SLOVENSKI SIST EN 55016-1-
2:2005/A1:2005
STANDARD
julij 2005
Specifikacija za merilne naprave in metode za merjenje radijskih motenj in
odpornosti – 1-2. del: Merilne naprave za merjenje radijskih motenj in
odpornosti – Pomožna oprema – Motnje po vodnikih - Dopolnilo A1 (CISPR 16-
1-2-2003/A1:2004)
Specification for radio disturbance and immunity measuring apparatus and
methods - Part 1-2: Radio disturbance and immunity measuring apparatus -
Ancillary equipment - Conducted disturbances (CISPR 16-1-2-2003/A1:2004)
ICS 17.220.20; 33.100.20 Referenčna številka
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 55016-1-2/A1
NORME EUROPÉENNE
EUROPÄISCHE NORM February 2005

ICS 33.100.10; 33.100.20
English version
Specification for radio disturbance
and immunity measuring apparatus and methods
Part 1-2: Radio disturbance and immunity measuring apparatus –
Ancillary equipment –
Conducted disturbances
(CISPR 16-1-2:2003/A1:2004)
Spécifications des méthodes Anforderungen an Geräte und Einrichtungen
et des appareils de mesure sowie Festlegung
des perturbations radioélectriques der Verfahren zur Messung der
et de l'immunité aux perturbations hochfrequenten Störaussendung
radioélectriques (Funkstörungen) und Störfestigkeit
Partie 1-2: Appareils de mesure Teil 1-2: Geräte und Einrichtungen
des perturbations radioélectriques zur Messung der hochfrequenten
et de l'immunité aux perturbations Störaussendung (Funkstörungen)
radioélectriques – und Störfestigkeit –
Matériels auxiliaires – Zusatz-/Hilfseinrichtungen –
Perturbations conduites Leitungsgeführte Störaussendung
(CISPR 16-1-2:2003/A1:2004) (CISPR 16-1-2:2003/A1:2004)

This amendment A1 modifies the European Standard EN 55016-1-2:2004; it was approved by CENELEC
on 2005-02-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this amendment 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 amendment 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

© 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 55016-1-2:2004/A1:2005 E

Foreword
The text of amendment 1:2004 to the International Standard CISPR 16-1-2:2003, prepared by
CISPR SC A, Radio-interference measurements and statistical methods, was submitted to the Unique
Acceptance Procedure and was approved by CENELEC as amendment A1 to EN 55016-1-2:2004 on
2005-02-01 without any modification.
The following dates were fixed:
– latest date by which the amendment has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2006-02-01
– latest date by which the national standards conflicting
with the amendment have to be withdrawn (dow) 2008-02-01
__________
Endorsement notice
The text of amendment 1:2004 to the International Standard CISPR 16-1-2:2003 was approved by
CENELEC as an amendment to the European Standard without any modification.
__________
INTERNATIONAL
CISPR
ELECTROTECHNICAL
16-1-2
COMMISSION
AMENDMENT 1
2004-04
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
Amendment 1
Specification for radio disturbance and immunity
measuring apparatus and methods –
Part 1-2:
Radio disturbance and immunity measuring
apparatus – Ancillary equipment –
Conducted disturbances
This English-language version is derived from the original
bilingual publication by leaving out all French-language
pages. Missing page numbers correspond to the French-
language pages.
 IEC 2004 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
L
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

CISPR 16-1-2 Amend. 1  IEC:2004 – 3 –
FOREWORD
This amendment has been prepared by CISPR subcommittee A: Radio-interference
measurements and statistical methods.
The text of this amendment is based on the following documents:
FDIS Report on voting
CIS/A/503/FDIS CIS/A/521/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 the base publication and its amendments will
remain unchanged until 2006. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
_____________
Page 31
5.2 Voltage probe
Add the title of new subclause 5.2.1 as follows:
5.2.1 High impedance voltage probe
Insert, immediately after the title of new subclause 5.2.1, the existing text of subclause 5.2.
Add the following new subclause:
5.2.2 Capacitive voltage probe
The asymmetrical disturbance voltages of cables can be measured without making direct
conductive contact with the source conductor and without modification of its circuit by the use of
a clamp-on capacitive coupling device. The usefulness of this method is self-evident; complex
wiring systems, electronic circuits, etc. may be measured without interruption of the normal
operation or configuration of the EUT or the need to cut the cable to insert a measuring device.
The capacitive voltage probe is constructed so that it may be conveniently clamped around the
conductor to be measured.
The capacitive voltage probe is used for measurements of conducted disturbances in the
frequency range 150 kHz to 30 MHz with an almost flat frequency response in the frequency
range of interest. The voltage division factor, which is defined as the ratio of the disturbance
voltage on the cable to the input voltage at the measuring receiver, depends on the type of cable.
This parameter should be calibrated over a specified frequency range for each cable type, using
the method described in Annex G.

