EN 55016-1-1:2007

SLOVENSKI STANDARD
01-julij-2007
1DGRPHãþD
SIST EN 55016-1-1:2005
SIST EN 55016-1-1:2005/A1:2005
Specifikacija za merilne naprave in metode za merjenje radijskih motenj in
odpornosti – 1-1. del: Merilne naprave za merjenje radijskih motenj in odpornosti –
Merilne naprave (CISPR 16-1-1:2006/A1:2006)
Specification for radio disturbance and immunity measuring apparatus and methods --
Part 1-1: Radio disturbance and immunity measuring apparatus - Measuring apparatus
Anforderungen an Geräte und Einrichtungen sowie Festlegung der Verfahren zur
Messung der hochfrequenten Störaussendung (Funkstörungen) und Störfestigkeit - Teil
1-1: Geräte und Einrichtungen zur Messung der hochfrequenten Störaussendung
(Funkstörungen) und Störfestigkeit - Messgeräte
Spécifications des méthodes et des appareils de mesure des perturbations
radioélectriques et de l'immunité aux perturbations radioélectriques - Partie 1-1:
Appareils de mesure des perturbations radioélectriques et de l'immunité aux
perturbations radioélectriques - Appareils de mesure
Ta slovenski standard je istoveten z: EN 55016-1-1:2007
ICS:
17.220.20 0HUMHQMHHOHNWULþQLKLQ Measurement of electrical
PDJQHWQLKYHOLþLQ and magnetic quantities
33.100.20 Imunost Immunity
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 55016-1-1
NORME EUROPÉENNE
March 2007
EUROPÄISCHE NORM
ICS 33.100.10 Supersedes EN 55016-1-1:2004 + A1:2005

English version
Specification for radio disturbance
and immunity measuring apparatus and methods -
Part 1-1: Radio disturbance and immunity measuring apparatus -
Measuring apparatus
(CISPR 16-1-1:2006)
Spécifications des méthodes  Anforderungen an Geräte
et des appareils de mesure und Einrichtungen sowie Festlegung
des perturbations radioélectriques der Verfahren zur Messung
et de l'immunité aux perturbations der hochfrequenten Störaussendung
radioélectriques - (Funkstörungen) und Störfestigkeit -
Partie 1-1: Appareils de mesure Teil 1-1: Geräte und Einrichtungen
des perturbations radioélectriques zur Messung der hochfrequenten
et de l'immunité aux perturbations Störaussendung (Funkstörungen)
radioélectriques - und Störfestigkeit -
Appareils de mesure Messgeräte
(CISPR 16-1-1:2006) (CISPR 16-1-1:2006)

This European Standard was approved by CENELEC on 2006-11-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 55016-1-1:2007 E
Foreword
The text of document CISPR/A/642/FDIS, future edition 2 of CISPR 16-1-1, prepared by CISPR SC A,
Radio-interference measurements and statistical methods, was submitted to the IEC-CENELEC parallel
vote and was approved by CENELEC as EN 55016-1-1 on 2006-11-01.
This European Standard supersedes EN 55016-1-1:2004 + A1:2005.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2007-10-01
– latest date by which the national standards conflicting
(dow) 2009-11-01
with the EN have to be withdrawn
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard CISPR 16-1-1:2006 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 16-1-2 NOTE  Harmonized as EN 55016-1-2:2004 (not modified).
CISPR 16-1-3 NOTE  Harmonized as EN 55016-1-3:2006 (not modified).
CISPR 16-1-4 NOTE  Harmonized as EN 55016-1-4:2004 (not modified).
CISPR 16-1-5 NOTE  Harmonized as EN 55016-1-5:2004 (not modified).
CISPR 16-2-1 NOTE  Harmonized as EN 55016-2-1:2004 (not modified).
CISPR 16-2-2 NOTE  Harmonized as EN 55016-2-2:2004 (not modified).
CISPR 16-2-3 NOTE  Harmonized as EN 55016-2-3:2004 (not modified).
CISPR 16-2-4 NOTE  Harmonized as EN 55016-2-4:2004 (not modified).
CISPR 16-4-2 NOTE  Harmonized as EN 55016-4-2:2004 (not modified).
__________
- 3 - EN 55016-1-1:2007
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application 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  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

