CISPR 16-2-1:2014/AMD1:2017

CISPR 16-2-1 ®
Edition 3.0 2017-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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 2-1: Methods of measurement of disturbances and immunity – Conducted
disturbance measurements
Spécifications des méthodes et des appareils de mesure des perturbations
radioélectriques et de l'immunité aux perturbations radioélectriques –
Partie 2-1: Méthodes de mesure des perturbations et de l'immunité – Mesures
des perturbations conduites
CISPR 16-2-1:2014-02/AMD1:2017-06 (en-fr)

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CISPR 16-2-1 ®
Edition 1.0 2017-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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 2-1: Methods of measurement of disturbances and immunity – Conducted

disturbance measurements
Spécifications des méthodes et des appareils de mesure des perturbations

radioélectriques et de l'immunité aux perturbations radioélectriques –

Partie 2-1: Méthodes de mesure des perturbations et de l'immunité – Mesures

des perturbations conduites
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.100.10, 33.100.20 ISBN 978-2-8322-4393-0

– 2 – CISPR 16-2-1:2014/AMD1:2017
© IEC 2017
FOREWORD
This amendment has been prepared by subcommittee CISPR A: Radio-interference
measurements and statistical methods, of IEC technical committee CISPR: International
special committee on radio interference.
The text of this amendment is based on the following documents:
CDV Report on voting
CISPR/A/1168/CDV CISPR/A/1201/RVC

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 website 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.
IMPORTANT – The “colour inside” logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this publication using a colour printer.

_____________
1 Scope
Replace the existing first paragraph by the following new paragraph:
This part of CISPR 16 is designated a basic standard that specifies the methods of
measurement of disturbance phenomena in general in the frequency range 9 kHz to 18 GHz,
and especially of conducted disturbance phenomena in the frequency range 9 kHz to 30 MHz.
The CDNE extends the frequency range of conducted disturbance measurements to 300 MHz.
3.1 Terms and definitions
3.1.2
artificial network
AN
Replace the existing definition and note by the following new definition and new note:
network that provides a defined impedance to the EUT at radio frequencies, couples the
disturbance voltage to the measuring receiver, and decouples the test circuit from the mains
network or other power lines or from signal lines with associated equipment

© IEC 2017
Note 1 to entry: There are four basic types of this network: the V-network (V-AN), which couples the unsymmetric
voltages; the delta-network (Δ-AN), which couples symmetric (DM) and asymmetric (CM) voltages separately; the
Y-network (Y-AN); and the coaxial (screened cable) network, which couple asymmetric (CM) voltages.
3.1.3
artificial mains network
AMN
Replace the existing Note 1 to entry by the following new note:
Note 1 to entry: There are two basic types of this network: the V-network (V-AMN), which couples the unsymmetric
voltages; and the delta-network (Δ-AMN), which couples symmetric (DM) and asymmetric (CM) voltages
separately.
3.1.6
asymmetric voltage
Replace the existing definition and note by the following new definition and new note:
RF voltage appearing between the electrical mid-point of the individual terminals or leads in a
two- or multi-wire circuit and reference ground, sometimes called the CM voltage
Note 1 to entry: If, in case of a LV AC mains power port, V is the vector voltage between one of the mains
a
terminals and reference ground, and V is the vector voltage between the other mains terminal and reference
b
ground, the asymmetric voltage is half the vector sum of V and V , i.e. (V + V )/2.
a b a b
3.1.7
symmetric voltage
Replace the existing definition and note by the following new definition and new note:
RF voltage appearing between any pair of wires not comprising the wire at ground potential in
a two- or multi-wire circuit, such as a single-phase mains supply or a bundle of twisted pairs
in a communication cable, sometimes called the DM voltage
Note 1 to entry: In case of a LV AC mains power port, the symmetric voltage is the vector difference (V – V ).
a b
3.1.8
unsymmetric mode voltage
Replace the existing term, definition and notes by the following new term, definition and note:
3.1.8
unsymmetric voltage
RF voltage appearing between an individual terminal or lead in a two- or multi-wire circuit and
reference ground
Note 1 to entry: The unsymmetric voltage is the voltage measured by the use of an artificial mains V-network. It
denotes the amplitude of the vector voltage, V or V (mentioned in the notes to entry in 3.1.6 and 3.1.7).
a b
3.1.25
reference ground plane
RGP
Replace the existing definition and notes by the following new definition and new notes:
flat, conductive surface that is at the same electric potential as reference ground, which is
used as a common reference, and which contributes to a reproducible parasitic capacitance
with the surroundings of the EUT
Note 1 to entry: A reference ground plane is needed for the measurements of conducted disturbances, and serves
as reference for the measurement of unsymmetric and asymmetric disturbance voltages.
Note 2 to entry: This note applies to the French language only.
Note 3 to entry: In some regions, the term ‘reference earth’ is used in place of ‘reference ground’.

– 4 – CISPR 16-2-1:2014/AMD1:2017
© IEC 2017
3.2 Abbreviations
Add to the existing list the following new abbreviations:
DM Differential mode
Δ-AN Artificial Δ-network (‘Δ’ is pronounced ‘delta’)
GCPC Grid connected power convertor
LV Low voltage
RFI Radio frequency interference
UM Unsymmetric mode
V-AMN Artificial mains V-network
V-AN Artificial V-network
Y-AN Artificial Y-network
5.3 Connections to RF reference ground
Delete, in the existing title, the abbreviated term "RF".
Replace the second paragraph (the paragraph following NOTE 1) by the following new
paragraphs:
The measurement of unsymmetric (UM) or terminal voltages and asymmetric (CM) voltages
shall be referenced only to the reference ground. Ground loops (common impedance
coupling) shall be avoided. Ground loops will negatively affect repeatability of measurement
and can, e.g. be detected if grounded components of a test set-up are touch-sensitive. This
should also be observed for measuring apparatus (e.g. measuring receivers and connected
ancillary equipment, such as oscilloscopes, analyzers, recorders, etc.) fitted with a PE
conductor of safety class I equipment.
NOTE 3 A detrimental ground loop can be detected when the components of a test set-up are touch-sensitive, i.e.
the reading changes when the component is touched.
The measuring instrumentation shall be provided with RF isolation so that the AN has only
one RF connection to reference ground. This can be accomplished by using RF chokes and
isolation transformers, or by powering the measuring apparatus from batteries. Figure 1
shows an example of a recommended test set-up with three AMNs and PE chokes for the
avoidance of ground loops. In this figure, also the receiver RF connecting cable to the AMN
can act as a ground connection if the receiver is grounded. Therefore, either a PE choke is
needed at the receiver power input, or, if the receiver is outside a shielded room, a sheath
current suppressor is needed on the connecting cable. Each AMN is thus RF-grounded only
once.
5.4 Connections between the EUT and the artificial mains network
Delete, in the existing title, t
...