Specification for radio disturbance and immunity measuring apparatus and methods - Part 1-4: Radio disturbance and immunity measuring apparatus - Antennas and test sites for radiated disturbance measurements

This part of CISPR 16 specifies the characteristics and performance of equipment for the measurement of radiated disturbances in the frequency range 9 kHz to 18 GHz. Specifications for antennas and test sites are included.
NOTE In accordance with IEC Guide 107, CISPR 16-1-4 is a basic EMC publication for use by  product committees of the IEC. As stated in Guide 107, product committees are responsible for determining the applicability of the EMC standard. CISPR and its sub-committees are prepared to co-operate with product committees in the evaluation of the value of particular EMC tests for specific products.
The requirements of this publication apply at all frequencies and for all levels of radiated disturbances within the CISPR indicating range of the measuring equipment. Methods of measurement are covered in Part 2-3, and further information on radio disturbance is given in Part 3 of CISPR 16. Uncertainties, statistics and limit modelling are covered in Part 4 of CISPR 16.

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 - Antennes et emplacements d'essai pour les mesures des perturbations rayonnées

Specifikacija merilnih naprav in metod za merjenje radiofrekvenčnih motenj in odpornosti - 1-4. del: Merilne naprave za merjenje radiofrekvenčnih motenj in odpornosti - Antene in preskuševališča za meritve sevanih motenj - Dopolnilo A1

Ta del CISPR 16 opredeljuje značilnosti in zmogljivost opreme za merjenje radijskih motenj v frekvenčnem razponu od 9 kHz do 18 GHz. Vključene so specifikacije za antene in preskuševališča.
OPOMBA: V skladu z Vodilom IEC 107 je CISPR 16-1-4 osnovna objava EMC, ki jo uporabljajo odbori za proizvode IEC. Kot je navedeno v Vodilu 107, so odbori za proizvode odgovorni za določevanje uporabe tega standarda EMC. CISPR in njegovi pododbori so pripravljeni sodelovati z odbori za proizvode pri ocenjevanju vrednosti posameznih preskusov EMC za določene proizvode.
Zahteve te objave veljajo za vse frekvence in za vse ravni radijskih motenj v okviru CISPR z navedbo razpona merilne opreme. Metode merjenja so zajete v 2. in 3. delu, nadaljnje informacije o radijskih motnjah pa so podane v 3. delu CISPR 16. Nezanesljivost, statistika in modeliranje mejnih vrednosti so zajeti v 4. delu CISPR 16.

General Information

Status
Published
Publication Date
26-Dec-2012
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
21-Jan-2011
Due Date
28-Mar-2011
Completion Date
27-Dec-2012

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SLOVENSKI STANDARD
SIST EN 55016-1-4:2011/A1:2013
01-januar-2013
6SHFLILNDFLMDPHULOQLKQDSUDYLQPHWRG]DPHUMHQMHUDGLRIUHNYHQþQLKPRWHQMLQ
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Specification for radio disturbance and immunity measuring apparatus and methods -

Part 1-4: Radio disturbance and immunity measuring apparatus - Antennas and test sites

for radiated disturbance measurements
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 - Antennes et emplacements d'essai pour les mesures des

perturbations rayonnées
Ta slovenski standard je istoveten z: EN 55016-1-4:2010/A1:2012
ICS:
17.240 Merjenje sevanja Radiation measurements
33.100.20 Imunost Immunity
SIST EN 55016-1-4:2011/A1:2013 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 55016-1-4:2011/A1:2013
---------------------- Page: 2 ----------------------
SIST EN 55016-1-4:2011/A1:2013
EUROPEAN STANDARD
EN 55016-1-4/A1
NORME EUROPÉENNE
November 2012
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 -
Antennas and test sites for radiated disturbance measurements
(CISPR 16-1-4:2010/A1:2012)
Spécifications des méthodes et des Anforderungen an Geräte und
appareils de mesure des perturbations Einrichtungen sowie Festlegung
radioélectriques et de l'immunité der Verfahren zur Messung der
aux perturbations radioélectriques - hochfrequenten Störaussendung
Partie 1-4: Appareils de mesure des (Funkstörungen) und Störfestigkeit -
perturbations radioélectriques Teil 1-4: Geräte und Einrichtungen
et de l'immunité aux perturbations zur Messung der hochfrequenten
radioélectriques - Störaussendung (Funkstörungen)
Antennes et emplacements d'essai pour und Störfestigkeit -
les mesures des perturbations rayonnées Antennen und Messplätze für Messungen
(CISPR 16-1-4:2010/A1:2012) der gesterahlten Störaussendung
(CISPR 16-1-4:2010/A1:2012)

