EN 55016-1-4:2007/A1:2008

SLOVENSKI STANDARD
01-junij-2008
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Specification for radio disturbance and immunity measuring apparatus and methods -
Part 1-4: Radio disturbance and immunity measuring apparatus - Ancillary equipment -
Radiated disturbances
Anforderungen an Geräte und Einrichtungen sowie Festlegung der Verfahren zur
Messung der hochfrequenten Störaussendung (Funkstörungen) und Störfestigkeit - Teil
1-4: Geräte und Einrichtungen zur Messung der hochfrequenten Störaussendung
(Funkstörungen) und Störfestigkeit - Zusatz-/Hilfseinrichtungen - Gestrahlte
Störaussendung
Spécifications des méthodes et des appareils de mesure des perturbations
radioélectriques et de l'immunité aux perturbations radioélectriques - Partie 1-4:
Appareils de mesure des perturbations radioélectriques et de l'immunité aux
perturbations radioélectriques - Matériels auxiliaires - Perturbations rayonnées
Ta slovenski standard je istoveten z: EN 55016-1-4:2007/A1:2008
ICS:
17.240 Merjenje sevanja Radiation measurements
33.100.20 Imunost Immunity
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 55016-1-4/A1
NORME EUROPÉENNE
February 2008
EUROPÄISCHE NORM
ICS 33.100.10; 33.100.20
English version
Specification for radio disturbance
and immunity measuring apparatus and methods -
Part 1-4: Radio disturbance and immunity measuring apparatus -
Ancillary equipment -
Radiated disturbances
(CISPR 16-1-4:2007/A1:2007)
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 1-4: Appareils de mesure Teil 1-4: 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 rayonnées Gestrahlte Störaussendung
(CISPR 16-1-4:2007/A1:2007) (CISPR 16-1-4:2007/A1:2007)

This amendment A1 modifies the European Standard EN 55016-1-4:2007; it was approved by CENELEC on
2008-02-01. 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, 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

© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 55016-1-4:2007/A1:2008 E

Foreword
The text of document CISPR/A/750/FDIS, future amendment 1 to CISPR 16-1-4:2007, 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 amendment A1 to EN 55016-1-4:2007
on 2008-02-01.
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) 2008-11-01
– latest date by which the national standards conflicting
with the amendment have to be withdrawn (dow) 2011-02-01
__________
Endorsement notice
The text of amendment 1:2007 to the International Standard CISPR 16-1-4:2007 was approved by
CENELEC as an amendment to the European Standard without any modification.
__________
CISPR 16-1-4
Edition 2.0 2007-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
COMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES
AMENDMENT 1
AMENDEMENT 1
Specification for radio disturbance and immunity measuring apparatus and
methods –
Part 1-4: Radio disturbance and immunity measuring apparatus – Ancillary
equipment – Radiated disturbances

Spécifications des méthodes et des appareils de mesure des perturbations
radioélectriques et de l’immunité aux perturbations radioélectriques –
Partie 1-4: Appareils de mesure des perturbations radioélectriques et de
l’immunité aux perturbations radioélectriques – Matériels auxiliaires –
Perturbations rayonnées
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
S
CODE PRIX
ICS 33.100.10; 33.100.20 ISBN 2-8318-9312-7

– 2 – CISPR 16-1-4 Amend. 1 © IEC:2007
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/750/FDIS CISPR/A/760/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 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.
_____________
INTRODUCTION
In this amendment, the use of a balanced dipole antenna (the CISPR tuned dipole) as a
physical reference for radiated emission measurements in the frequency range between
30 MHz and 300 MHz is deleted. It is replaced by the requirement that in this frequency range
the quantity to be measured is the electric field strength that can be determined using
different types of antennas, provided that the antenna factor and the associated uncertainty
are known.
This fundamental change of measurand in the frequency range between 30 MHz and 300 MHz
was subject to thorough investigations and discussion within CISPR A, and brings it into line
with the measurand that already applies in the rest of the frequency range 9 kHz to 1 GHz,
and indeed above 1 GHz. The decision for this change has been supported by the results of a
questionnaire. More details on the rationale for the decision to introduce the ‘electric field’
measurand instead of the CISPR reference dipoles can be found in the CISPR Maintenance
Cycle Report CISPR/A/541/MCR.
CISPR/A/541/MCR explains that the need for a CISPR reference dipole no longer exists, due
to improvements in the calibration of antennas used for EMC compliance testing and the
increased implementation of quality systems in test and calibration laboratories in accordance
with ISO 17025. Moreover, Clause 4 of CISPR 16-1-4 covers the frequency range 9 kHz to
1 GHz, yet a reference antenna is only specified in the range 30 MHz to 300 MHz, which
seems to make this frequency range an exception to the general rule.
In other words, most measurements of physical quantities are made with an instrument that is
traceable to national standards. There is no need for measurement of electric field strength in
the frequency range 30 MHz to 300 MHz to deviate from this, especially when application of
such a physical reference antenna may give a greater uncertainty to the intended measurand
than a regular calibrated broadband antenna. Moreover, these days, the CISPR reference
dipole is rarely used in practice because it is impractical from a operational point of view (time
consuming). The new measurand is the field strength as defined by the limit level in dBμV/m

