EN 50083-2:2001

SLOVENSKI STANDARD
01-marec-2003
1DGRPHãþD
SIST EN 50083-2:1999
SIST EN 50083-2:1999/A1:1999
Cable networks for television signals, sound signals and interactive services -
Part 2: Electromagnetic compatibility for equipment
Cable networks for television signals, sound signals and interactive services -- Part 2:
Electromagnetic compatibility for equipment
Kabelnetze für Fernsehsignale, Tonsignale und interaktive Dienste -- Teil 2:
Elektromagnetische Verträglichkeit von Geräten
Réseaux de distribution par câbles pour signaux de télévision, signaux de radiodiffusion
sonore et services interactifs -- Partie 2: Compatibilité électromagnétique pour les
matériels
Ta slovenski standard je istoveten z: EN 50083-2:2001
ICS:
33.060.40 Kabelski razdelilni sistemi Cabled distribution systems
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50083-2
NORME EUROPÉENNE
EUROPÄISCHE NORM November 2001
ICS 29.020; 33.060.40 Supersedes EN 50083-2:1995 + A1:1997
English version
Cable networks for television signals,
sound signals and interactive services
Part 2: Electromagnetic compatibility for equipment
Réseaux de distribution par câbles pour Kabelnetze für Fernsehsignale,
signaux de télévision, signaux de Tonsignale und interaktive Dienste
radiodiffusion sonore et services Teil 2: Elektromagnetische Verträglichkeit
interactifs von Geräten
Partie 2: Compatibilité électromagnétique
pour les matériels
This European Standard was approved by CENELEC on 2001-01-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard 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 European Standard 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, Czech Republic,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands,
Norway, Portugal, 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
© 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50083-2:2001 E
EN 50083-2: 2001 - 2 -
Foreword
This European Standard was prepared by CENELEC Technical Committee TC 209, "Cable
networks for television signals, sound signals and interactive services" on the basis of
EN 50083-2:1995, its amendment A1:1997 and a second amendment to EN 50083-2.
The text of this second amendment was submitted to the Unique Acceptance Procedure and was
approved by CENELEC on 2001-01-01 to be published as part of a second edition of
EN 50083-2.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2002-06-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2004-01-01
__________
- 3 - EN 50083-2: 2001
Contents
Page
1 Scope .4
1.1 General .4
1.2 Specific scope of this part 2 .4
2 Normative references.5
3 Terms, definitions, symbols and abbreviations .6
3.1 Terms and definitions.6
3.2 Symbols .10
3.3 Abbreviations .10
4 Methods of measurements.11
4.1 Disturbance voltages from equipment.11
4.1.1 Disturbance voltages from equipment in the frequency range from 9 kHz to 30 MHz 11
4.1.2 Disturbance voltages from equipment at the AC mains frequency and its harmonics 12
4.1.3 Measurement of input terminal disturbance voltage .12
4.2 Radiation from active equipment.12
4.2.1 General measurement requirements.12
4.2.2 Methods of measurements.13
4.3 Immunity of active equipment.18
4.3.1 Measurement of the external immunity to ambient fields.19
4.3 2 Internal immunity (Immunity to unwanted signals).22
4.4 Screening effectiveness of passive equipment .25
4.4.1 General measurement requirements.25
4.4.2 Methods of measurements.25
4.5 Electrostatic discharge immunity test for active equipment.26
4.6 Electrical fast transient/burst immunity test for AC power ports .26
5 Performance requirements.27
5.1 Disturbance voltages from equipment.27
5.1.1 Limits of mains terminal disturbance voltage.27
5.1.2 Limits of input terminal disturbance voltages.27
5.2 Radiation.27
5.2.1 Radiation from active equipment.27
5.2.2 Local oscillator power at the outdoor unit input .28
5.3 Immunity of active equipment.28
5.3.1 External immunity to electromagnetic fields .28
5.3.2 Internal immunity .29
5.3.3 Immunity of outdoor units to image frequency signals.30
5.4 Screening effectiveness of passive equipment .30
5.5 Electrostatic discharge immunity test for active equipment.31
5.6 Electrical fast transient/burst immunity test for AC power ports .31
Figures.32

EN 50083-2: 2001 - 4 -
1 Scope
1.1 General
Standards of EN 50083 series deal with cable networks for television signals, sound signals and
interactive services including equipment, systems and installations
� for headend-reception, processing and distribution of television and sound signals and their
associated data signals and
� for processing, interfacing and transmitting all kinds of signals for interactive services
using all applicable transmission media.