CISPR 16-1-2 Amend. 1  IEC:2004 – 5 –
The capacitive voltage probe may need additional shielding to provide sufficient isolation from
the asymmetrical (common mode) signal around the cable (see "Influence of electric field" in
5.2.2.2). Annex G contains an example of the construction and a method of measurement for the
isolation.
This capacitive voltage probe can be used to measure the disturbances at telecommunication
ports. The minimum measurable level is typically up to 44 dB(μV).
5.2.2.1 Construction
The capacitive voltage probe shall be constructed so as to enable the measurement of the
voltage without disconnecting the cable under measurement. Figure 11 shows a circuit that is
used to make voltage measurements between a cable and a reference ground. The probe
consists of a capacitive coupling clamp which is connected to a trans-impedance amplifier. The
input resistance R of this amplifier shall be large enough compared to the reactance X to
p c
obtain a flat frequency response.
Capacitive coupling clamp
Cable
V
Gain of trans-impedance amplifier
R >> X
p c Measuring receiver
X = 1 jω()C + C
c p s
R
p
V
F = 20 log
a 10
C
C p
U s
U
 C + C + C
p s 1
 
= 20 log
 
C G
p
 
IEC 437/04
Key
G Gain of trans-impedance amplifier
p
C   Capacitance between the cable and the clamp
C Capacitance between probe and ground
s
C Capacitance of trans-impedance amplifier
p
R Resistance of trans-impedance amplifier
p
V   Disturbance voltage
U  Voltage at the input of the measuring receiver

Figure 11 – Circuit used to make voltage measurement between a cable
and a reference ground
CISPR 16-1-2 Amend. 1  IEC:2004 – 7 –
Annex G provides instructions for the typical construction and verification of the capacitive
voltage probe.
5.2.2.2 Requirements
Added shunt capacitance: Less than 10 pF between the grounding terminal of
capacitive voltage probe and the cable under test.
Frequency response:
Voltage division factor, F = 20 log |V/U| in dB (see Figure
a
11), is calibrated over a specified frequency range.
Pulse response: Maintain linearity for the pulse determined by the method in
Annexes B and C of CISPR 16-1-1 for band B.
Influence of electric field: The voltage indication is reduced by more than 20 dB when
(influence caused by electrostatic a cable is removed from the capacitive voltage probe. The
coupling with other cables near measurement method is described in Annex G.
the probe)
Capacitive voltage probe aperture
or opening: At least 30 mm
(aperture when the two coaxial
electrodes open at the slot (see
Figure G.1))
Page 33
Figure 6 – Circuit for RF voltage measurement on supply mains
Change the existing title of Figure 6 to read as follows:
Figure 6 – Circuit for RF voltage measurement on supply mains (see 5.2.1)
Page 121
Add, after Annex F, the new Annex G as follows:

