SIST EN 55016-4-2:2005
(Main)Specification for radio disturbance and immunity measuring apparatus and methods -- Part 4-2: Uncertainties, statistics and limit modelling - Uncertainty in EMC measurements
Specification for radio disturbance and immunity measuring apparatus and methods -- Part 4-2: Uncertainties, statistics and limit modelling - Uncertainty in EMC measurements
This part of CISPR 16 is designated a basic standard, which specifies the manner in which measurement uncertainty is to be taken in to account in determining compliance with CISPR limits. The material is also relevant to any EMC test when interpretation of the results and conclusions reached will be impacted by the uncertainty of the instrumentation used during the testing. Annex A contains the background material used in providing the amount of measurement uncertainty found in generating the CISPR values shown in Clause 4 and hence provides valuable background material for those needing both initial and further information on measurement uncertainty and how to take into account individual uncertainties in the measurement chain. The annex however is not intended to be a tutorial of user manual or to be copied when making uncertainty calculations. CISPR 16-1, CISPR 16-2, CISPR 16-3 and CISPR 16-4 have been reorganised into 14 parts, to accommodate growth and easier maintenance. This first edition of CISPR 16-4-2 cancels and replaces the first edition of CISPR 16-4 published in 2002. It contains the clauses of CISPR 16-4 without technical changes.
Anforderungen an Geräte und Einrichtungen sowie Festlegung der Verfahren zur Messung der hochfrequenten Störaussendung (Funkstörungen) und Störfestigkeit -- Teil 4-2: Unsicherheiten, Statistik und Modelle zur Ableitung von Grenzwerten (Störmodell) - Unsicherheit bei EMV-Messungen
Spécifications des méthodes et des appareils de mesure des perturbations radioélectriques et de l'immunité aux perturbations radioélectriques -- Partie 4-2: Incertitudes, statistiques et modélisation des limites - Incertitudes de mesure CEM
La présente partie de la CISPR 16 est une norme fondamentale qui spécifie la manière dont il faut prendre en compte les incertitudes de mesure lors de la détermination de la conformité aux limites du CISPR. Cela s'applique également à tous les essais CEM lorsque les interprétations des résultats et les conclusions peuvent être influencées par l'incertitude de l'instrumentation utilisée pendant les essais. L'annexe A contient les informations utilisées pour fournir la valeur de l'incertitude de mesure CISPR donnée à l'article 4 et, en conséquence, fournit des informations importantes pour ceux qui ont besoin à la fois de l'information initiale et de l'information complémentaire sur les incertitudes de mesure et sur la façon de prendre en compte les incertitudes individuelles dans la chaîne de mesure. Toutefois, l'annexe A n'est pas destinée à être un modèle de manuel d'utilisateur ou à être recopiée lors des calculs d'incertitude. Les publications CISPR 16-1, CISPR 16-2, CISPR 16-3 and CISPR 16-4 ont été réorganisées en 14 parties, dans le but de pouvoir gérer plus facilement leur évolution et maintenance. Cette première édition de la CISPR 16-4-2 annule et remplace la CISPR 16-4 publiée en 2002. Elle contient les articles de la CISPR 16-4 sans modifications de leur contenu technique.