All kinds of networks like
� CATV-networks
� MATV-networks and SMATV-networks
� individual receiving networks
and all kinds of equipment, systems and installations installed in such networks, are within this
scope.
The extent of these standardisation work is from the antennas, special signal source inputs to the
headend or other interface points to the network up to the system outlet or the terminal input,
where no system outlet exists.
The standardisation of any user terminals (i.e. tuners, receivers, decoders, multimedia terminals
etc.) as well as of any coaxial and optical cables and accessories therefor is excluded.
1.2 Specific scope of this part 2
This standard
� applies to the radiation characteristics and immunity to electromagnetic disturbances of active
and passive equipment for the reception, processing and distribution of television, sound and
interactive services signals, as dealt with in the following parts of EN 50083 series:
- EN 50083-3 "Active wideband equipment for coaxial cable networks"
- EN 50083-4 "Passive wideband equipment for coaxial cable networks"
- EN 50083-5 "Headend equipment"
- EN 50083-6 "Optical equipment"
� covers the following frequency ranges:
Disturbance voltage injected into the mains 9 kHz to 30 MHz
Radiation from active equipment 5 MHz to 25 GHz
Immunity of active equipment 150 kHz to 25 GHz
1)
Screening effectiveness of passive equipment 5 MHz to  3 GHz (25 GHz)
________________________________
1)
For "Screening effectiveness of passive equipment" no requirements apply at present for the frequency range 3 GHz
to 25 GHz. Methods of measurement and limits are investigated for inclusion in a future amendment or revised edition.

- 5 - EN 50083-2: 2001
� specifies requirements for maximum allowed radiation, minimum immunity and minimum
screening effectiveness;
� describes test methods for conformance testing.
Coaxial cables for cable networks do not fall under the scope of this standard. Reference is made
to the European Standard series EN 50117 "Coaxial cables used in cabled distribution networks".
Standardisation in the field of „Electromagnetic compatibility“ for any user terminals (e.g. tuners,
receivers, decoders, multimedia terminals etc.) is covered by the European Standards EN 55013
and EN 55020.
Requirements for the electromagnetic compatibility of receiver leads are laid down in
EN 60966-2-4, EN 60966-2-5 and EN 60966-2-6.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of
any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to
applies (including amendments).
EN 50082-1 1997 Electromagnetic compatibility (EMC)
Generic immunity standard
Part 1: Residential, commercial and light industry
EN 50083 series Cable networks for television signals, sound signals and interactive
services
EN 50083-3 1998 Part 3: Active wideband equipment for coaxial cable networks
EN 50083-4 1998 Part 4: Passive wideband equipment for coaxial cable networks
EN 50083-5 2001 Part 5: Headend equipment
EN 50083-6 1997 Part 6: Optical equipment
EN 50083-8 2000 Part 8: Electromagnetic compatibility for networks
EN 50117 series Coaxial cables used in cabled distribution networks
EN 55013 1990 Limits and methods of measurement of radio disturbance
characteristics of broadcast receivers and associated equipment
(CISPR 13:1975 + A1:1983, modified)
EN 55020 1994 Electromagnetic immunity of broadcast receivers and associated
equipment
EN 60966-2-4 1997 Radio frequency and coaxial cable assemblies; Part 2-4: Detail
specification for cable assemblies for radio and TV receivers
(Frequency range 0 to 3000 MHz, IEC 60169-2 connectors)
(IEC 60966-2-4:1997)
EN 60966-2-5 1999 Radio frequency and coaxial cable assemblies; Part 2-5: Detail
specification for cable assemblies for radio and TV receivers
(Frequency range 0 to 1000 MHz, IEC 60169-2 connectors)
(IEC 60966-2-5:1998)
EN 50083-2: 2001 - 6 -
EN 60966-2-6 1999 Radio frequency and coaxial cable assemblies; Part 2-6: Detail
specification for cable assemblies for radio and TV receivers
(Frequency range 0 to 3000 MHz, IEC 60169-24 connectors)
(IEC 60966-2-6:1998)
EN 61000-3-2 1995 Electromagnetic compatibility (EMC)
Part 3: Limits - Section 2: Limits for harmonic current emissions
(equipment input current up to and including 16 A per phase)
(IEC 61000-3-2:1995)
EN 61000-4-2 1996 Electromagnetic compatibility (EMC)