This amendment A1 modifies the European Standard EN 55016-1-4:2010; it was approved by CENELEC on

2012-08-15. 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 CEN-CENELEC Management Centre 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

CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,

the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,

Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,

Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 55016-1-4:2010/A1:2012 E
---------------------- Page: 3 ----------------------
SIST EN 55016-1-4:2011/A1:2013
EN 55016-1-4:2010/A1:2012 - 2 -
Foreword

The text of document CISPR/A/995/FDIS, future amendment 1 to edition 3 of CISPR 16-1-4, prepared

by SC A "Radio-interference measurements and statistical methods" of IEC/TC CISPR "International

special committee on radio interference" was submitted to the IEC-CENELEC parallel vote and

approved by CENELEC as EN 55016-1-4:2010/A1:2012.
The following dates are fixed:
(dop) 2013-05-16
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2015-08-15
standards conflicting with the
document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such

patent rights.
Endorsement notice

The text of the International Standard CISPR 16-1-4:2010/A1:2012 was approved by CENELEC as a

European Standard without any modification.
---------------------- Page: 4 ----------------------
SIST EN 55016-1-4:2011/A1:2013
- 3 - EN 55016-1-4:2010/A1:2012
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

In Annex ZA of EN 55016-1-4:2010, Delete the existing date and delete the two existing

amendments from CISPR/TR 16-3:
Publication Year Title EN/HD Year
CISPR/TR 16-3 - Specification for radio disturbance and - -
immunity measuring apparatus
and methods -
Part 3: CISPR technical reports
---------------------- Page: 5 ----------------------
SIST EN 55016-1-4:2011/A1:2013
---------------------- Page: 6 ----------------------
SIST EN 55016-1-4:2011/A1:2013
CISPR 16-1-4
Edition 3.0 2012-07
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 1-4: Radio disturbance and immunity measuring apparatus – Antennas and test

sites for radiated disturbance measurements
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 – Antennes et emplacements d’essai pour les mesures

des perturbations rayonnées
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX X
ICS 33.100.10; 33.100.20 ISBN 978-2-83220-150-3

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

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 7 ----------------------
SIST EN 55016-1-4:2011/A1:2013
– 2 – CISPR 16-1-4 Amend.1 © IEC:2012
FOREWORD

This amendment has been prepared by subcommittee 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:
FDIS Report on voting
CISPR/A/995/FDIS CISPR/A/1005/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 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.
_____________
---------------------- Page: 8 ----------------------
SIST EN 55016-1-4:2011/A1:2013
CISPR 16-1-4 Amend.1 © IEC:2012 – 3 –
INTRODUCTION
(to Amendment 1)

This amendment introduces the Reference Site Method (RSM). In addition to introducing new

content, Clause 5 is significantly restructured. To aid the reader in navigating this

amendment, the following table provides a comparison of subclauses in the existing

Edition 3.0 with those in this amendment. This introduction will be removed before the

subsequent edition is published.
Comparison of Clause 5 between original Edition 3.0 and Amendment 1
Original Edition 3.0 Amendment 1

5 Test sites for the measurement of radio 5 Test sites for the measurement of radio

disturbance field strength for the frequency disturbance field strength for the frequency

range of 30 MHz to 1 000 MHz range of 30 MHz to 1000 MHz
5.1 General 5.1 General
5.2 OATS 5.2 OATS
5.2.1 General 5.2.1 General
5.2.2 Weather protection enclosure 5.2.2 Weather protection enclosure
5.2.3 Obstruction-free area 5.2.3 Obstruction-free area

5.2.4 Ambient radio frequency environment of a test 5.2.4 Ambient radio frequency environment of a

site test site
5.2.5 Ground plane 5.2.5 Ground plane
5.2.6 OATS validation procedure

5.3 Test site suitability for other ground-plane test 5.3 Suitability of other test sites

sites
5.3.1 General 5.3.1 Other ground-plane test sites

5.3.2 Normalized site attenuation for alternative test 5.3.2 Test sites without ground plane (FAR)

sites
5.3.3 Site attenuation
5.3.4 Conducting ground plane
5.4 Test site suitability without ground plane 5.4 Test site validation
5.4.1 Measurement considerations for free space 5.4.1 General
test sites, as realized by fully-absorber-lined
shielded enclosures
5.4.2 Site performance 5.4.2 Overview of test site validations
5.4.3 Site validation criteria 5.4.3 Principles and values of the NSA method for
OATS and SAC
5.4.4 Reference site method for OATS and SAC
5.4.5 Validation of an OATS by the NSA method
5.4.6 Validation of a weather-protection-enclosed
OATS or a SAC
5.4.7 Site validation for FARs