IEC 60050-161 1990 International Electrotechnical Vocabulary - -
+ A1 1997 (IEV) - - -
+ A2 1998 Chapter 161: Electromagnetic compatibility - -

CISPR 11 (mod) 2003 Industrial scientific and medical (ISM) EN 55011 2007
radio-frequency equipment - Electromagnetic
disturbance characteristics - Limits and
methods of measurement
CISPR 14-1 2005 Electromagnetic compatibility - Requirements EN 55014-1 2006
for household appliances, electric tools and
similar apparatus -
Part 1: Emission
CISPR 16-3 2003 Specification for radio disturbance and - -
immunity measuring apparatus and methods -
Part 3: CISPR technical reports

BIPM/IEC/IFCC/ISO/ 1993 International vocabulary of basic and general - -
IUPAC/IUPAP/OIML terms in metrology (VIM)

INTERNATIONAL
CISPR
ELECTROTECHNICAL
16-1-1
COMMISSION
Edition 2.1
2006-11
Edition 2:2006 consolidated with amendment 1:2006
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
Specification for radio disturbance and immunity
measuring apparatus and methods –
Part 1-1:
Radio disturbance and immunity measuring
apparatus – Measuring apparatus

© IEC 2006 Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical,
including photocopying and microfilm, without permission in writing from the publisher.
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
PRICE CODE
Commission Electrotechnique Internationale CL
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

CISPR 16-1-1 © IEC:2006+A1:2006 – 3 –
CONTENTS
FOREWORD.7

1 Scope.11
2 Normative references .11
3 Terms and definitions .13
4 Quasi-peak measuring receivers for the frequency range 9 kHz to 1 000 MHz .17
5 Measuring receivers with peak detector for the frequency range 9 kHz to 18 GHz .41
6 Measuring receivers with average detector
for the frequency range 9 kHz to 18 GHz.49
7 Measuring receivers with rms detector for the frequency range 9 kHz to 18 GHz .57
8 Measuring receivers for the frequency range 1 GHz to 18 GHz with amplitude
probability distribution (APD) measuring function.63
9 Disturbance analyzers .65

Annex A (normative) Determination of response to repeated pulses of quasi-peak and
r.m.s. measuring receivers (subclauses 3.2, 4.4.2, 7.2.2 and 7.4.1) .83
Annex B (normative) Determination of pulse generator spectrum
(subclauses 4.4, 5.4, 6.4, 7.4).93
Annex C (normative) Accurate measurements of the output of nanosecond pulse
generators (subclauses 4.4, 5.4, 6.4, 7.4) .97
Annex D (normative) Influence of the quasi-peak measuring receiver characteristics
on its pulse response (subclause 4.4.2) .101
Annex E (normative) Response of average and peak measuring receivers
(subclause 6.2.1) .103
Annex F (normative) Performance check of the exceptions from the definitions
of a click according to 4.2.3 of CISPR 14-1.121
Annex G (informative) Rationale for the specifications of the APD measuring function .135

Bibliography.141

Figure 1 – Pulse response curves .25
Figure 2 – Limits of overall selectivity .33
Figure 3 – Arrangement for testing intermodulation effects .35
Figure 4 – Block diagram of an average detector. .55
Figure 5 – Response of the meter simulating network to an intermittent narrowband
signal.55
Figure 6 – Example of a disturbance analyzer.69
Figure 7 – A graphical presentation of test signals used in the test of the analyzer for
the performance check against the definition of a click according to Table 14 .71
Figure 8 – Limits for the overall selectivity – pass band (Band E).47

CISPR 16-1-1 © IEC:2006+A1:2006 – 5 –
Figure E.1 – Correction factor for estimating the ratio B /B for other tuned circuits.105
imp 6
Figure E.2 – Pulse rectification coefficient P .109
Figure E.3 – Example (spectrum) of a pulse-modulated signal
with a pulse width of 200 ns.113
Figure E.4 – Pulse-modulated RF signal applied to a measuring receiver .115
Figure E.5 – Filtering with a B much smaller than the prf .115
imp
Figure E.6– Filtering with a B much wider than the prf.115
imp
Figure E.7 – Calculation of the impulse bandwidth .117
Figure E.8 – Example of a normalized linear selectivity function. .119
Figure F.1 – A graphical presentation of the test signals used for the performance
check of the analyzer with the additional requirements according to Table F.1.133
Figure G.1 – Block diagram of APD measurement circuit without A/D converter.137
Figure G.2 – Block diagram of APD measurement circuit with A/D converter.137
Figure G.3 – Example of display of APD measurement .139

