CISPR TR 16-3:2000

TECHNICAL CISPR
REPORT 16-3
First edition
2000-05
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
Specification for radio disturbance
and immunity measuring apparatus
and methods –
Part 3:
Reports and recommendations of CISPR
Spécifications des méthodes et des appareils de mesure
des perturbations radioélectriques et de l'immunité
aux perturbations radioélectriques –
Partie 3:
Rapports et recommandations du CISPR

Numéro de référence
Reference number
CISPR 16-3/TR:2000(E)
Revision of this publication
The technical content of IEC and CISPR publications is kept under constant review by the IEC and CISPR, thus

ensuring that the content reflects current technology.

Information on the subjects under consideration and work in progress undertaken by the technical com-mittee
which has prepared this publication, as well as the list of publications issued, is to be found at the following

IEC sources:
• IEC web site*
• Catalogue of IEC publications

Published yearly with regular updates

(On-line catalogue)*
• IEC Bulletin
Available both at the IEC web site* and
as a printed periodical
Terminology used in this publication
Only special terms required for the purpose of this publication are defined herein.
For general terminology, readers are referred to IEC 60050: International Electrotechnical Vocabulary (IEV), which is
issued in the form of separate chapters each dealing with a specific field, the General Index being published as a
separate booklet. Full details of the IEV will be supplied on request.
For terms on radio interference, see Chapter 902.
Graphical and letter symbols
For graphical symbols, and letter symbols and signs approved by the IEC for general use, readers are referred to:
– IEC 60027: Letter symbols to be used in electrical technology;
– IEC 60617: Graphical symbols for diagrams;
The symbols and signs contained in the present publication have either been taken from IEC 60027 or IEC 60617, or
have been specifically approved for the purpose of this publication.
* IEC web site
TECHNICAL
CISPR
REPORT
16-3
First edition
2000-05
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
Specification for radio disturbance
and immunity measuring apparatus
and methods –
Part 3:
Reports and recommendations of CISPR

Spécifications des méthodes et des appareils de mesure
des perturbations radioélectriques et de l'immunité
aux perturbations radioélectriques –
Partie 3:
Rapports et recommandations du CISPR

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– 2 – CISPR 16-3/TR  IEC:2000(E)

CONTENTS
Page
FOREWORD . 3

Clause
1 General. 5

1.1 Scope . 5

1.2 Reference documents . 5
1.3 Definitions . 5
2 Statistics. 8
2.1 Recommendation 2/3: Statistics of complaints and sources of interference
(this recommendation replaces Recommendation 2/2 in CISPR 7B). 8
2.2 Report 48: Statistical considerations in the determination of limits of radio
interference (identical with the text taken from CISPR 8B) . 17
2.3 Recommendation 46/2: Significance of a CISPR limit (this recommendation
replaces Recommendation 46/1, contained in CISPR 7B) . 24
2.4 Report 59: An analytical assessment of statistical parameters of radio
disturbance in the case of an incompletely defined sample . 27
3 A model for the calculation of limits. 33
3.1 Introduction. 33
3.2 Probability of interference . 33
3.3 Circumstances of interferences. 35
3.4 Basic model . 43
3.5 Application of the basic model . 44
3.6 An alternative method used for ISM equipment . 47
4 Technical reports . 55
4.1 Correlation between measurements made with apparatus having characteristics
differing from the CISPR characteristics and measurements made with CISPR
apparatus . 55
4.2 Interference simulators . 61
4.3 Relationship between limits for open-area test site and the reverberating
chamber . 67
4.4 Characterization and classification of the asymmetrical disturbance source
induced in telephone subscriber lines by AM broadcasting transmitters

in the LW, MW and SW bands. 72
4.5 The predictability of radiation in vertical directions at frequencies
above 30 MHz. 105
4.6 The predictability of radiation in vertical directions at frequencies
up to 30 MHz . 162
4.7 Parameters of broadband antennas . 231
5 Background and history . 234
5.1 The history of the CISPR . 234
5.2 Historical background to the method of measurement of the interference power
produced by electrical household and similar appliances in the VHF range . 237

CISPR 16-3/TR © IEC:2000(E) – 3 –

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
SPECIFICATION FOR RADIO DISTURBANCE

AND IMMUNITY MEASURING APPARATUS AND METHODS –

Part 3: Reports and recommendations of CISPR

FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
The main task of IEC technical committees is to prepare International Standards. However, a
technical committee may propose the publication of a technical report when it has collected
data of a different kind from that which is normally published as an International Standard, for
example "state of the art".
Technical reports do not necessarily have to be reviewed until the data they provide are
considered to be no longer valid or useful.