Part 4: Testing and measurement techniques
Section 2: Electrostatic discharge immunity test
(IEC 61000-4-2:1995)
EN 61000-4-3 1996 Electromagnetic compatibility (EMC)
Part 4: Testing and measurement techniques
Section 3: Radiated, radio-frequency, electromagnetic field
immunity test (IEC 61000-4-3:1995)
EN 61000-4-4 1995 Electromagnetic compatibility (EMC)
Part 4: Testing and measurement techniques
Section 4: Electrical fast transient/burst immunity test
(IEC 61000-4-4:1995)
EN 61000-4-6 1996 Electromagnetic compatibility (EMC)
Part 4: Testing and measurement techniques
Section 6: Immunity to conducted disturbances, induced by
radio-frequency fields (IEC 61000-4-6:1996)
EN 61079-1 1993 Methods of measurement on receivers for satellite broadcast
transmissions in the 12 GHz band - Part 1: Radio- frequency
measurements on outdoor units (IEC 61079-1:1992)
IEC 60050(161) 1990 International Electrotechnical Vocabulary (IEV)
Chapter 161: Electromagnetic compatibility
CISPR 16-1 1993 Specification for radio disturbance and immunity measuring
apparatus and methods - Part 1: Radio disturbance and immunity
measuring apparatus
3 Terms, definitions, symbols and abbreviations
3.1 Terms and definitions
For the purposes of this standard, the definitions contained in IEC 60050(161) "Electromagnetic
compatibility" apply. The most important definitions of IEC 60050(161) are repeated hereafter with
the IEC-numbering given in brackets. In addition some more specific definitions, used in this
standard, are listed.
3.1.1
radiation (electromagnetic) [IEV 161-01-10]
1. the phenomenon by which energy in the form of electromagnetic waves emanates
from a source into space
2. energy transferred through space in the form of electromagnetic waves
NOTE  By extension, the term "electromagnetic radiation" sometimes also covers induction phenomena.

- 7 - EN 50083-2: 2001
3.1.2
immunity (to a disturbance) [IEV 161-01-20]
ability of a device, equipment or system to perform without degradation in the presence
of an electromagnetic disturbance
3.1.3
internal immunity [IEV 161-03-06]
ability of a device, equipment or system to perform without degradation in the presence
of electromagnetic disturbances appearing at its normal input terminals or antenna
3.1.4
external immunity [IEV 161-03-07]
ability of a device, equipment or system to perform without degradation in the presence
of electromagnetic disturbances entering other than via its normal input terminals or
antenna
3.1.5
mains immunity [IEV 161-03-03]
immunity to mains-borne disturbance
3.1.6
immunity level [IEV 161-03-14]
maximum level of a given electromagnetic disturbance incident on a particular device,
equipment or system for which it remains capable of operating at a required degree of
performance
3.1.7
immunity limit [IEV 161-03-15]
specified minimum immunity level
3.1.8
immunity margin [IEV 161-03-16]
the ratio of the immunity limit to the electromagnetic compatibility level
3.1.9
electromagnetic disturbance [IEV 161-01-05]
any electromagnetic phenomenon which may degrade the performance of a device,
equipment or system, or adversely affect living or inert matter
NOTE  An electromagnetic disturbance may be an electromagnetic noise, an unwanted signal or a change in the
propagation medium itself.
3.1.10
screening effectiveness
ability of an equipment or system to attenuate the influence of electromagnetic fields
from outside the equipment or system or to suppress the radiation of electromagnetic
fields from inside the equipment or system
3.1.11
well-matched
matching condition when the return loss of the equipment complies with the requirements
of EN 50083-3, Table 1
EN 50083-2: 2001 - 8 -
3.1.12
well-screened
a test set-up can be considered "well-screened" if its radiation level, when terminated
with a matched load, is at least 20 dB below the expected radiation level of the
equipment under test, the test set-up and the equipment being supplied with the same
input signal level
3.1.13
electromagnetic interference (EMI) [IEV 161-01-06]
degradation of the performance of an equipment, transmission channel or system caused
by an electromagnetic disturbance
NOTE 1  In English, the terms "electromagnetic disturbance" and "electromagnetic interference" designate respectively
the cause and the effect, but they are often used indiscriminately.