5.5 Evaluation of set-up table and antenna tower 5.5 Evaluation of set-up table and antenna tower

5.5.1 General 5.5.1 General

5.5.2 Evaluation procedure for set-up table 5.5.2 Evaluation procedure for set-up table

influences influences
---------------------- Page: 9 ----------------------
SIST EN 55016-1-4:2011/A1:2013
– 4 – CISPR 16-1-4 Amend.1 © IEC:2012
2 Normative references

Remove the existing date and remove the two existing amendment references from the

existing reference to CISPR/TR 16-3.
3.1.12
quasi-free space test-site
Replace the existing term by the new term “quasi free-space test site”.
3.1.15
semi-anechoic chamber
SAC
Replace the existing definition of this term by the following new definition:

shielded enclosure in which all surfaces except the metal floor are covered with material that

absorbs electromagnetic energy (i.e. RF absorber) in the frequency range of interest

3.1.19
test volume
Replace, in the existing definition of this term, “the FAR” by “a FAR”.

Replace, in the existing Note of this term, “quasi-free space condition” by “quasi free-space

condition”, and “the FAR” by “a FAR”.

Add, after the existing definition 3.1.21, the following new terms and definitions 3.1.22, 3.1.23,

3.1.24, 3.1.25, 3.1.26 and 3.1.27:
3.1.22
antenna factor

ratio of the electric field strength of an incident plane wave to the voltage induced across a

specified load (typically 50 Ω) connected to the antenna

NOTE 1 F is affected by the load impedance connected to the antenna radiating elements, and is frequency

dependent. For a biconical antenna this impedance could be up to 200 Ω. For antennas with no balun the

impedance is equal to the load impedance, typically 50 Ω.

NOTE 2 Usually, the AF is defined for the plane wave incident from the direction corresponding with the maximum

gain of the antenna and at a specified point of the antenna.

NOTE 3 The AF has the physical dimension of inverse metres (m ) and measured data are normally expressed

in dB(m ). In radiated emission measurements, if F is known, the strength of an incident field, E, can be estimated

from a reading, V, of a measuring receiver connected to the antenna as follows:
E = V + F
where E is in dB(µV/m), V is in dB(µV) and F is in dB(m ).
3.1.23
antenna factor, free-space
a fs
AF of an antenna located in a free-space environment

NOTE F is a measurand for uncertainty calculation for antenna calibration. For NSA measurements F is an

a fs a fs
input quantity for uncertainty calculation.
---------------------- Page: 10 ----------------------
SIST EN 55016-1-4:2011/A1:2013
CISPR 16-1-4 Amend.1 © IEC:2012 – 5 –
3.1.24
antenna pair reference site attenuation
APR

set of site attenuation measurement results for both vertical and horizontal polarizations using

a pair of antennas separated by a defined distance at an ideal open-area test site, with one

antenna at a specified fixed height above the ground plane, and the other antenna scanned

over a specified height range in which the minimum insertion loss is recorded
NOTE 1 A is a measurand for uncertainty calculation.
APR

NOTE 2 A measurements are used for comparison to corresponding site attenuation measurements of a

APR
COMTS to evaluate the performance of the COMTS.
3.1.25
antenna reference point

midpoint of an antenna from which the distance to the EUT or second antenna is measured

NOTE The antenna reference point is either defined by the manufacturer using a marker on LPDA antennas or by

the calibration laboratory.
3.1.26
ideal open-area test site

open-area test site having a perfectly flat, perfectly conducting ground plane of infinite area,

and with no reflecting objects except the ground plane

NOTE An ideal OATS is a theoretical construct that is used in the definition of the measurand A and in the

APR

calculation of the theoretical normalized site attenuation A for ground plane sites.

3.1.27
reference test site
REFTS

open-area test site with metallic ground plane and tightly specified site attenuation

performance in horizontal and vertical electric field polarizations
3.2 Abbreviations

Add, before the existing abbreviation EUT of this subclause, the following new sentence:

The following are abbreviations used in this standard that are not already given in 3.1.