Table 1 – Fundamental characteristics of quasi-peak receivers.17
Table 2 – Test pulse characteristics for quasi-peak measuring receivers .19
Table 3 – Pulse response of quasi-peak receivers .27
Table 4 – Bandwidth characteristics for inter-modulation test of quasi-peak measuring
receivers.37
Table 5 – VSWR requirements for receiver input impedance.41
Table 6 – Bandwidth requirements .41
Table 7 – Relative pulse response of peak and quasi-peak measuring receivers for the
same bandwidth (frequency range 9 kHz to 1 000 MHz).45
Table 8 – Bandwidth requirements .49
Table 9 – Relative pulse response of average and quasi-peak measuring receivers for
the same bandwidth (frequency range 9 kHz to 1 GHz).51
Table 10 – Maximum reading of average measuring receivers for a pulse-modulated
sine-wave input in comparison with the response to a continuous sine-wave having the
same amplitude .55
Table 11 – Bandwidth requirements .59
Table 12 – Relative pulse response of rms and quasi-peak measuring receivers .61
Table 13 – Pulse response of rms measuring receiver .61
Table 14 – Disturbance analyzer performance test – Test signals used for the check
against the definition of a click.73
Table B.1 – Pulse generator characteristics .93
Table E.1 – Carrier level for pulse-modulated signal of 1,4 nVs .111
Table F.1 – Disturbance analyzer test signals .123

CISPR 16-1-1 © IEC:2006+A1:2006 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
___________
SPECIFICATION FOR RADIO DISTURBANCE AND IMMUNITY
MEASURING APPARATUS AND METHODS –

Part 1-1: Radio disturbance and immunity measuring apparatus –
Measuring apparatus
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of 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, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). 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. 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 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 IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard CISPR 16-1-1 has been prepared by CISPR subcommittee A: Radio
interference measurements and statistical methods.
This consolidated version of CISPR 16-1-1 is based on the second edition (2006) [documents
CISPR/A/642/FDIS and CISPR/A/651/RVD] and its amendment 1 (2006) [documents
CISPR/A/647/CDV and CISPR/A/686/RVC].
It bears the edition number 2.1.

CISPR 16-1-1 © IEC:2006+A1:2006 – 9 –
A vertical line in the margin shows where the base publication has been modified by
amendment 1.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The CISPR 16 series, published under the general title Specification for radio disturbance and
immunity measuring apparatus and methods, consists of Parts 1, 2, 3 and 4, each of which is
further subdivided into parts:
– measurement instrumentation specifications are given in the five parts of CISPR 16-1;
– methods of measurement are covered in the four parts of CISPR 16-2;
– various reports with further information and background on CISPR and radio disturbances
in general are given in CISPR 16-3;
– information related to uncertainties, statistics and limit modelling is contained in
CISPR 16-4.
CISPR 16-1 consists of the following parts, under the general title Specification for radio
disturbance and immunity measuring apparatus and methods – Radio disturbance and
immunity measuring apparatus:
• Part 1-1: Measuring apparatus
• Part 1-2: Ancillary equipment – Conducted disturbances
• Part 1-3: Ancillary equipment – Disturbance power
• Part 1-4: Ancillary equipment – Radiated disturbances
• Part 1-5: Antenna calibration test sites for 30 MHz to 1 000 MHz
The committee has decided that the contents of the base publication and its amendments 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.
CISPR 16-1-1 © IEC:2006+A1:2006 – 11 –
SPECIFICATION FOR RADIO DISTURBANCE AND IMMUNITY
MEASURING APPARATUS AND METHODS –