Specifikacija za merilne naprave in metode za merjenje radijskih motenj in odpornosti – 4-2. del: Modeliranje negotovosti, statistike in mejnih vrednosti – Negotovost pri meritvah EMC (CISPR 16-4-2:2003)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 55016-4-2:2005
01-julij-2005
Specifikacija za merilne naprave in metode za merjenje radijskih motenj in
odpornosti – 4-2. del: Modeliranje negotovosti, statistike in mejnih vrednosti –
Negotovost pri meritvah EMC (CISPR 16-4-2:2003)
Specification for radio disturbance and immunity measuring apparatus and methods --
Part 4-2: Uncertainties, statistics and limit modelling - Uncertainty in EMC measurements
Anforderungen an Geräte und Einrichtungen sowie Festlegung der Verfahren zur
Messung der hochfrequenten Störaussendung (Funkstörungen) und Störfestigkeit -- Teil
4-2: Unsicherheiten, Statistik und Modelle zur Ableitung von Grenzwerten (Störmodell) -
Unsicherheit bei EMV-Messungen
Spécifications des méthodes et des appareils de mesure des perturbations
radioélectriques et de l'immunité aux perturbations radioélectriques -- Partie 4-2:
Incertitudes, statistiques et modélisation des limites - Incertitudes de mesure CEM
Ta slovenski standard je istoveten z: EN 55016-4-2:2004
ICS:
17.220.20 0HUMHQMHHOHNWULþQLKLQ Measurement of electrical
PDJQHWQLKYHOLþLQ and magnetic quantities
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
SIST EN 55016-4-2:2005 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 55016-4-2:2005
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SIST EN 55016-4-2:2005
EUROPEAN STANDARD EN 55016-4-2
NORME EUROPÉENNE
EUROPÄISCHE NORM October 2004
ICS 33.100.10; 33.100.20
English version
Specification for radio disturbance and immunity measuring
apparatus and methods
Part 4-2: Uncertainties, statistics and limit modelling –
Uncertainty in EMC measurements
(CISPR 16-4-2:2003)
Spécifications des méthodes Anforderungen an Geräte und
et des appareils de mesure Einrichtungen sowie Festlegung der
des perturbations radioélectriques Verfahren zur Messung der
et de l'immunité aux perturbations hochfrequenten Störaussendung
radioélectriques (Funkstörungen) und Störfestigkeit
Partie 4-2: Incertitudes, statistiques Teil 4-2: Unsicherheiten, Statistik
et modélisation des limites – und Modelle zur Ableitung von
Incertitudes de mesure CEM Grenzwerten (Störmodell) –
(CISPR 16-4-2:2003) Unsicherheit bei EMV-Messungen
(CISPR 16-4-2:2003)
This European Standard was approved by CENELEC on 2004-09-01. 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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and 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
© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 55016-4-2:2004 E
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SIST EN 55016-4-2:2005
EN 55016-4-2:2004 - 2 -
Foreword
The text of the International Standard CISPR 16-4-2:2003, prepared by CISPR SC A, Radio-
interference measurements and statistical methods, was submitted to the formal vote and was
approved by CENELEC as EN 55016-4-2 on 2004-09-01 without any modification.
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) 2005-09-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2007-09-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard CISPR 16-4-2:2003 was approved by CENELEC as a European
Standard without any modification.
__________
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SIST EN 55016-4-2:2005
- 3 - EN 55016-4-2:2004
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
CISPR 16-1 Series Specification for radio disturbance and EN 55016-1 Series
immunity measuring apparatus and
methods
Part 1: Radio disturbance and immunity
measuring apparatus
CISPR 16-2 Series Part 2: Methods of measurement of EN 55016-2 Series
disturbances and immunity
1)
CISPR/TR 16-3 - Part 3: CISPR technical reports - -
1)
CISPR/TR 16-4-1 - Part 4-1: Uncertainties, statistics and - -
limit modeling - Uncertainties in
standardized EMC tests
1)
CISPR/TR 16-4-3 - Part 4-3: Uncertainties, statistics and - -
limit modelling - Statistical
considerations in the determination of
EMC compliance of mass-produced
products
1)
CISPR/TR 16-4-4 - Part 4-4: Uncertainties, statistics and - -
limit modeling - Statistics of complaints
and a model for the calculation of limits
1)
Undated reference.