Add the following new abbreviation to the existing list:
RSM Reference site method
Delete, in the existing list, the entire abbreviation SAC.
4.5.3 Antenna characteristics

Replace, in item c) 2) of the list, in the paragraph after the variable list of Equation (4), the

existing text “corrections or as” by “a correction with associated”.
Delete the existing NOTE 3 in the existing item c) 3) of the list.

Replace, in the list of quantities below Equation (4), existing quantity "h " by "h " and replace

1 2
existing quantity "h " by "h "
2 1 .
---------------------- Page: 11 ----------------------
SIST EN 55016-1-4:2011/A1:2013
– 6 – CISPR 16-1-4 Amend.1 © IEC:2012
Replace the existing Figure 1 by the following new figure:
IEC 1072/12

Figure 1 – 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

4.5.4.2 Balun DM/CM conversion check

Replace, in the existing Note 2, “room” by “FAR”, and “±4 dB criterion” by “± 4 dB site

validation criterion”.

Replace, in the existing Note 3, “fully-anechoic room” by “FAR”, and “NSA (normalized site

attenuation)” by “site validation”.
4.5.5 Cross-polar response of antenna

Replace, in the third paragraph of this subclause, “quasi-free space conditions” by “quasi

free-space conditions”, and “high-quality anechoic chamber” by “high-quality fully anechoic

room”.
5.1 General
Replace the existing text of this subclause by the following new text:

An environment is required that assures valid, repeatable measurement results of disturbance

field strength from an EUT. For an EUT that can only be tested at its place of use, other

provisions shall be utilized (i.e. see details on in-situ measurements in CISPR 16-2-3).

5.2.1 General
Replace the existing text of this subclause by the following new text:

An OATS is an area characterized by cleared level terrain and the presence of a ground

plane. To meet the validation requirements of this standard, a metallic ground plane is

recommended. Such a test site shall be free of buildings, electric lines, fences, trees, etc. and

free from underground cables, pipelines, etc., except as required to supply and operate the

EUT. Refer to Annex D for specific construction recommendations of an OATS for disturbance

field-strength measurements in the range of 30 MHz to 1 000 MHz. The site validation

---------------------- Page: 12 ----------------------
SIST EN 55016-1-4:2011/A1:2013
CISPR 16-1-4 Amend.1 © IEC:2012 – 7 –

procedures for an OATS are given in 5.4.4 and 5.4.5. Annex F explains the basis for the

acceptability criterion.
5.2.3 Obstruction-free area
Replace the third paragraph of this subclause by the following new paragraph:

For this ellipse, the length of the path taken by the undesired indirect ray reflected from any

object on the perimeter is twice the length of the path taken by the direct ray between the foci.

If a large EUT is installed on the turntable, the obstruction-free area shall be expanded so that

the obstruction clearance distances exist from the perimeter of the EUT.

Replace, in the last sentence of the fourth paragraph of this subclause, the existing words

“separation distance” by “measurement distance”.
Replace the existing Figure 2 by the following new figure:
Major axis = 2d
Minor axis = d 3
d/2
d d/2
Antenna Test sample
Boundary of area
defined by an ellipse
IEC 1073/12
Figure 2 – Obstruction-free area of a test site with a turntable (see 5.2.3)
---------------------- Page: 13 ----------------------
SIST EN 55016-1-4:2011/A1:2013
– 8 – CISPR 16-1-4 Amend.1 © IEC:2012
Replace the existing Figure 3 by the following new figure:
≥ 1,5 d
Test antenna
location
Boundary of EUT
Boundary of obstruction-free
area
Boundary of area
IEC 1074/12
Figure 3 – Obstruction-free area with stationary EUT (see 5.2.3)
5.2.4 Ambient radio frequency environment of a test site

Replace the first paragraph of this subclause before the list by the following new paragraph:

The ambient radio frequency levels at an OATS shall be sufficiently low compared to the

levels of measurements to be performed. The quality of the site in this regard may be

evaluated under four categories, listed below in order of merit:
Replace the existing note of this subclause by the following new note:

NOTE A measured ambient level of 20 dB or more below the emission limit is considered optimum.

5.2.5 Ground plane
Replace the existing text in this subclause by the following new text:

The OATS ground plane can be at earth level or elevated on a suitably sized platform or

horizontal rooftop site. A metal ground plane is preferred, but for certain equipment and

applications, product publications may recommend other site types. Adequacy of the metal

ground plane will be dependent on whether the test site meets the site validation

requirements of 5.4. If metallic material is not used, caution is required to select a site that

does not change its reflective characteristics with time, weather conditions, or effects due to

buried metallic material such as pipes, conduits, and non-homogeneous soil. Such sites

generally give different SA characteristics compared to those with metallic surfaces.