Part 1-1: Radio disturbance and immunity measuring apparatus –
Measuring apparatus
1 Scope
This part of CISPR 16 is designated a basic standard, which specifies the characteristics and
performance of equipment for the measurement of radio disturbance voltages, currents and
fields in the frequency range 9 kHz to 18 GHz. In addition, requirements are specified for
specialized equipment for discontinuous disturbance measurements. The requirements
include the measurement of broadband and narrowband types of radio disturbance.
The receiver types covered include the following:
a) the quasi-peak measuring receiver,
b) the peak measuring receiver,
c) the average measuring receiver,
d) the r.m.s. measuring receiver.
The requirements of this publication shall be complied with at all frequencies and for all levels
of radio disturbance voltages, currents, power or field strengths within the CISPR indicating
range of the measuring equipment.
Methods of measurement are covered in Part 2, and further information on radio disturbance
is given in Part 3 of CISPR 16. Uncertainties, statistics and limit modelling are covered in
Part 4 of CISPR 16.
2 Normative references
The following referenced documents are indispensable for the application 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.
IEC 60050-161:1990, International Electrotechnical Vocabulary (IEV) – Chapter 161:
Electromagnetic compatibility
Amendment 1 (1997)
Amendment 2 (1998)
CISPR 11:2003, Industrial, scientific and medical (ISM) radio-frequency equipment – Electro-
magnetic disturbance characteristics – Limits and methods of measurement
CISPR 14-1:2005, Electromagnetic compatibility – Requirements for household appliances,
electric tools and similar apparatus – Part 1: Emission

CISPR 16-1-1 © IEC:2006+A1:2006 – 13 –
CISPR 16-3:2003, Specification for radio disturbance and Immunity measuring apparatus and
methods – Part 3: CISPR technical reports
BIPM / IEC / IFCC / ISO / IUPAC / IUPAP / OIML:1993, International vocabulary of basic and
general terms in metrology
3 Terms and definitions
For the purpose of this document, the following definitions apply. Also see IEC 60050(161)
and the International vocabulary of basic and general terms in metrology.
3.1
bandwidth
B
n
the 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.
3.2
impulse bandwidth
B
imp
B = A(t) / (2 G × IS)
imp max o
where
is the peak of the envelope at the IF output of the receiver with an impulse area IS
A(t)
max
applied at the receiver input;
G is the gain of the circuit at the centre frequency.
o
Specifically for two critically-coupled tuned transformers,
B = 1,05 × B = 1,31 × B
imp 6 3
where
B and B are respectively the bandwidths at the –6 dB and –3 dB points (see Clause A.2 for
6 3
further information).
3.3
impulse area
IS
the impulse area (sometimes called impulse strength, IS) is the voltage-time area of a pulse
defined by the integral:
+∞
IS = V d(t) t (expressed in μVs or dB(μVs))
∫
−∞
NOTE Spectral density (D) is related to impulse area and expressed in μV/MHz or dB(μV/MHz). For rectangular
impulses of pulse duration T at frequencies f << 1/T, the relationship D (μV/MHz) = 2 ×10 IS (μVs) applies.
3.4
electrical charge time constant
T
C
the time needed after the instantaneous application of a constant sine-wave voltage to the
stage immediately preceding the input of the detector for the output voltage of the detector to
reach 63 % of its final value
CISPR 16-1-1 © IEC:2006+A1:2006 – 15 –
NOTE This time constant is determined as follows: A sine-wave signal of constant amplitude and having a
frequency equal to the mid-band frequency of the i.f. amplifier is applied to the input of the stage immediately
preceding the detector. The indication, D, of an instrument having no inertia (e.g., a cathode-ray oscilloscope)
connected to a terminal in the d.c. amplifier circuit so as not to affect the behaviour of the detector, is noted.
The level of the signal is chosen such that the response of the stages concerned remains within the linear
operating range. A sine-wave signal of this level, applied for a limited time only and having a wave train of
rectangular envelope is gated such that the deflection registered is 0,63 D. The duration of this signal is equal to
the charge time of the detector.
3.5
electrical discharge time constant
T
D
the time needed after the instantaneous removal of a constant sine-wave voltage applied to
the stage immediately preceding the input of the detector for the output of the detector to fall
to 37 % of its initial value
NOTE The method of measurement is analogous to that for the charge time constant, but instead of a signal
being applied for a limited time, the signal is interrupted for a definite time. The time taken for the deflection to fall
to 0,37 D is the discharge time constant of the detector.
3.6
mechanical time constant of a critically damped indicating instrument
T
M
T = T / 2π
M L
where
T is the period of free oscillation of the instrument with all damping removed.
L
NOTE 1 For a critically damped instrument, the equation of motion of the system may be written as:
2 2 2
T (d α / dt ) + 2T (dα / dt) + α = ki
M M
where
α is the deflection;
i is the current through the instrument;
k is a constant.
It can be deduced from this relation that this time constant is also equal to the duration of a rectangular pulse (of
constant amplitude) that produces a deflection equal to 35 % of the steady deflection produced by a continuous
current having the same amplitude as that of the rectangular pulse.
NOTE 2 The methods of measurement and adjustment are deduced from one of the following:
a) The period of free oscillation having been adjusted to 2πT , damping is added so that αT = 0,35α .
M max
b) When the period of oscillation cannot be measured, the damping is adjusted to be just below critical such that
the overswing is not greater than 5 % and the moment of inertia of the movement is such that αT = 0,35α .
max
3.7
overload factor
the ratio of the level that corresponds to the range of practical linear function of a circuit (or a
group of circuits) to the level that corresponds to full-scale deflection of the indicating
instrument
The maximum level at which the steady-state response of a circuit (or group of circuits) does
not depart by more than 1 dB from ideal linearity defines the range of practical linear function
of the circuit (or group of circuits).
3.8
symmetric voltage
in a two-wire circuit, such as a single-phase mains supply, the symmetric voltage is the radio-
frequency disturbance voltage appearing between the two wires. This is sometimes called the
differential mode voltage. If Va is the vector voltage between one of the mains terminals and
earth and Vb is the vector voltage between the other mains terminal and earth, the symmetric
voltage is the vector difference (Va-Vb)