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SIST EN 55016-4-2:2005
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SIST EN 55016-4-2:2005
COMMISSION
CISPR
ELECTROTECHNIQUE
16-4-2
INTERNATIONALE
INTERNATIONAL
Première édition
ELECTROTECHNICAL
First edition
2003-11
COMMISSION
COMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
Spécifications des méthodes et des appareils
de mesure des perturbations radioélectriques et
de l'immunité aux perturbations radioélectriques –
Partie 4-2:
Incertitudes, statistiques et modélisation des
limites – Incertitudes de mesure CEM
Specification for radio disturbance and immunity
measuring apparatus and methods –
Part 4-2:
Uncertainties, statistics and limit modelling –
Uncertainty in EMC measurements
” IEC 2003 Droits de reproduction réservés Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
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Pour prix, voir catalogue en vigueur
For price, see current catalogue
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SIST EN 55016-4-2:2005
CISPR 16-4-2 ” IEC:2003 – 3 –
CONTENTS
FOREWORD.5
INTRODUCTION.7
TABLE RECAPITULATING CROSS-REFERENCES .9
1 Scope.11
2 Normative references .11
3 Definitions and symbols.13
3.1 General symbols .13
3.2 Measurands .13
3.3 Input quantities.13
4 Measurement instrumentation uncertainty .15
4.1 Overview .15
4.2 Quantities to be considered for conducted disturbance measurements at a
mains port .17
4.3 Quantities to be considered for disturbance power measurements.17
4.4 Quantities to be considered for radiated disturbance measurements of
electric field strength on an open area test site or alternative test site .17
Annex A (informative) Basis for U values in Table 1.21
cispr
Bibliography.43
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SIST EN 55016-4-2:2005
CISPR 16-4-2 ” IEC:2003 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
____________
SPECIFICATION FOR RADIO DISTURBANCE AND IMMUNITY
MEASURING APPARATUS AND METHODS –
Part 4-2: Uncertainties, statistics and limit modelling –
Uncertainty in EMC measurements
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 16-4-2 has been prepared by CISPR subcommittee A: Radio
interference measurements and statistical methods.
This first edition of CISPR 16-4-2 cancels and replaces the first edition of CISPR 16-4
published in 2002. It contains the clauses of CISPR 16-4 without technical changes.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
2006. At this date, the publication will be
x reconfirmed;
x withdrawn;
x replaced by a revised edition, or
x amended.
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SIST EN 55016-4-2:2005
CISPR 16-4-2 ” IEC:2003 – 7 –
INTRODUCTION
CISPR 16-1, CISPR 16-2, CISPR 16-3 and CISPR 16-4 have been reorganised into 14 parts,
to accommodate growth and easier maintenance. The new parts have also been renumbered.
See the list given below.
Old CISPR 16 publications New CISPR 16 publications
Measuring apparatus
CISPR 16-1-1
CISPR 16-1-2 Ancillary equipment – Conducted disturbances
Radio disturbance
and immunity
Ancillary equipment – Disturbance power
CISPR 16-1-3
CISPR 16-1
measuring
apparatus
Ancillary equipment – Radiated disturbances
CISPR 16-1-4
Antenna calibration test sites for 30 MHz to
CISPR 16-1-5
1 000 MHz
CISPR 16-2-1 Conducted disturbance measurements
Methods of
Measurement of disturbance power
CISPR 16-2-2
measurement of
CISPR 16-2
disturbances and
CISPR 16-2-3 Radiated disturbance measurements
immunity
CISPR 16-2-4
Immunity measurements
CISPR 16-3 CISPR technical reports
CISPR 16-4-1 Uncertainties in standardised EMC tests
Reports and
CISPR 16-3 recommendations Measurement instrumentation uncertainty
CISPR 16-4-2
of CISPR
Statistical considerations in the
CISPR 16-4-3
determination of EMC compliance of mass-
produced products
Statistics of complaints and a model for the
Uncertainty in EMC
CISPR 16-4 CISPR 16-4-4
calculation of limits
measurements
More specific information on the relation between the ‘old’ CISPR 16-4 and the present ‘new’
CISPR 16-4-2 is given in the table after this introduction (TABLE RECAPITULATING CROSS
REFERENCES).
Measurement instrumentation specifications are given in five new parts of CISPR 16-1, while
the methods of measurement are covered now in four new 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. CISPR 16-4 contains information related to uncertainties, statistics
and limit modelling.
CISPR 16-4 consists of the following parts, under the general title Specification for radio
disturbance and immunity measuring apparatus and methods - Uncertainties, statistics and
limit modelling:
x Part 4-1: Uncertainties in standardised EMC tests,
x Part 4-2: Uncertainty in EMC measurements,
x Part 4-3: Statistical considerations in the determination of EMC compliance of mass-
produced products,
x Part 4-4: Statistics of complaints and a model for the calculation of limits.