5.2.6 OATS validation procedure

Delete this existing subclause, as well as the existing subclauses 5.2.6.1 to 5.2.6.4.

---------------------- Page: 14 ----------------------
SIST EN 55016-1-4:2011/A1:2013
CISPR 16-1-4 Amend.1 © IEC:2012 – 9 –
5.3 Test site suitability for other ground-plane test sites
Replace the existing title of this subclause by the following new title:
5.3 Suitability of other test sites
5.3.1 General
Replace the existing title of this subclause by the following new title:
5.3.1 Other ground-plane test sites

Replace the existing text of this subclause by the following new text and new note:

There are many different test sites and facilities that have been constructed and used to make

radiated emission measurements. Most are protected from the weather and the adverse

effects of the radio frequency ambient. In a SAC, all walls and the ceiling are equipped with

appropriate absorbing material. The floor consists of a metallic ground plane to emulate an

OATS. A SAC isolates the receiving antenna from the RF ambient environment, and permits

EUT testing independent of weather conditions.

Whenever construction material encloses a ground-plane test site, it is possible that the

results of a validation measurement at a single location, as specified in 5.4.5, are not

adequate to show acceptability of such an alternative site.

To evaluate suitability of an alternative ground-plane test site, the procedure of 5.4.6 shall be

used, which is based on making multiple validation measurements throughout a volume

occupied by the EUT. These validation measurement results shall all be within a tolerance of

± 4 dB for a site to be judged suitable as an equivalent to an OATS.
NOTE SACs typically meet the site quality categories listed in 5.2.4.
5.3.2 Normalized site attenuation for alternative test sites
Replace the existing title of this subclause by the following new title:
5.3.2 Test sites without ground plane (FAR)

Replace the existing text of this subclause by the following new text and new note:

A fully-absorber-lined shielded enclosure, also known as a fully-anechoic room (FAR), can be

used for radiated emission measurements. When a FAR site is used, appropriate radiated

emission limits shall be defined in relevant standards (generic, product or product family

standards). Compliance of an EUT with the requirements for the protection of radio-services

(limits) shall be evaluated at FAR sites using similar methods as for tests done at an OATS.

A FAR is intended to simulate a free-space environment such that only the direct ray from the

transmitting antenna or EUT reaches the receiving antenna. All indirect and reflected waves

shall be minimized by appropriate placement of absorbing material on all walls, ceiling and

floor of a FAR. Like a SAC, a FAR isolates the receiving antenna from the RF ambient

environment, and permits EUT testing independent of weather conditions.
NOTE FARs typically meet the site quality categories listed in 5.2.4.
5.3.3 Site attenuation
Delete this existing subclause and its title.
---------------------- Page: 15 ----------------------
SIST EN 55016-1-4:2011/A1:2013
– 10 – CISPR 16-1-4 Amend.1 © IEC:2012
5.3.4 Conducting ground plane
Delete this existing subclause and its title.
5.4 Test site suitability without ground plane
Replace the existing title of this subclause by the following new title:
5.4 Test site validation

5.4.1 Measurement considerations for free space test sites, as realized by fully-

absorber-lined shielded enclosures
Replace the existing title of this subclause by the following new title:
5.4.1 General

Replace the existing text of this subclause by the following new text and the following new

Table 7:
Three methods for site validation are defined in this standard:
• NSA method with tuned dipoles;
• NSA method with broadband antennas;
• Reference site method (RSM) with broadband antennas.

Validations for test sites with a ground plane (i.e. OATS and SAC) are introduced in 5.4.2 and

5.4.3, followed by detailed procedures for the RSM in 5.4.4 and for the NSA method in 5.4.5.

Validation of a SAC and a weather-protection enclosed OATS requires additional
measurements as described in 5.4.6.

Table 7 summarizes the site validation methods applicable for these specific test site types.

As shown in this table, two or three site validation methods are described for each of these

test site types. These methods are deemed to be equivalent for the purposes of this standard;

meaning compliance with the validation criterion can be evaluated using only one method.

Furthermore, no one of these documented methods is defined as the reference method.