CISPR 16-1-1 © IEC:2006+A1:2006 – 17 –
3.9
CISPR indicating range
it is the range specified by the manufacturer which gives the maximum and the minimum
meter indications within which the receiver meets the requirements of this section of
CISPR 16
4 Quasi-peak measuring receivers for the frequency range 9 kHz to 1 000 MHz
The receiver specification depends on the frequency of operation. There is one receiver
specification covering the frequency range 9 kHz to 150 kHz (band A), one covering 150 kHz
to 30 MHz (band B), one covering 30 MHz to 300 MHz (band C), and one covering 300 MHz
to 1 000 MHz (band D).
4.1 Input impedance
The input circuit of measuring receivers shall be unbalanced. For receiver control settings
within the CISPR indicating range, the input impedance shall be nominally 50 Ω with a v.s.w.r.
not to exceed 2,0 to 1 when the RF attenuation is 0 and 1,2 to 1 when the RF attenuation is
10 dB or greater.
Symmetric input impedance in the frequency range 9 kHz to 30 MHz: to permit symmetrical
measurements a balanced input transformer is used. The preferred input impedance for the
frequency range 9 kHz to 150 kHz is 600 Ω. This symmetric input impedance may be
incorporated either in the relevant symmetrical artificial network necessary to couple to the
receiver or optionally in the measuring receiver.
4.2 Fundamental characteristics
The responses to pulses as specified in 4.4 are calculated on the basis of the measuring
receivers having the following fundamental characteristics.
Table 1 – Fundamental characteristics of quasi-peak receivers
Frequency band
Characteristics Band A Band B Bands C and D
9 kHz to 150 kHz 0,15 MHz to 30 MHz 30 MHz to 1 000 MHz
Bandwidth at the –6 dB points,   0,20   9 120
B in kHz
Detector electrical charge time  45   1   1
constant, in ms
Detector electrical discharge time 500 160 550
constant, in ms
Mechanical time constant of critically 160 160 100
damped indicating instrument, in ms
Overload factor of circuits preceding  24  30  43,5
the detector, in dB
Overload factor of the d.c. amplifier   6  12   6
between detector and indicating
instrument, in dB
NOTE 1 The definition of mechanical time constant (see 3.6) assumes that the indicating instrument is linear,
i.e., equal increments of current produce equal increments of deflection. An indicating instrument having a
different relation between current and deflection may be used provided that the instrument satisfies the
requirements of this subclause. In an electronic instrument, the mechanical time-constant may be simulated by a
circuit.
NOTE 2 No tolerance is given for the electrical and mechanical time constants. The actual values used in a
specific receiver will be determined by the design to meet the requirements in 4.4