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SIST EN 55016-4-2:2005
CISPR 16-4-2 ” IEC:2003 – 9 –
TABLE RECAPITULATING CROSS-REFERENCES
First edition of CISPR 16-4 First edition of CISPR 16-4-2
Clauses Clauses
1 1
2 2
3 3
4 4
Annex Annex
A A
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SIST EN 55016-4-2:2005
CISPR 16-4-2 ” IEC:2003 – 11 –
SPECIFICATION FOR RADIO DISTURBANCE AND IMMUNITY
MEASURING APPARATUS AND METHODS –
Part 4-2: Uncertainties, statistics and limit modelling –
Uncertainty in EMC measurements
1 Scope
This part of CISPR 16 is designated a basic standard, which specifies the manner in which
measurement uncertainty is to be taken in to account in determining compliance with CISPR
limits. The material is also relevant to any EMC test when interpretation of the results and
conclusions reached will be impacted by the uncertainty of the instrumentation used during
the testing. Annex A contains the background material used in providing the amount of
measurement uncertainty found in generating the CISPR values shown in Clause 4 and hence
provides valuable background material for those needing both initial and further information
on measurement uncertainty and how to take into account individual uncertainties in the
measurement chain. The annex however is not intended to be a tutorial of user manual or to
be copied when making uncertainty calculations. For that, the references shown in the
bibliography should be used.
Measurement instrumentation specifications are given in CISPR 16-1, while the methods of
measurement are covered in CISPR 16-2. Further information and background on CISPR and
radio disturbances is given in CISPR 16-3. The other parts of CISPR 16-4 contain further
information on uncertainties in general, statistics and limit modelling.
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.
CISPR 16-1 (all parts), Specification for radio disturbance and immunity measuring apparatus
and methods – Radio disturbance and immunity measuring apparatus
CISPR 16-2 (all parts), Specification for radio disturbance and immunity measuring apparatus
and methods – Methods of measurement of disturbances and immunity
CISPR 16-3, Specification for radio disturbance and immunity measuring apparatus and
methods – Part 3: CISPR technical reports
CISPR 16-4-1, Specification for radio disturbance and immunity measuring apparatus and
methods – Part 4-1: Uncertainties, statistics and limit modelling - Uncertainties in
standardised EMC tests
CISPR 16-4-3, Specification for radio disturbance and immunity measuring apparatus and
methods – Part 4-3: Uncertainties, statistics and limit modelling - Statistical considerations in
the determination of EMC compliance of mass-produced products
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SIST EN 55016-4-2:2005
CISPR 16-4-2 ” IEC:2003 – 13 –
CISPR 16-4-4, Specification for radio disturbance and immunity measuring apparatus and
methods – Part 4-4: Uncertainties, statistics and limit modelling – A model for the calculation
of limits
3 Definitions and symbols
For the purpose of this part of CISPR 16, the following symbols apply.
NOTE General uncertainty terms and definitions used in uncertainty are contained in bibliography reference [2].
General definitions are contained in bibliography reference [1]. These definitions will not be repeated here.
3.1 General symbols
X input quantity
i
x estimate of X
i i
u(x ) standard uncertainty of x
i i
c sensitivity coefficient
i
y result of a measurement, (the estimate of the measurand), corrected for all
recognised significant systematic effects
u (y) (combined) standard uncertainty of y
c
k coverage factor
U expanded uncertainty of y
3.2 Measurands
V Voltage, in dB(PV)
P Disturbance power, in dB(pW)
E Electric field strength, in dB(PV/m)
3.3 Input quantities
V Receiver voltage reading, in dB(PV)
r
L Attenuation of the connection between the receiver and the artificial mains network,
c
absorbing clamp or antenna, in dB
L Voltage division factor of the AMN, in dB
amn
L Insertion loss of the absorbing clamp, in dB
ac
AF Antenna factor, in dB(/m)
GV Correction for receiver sine wave voltage inaccuracy, in dB
sw
GV Correction for imperfect receiver pulse amplitude response, in dB
pa
GV Correction for imperfect receiver pulse repetition rate response, in dB
pr
GV Correction for the effect of the receiver noise floor, in dB
nf
GM Correction for the error caused by mismatch, in dB
GMD Correction for the error caused by mains disturbances, in dB
GZ Correction for imperfect AMN impedance, in dB
GE Correction for the effect of the environment, in dB
GAF Correction for antenna factor interpolation error, in dB
f
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SIST EN 55016-4-2:2005
CISPR 16-4-2 ” IEC:2003 – 15 –
GAF Correction for the difference between the antenna factor variation with height, and
h
the variation with height of the antenna factor of a reference dipole, in dB
GA Correction for antenna directivity, in dB
dir
GA Correction for antenna phase centre location, in dB
ph
GA Correction for antenna cross-polarisation response, in dB
cp
GA Correction for antenna unbalance, in dB
bal
GSA Correction for imperfect site attenuation, in dB
Gd Correction for imperfect antenna distance, in dB
Gh Correction for imperfect table height above ground plane, in dB
4 Measurement instrumentation uncertainty
4.1 Overview
Measurement instrumentation uncertainty shall be taken into account when determining
compliance or non-compliance with a disturbance limit.