NOTE 2  In French, the terms "perturbation électromagnétique" and "brouillage électromagnétique" designate
respectively the cause and the effect, and should not be used indiscriminately.
3.1.14
operating frequency range
the passband for the wanted signals for which the equipment has been designed
3.1.15
wanted signal
during measurements, the wanted signal shall be simulated using a sinewave test signal
having the frequency within the operating frequency range and the appropriate level
3.1.16
unwanted signal
signals inside and outside of the operating frequency range that are not considered as
wanted signals
When measuring immunity (to unwanted signals), the unwanted signal shall be simulated
using two sine-wave test signals.
3.1.17
first satellite intermediate frequency range
output frequency range of the outdoor unit which is comprised of the frequency band
between 950 MHz and at least 3 GHz or parts thereof
3.1.18
carrier-to-interference ratio
minimum level difference measured at the output of an active equipment between the
wanted signal and
– intermodulation products of the wanted signal and/or unwanted signals generated due to
non-linearities;
– harmonics generated by an unwanted signal;
– unwanted signals that have penetrated into the operating frequency range;
– unwanted signals that have been converted to the frequency range to be protected (operating
frequency range).
3.1.19
individual receiving system
system designed to provide television and sound signals to an individual household

- 9 - EN 50083-2: 2001
3.1.20
spurious signals
all unwanted signals in the frequency range of interest
3.1.21
band
nominal operating frequency range of the equipment
3.1.22
electrostatic discharge (ESD) [IEV 161-01-22]
a transfer of electric charge between bodies of different electrostatic potential in
proximity or through direct contact
3.1.23
transient (adjective and noun) [IEV 161-02-01]
pertaining to or designating a phenomenon or a quantity which varies between two
consecutive steady states during a time interval short compared with the time-scale of
interest
3.1.24
burst [IEV 161-02-07]
sequence of a limited number of distinct pulses or an oscillation of limited duration
3.1.25
test levels
preferential range of test level for ESD or fast transient test
3.1.26
port
particular interface of the specific equipment with the external electromagnetic
environment:
Enclosure port
AC power port ����� ����� Signal port
EQUIPMENT
DC power port ����� ����� Control port
3.1.27
enclosure port
physical boundary of the equipment through which electromagnetic fields may be
transmitted
3.1.28
signal port
point at which a cable for the wanted signal is connected to the equipment

EN 50083-2: 2001 - 10 -
3.1.29
control port
point at which a cable for the control signal is connected to the equipment
3.1.30
AC power port
point at which a cable for the AC power supply is connected to the equipment
3.1.31
DC power port
point at which a cable for the DC power supply is connected to the equipment
3.1.32
in-band immunity
immunity against disturbance at any frequency of the wanted signals carried at the
interfaces and used internally within the equipment under test (e.g. input/output
frequencies, IF, video band, etc.)
3.1.33
out-of-band immunity
immunity against disturbance from signals outside the frequency band(s) of the wanted
signal carried at the interfaces and used internally within the equipment under test (e.g.
input/output frequencies, IF, video band, etc.)
3.1.34
RF signal port
antenna input port or RF network port
3.1.35
antenna input port
input terminal of the equipment (e.g channel converter, DBS tuner,.) under test
3.1.36
RF network port
point at which a coaxial cable for the wanted RF signal is connected to the equipment
but excluding direct connection to the antenna
3.2 Symbols
Under consideration
3.3 Abbreviations
AC alternating current
ALC automatic level control
AM amplitude modulation
BSS broadcast satellite services
CATV Community Antenna Television (system)
COFDM Coded Orthogonal Frequency Division Multiplex
CW continuous wave
DBS direct broadcast satellite

- 11 - EN 50083-2: 2001
DSR digital satellite radio
EMC electromagnetic compatibility
emf electromotive force
EMI electromagnetic interference
EUT equipment under test
FM frequency modulation
FSS fixed satellite services
IF intermediate frequency
LNB low noise broadband-converter
MATV Master Antenna Television (system)
QAM quadrature amplitude modulation
QPSK quadrature phase shift keying
RF radio frequency
SAT satellite
S-channel special channel
SMATV Satellite Master Antenna Television (system)
TV television
VHF very high frequency
VSB vestigial side band
NOTE  Only the abbreviations used in the English version of this part of EN 50083 are mentioned in this subclause.