CISPR 16-1-4 Amend. 1 © IEC:2007 – 3 –
and as required by the method of measurement. If various operators follow the same
measurement method, involving calibrated antennas, a high degree of reproducibility is
ensured.
A consequence of using the tuned dipole antenna as a reference is that the antenna
uncertainties in CISPR 16-4-2 require the field strength measured by a broadband antenna to
be referred to the field strength that would have been measured had a tuned dipole been
used. The ramifications would be dependent on the difference in radiation patterns and
mutual coupling of a dipole compared to a broadband antenna (including height dependence
of antenna factor). This practice can actually result in larger EMC measurement uncertainties
than if the field strength were derived from the traceably calibrated broadband antenna. The
relating of the behaviour of the commonly used broadband antenna to the extremely rarely
used tuned dipole in the notes to the uncertainty budget in CISPR 16-4-2, requires specialist
knowledge to understand.
Page 3
CONTENTS
Add, on page 5, to the list of tables the titles of the new figures as follows:
Figure 20 – Schematic of radiation from EUT reaching an LPDA antenna directly and via
ground reflections on a 3 m site, showing the half beamwidth, ϕ, at the reflected ray
Figure 21 – Definition of the reference planes inside the test jig
Figure 22 – Example of a 50 Ω adaptor construction in the vertical flange of the jig
Figure 23 – Example of a matching adaptor with balun or transformer
Figure 24 – Example of a matching adaptor with resistive matching network
Figure 25 – The four configurations for the TRL calibration

Page 15
3 Terms and definitions
3.5
antenna
Replace the existing Note 2 by the following new note:
NOTE 2 This term covers various devices such as the wire antenna, free-space-resonant dipole and hybrid
antenna.
3.8
site attenuation
Replace, on page 17, the existing text with the following:
Site attenuation is defined as the minimum site insertion loss measured between two
polarization-matched antennas located on a test site when one antenna is moved vertically
over a specified height range and the other is set at a fixed height.

– 4 – CISPR 16-1-4 Amend. 1 © IEC:2007
3.9
test antenna
Delete the existing definition 3.9, and replace it with the following new definition of site
insertion loss:
3.9
site insertion loss
the loss between a pair of antennas placed at specified positions on a test site, when a direct
electrical connection between the generator output and receiver input is replaced by
transmitting and receiving antennas placed at the specified positions
3.12
quasi-free space test-site
Replace the existing wording of this definition with the following:
facility for radiated emission measurements, or antenna calibration, that is intended to
achieve free-space conditions. Unwanted reflections from the surroundings are kept to a
minimum in order to satisfy the site acceptance criterion applicable to the radiated emission
measurement or antenna calibration procedure being considered
Add, after definition 3.13, the following new definitions:
3.14
cross-polar response
measure of the rejection by the antenna of the cross-polarised field, when the antenna is
rotated in a uniform electromagnetic field
3.15
hybrid antenna
conventional wire-element log-periodic dipole array (LPDA) antenna with boom lengthened at
the open-circuit end to add one broadband dipole (e.g., biconical or bow-tie), such that the
infinite balun (boom) of the LPDA serves as a voltage source for the broadband dipole.
Typically a common-mode choke is used at this end of the boom to minimize parasitic
(unintended) RF currents on the outer conductor of the coaxial cable flowing into the receiver
3.16
low uncertainty antenna
good quality robust biconical or LPDA antenna, whose antenna factor is reproducible to better
than ±0,5 dB, used for the measurement of E-field strength at a defined point in space
NOTE It is further described in A.2.2.
3.17
semi-anechoic chamber
SAC
shielded enclosure, in which five of the six internal surfaces are lined with radio-frequency-
energy absorbing material (i.e., RF absorber), which absorbs electromagnetic energy in the
frequency range of interest, and the bottom horizontal surface is a conducting ground plane
for use with OATS test set-ups
3.18
common mode absorption device
CMAD
a device that may be applied on cables leaving the test volume in radiated emission
measurements to reduce the compliance uncertainty

CISPR 16-1-4 Amend. 1 © IEC:2007 – 5 –
3.19
insertion loss
the loss arising from the insertion of a device into a transmission line, expressed as the ratio
of voltages immediately before and after the point of insertion of a device under test, before
and after the insertion. It is equal to the inverse of the transmission S-parameter, |1/S |
3.20
reflection coefficient
the ratio of a common quantity to both the reflected and incident travelling waves. Hence, the
voltage reflection coefficient is defined as the ratio of the complex voltage of the reflected
wave to the complex voltage of the incident wave. The voltage reflection coefficient is equal to
the scattering parameter S
3.21
short-open-load-through (SOLT) or through-open-short-match (TOSM) calibration
method
calibration method for a vector network analyser using three known impedance standards –
short, open, and match/load, and a single transmission standard – through. The SOLT method
is widely used, and the necessary calibration kits with 50 Ω characteristic
...