN-M3)
according to IEC 61000-4-6. This CDN has to be suitable for the frequency range up to
150 MHz according to Table B.1 of IEC 61000-4-6:2008.
Add, after the fourth paragraph of this subclause starting with "Annex D.", the following new
paragraphs:
To prevent a short circuit, especially with bridge amplifiers, the minus of loudspeaker
terminals shall not be connected directly to the metallic ground plane.
Also parts 8, 12, 13, 14, 15 and 17 in Figure 8 shall not connect the loudspeaker return wire
to the metallic ground plane or PE. For the return path of the injected RF current a 2,2 nF
capacitor shall be mounted between the minus of the loudspeaker terminal and the ground
terminal of network RCo.
6.1 Significance of a CISPR limit
Replace the last existing paragraph of this subclause by the following new paragraph:
Non-compliance with this standard can be shown only after tests have been carried out in
accordance with 6.1a).
Figure 8 – Measurement of immunity from induced voltages at mains input,
headphones, speakers, audio output, audio input
Replace the existing figure by the following new figure:

CISPR 20 Amend.1  IEC:2013 – 7 –
Wanted signals
1 3
Modulator
out
Lout
T
Audio
Rout
Video Video
out in
L
d)
V
Lout
V
Video R 12
in b) Audio 13 17 14 17
L
R
Rout
Lo 12
Lin
Ro
Audio a)
A
Rin
Lo
Lout
Ai
c)
1 6 Audio
Ro
Rout
Unwanted s
...