The German and the French versions of this part may use other abbreviations. Refer to 3.3 of each language version
for details.
4 Methods of measurements
General operating conditions
Measurements shall be, unless otherwise specified, carried out with the rated performance of the
equipment under test and at a standard room temperature. If required, additional measurements
shall be carried out at the highest and lowest rated ambient temperatures.
The equipment shall be tested including all those sub-assemblies with which it would normally be
used.
4.1 Disturbance voltages from equipment
4.1.1 Disturbance voltages from equipment in the frequency range from 9 kHz to 30 MHz
Introduction
The method described is applicable to the measurement of disturbance voltages from equipment
in the frequency range of 9 kHz to 30 MHz on the mains line.
The measured voltage includes narrowband interference and broadband interference such as
that produced by semiconductor rectifiers.
4.1.1.1 General measurement requirements
Disturbance voltage measurements should be carried out in a screened room according to the
method described in EN 55013, with the exception that the wanted signal is a sinusoidal carrier.
At all frequencies in the range of interest the disturbance voltage injected into the mains by the
equipment under test shall be measured by means of a specified artificial mains network with a
measuring receiver having a quasi-peak detector for broadband measurements and an average
detector for narrowband measurements.

EN 50083-2: 2001 - 12 -
4.1.1.2 Measurement of mains terminal disturbance voltages
Equipment required: According to EN 55013
Equipment layout and connections: According to EN 55013
Operating conditions
The equipment under test shall be operated in accordance with the manufacturers
recommendations and tested under conditions which maximise the disturbance voltages.
All RF-ports shall be terminated with non-radiating loads of their nominal impedance. The supply
voltage shall be set to a value within the specified rating.
Measuring procedure: According to EN 55013
Presentation of results: According to EN 55013
The results shall be expressed in terms of dB(µV) and shall comply with the limits given in
Table 1.
4.1.2 Disturbance voltages from equipment at the AC mains frequency and its harmonics
If the input current rating is within the scope of EN 61000-3-2, the limits and test methods of this
standard shall apply.
4.1.3 Measurement of input terminal disturbance voltage
Method of measurement
The measurement shall be performed according to the method described in EN 55013 where
"antenna terminal" should be intended as "input terminal" of the equipment (e.g. channel
converter, DBS tuner, etc.) under test.
Presentation of the results
The disturbance voltage level of the equipment under test at the local oscillator frequency and its
harmonics shall be expressed in terms of input terminal disturbance voltage in dB(µV) and shall
comply with the relevant limits given in Table 2.
4.2 Radiation from active equipment
Introduction
The methods described are applicable to the measurement of radiation from active equipment at the
signal frequencies, at the local oscillator frequencies and their harmonics and at other relevant
frequencies.
In the frequency range 5 MHz to 30 MHz the "coupling unit" method is used.
In the frequency range 30 MHz to 950 MHz the "absorbing clamp" method of EN 55013 is used.
In the frequency range 950 MHz to 25 GHz the "substitution" method is used.
4.2.1 General measurement requirements
The measurement cables, coupling devices and terminations shall all be well-matched and well-
screened. If these conditions cannot be achieved, appropriate corrections shall be made for the
results. Test equipment shall be 75 � impedance or provided with appropriate matching pads.
An indoor, or outdoor, site may be used. When indoors, a room of sufficient size must be chosen,
so that any reflecting and absorbing objects may be so positioned or sufficiently removed from
the measuring set-up that they do not influence the results.

- 13 - EN 50083-2: 2001
Measurements shall be made at the following ports:
– all RF-ports;
– the mains lead (if any);
– all single or multiple wire connections (if any).
Measurements shall be made at the following frequencies:
Single channel equipment
– at the vision and sound carrier frequencies;
– at any other frequency where disturbance can occur.
Wideband equipment
– at the highest and lowest vision carrier frequencies in each used band and at a selection of
intervening frequencies chosen to give a realistic representation of the radiation pattern
throughout the operating frequency range.
– at any other frequency where disturbance can occur.
Frequency converters
Output ports and mains lead (if any):
– at the input and output vision and sound carrier frequencies;
– at all local oscillator fundamental frequencies;
– at any local oscillator harmonic, and any other frequencies where disturbance can occur.
