Amendment 1 - Specification for radio disturbance and immunity measuring apparatus and methods - Part 4-2: Uncertainties, statistics and limit modelling - Measurement instrumentation uncertainty

Amendement 1 - 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 de l'instrumentation

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Published
Publication Date
13-Feb-2014
Current Stage
PPUB - Publication issued
Start Date
14-Feb-2014
Completion Date
14-Feb-2014
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CISPR 16-4-2:2011/AMD1:2014 - Amendment 1 - Specification for radio disturbance and immunity measuring apparatus and methods - Part 4-2: Uncertainties, statistics and limit modelling - Measurement instrumentation uncertainty
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CISPR 16-4-2
Edition 2.0 2014-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
COMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES
BASIC EMC PUBLICATION
PUBLICATION FONDAMENTALE EN CEM
AMENDMENT 1
AMENDEMENT 1
Specification for radio disturbance and immunity measuring apparatus and
methods –
Part 4-2: Uncertainties, statistics and limit modelling – Measurement
instrumentation uncertainty
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 de l’instrumentation
CISPR 16-4-2:2011-06/AMD1:2014-02(EN-FR)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
CISPR 16-4-2
Edition 2.0 2014-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
COMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES
BASIC EMC PUBLICATION
PUBLICATION FONDAMENTALE EN CEM
AMENDMENT 1
AMENDEMENT 1
Specification for radio disturbance and immunity measuring apparatus and
methods –
Part 4-2: Uncertainties, statistics and limit modelling – Measurement
instrumentation uncertainty
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 de l’instrumentation
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX E
ICS 33.100.10; 33.100.20 ISBN 978-2-8322-1382-7

Warning! Make sure that you obtained this publication from an authorized distributor.

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® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – CISPR 16-4-2 Amend.1  IEC:2014
FOREWORD
This amendment has been prepared by subcommittee A of CISPR: Radio-interference
measurements and statistical methods.
The text of this amendment is based on the following documents:
FDIS Report on voting
CISPR/A/1049/FDIS CISPR/A/1058/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.
_____________
3.3 Abbreviations
Add the following new abbreviation to the existing list:
CDNE coupling decoupling network for emission measurement
Table 1 – Values of U
cispr
Add, before the existing NOTE 1, the following new line:

Conducted disturbance at mains port using CDNE (30 MHz to 300 MHz) 3,8 dB B.7

Add, after the existing 5.5.3, the following new subclause:
5.6 Conducted disturbance measurements using a CDNE (see also B.7)
5.6.1 Measurand for measurements using a CDNE
Asymmetric (common-mode) disturbance voltage, in dB(µV), measured on the
connection lead of the EUT through a CDNE referred to reference ground
5.6.2 Symbols of input quantities specific to CDNE measurements
Voltage division factor (VDF) of the CDNE, in dB
CDNE
Correction for VDF frequency interpolation error, in dB
CDNE
Correction for the imperfect common mode impedance of the CDNE, in dB
CDNE
Correction for the effect of ambient disturbances, in dB
amb
Correction for the effect of imperfect grounding, in dB
grounding
---------------------- Page: 4 ----------------------
CISPR 16-4-2 Amend.1  IEC:2014 – 3 –
Correction for the effect of the environment, in dB
env

5.6.3 Input quantities to be considered for conducted disturbance measurements at a

mains port using a CDNE
– Receiver reading
– Cable attenuation between CDNE and receiver
– CDNE VDF
– CDNE VDF frequency interpolation
– CDNE impedance
– Receiver related input quantities
• Receiver sine wave voltage accuracy
• Receiver pulse amplitude response
• Receiver pulse repetition rate response
• Receiver noise floor proximity
– Mismatch effects between CDNE receiver port and receiver
– Effect of ambient disturbances
– Effect of the grounding
– Effect of the environment
A.1 General
Add, after the last paragraph of this subclause, the following new paragraph:

In the uncertainty budgets a normal distribution function is used, unless otherwise identified in

the tables.
A.2 Rationale for the estimates of input quantities common to all disturbance
measurements (“A” comments)

Replace the existing text of the item A2) by the following new text, keeping the original

NOTES 1, 2 and 3:

An estimate of the attenuation a of the connection between the receiver and the AMN, AAN,

CDNE, CP, CVP, VP, absorbing clamp or antenna is assumed to be available from a
calibration report, along with an expanded uncertainty and a coverage factor.
Add, after the existing B.6, the following new subclauses:
B.7 Uncertainty budget for conducted disturbance measurements at a mains
port using a CDNE
The measurand V is calculated using:
(B.6)
V =V +a +F + δZ + δV + δV + δV + δV + δF + δM + δD +
r c CDNE CDNE sw pa pr nf CDNE amb
δV + δV
grounding env
---------------------- Page: 5 ----------------------
– 4 – CISPR 16-4-2 Amend.1  IEC:2014
Table B.7 − Uncertainty budget for conducted disturbance measurements
from 30 MHz to 300 MHz
Uncertainty of x
c u(x )
i i
Probability
Input quantity X distribution
dB function dB
A1)
V k = 1
Receiver reading ± 0,1 0,10
A2)
Attenuation: CDNE-receiver a k = 2 0,05
± 0,1
B20)
CDNE VDF F k = 2 0,20
± 0,4
CDNE
B21)
CDNE impedance tolerances δZ Triangular 1,01
+2,69/–2,25
CDNE
Receiver corrections:
A3)
Sine wave voltage δV ± 1,0 0,50
sw k = 2
A4)
Rectangular 0,87
δV ± 1,5
Pulse amplitude response
A4)
Pulse repetition rate response δV ± 1,5 Rectangular 0,87
A5)
Noise floor proximity Rectangular 0,00
δV ± 0,0
A6)
CDNE VDF frequency interpolation Rectangular 0,06
δF ± 0,1
CDNE
A7)
Mismatch: CDNE-receiver δM U-shaped 0,14
+0,19/–0,20
B22)
Effect of ambient disturbances δD ± 0,0 − 0,00
amb
B23)
Grounding related factors δV ± 1,5 Triangular 0,61
groundin
B24)
Triangular 0,61
δV ± 1,5
Effect of the environment
env
a A1)
Superscripts (e.g. ) correspond to comments in A.2 and B.8.
All c = 1 (see A.1).

NOTE The influence of differential-mode emission from the EUT is negligible under the conditions specified in

...

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