CISPR 16-1-1 © IEC:2006+A1:2006 – 19 –
4.3 Sine-wave voltage accuracy
The accuracy of measurement of sine-wave voltages shall be better than ±2 dB when supplied
with a sine-wave signal at 50 Ω resistance source impedance.
4.4 Response to pulses
NOTE Annexes B and C describe methods for determining the output characteristics of a pulse generator for use
in testing the requirements of this subclause.
4.4.1 Amplitude relationship (absolute calibration)
The response of the measuring receiver to pulses of impulse area of a) μVs (microvolt
second) e.m.f. at 50 Ω source impedance, having a uniform spectrum up to at least b) MHz,
repeated at a frequency of c) Hz shall, for all frequencies of tuning, be equal to the response
to an unmodulated sine-wave signal at the tuned frequency having an e.m.f. of r.m.s. value
2 mV (66 dB(μV)). The source impedances of the pulse generator and the signal generator
shall both be the same. A tolerance of ±1,5 dB shall be permitted on the sine-wave voltage
level.
Table 2 – Test pulse characteristics for quasi-peak
measuring receivers
Frequency range b) MHz c) Hz
a) μVs
9 kHz to 150 kHz 13,5 0,15 25
0,15 MHz to 30 MHz 0,316 30 100
30 MHz to 300 MHz 0,044 300 100
300 MHz to 1 000 MHz 0,044 1 000 100

4.4.2 Variation with repetition frequency (relative calibration)
The response of the measuring receiver to repeated pulses shall be such that for a constant
indication on the measuring receiver, the relationship between amplitude and repetition
frequency is in accordance with Figures 1a, 1b or 1c.

CISPR 16-1-1 © IEC:2006+A1:2006 – 21 –

IEC  1290/99
Figure 1a – Pulse response curve (Band A)

CISPR 16-1-1 © IEC:2006+A1:2006 – 23 –
IEC  1291/99
Figure 1b – Pulse response curve (Band B)

IEC  1292/99
Figure 1c – Pulse response curve (Bands C and D)

CISPR 16-1-1 © IEC:2006+A1:2006 – 25 –

IEC  1293/99
Figure 1d – Theoretical pulse response curve of quasi-peak detector receivers
and average detector receiver (see 6.4.2)
Figure 1 – Pulse response curves

CISPR 16-1-1 © IEC:2006+A1:2006 – 27 –
The response curve for a particular measuring receiver shall lie between the limits defined in
the appropriate figure and quantified in Table 3.
Table 3 – Pulse response of quasi-peak receivers
Relative equivalent level in dB of pulse for stated band
Repetition
frequency
Band A Band B Band C Band D
9 kHz to 150 kHz 0,15 MHz to 30 MHz 30 MHz to 300 MHz 300 MHz to 1 000 MHz
Hz
1 000 Note 4
–4,5 ± 1,0 –8,0 ± 1,0 –8,0 ± 1,0
100 0 (ref.) 0 (ref.) 0 (ref.)
–4,0 ± 1,0
60 –3,0 ± 1,0 – – –
25 0 (ref.) – – –
20 –
+6,5 ± 1,0 +9,0 ± 1,0 +9,0 ± 1,0
10 +4,0 ± 1,0 +10,0 ± 1,5 +14,0 ± 1,5 +14,0 ± 1,5
5 – – –
+7,5 ± 1,0
2 +13,0 ± 2,0 +20,5 ± 2,0 +26,0 ± 2,0 +26,0 ± 2,0*
+17,0 ± 2,0 +22,5 ± 2,0 +28,5 ± 2,0 +28,5 ± 2,0*
Isolated pulse +19,0 ± 2,0 +23,5 ± 2,0 +31,5 ± 2,0 +31,5 ± 2,0*
NOTE 1 The influence of the receiver characteristics upon its pulse response is considered in Annex D.
NOTE 2 The relationships between the pulse responses of a quasi-peak receiver and receivers with other
detector types are given in 5.4, 6.4.1 and 7.4.1.
NOTE 3 The theoretical pulse response curves of quasi-peak and average detector receivers combined on an
absolute scale are shown in Figure 1d. The ordinate of Figure 1d shows the open-circuit impulse areas in dB(μVs)
corresponding to the open-circuit sine-wave voltage of 66 dB(μV) r.m.s. The indication on a measuring receiver
with an input matched to the calibrating generators will then be 60 dB(μV). Where the measuring bandwidth is less
than the pulse repetition frequency, the curves of Figure 1d are valid when the receiver is tuned to a discrete line
of the spectrum.
NOTE 4 It is not possible to specify a response above 100 Hz in the frequency range 9 kHz to 150 kHz because
of the overlapping of pulses in the i.f. amplifier.
NOTE 5 Annex A deals with the determination of the curve of response to repeated pulses.
NOTE 6 The pulse response is restricted due to overload at the input to the receiver at frequencies above
300 MHz. The values marked with an asterisk (*) in the table are optional and are not essential.