Input ports:
– at all local oscillator fundamental frequencies;
– at selected local oscillator harmonics, or other frequencies (as above).
4.2.2 Methods of measurements
4.2.2.1 Measurement of radiation in the frequency range 5 MHz to 30 MHz
For the measurement of radiation in the frequency range 5 MHz to 30 MHz the coupling unit
method suitable for coaxial cables having a characteristic impedance of 75 � shall be used to
measure the conducted emissions from the equipment under test.
NOTE  The use of the absorbing clamp method is also possible in this frequency range. This clamp has similar
properties as the 150 � coupling units and can be used whenever the coupling units cannot be realised or applied
(either due to the number of conductors in one cable or due to the size of the installation or for other reasons). The
measurement set-up and the calibration factors are shown in the manual of the injection clamp.
Equipment required
The following equipment is required:
– one or more signal generators for the wanted signals;
– a RF measuring receiver or spectrum analyser covering the frequency range of interest;
– combiners (for pilot signals);
– appropriate coupling units (see EN 55020);
– well screened terminating loads and cables.
NOTE 1  All equipment used for the measurement set-up must be well screened to avoid inaccurate measuring
results. Especially the coaxial coupling units have to be designed for a screening effectiveness greater than 100 dB.

EN 50083-2: 2001 - 14 -
NOTE 2  It shall be ascertained that the level of background interfering signals (ingress) is at least 10 dB below the
relevant limit, otherwise the result may be significantly affected.
Equipment layout and connections
The layout of the test equipment is shown in Figure 1. The equipment under test is placed
10 cm above a metallic ground plane of dimension 1 m x 2 m. The coupling units are inserted
into the cables. The wanted signal generator is connected to the coupling unit which is
connected to the input of the equipment under test. The RF measuring receiver shall be
connected to the measuring output of each coupling unit successively. The cables connecting
the coupling units to the equipment under test shall be as short as possible.
The cables to the input and output of the equipment should be not longer than 30 cm and the
mains lead (if any) should be bundled to give a length of 30 cm. The distance between the leads
or cables and the ground plane shall be not less than 3 cm.
The mains lead (if any) is not connected to a coupling unit but shall be provided with absorbing
devices to avoid the influence of disturbance voltages on the mains lead.
Operating conditions
The equipment under test shall operate in accordance with the manufacturers recommendations
and under conditions which maximise the radiation. The maximum rated output level shall be
used for the test and stated on the equipment or accompanying data sheet by the manufacturer.
Measurement procedure
The generator for the wanted signal is adjusted to the required test frequency and its level is set
to the maximum specified operating level at the output of the equipment.
The measuring receiver is successively connected to all coupling units. All unused ports shall be
terminated.
For each measuring frequency the maximum reading is noted.
Presentation of the results
The readings on the measuring set have to be corrected according to the coupling attenuation
of the used coupling units.
For coupling units with R = 75 � the coupling attenuation is 3 dB.
In this case a measuring receiver of 75 � impedance has to be used.
NOTE  Alternatively coupling units with R = 100 � can be used for measuring receivers with 50 � input impedance. In
this case the coupling attenuation is about 5 dB (4,77 dB).
The radiation level of the equipment under test shall be expressed in terms of power in dB(pW)
and shall comply with the limits given in Table 3.
4.2.2.2 Measurement of radiation in the frequency range 30 MHz to 950 MHz using the
"absorbing clamp" method
Equipment required
The equipment required for the "absorbing clamp" method is listed below.
– a signal generator covering the frequency range of interest and of sufficient output power;
– an absorbing clamp conforming to CISPR 16-1;
– a measuring set of appropriate impedance covering the frequency range of interest;
– a measurement cable of length at least �/2 (at the lowest frequency of interest) plus 0,6 m
and of appropriate impedance;
- 15 - EN 50083-2: 2001
– screened terminating loads of appropriate impedance and design;
– all necessary coupling devices of an appropriate design;
– a mains filter able to remove extraneous noise from the mains supply in the frequency range
of interest;
– absorbing devices such as ferrite rings sufficient to suppress signals from the equipment
under test on its input and mains leads;
– a suitable coaxial changeover switch.