Table 7 – Site validation methods applicable
for OATS, OATS-based, SAC and FAR site types
Applicability of site validation methods
Test site type Tuned dipoles Broadband antennas Broadband antennas
NSA NSA RSM
OATS Yes Yes Yes
OATS with weather No Yes Yes
protection
SAC No Yes Yes
FAR No Yes Yes
5.4.2 Site performance
Replace the existing title of this subclause by the following new title:
5.4.2 Overview of test site validations

Replace the existing text of this subclause, including Subclauses 5.4.2.1 to 5.4.2.3.4, by the

following new text:
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SIST EN 55016-1-4:2011/A1:2013
CISPR 16-1-4 Amend.1 © IEC:2012 – 11 –

The validation of a test site is performed using two co-polarized antennas. The validation shall

be performed separately for both horizontal and vertical polarizations.
SA is obtained from the difference of:
• the source voltage level, V , applied to a transmitting antenna;

• the maximum received voltage level, V , measured on the terminals of a receiving

antenna during a specified antenna height scan.
The voltage measurements are performed in a 50 Ω system.

The measured SA of an OATS (as in 5.2) and other ground-plane test sites (as in 5.3.1) is

compared to the SA characteristics obtained at an ideal OATS – this is the definition of the

measurand for test site validations. The result of this comparison is the SA deviation, ∆A ,

in dB; see Equations (26) and (27). The site is considered suitable when the SA deviation

results are within a tolerance of ± 4 dB.

If the ± 4 dB tolerance is exceeded, the test site configuration shall be investigated as

described in 5.4.5.3.
NOTE The basis for the 4 dB site acceptability criterion is given in Annex F.

Additionally, SA deviations shall not be used to correct field-strength measurement data for

an EUT. The procedures of 5.4 shall be used only for test site validations.
5.4.3 Site validation criteria
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5.4.3 Principles and values of the NSA method for OATS and SAC

Replace the existing text of this subclause by the following new text, the following new

Tables 8, 9, 10 and 11, and the following new Figures 29 and 30:

NSA values calculated at specific frequencies are provided in Tables 8 and 9 for tuned dipole

antennas, and Table 10 for broadband antennas. The quantities d, h , h , f and A , which

1 2 M N
are used in these tables, are identified at the end of Table 8.

NOTE 1 NSA values for frequencies other than shown in the Tables 8, 9, and 10 can be obtained using linear

interpolation between the tabulated values.

NOTE 2 The spacing d between the log-periodic dipole array antenna pairs is measured from the projection on the

ground plane of the mid-point of the longitudinal axis of each antenna.

NOTE 3 The spacing d between biconical antennas, is measured from the element centre-line axes at the

feedpoint.

For measurements in each polarization, the NSA method requires two different measurements

of the received voltage, V ; Figures 29 and 30 illustrate the set-ups for these measurements.

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SIST EN 55016-1-4:2011/A1:2013
– 12 – CISPR 16-1-4 Amend.1 © IEC:2012
Table 8 – Theoretical normalized site attenuation, A –
recommended geometries for tuned half-wave dipoles, with horizontal polarization
Polarization Horizontal Horizontal Horizontal Horizontal
d 3 m 10 m 30 m 30 m
h 2 m 2 m 2 m 2 m
h 1 m to 4 m 1 m to 4 m 1 m to 4 m 2 m to 6 m
f A
MHz dB(m )
30 11,0 24,1 41,7 38,4
35 8,8 21,6 39,1 35,8
40 7,0 19,4 36,8 33,5
45 5,5 17,5 34,7 31,5
50 4,2 15,9 32,9 29,7
60 2,2 13,1 29,8 26,7
70 0,6 10,9 27,2 24,1
80 –0,7 9,2 24,9 21,9
90 –1,8 7,8 23,0 20,1
100 –2,8 6,7 21,2 18,4
120 –4,4 5,0 18,2 15,7
140 –5,8 3,5 15,8 13,6
160 –6,7 2,3 13,8 11,9
180 –7,2 1,2 12,0 10,6
200 –8,4 0,3 10,6 9,7
250 –10,6 –1,7 7,8 7,7
300 –12,3 –3,3 6,1 6,1
400 –14,9 –5,8 3,5 3,5
500 –16,7 –7,6 1,6 1,6
600 –18,3 –9,3 0 0
700 –19,7 –10,6 –1,4 –1,3
800 –20,8 –11,8 –2,5 –2,4
900 –21,8 –12,9 –3,5 –3,5
1 000 –22,7 –13,8 –4,5 –4,4

is the horizontal separation between the projection of the transmit and receive antennas on the ground

plane;
is the height of the centre of the transmit antenna above the ground plane;

is the range of heights of the centre of the receive antenna above the ground plane, in m. The maximum

received signal in this height scan range is used for NSA results;
is the frequency;
...

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