4.5 Selectivity
4.5.1 Overall selectivity (passband)
The curve representing the overall selectivity of the measuring receiver shall lie within the
limits shown in Figures 2a, 2b or 2c.
Selectivity shall be described by the variation with frequency of the amplitude of the input
sine-wave voltage that produces a constant indication on the measuring receiver.
NOTE For the measurement of equipment that requires higher selectivity at the transition between 130 kHz and
150 kHz (e.g. mains signalling equipment as defined in EN 50065-1/A2), a highpass filter may be added in front of
the measuring receiver to achieve the following combined selectivity of CISPR measuring receiver and highpass
filter:
CISPR 16-1-1 © IEC:2006+A1:2006 – 29 –

Frequency Relative attenuation
kHz dB
≤1
146 ≤6
≥6
≥34
≥81
The measuring receiver in conjunction with the highpass filter should fulfil the requirements of this standard.

4.5.2 Intermediate frequency rejection ratio
The ratio of the input sine-wave voltage at the intermediate frequency to that at the tuned
frequency that produces the same indication of the measuring receiver shall be not less than
40 dB. Where more than one intermediate frequency is used, this requirement shall be met at
each intermediate frequency.
4.5.3 Image frequency rejection ratio
The ratio of the input sine-wave voltage at the image frequency to that at the tuned frequency
that produces the same indication on the measuring receiver shall be not less than 40 dB.
Where more than one intermediate frequency is used, this requirement shall be met at the
image frequencies corresponding to each intermediate frequency.

CISPR 16-1-1 © IEC:2006+A1:2006 – 31 –
IEC  1294/99
Figure 2a – Limits of overall selectivity – pass-band
(see 4.5.1, 5.5, 6.5, 7.5) (Band A)

CISPR 16-1-1 © IEC:2006+A1:2006 – 33 –
Max. bandwidth
Min. bandwidth
–4 kHz/6 dB
5 kHz/6 dB
2 kHz/
1,5 dB
–1,5 dB
–2
–10 –9 –8 –7 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 6 7 8 9 10
–Δf kHz off mid-band +Δf
Figure 2b – Limits of overall selectivity –
pass band (see 4.5.1, 5.5, 6.5, 7.5) (Band B)

Max. bandwidth
Min. bandwidth
–50 kHz/6 dB
70 kHz/6 dB
20 kHz/1,5 dB
–1,5 dB
–2
–140 –120 –100 –80 –60 –40 –20 0 20 40 60 80 100 120 140
–Δf kHz off mid-band +Δf
Figure 2c – Limits of overall selectivity –
passband (see 4.5.1, 5.5, 6.5, 7.5) Bands (C and D)
Figure 2 – Limits of overall selectivity
Relative input for constant output  dB
Relative input for constant output  dB