The measurement instrumentation uncertainty for a test laboratory shall be evaluated for
those measurements addressed in the following subclauses, taking into consideration each of
the quantities listed there. The standard uncertainty u(x ) in decibels and the sensitivity
i
coefficient c shall be evaluated for the estimate x of each quantity. The combined standard
i i
uncertainty u (y) of the estimate y of the measurand shall be calculated as
c
2 2
u (y) c u (x )
c ¦ i i
i
The expanded measurement instrumentation uncertainty U for a test laboratory shall be
lab
calculated as
U 2 u (y)
lab c
and shall be stated in the test report.
NOTE 1 The coverage factor k = 2 yields approximately a 95 % level of confidence for the near-normal
distribution typical of most measurement results.
Compliance or non-compliance with a disturbance limit shall be determined in the following
manner.
If U is less than or equal to U in Table 1, then:
lab cispr
compliance is deemed to occur if no measured disturbance exceeds the disturbance limit;
non-compliance is deemed to occur if any measured disturbance exceeds the disturbance
limit.
NOTE U resembles a value of measurement uncertainty for a specific test, which was determined by
cispr
considering uncertainties associated with the quantities listed in 4.2.
If U is greater than U in Table 1, then:
lab cispr
compliance is deemed to occur if no measured disturbance, increased by (U – U ),
lab cispr
exceeds the disturbance limit;
non-compliance is deemed to occur if any measured disturbance, increased by
(U – U ), exceeds the disturbance limit.
lab cispr
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SIST EN 55016-4-2:2005
CISPR 16-4-2 ” IEC:2003 – 17 –
Table 1 – Values of U
cispr
Measurement U
cispr
(9 kHz – 150 kHz) 4,0 dB
Conducted disturbance (mains port)
(150 kHz – 30 MHz) 3,6 dB
Disturbance power (30 MHz – 300 MHz) 4,5 dB
Radiated disturbance (electric field strength on an open area test
(30 MHz – 1 000 MHz) 5,2 dB
site or alternative test site)
Under
Other
consideration
NOTE 2 The values of U in Table 1 are based on the expanded uncertainties in Annex A, which were
cispr
evaluated by considering uncertainties associated with the quantities listed below.
Nothing in this clause removes the requirement for measuring apparatus to comply with
specifications in CISPR 16-1.
4.2 Quantities to be considered for conducted disturbance measurements
at a mains port
– Receiver reading
– Attenuation of the connection between artificial mains network and receiver
– Artificial mains network voltage division factor
– Receiver sine-wave voltage accuracy
– Receiver pulse amplitude response
– Receiver pulse response variation with repetition frequency
– Receiver noise floor
– Mismatch effects between artificial mains network receiver port and receiver
– Artificial mains network impedance
4.3 Quantities to be considered for disturbance power measurements
– Receiver reading
– Attenuation of the connection between absorbing clamp and receiver
– Absorbing clamp insertion loss
– Receiver sine-wave voltage accuracy
– Receiver pulse amplitude response
– Receiver pulse response variation with repetition frequency
– Receiver noise floor
– Mismatch effects between absorbing clamp receiver port and receiver
– Effect of mains disturbances
– Effect of environment
4.4 Quantities to be considered for radiated disturbance measurements of electric
field strength on an open area test site or alternative test site
– Receiver reading
– Attenuation of the connection between antenna and receiver
– Antenna factor
– Receiver sine-wave voltage accuracy
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SIST EN 55016-4-2:2005
CISPR 16-4-2 ” IEC:2003 – 19 –
– Receiver pulse amplitude response
– Receiver pulse response variation with repetition frequency
– Receiver noise floor
– Mismatch effects between antenna port and receiver
– Antenna factor frequency interpolation
– Antenna factor variation with height
– Antenna directivity
– Antenna phase centre
– Antenna cross-polarisation response
– Antenna balance
– Test site
– Separation between equipment under test and measurement antenna
– Height of table supporting the equipment under test
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SIST EN 55016-4-2:2005
CISPR 16-4-2 ” IEC:2003 – 21 –
Annex A
(informative)
Basis for U values in Table 1
cispr
A.1 General
The following clauses outline the approach used to determine U for the various
cispr
measurements. The main uncertainty components for each measurement are identified and
an estimate of their magnitude provided. All assumptions made are documented in Clause A.5
and referenced as notes in the actual uncertainty estimate.