Equipment layout and connections
The measurement set-up and equipment layout for the "absorbing clamp" method (30 MHz to
950 MHz) is shown in Figures 2, 3 and 4.
The equipment under test shall be placed at a height of approximately 1 m above the ground on a
non-metallic support on which the absorbing clamp can be accommodated and moved.
If no input signal is required (e.g. for measurements of local oscillator radiated power) the input
shall be terminated by means of a well screened load. For measurements of local oscillator power
at the input of the outdoor unit see 4.2.2.4.
The output of the equipment under test shall be connected to a measurement cable of the same
characteristic impedance and the cable shall be terminated with the nominal impedance of the
output via the coaxial switch.
Well-screened cables shall be connected to the terminals of the equipment under test as
specified by the manufacturer. When a direct connection cannot be made due to the dimension
of the well- screened cable, an adaptor shall be used.
The unused outputs, if any, of the equipment under test shall be terminated with their nominal
impedance by means of non-radiating loads directly connected without any cabling.
The mains lead, if any, shall be placed vertically and connected to the mains outlet through a
suitable mains filter. Any excess length of the mains lead shall be coiled up neatly at the filter
end.
The mains lead and the signal generator coaxial cable shall be provided with suitable absorbing
devices (e.g. ferrite rings), placed close to the equipment under test, to avoid measurement
errors.
Operating conditions
The equipment under test shall be operated in accordance with the manufacturer's
recommendations.
The equipment under test shall be tested under conditions which maximise the radiation. The
maximum rated output level shall be used for the test and stated on the equipment or
accompanying data sheet by the manufacturer.
The supply voltage shall be set to a value within the specified rating.
Adjustable controls accessible to the user or installer shall be set so as to maximise radiation.
The signal generator at the input shall be adjusted so that the maximum rated output level, within
the operating range of the equipment under test, is used.
For sensibly consistent results the dispositions of the signal generator cable preceding the
absorbing device, the mains lead, the measurement cable beyond the absorbing clamp and their
proximity to other items shall not influence the readings on the measuring set by more than
± 1 dB. This can be checked by moving the cables and by running the hand along their length
after setting up the equipment in accordance with Figures 2 and either 3 or 4.

EN 50083-2: 2001 - 16 -
NOTE 1  At frequencies below about 100 MHz it may be necessary to add a second absorbing clamp at the far end of
the measurement cable as shown in Figure 2. This is to compensate for the reduced absorption of the clamp at these
frequencies.
NOTE 2  The absorbing clamp can be calibrated in accordance with the relevant clauses of CISPR 16-1.
Measurement procedure
With the equipment set-up as shown in Figures 2 and 3, and the measurement cable coupled to
an output port of the equipment under test, the absorbing clamp is positioned at the equipment
end of the measurement cable and the coaxial switch placed in the "check level" position. Adjust
the signal generator to the test frequency and to an input level that will give the maximum rated
output level from the equipment under test.
Tune the measuring set. Turn the coaxial switch to the "measure radiation" mode. Move the
absorbing clamp along the cable away from the equipment until a maximum reading is obtained
on the measuring set (at a spacing of about �/2).
This procedure is repeated for each of the test frequencies and for each of the measurement
ports.
For radiation measurements on a frequency converter output port, note that the input signal
generator shall be set in turn to the input frequencies used and the measuring set tuned to each
of the particular output frequencies.
For radiation measurements on the mains lead of active equipment, the equipment shall be
connected as shown in Figure 3, except that the mains lead without absorbing devices, extended
if necessary, shall pass through the absorbing clamp in place of the measurement cable.
Measurements shall be carried out as described above except that the "check-level" position of
the coaxial switch is inoperative with this arrangement. Set the signal generator output level to
that used when measuring the output port.
Presentation of results
The readings on the measurement set have to be corrected according to the calibration curve of
the absorbing clamp to obtain the radiated power.
The radiation level of the equipment under test shall be expressed in terms of substituted power
in dB(pW) and shall comply with the limits given in Table 3.
4.2.2.3 Measurement of radiation in the frequency range 950 MHz to 25 GHz using the
"substitution" method
Equipment required
The equipment required for the "substitution" method is listed below:
– a signal and/or pilot frequency generator covering the frequency range of interest and of
sufficient output power;
– suitable receiving antennas covering the frequency range(s) of interest;
– suitable calibrated transmitting antennas covering the frequency range(s) of interest;
– a spectrum analyser of appropriate impedance covering the frequency range of interest;
– high quality connecting coaxial cables of appropriate impedance;
– screened terminating loads of appropriate impedance and design;
– a mains filter able to remove extraneous noise from the mains supply in the frequency range
of interest;
– a low-noise preamplifier (if needed).

