CISPR 16-2-1:2008/AMD1:2010

CISPR 16-2-1 ®
Edition 2.0 2010-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
COMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES
AMENDMENT 1
AMENDEMENT 1
Specification for radio disturbance and immunity measuring apparatus and
methods –
Part 2-1: Methods of measurement of disturbances and immunity – Conducted
disturbance measurements
Spécifications des méthodes et des appareils de mesure des perturbations
radioélectriques et de l'immunité aux perturbations radioélectriques –
Partie 2-1: Méthodes de mesure des perturbations et de l'immunité – Mesures
des perturbations conduites
CISPR 16-2-1:2008/A1:2010
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CISPR 16-2-1 ®
Edition 2.0 2010-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
COMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES
AMENDMENT 1
AMENDEMENT 1
Specification for radio disturbance and immunity measuring apparatus and
methods –
Part 2-1: Methods of measurement of disturbances and immunity – Conducted
disturbance measurements
Spécifications des méthodes et des appareils de mesure des perturbations
radioélectriques et de l'immunité aux perturbations radioélectriques –
Partie 2-1: Méthodes de mesure des perturbations et de l'immunité – Mesures
des perturbations conduites
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
M
CODE PRIX
ICS 33.100.10; 33.100.20 ISBN 978-2-88912-098-7
– 2 – CISPR 16-2-1 Amend. 1 © IEC:2010
FOREWORD
This amendment has been prepared by subcommittee A: Radio-interference measurements
and statistical methods, of IEC technical committee CISPR: International special committee
on radio interference in cooperation with CISPR subcommittee D: Electromagnetic
disturbances related to electric/electronic equipment on vehicles and internal combustion
engine powered devices.
The text of this amendment is based on the following documents:
CDV Report on voting
CISPR/A/874/CDV CISPR/A/897/RVC

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 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.
_____________
INTRODUCTION
All stated specifications in CISPR 16-2-1 are met by an instrument independent of the
selected implementation or technology in order to be considered suitable for measurements in
accordance with CISPR standards. The addition of FFT-based measuring instrumentation
requires further specifications as addressed in this amendment. A new Annex F is added as a
result of provisions recently introduced into CISPR 16-1-1 on the use of spectrum analyzers
for compliance measurements.
2 Normative references
Replace the existing reference to CISPR 16-1-1 by the following new reference:
CISPR 16-1-1:2010, Specification for radio disturbance and immunity measuring apparatus
and methods – Part 1-1: Radio disturbance and immunity measuring apparatus – Measuring
apparatus
Remove the existing reference to CISPR/TR 16-3 and its Amendments 1 and 2.
Add to the existing list, the title of the following new standard as follows:
IEC 60050-161:1990, International Electrotechnical Vocabulary (IEV) – Chapter 161:
Electromagnetic Compatibility
CISPR 16-2-1 Amend. 1 © IEC:2010 – 3 –
3 Definitions
Replace the existing term, definition and note 3.7 as follows:
3.7
reference ground plane
RGP
flat conductive surface that constitutes a defined parasitic capacitance to the surrounding of
an EUT and serves as reference potential
NOTE 1 See also IEC 60050-161, 161-04-36.
NOTE 2 A reference ground plane is needed for conducted emission measurements, and serves as reference
ground for unsymmetrical and asymmetrical disturbance voltage measurements.

3.15
measuring receiver
Replace the existing definition and note as follows:
instrument such as a tunable voltmeter, an EMI receiver, a spectrum analyzer or an FFT-
based measuring instrument, with or without preselection, that meets the relevant clauses of
CISPR 16-1-1
NOTE See Annex I of CISPR 16-1-1 for further information.