CISPR 16-1-1 © IEC:2006+A1:2006 – 35 –
4.5.4 Other spurious responses
The ratio of the input sine-wave voltage at frequencies other than those specified in 4.5.2 and
4.5.3 to that at the tuned frequency that produces the same indication on the measuring
receiver shall be not less than 40 dB. Examples of the frequencies from which such spurious
responses may occur are as follows:
(1/m) (nf ± f ) and (1/k) (f )
L i o
where
m, n, k are integers;
f is the local oscillator frequency;
L
f is the intermediate frequency;
i
f is the tuned frequency.
o
NOTE Where more than one intermediate frequency is used, the frequencies f and f may refer to each of the
L i
local oscillator and intermediate frequencies used. In addition, spurious responses may occur when no input signal
is applied to the measuring receiver; for example, when harmonics of the local oscillators differ in frequency by one
of the intermediate frequencies. The requirements under this heading therefore cannot apply in these latter cases.
The effect of these spurious responses is dealt with in 4.7.2.
4.6 Limitation of intermodulation effects
The response of the measuring receiver shall not be influenced by intermodulation effects
when tested as follows.
Arrange the apparatus as shown in Figure 3. The pulse generator has a spectrum sub-
stantially uniform up to frequency 3) but at least 10 dB down at frequency 4) of the
frequencies given in Table 4. The band-stop filter has an attenuation at the test frequency of
at least 40 dB. Its bandwidth, B , relative to the maximum attenuation of the filter shall lie
between the frequencies 1) and 2) given in Table 4.

IEC  1297/99
Responses:
α = α
1a 2a
α = α – 40 dB
1b 1a
α = α – 36 dB
2b 2a
Figure 3 – Arrangement for testing intermodulation effects

CISPR 16-1-1 © IEC:2006+A1:2006 – 37 –
Table 4 – Bandwidth characteristics for intermodulation test
of quasi-peak measuring receivers
Frequency range
1) kHz 2) kHz 3) MHz 4) MHz
9 kHz to 150 kHz (band A) 0,4 4 0,15 0,3
0,15 MHz to 30 MHz (band B) 20 200 30 60
30 MHz to 300 MHz (band C) 500 2 000 300 600
300 MHz to 1 000 MHz (band D) 500 6 000 1 000 2 000

Connect the sine-wave generator output direct to the measuring receiver input and adjust for
a convenient reading. Substitute the pulse generator for the sine-wave generator and adjust
for the same reading. The pulse repetition frequency shall be 100 Hz for band A and 1 000 Hz
for the other bands.
With the pulse generator connected as described above, switching the filter into circuit shall
introduce attenuation of not less than 36 dB.
4.7 Limitation of receiver noise and internally generated spurious signals
4.7.1 Random noise
The background noise shall not introduce an error in excess of 1 dB.
NOTE The point where the background noise causes an error of 1 dB can be found by applying a signal, S, such
that the meter indication is much larger (e.g.40 dB) than the noise level N. By reducing the signal level S, the
meter indication will reach a point, S , where (S + N ) deviates by 1 dB from the linear characteristic.
1 1
4.7.2 Continuous wave
Where more than one intermediate frequency is used, the existence of spurious responses as
described in the note to 4.5.4 shall not introduce a measurement error in excess of 1 dB for
any signal input to the measuring receiver. For a measuring receiver incorporating attenuation
in the i.f. amplifier, this requirement shall be regarded as satisfied if the receiver complies
with 4.7.1 when tested as described in 4.7.1, except that the attenuation in the intermediate
stages shall be introduced after the last mixer stage.
4.8 Screening effectiveness
Screening effectiveness is a measure of the ability of the measuring receiver to operate in an
electromagnetic field without degradation. The requirement applies to receivers operating
within the "CISPR indication range" specified by the manufacturer as described in 3.9.
The screening of the receiver shall be such that when it is immersed in an ambient
electromagnetic field of 3 V/m (unmodulated) at any frequency in the range 9 kHz to
1 000 MHz, an error of not greater than 1 dB is produced at the maximum and minimum of the
CISPR indicating range as specified by the manufacturer of the receiver. In cases where a
measuring receiver is not immune to the requirement of 3 V/m, the field strength and
frequency at which the error exceeds 1 dB shall be stated by the manufacturer. The test shall
be performed as described below.

CISPR 16-1-1 © IEC:2006+A1:2006 – 39 –
The receiver is placed inside a screened enclosure. An input signal is applied to the receiver
via a 2 m long well-screened cable (e.g. semi-rigid), through a feedthrough in the enclosure
wall, to a signal generator placed outside the enclosure. The level of the input signal shall be
at the maximum and the minimum of the CISPR indication range as specified by the
manufacturer of the receiver. All other coaxial terminals of the receiver shall be terminated in
their characteristic impedance.
Only essential leads (e.g. mains and input cables) for the normal use of the measuring
receiver in its minimum configuration (excluding options such as headphones) shall be
connected dur
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