- 17 - EN 50083-2: 2001
Equipment layout and connections
The equipment under test shall be placed on a support of non-metallic material, the height of
which shall be 1 m above the ground, as shown in Figure 5a.
Equipment which needs an input signal and/or pilot frequencies shall be connected to a suitable
signal and/or pilot frequency generator through a well-screened coaxial cable.
If no input signal is required (e.g. for measurements of local oscillator radiated power), the input
shall be terminated by means of a well screened load. For measurements of local oscillator power
at the input of the outdoor unit see 4.2.2.4.
The unused outputs, if any, of the equipment under test shall be terminated with their nominal
impedance by means of well-screened loads.
The mains lead, if any, shall be placed vertically and connected to the mains outlet through a
suitable mains filter. Any excess length of the mains lead shall be coiled up neatly at the filter
end.
The mains lead and the signal generator coaxial cable shall be provided with suitable absorbing
devices (e.g. ferrite rings), placed close to the equipment under test, to avoid measurement
errors.
Operating conditions
The equipment under test shall operate in accordance with the manufacturers recommendations
and under conditions which maximise the radiation. The maximum rated output level shall be
used for the test and stated on the equipment or accompanying data sheet by the manufacturer.
The measurements shall be made with a directional antenna of small aperture capable of making
separate measurements of the vertical and horizontal polarisation of the radiated field. The height
above the ground of the centre line of the antenna shall be the same as the height of the
approximate radiation centre of the equipment under test.
In order to avoid the influence of the ground reflection on the results, it is recommended to use a
suitable horn antenna. In that case no metallic ground plane is needed. To fulfil the "Fraunhofer
conditions" the measuring distance shall be
d > 2 b²/�
where:
b is the wider dimension of the horn mouth;
�� is the wavelength corresponding to the test frequency.
The measuring set used in this frequency range usually consists of a spectrum analyser. If the
radiation level is low, a low-noise preamplifier may be needed.
Test site validation
The validation of the test site shall be determined as follows. A transmitting antenna shall be
mounted at the position where it is intended that the approximate radiation centre (usually the
volume centre) of the equipment under test is to be placed. The receiving antenna shall be
placed at the same position as that chosen for the actual measurements. The two antennas shall
be placed so that they have the same polarisation which shall be perpendicular to an imaginary
line between them. Tests shall be made in the horizontal and vertical polarisation planes.
The test site shall be considered suitable for the purpose of measurement at a test frequency if
the indication on the measuring set changes by no more than 1,5 dB when the centre of the
transmitting antenna is moved from 0 cm to 20 cm in any direction from its initial position.
NOTE  The gain of the applied transmitting antenna in dB above the half-wave dipole shall be taken into account.

EN 50083-2: 2001 - 18 -
Measurement procedure
Measurements shall be made by the substitution method with the antenna having both horizontal
and vertical polarisations and the turntable with the equipment under test shall be rotated. The
equipment shall be rotated in all planes. The highest level of radiation measured shall be noted at
each measuring frequency.
Then the equipment under test is replaced by a calibrated transmitting antenna supplied by a
standard generator. Its centre shall be placed in the same initial position of the equipment centre
according to Figure 5b.
For each measuring frequency the output level of the generator is adjusted in order to give the
same reference indication on the spectrum analyser as achieved with the EUT. The level of the
available power of the generator, increased by the radiating antenna gain above the half-wave
dipole, is taken as the level of the radiated power of the equipment under test at the considered
frequency.
NOTE  The equivalent radiated power is given by the following equation:
P = P � A + G
g c a
where:
P is the equivalent radiated power in dB(pW);
P is the available power of the generator in dB(pW);
g
A is the loss of any cables and adaptors between generator and antenna in dB;
c
G is the gain of the transmitting antenna in dB referred to the half-wave dipole antenna.
a
It shall be ascertained that, when the equipment under test is switched off, the level of back-
ground noise is at least 10 dB below the relevant limit, otherwise the reading may be significantly
affected.
Presentation of
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