CISPR 16-1-2 Amend. 1  IEC:2004 – 9 –
Annex G
(informative)
Construction and evaluation of capacitive voltage probe
(subclause 5.2.2)
G.0 Introduction
This annex provides an example of a method for the calibration of the capacitive voltage probe
(CVP). Other calibration methods can be used if their uncertainty is considered to be equivalent
to that of the method shown in this annex.
G.1 Physical and electrical considerations for capacitive voltage probe
Figure G.1 shows the configuration of a capacitive voltage probe. It is made up of two coaxial
electrodes, a grounding terminal, a cable fixture, and a trans-impedance amplifier. The outer
electrode is used as an electrostatic shield to reduce the measurement error caused by
electrostatic coupling from cables running alongside.
The equivalent circuit of the probe is shown in Figure G.2. When a voltage exists between the
cable and the ground, an induced voltage occurs between the inner electrode and the outer
electrode as a result of electrostatic induction. This voltage is detected by a high impedance
input amplifier and converted to low impedance by a trans-impedance amplifier. The output is
measured by a measuring receiver.
G.2 Determination of the frequency response of the voltage division factor
Figure G.3 shows the test set-up used to determine the frequency response of the capacitive
voltage probe. The probe is verified according to the following procedures.
a) Prepare the same type of cable which is used with the equipment under test (EUT).
NOTE If several types of cable are used with the probe, a representative variety of cable types shall be used in
the calibration and the spread of results determined. The voltage division factor (F ) can be estimated by using
a
equation (G.3), however, it is recommended to measure the F for each cable.
a
b) Place the calibration fixture on the reference ground plane, as shown in Figure G.3.
c) Connect both ends of the cable to the inner ports of the calibration fixture (port-1, port-2)
(see Figure G.3).
d) Place the probe in the calibration unit and adjust the position of the cable to pass through the
centre.
Caution: If the end of plates of the calibration fixture are too close to the ends of the voltage probe, the stray
capacitance is increased, which can adversely affect the calibration at higher frequencies. If the end plates of the
calibration fixture get too far from the ends of the voltage probe, a standing wave may be formed within the
calibration fixture at higher frequencies. These standing waves can adversely affect the calibration.
e) Connect the grounding port of the probe to the inner grounding port of the calibration fixture.
Connect the outer grounding port of the calibration fixture to the reference ground plane. The
grounding strip should have low inductance, be as short as possible and kept away from the
voltage probe aperture.
CISPR 16-1-2 Amend. 1  IEC:2004 – 11 –
f) Connect a signal generator, with an output impedance of 50 Ω, to the outer port of the port-1
through a 10 dB attenuator.
g) Connect a level meter, with an input impedance of 50 Ω, to the outer port of port-2 and
terminate the output port of the probe in 50 Ω. Measure the level V over a specified
frequency range.
h) Connect the level meter to the output port of the probe and terminate the outer port of the
port-2 by 50 Ω. Measure the level U over a specified frequency range.
i) Calculate the voltage division factor F = 20 log |V/U| in dB from the measured values.
a 10
G.3 Method of measurement to determine the influence of external electric fields
G.3.1 Influence of external electric field
The influence of the external electric field appears via electrostatic coupling with other cables
close to the probe. Figure G.4 shows the electrostatic coupling models and their equivalent
circuits. Both the common-mode voltage V on cable #2 and the voltage V on cable #1 appear at
x
the input terminal of the high impedance voltage probe through the capacitance C and C as
x
shown in Figure G.4 (a). An electrostatic shield shall be used to reduce the
...

EN 55016-1-2:2004/A1:2005

Specification for radio disturbance and immunity measuring apparatus and methods - Part 1-2: Radio disturbance and immunity measuring apparatus - Ancillary equipment - Conducted disturbances

Specification for radio disturbance and immunity measuring apparatus and methods - Part 1-2: Radio disturbance and immunity measuring apparatus - Ancillary equipment - Conducted disturbances

Specifikacija za merilne naprave in metode za merjenje radijskih motenj in odpornosti – 1-2. del: Merilne naprave za merjenje radijskih motenj in odpornosti – Pomožna oprema – Motnje po vodnikih - Dopolnilo A1 (CISPR 16-1-2-2003/A1:2004)

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Specification for radio disturbance and immunity measuring apparatus and methods - Part 1-2: Radio disturbance and immunity measuring apparatus - Ancillary equipment - Conducted disturbances

Specifikacija za merilne naprave in metode za merjenje radijskih motenj in odpornosti – 1-2. del: Merilne naprave za merjenje radijskih motenj in odpornosti – Pomožna oprema – Motnje po vodnikih - Dopolnilo A1 (CISPR 16-1-2-2003/A1:2004)

General Information

Relations

Buy Standard

Standards Content (Sample)

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.

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