3.16
test configuration
Delete the existing note in definition 3.16.
Replace the existing term, definition and Notes 1 and 2 in definition 3.19 by the following new
terms, notes and definitions 3.19, 3.19.1, 3.19.2, 3.19.3, 3.19.4 and 3.19.5:
3.19
weighting (of e.g. impulsive disturbance)
pulse-repetition-frequency (PRF) dependent conversion (mostly reduction) of a peak-detected
impulse voltage level to an indication that corresponds to the interference effect on radio
reception
NOTE 1 For the analogue receiver, the psychophysical annoyance of the interference is a subjective quantity
(audible or visual, usually not a certain number of misunderstandings of a spoken text).
NOTE 2 For the digital receiver, the interference effect is an objective quantity that may be defined by the critical
bit error ratio (BER) or bit error probability (BEP) for which perfect error correction can still occur or by another,
objective and reproducible parameter.
3.19.1
weighted disturbance measurement
measurement of disturbance using a weighting detector
3.19.2
weighting characteristic
peak voltage level as a function of PRF for a constant effect on a specific radiocommunication
system, i.e. the disturbance is weighted by the radiocommunication system itself
3.19.3
weighting detector
detector that provides an agreed weighting function

– 4 – CISPR 16-2-1 Amend. 1 © IEC:2010
3.19.4
weighting factor
value of the weighting function relative to a reference PRF or relative to the peak value
NOTE Weighting factor is expressed in dB.
3.19.5
weighting function
weighting curve
relationship between input peak voltage level and PRF for constant level indication of a
measuring receiver with a weighting detector, i.e. the curve of response of a measuring
receiver to repeated pulses
3.20
continuous disturbance
Delete the existing note in definition 3.20.
3.21
discontinuous disturbance
Delete the existing Note 2 in definition 3.21.
Add, after the existing definition 3.30, the following new terms and definitions 3.31, 3.32, 3.33,
and 3.34:
3.31
measurement
process of experimentally obtaining one or more quantity values that can reasonably be
attributed to a quantity
[ISO/IEC Guide 99:2007, 2.1]
3.32
test
technical operation that consists of the determination of one or more characteristics of a given
product, process or service according to a specified procedure
NOTE A test is carried out to measure or classify a characteristic or a property of an item by applying to the item
a set of environmental and operating conditions and/or requirements.
[IEC 60050-151:2001, 151-16-13]
3.33
reference ground
reference potential connecting point
NOTE 1 In some subclauses of this standard the term “ground reference” may be used to denote reference
ground.
NOTE 2 There can only be one reference ground in a conducted disturbance measurement system.
3.34
protective earthing
earthing a point or points in a system or in an installation or in equipment, for purposes of
electrical safety
[IEC 60050-195:1998, 195-01-11]
4.3 Detector functions
Replace the existing item c) of the list as follows:

CISPR 16-2-1 Amend. 1 © IEC:2010 – 5 –
c) an rms-average detector provided for the weighted measurement of broadband
disturbance for the assessment of the effect of impulsive disturbance to digital radio
communication services but also useable for narrowband disturbance;
Add the following new item d) to the existing list:
d) a peak detector which may be used for either broadband or narrowband disturbance
measurement.
5.3 Connections to RF reference ground
In the first sentence of this subclause, delete the existing words “or reference wall.”
6.1 General
Delete the existing item e).
6.2.1 General
Replace the second sentence of this subclause by the following new sentence:
Should the ambient noise level exceed the required level, it shall be recorded in the test
report.
6.5.3 Measurement of the duration of disturbances
Replace the existing text of this subclause by the following new text:
The duration of a disturbance must be known in order to measure it correctly and to determine
if it is discontinuous. The duration of a disturbance may be measured in one of the following
ways:
• through the connection of an oscilloscope to a measuring receiver’s IF output to allow
monitoring of the disturbance in the time-domain;
• through the tuning of either an EMI receiver or a spectrum analyzer to the disturbance
frequency without frequency scanning (i.e. ‘zero-span’ mode) to allow monitoring of the
disturbance in the time-domain; or
• through the use of the time-domain output of an FFT-based measuring receiver.
Guidance for the determination of the appropriate measurement time can be found in 8.3.
6.6.2 Minimum measurement times
Replace the existing first paragraph of this subclause by the following new paragraph:
The minimum measurement (dwell) times are given in Table 2. The minimum measurement
(dwell) times for scanning receivers and FFT-based measuring instruments in Table 2 and the
scan times for spectrum analyzers in Table 1 apply to CW signals. The minimum scan times
of Table 1 were derived to perform measurements in the entire CISPR band.
Add, after the existing Table 1, the following new Table 2:

– 6 – CISPR 16-2-1 Amend. 1 © IEC:2010
Table 2 – Minimum measurement times for the four CISPR bands
Frequency band Minimum
measurement time T
m
A 9 kHz to 150 kHz 10,00 ms
...