Definitions of measurement uncertainty terms, and information on the evaluation and
expression of the uncertainty of measurement are available in references [1] to [4] of the
bibliography.
A.2 Conducted disturbance measurements at a mains port
The measurand V is calculated as:
V V L L
r c amn
GV GV GV GV GM GZ
sw pa pr nf
Table A.1 Conducted disturbances from 9 kHz to 150 kHz
using a 50 :/50 PH + 5 : AMN
Input quantity Uncertainty of x
X u(x)c c u(x )
i i i i i i
Probability
dB dB dB
distribution
function
1) a
Receiver reading V ±0,1 k = 1 0,10 1 0,10
r
2)
Attenuation: AMN-receiver L ±0,1 k = 2 0,05 1 0,05
c
3)
AMN voltage division factor L k = 2 0,10 1 0,10
r0,2
amn
Receiver corrections:
4)
Sine wave voltage GV r1,0 k = 2 0,50 1 0,50
sw
5)
Pulse amplitude response GV r1,5 Rectangular 0,87 1 0,87
pa
5)
Pulse repetition rate response GV r1,5 Rectangular 0,87 1 0,87
pr
6)
Noise floor proximity 0,00 1 0,00
GV r0,0
nf
7)
Mismatch: AMN-receiver GM +0,7/–0,8 U-shaped 0,53 1 0,53
8)
AMN impedance +3,1/–3,6 Triangular 1,37 1 1,37
GZ
a
For numbered comments, see article A.5.
Hence: 2 u (V) = 3,97 dB
c
---------------------- Page: 17 ----------------------
SIST EN 55016-4-2:2005
CISPR 16-4-2 ” IEC:2003 – 23 –
Table A.2 Conducted disturbances from 150 kHz to 30 MHz
using a 50 :/50 PH AMN
Input quantity X Uncertainty of x u(x)c c u(x )
i i i i i i
Probability
dB dB dB
distribution
function
1) a
Receiver reading V ±0,1 k = 1 0,10 1 0,10
r
2)
Attenuation: AMN-receiver L ±0,1 k = 2 0,05 1 0,05
c
3)
AMN voltage division factor L r0,2 k = 2 0,10 1 0,10
amn
Receiver corrections:
4)
Sine wave voltage k = 2 0,50 1 0,50
GV r1,0
sw
5)
Pulse amplitude response GV r1,5 Rectangular 0,87 1 0,87
pa
5)
Pulse repetition rate response GV r1,5 Rectangular 0,87 1 0,87
pr
6)
Noise floor proximity GV r0,0 0,00 1 0,00
nf
7)
Mismatch: AMN-receiver GM +0,7/–0,8 U-shaped 0,53 1 0,53
8)
AMN impedance GZ +2,6/–2,7 Triangular 1,08 1 1,08
a
For numbered comments, see article A.5.
Hence: 2 u (V) = 3,60 dB
c
A.3 Disturbance power measurements
The measurand P is calculated as:
P V L L 10 log (50)
r c ac 10
GV GV GV GV GM GMD GE
sw pa pr nf
Table A.3 Disturbance power from 30 MHz to 300 MHz
Input quantity Uncertainty of x
X u(x)c c u(x )
i i i i i i
Probability
dB dB dB
distribution
...
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