CISPR 16-3, which is a technical report, has been prepared by CISPR subcommittee A: Radio
interference measurements and statistical methods.
The text of this technical report is based on the following documents:
Enquiry draft Report on voting
CISPR/A/CO/67 CISPR/A(CO)82
CISPR/A/CO/77 CISPR/A(CO)84
Full information on the voting for the approval of this technical report 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 3.

– 4 – CISPR 16-3/TR  IEC:2000(E)

This document which is purely informative is not to be regarded as an International Standard.

The text of this report is based on the following documents:

Recommendation 2/2 – p/o CISPR. 7B, 1975; Recommendation 46/1 – p/o CISPR. 11, 1990;

Report 33 – p/o CISPR 8, 1969; Report 38 – p/o CISPR 8, 1969; Report 48 – p/o CISPR 8B,
1975; Report 49 – p/o CISPR 8C, 1980; Report 61 = CISPR 23, 1987; Report 59:
CIS/A(Sec)58 + CIS/A(Sec)58A, 1983; Report: CIS/A(Sec)67 + CIS/A(Sweden)29; RM

2828/CISPR/A, 1985; CIS/A(CO)32, 1985; CIS/A(Sec)58, 1983; CIS/A(Sec)58A, 1983;

CIS/A(Sec)67, 1985; CIS/A(CO)67, 1992; CIS/A(CO)67A, 1993; CIS/A(CO)77A, 1993;

CIS/A(CO)81, 1987; CIS/A(CO)82, 1994; CIS/A(CO)84, 1994; CIS/A(Sec)84, 1987;

CIS/A(Sec)88, 1988; CIS/A(Sec)88A, 1988; CIS/A(Sec)94, 1989; CIS/A(Sec)115, 1991;

CIS/A(Sec)115A, 1991; CIS/A(Sec)116, 1991; CIS/A(Sec)124, 1991; CIS/A(Sec)128, 1992;
CIS/A(Sec)132, 1993; CIS/A/166/CD, 1995.
A bilingual version of this publication may be issued at a later date.

CISPR 16-3/TR © IEC:2000(E) – 5 –

SPECIFICATION FOR RADIO DISTURBANCE

AND IMMUNITY MEASURING APPARATUS AND METHODS –

Part 3: Reports and recommendations of CISPR

1 General
1.1 Scope
This part of CISPR 16 contains recommendations on statistics of disturbance complaints, on
the significance of CISPR limits, on determination of CISPR limits and other specific reports.
Over the years, the CISPR prepared a number of recommendations and reports that have
significant technical merit but were not generally available. Reports and recommendations
were for some time published in CISPR 7 and 8.
At its meeting in Campinas, Brazil, in 1988, subcommittee A agreed on the table of contents
of part 3 and to publish the reports for posterity by giving the reports a permanent place in
part 3.
1.2 Reference documents
IEC 60083:1997, Plugs and socket-outlets for domestic and similar general use standardized
in member countries of IEC
IEC 60364-4, Electrical installations of buildings – Part 4: Protection for safety
CISPR 11:1997, Industrial, scientific and medical (ISM) radio-frequency equipment –
Electromagnetic disturbance characteristics – Limits and methods of measurement
CISPR 13:1996, Limits and methods of measurement of radio interference characteristics of
sound and television broadcast receivers and associated equipment
CISPR 14-1, Electromagnetic compatibility – Requirements for household appliances, electric
tools and similar apparatus – Part 1: Emission
CISPR 16-1:1999, Specification for radio disturbance and immunity measuring apparatus and

methods – Part 1: Radio disturbance and immunity measuring apparatus
CISPR 16-2:1996, Specification for radio disturbance and immunity measuring apparatus and
methods – Part 2: Methods of measurement of disturbances and immunity
ITU-R BS 468-4, Measurement of audio-frequency noise voltage level in sound broadcasting
1.3 Definitions
For the purpose of this part of CISPR 16, the definitions of CISPR 16-1 and IEV 60050(161)
as well as the following definitions apply.

– 6 – CISPR 16-3/TR  IEC:2000(E)

1.3.1
bandwidth (B )
n
width of the overall selectivity curve of the receiver between two points at a stated

attenuation, below the midband response. The bandwidth is represented by the symbol B ,
n
where n is the stated attenuation in decibels

1.3.2
impulse bandwidth (B )
imp
B = A(t) / (2G × IS)
imp max o
where
A(t) is the peak of the envelope at the IF output of the receiver with an impulse
...