CISPR 11:2015/AMD1:2016
(Amendment)Amendment 1 - Industrial, scientific and medical equipment - Radio-frequency disturbance characteristics - Limits and methods of measurement
Amendment 1 - Industrial, scientific and medical equipment - Radio-frequency disturbance characteristics - Limits and methods of measurement
Amendement 1 - Appareils industriels, scientifiques et médicaux - Caractéristiques de perturbations radioélectriques - Limites et méthodes de mesure
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CISPR 11 ®
Edition 6.0 2016-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
IN TERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
C OMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES
AMENDMENT 1
AMENDEMENT 1
Industrial, scientific and medical equipment – Radio-frequency disturbance
characteristics – Limits and methods of measurement
Appareils industriels, scientifiques et médicaux – Caractéristiques de
perturbations radioélectriques – Limites et méthodes de mesure
CISPR 11:2015-06/AMD1:2016-06(en-fr)
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CISPR 11 ®
Edition 6.0 2016-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
IN TERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
C OMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES
AMENDMENT 1
AMENDEMENT 1
Industrial, scientific and medical equipment – Radio-frequency disturbance
characteristics – Limits and methods of measurement
Appareils industriels, scientifiques et médicaux – Caractéristiques de
perturbations radioélectriques – Limites et méthodes de mesure
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.100.10 ISBN 978-2-8322-3435-8
– 2 – CISPR 11:2015/AMD1:2016
© IEC 2016
FOREWORD
This amendment has been prepared by CISPR Subcommittee B: Interference relating to
industrial, scientific and medical radio-frequency apparatus, to other (heavy) industrial
equipment, to overhead power lines, to high voltage equipment and to electric traction.
The text of this standard is based on the following documents:
CDV Report on voting
CISPR/B/627/CDV CISPR/B/639A/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 document using a
colour printer.
_____________
Introduction to Amendment 1
This Amendment introduces the fully-anechoic room (FAR) for measurements of the
disturbance field strength in the range 30 MHz to 1 GHz on equipment in the scope of
CISPR 11.
It contains the complete set of requirements for measurement of radiated disturbances from
equipment fitting into the validated test volume of a given FAR. It specifies a separation
distance of 3 m and restricts use of the FAR to measurements on table-top equipment.
At the moment the FAR can be used:
• for measurements on table-top equipment fitting into the validated test volume of the given
FAR,
• for a separation distance of 3 m only, and
• if the FAR was validated according to CISPR 16-1-4.
© IEC 2016
The limits for class A and class B group 1 equipment in this CDV base on the limits in the
generic emission standards IEC 61000-6-3:2006/AMD 1 (2010) and
IEC 61000-6-4:2006/AMD 1 (2010). The limits for class A and class B group 2 equipment
were derived using the same approximation formula as used when deriving the limits for the
generic emission standards in mid of the years 2000 to 2010. CISPR/H/104/INF, published in
2005, gives detailed explanations how these limits for the FAR were derived.
More detailed background information is still found in CISPR/B/627/CDV.
CISPR/B WG1 in October 2015
3 Terms and definitions
Add, after the existing definition 3.19, the following new terms and definitions:
3.20
fully-anechoic room
FAR
shielded enclosure, the internal surfaces of which are lined with radio-frequency-energy
absorbing material (i.e. RF absorber) that absorbs electromagnetic energy in the frequency
range of interest
3.21
open-area test site
OATS
facility used for measurements of electromagnetic fields the intention for which is to simulate
a semi-free-space environment over a specified frequency range that is used for radiated
emission testing of products
Note 1 to entry: An OATS typically is located outdoors in an open area, and has an electrically-conducting ground
plane.
3.22
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) that 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
6.1 General
Add, at the end of the existing text, the following new paragraph:
Where this standard gives options for testing particular requirements with a choice of test
methods, compliance can be shown against any of the test methods, using the specified limits
with the restrictions provided in the relevant tables. In any situation where it is necessary to
retest the equipment, the test method originally chosen should be used in order to ensure
consistency of the results.
6.2.2.3 Frequency range 150 kHz to 1 GHz
th
Replace, in the existing 4 paragraph of this subclause, the first sentence by the following
new sentence:
On an open-area test site (OATS) or in a semi-anechoic chamber (SAC), class A equipment
can be measured at a nominal distance of 3 m, 10 m or 30 m (see information in Table 6), and
class B equipment at a nominal distance of 3 m or 10 m (see information in Table 7).
– 4 – CISPR 11:2015/AMD1:2016
© IEC 2016
Add, before the existing Table 6, the following new paragraph:
In a fully-anechoic room (FAR) class A or class B equipment can be measured at a nominal
distance of 3 m (see information in Table 6 and Table 7), provided that the EUT fits into the
validated test volume of the given FAR. In conjunction with measurements according to this
standard, use of the FAR is restricted to table-top equipment.
Table 6 – Electromagnetic radiation disturbance limits for class A group 1 equipment
measured on a test site
Replace the existing table by the following:
Table 6 – Electromagnetic radiation disturbance limits
for class A group 1 equipment measured on a test site
OATS or SAC FAR
b b, c
10 m measuring distance 3 m measuring distance 3 m measuring distance
Frequency range rated power of rated power of rated power of
d a, d d a, d d a, d
MHz ≤ 20 kVA > 20 kVA ≤ 20 kVA > 20 kVA ≤ 20 kVA > 20 kVA
Quasi-peak Quasi-peak Quasi-peak Quasi-peak Quasi-peak Quasi-peak
dB(µV/m) dB(µV/m) dB(µV/m) dB(µV/m) dB(µV/m) dB(µV/m)
52 62
decreasing decreasing
linearly with linearly with
30 – 230 40 50 50 60
logarithm of logarithm of
frequency to frequency to
45 55
230 – 1 000 47 50 57 60 52 55
On an OATS or in a SAC, class A equipment can be measured at a nominal distance of 3 m, 10 m or 30 m. In case
of measurements at a separation distance of 30 m, an inverse proportionality factor of 20 dB per decade shall be
used to normalize the measured data to the specified distance for determining compliance.
At the transition frequency, the more stringent limit shall apply.
In the frequency range 30 MHz to 230 MHz, the limit for measurements in the FAR decreases linearly with the
logarithm of frequency.
a
These limits apply to equipment with a rated power of > 20 kVA and intended to be used at locations where
there is a distance greater than 30 m between the equipment and third party sensitive radio communications.
The manufacturer shall indicate in the technical documentation that this equipment is intended to be used at
locations where the separation distance to third party sensitive radio services is > 30 m. If these conditions are
not met, then the limits for ≤ 20 kVA apply.
b
The 3 m separation distance applies only to small size equipment meeting the size criterion defined in 3.17.
c
The table-top equipment shall fit into the validated test volume of the FAR.
d
Selection of the appropriate set of limits shall be based on the rated a.c. power stated by the manufacturer.
© IEC 2016
Table 7 – Electromagnetic radiation disturbance limits for class B group 1 equipment
measured on a test site
Replace the existing table by the following:
Table 7 – Electromagnetic radiation disturbance limits
for class B group 1 equipment measured on a test site
OATS or SAC FAR
a a, b
10 m measuring distance 3 m measuring distance 3 m measuring distance
Frequency range
Quasi-peak Quasi-peak Quasi-peak
MHz
dB(µV/m) dB(µV/m) dB(µV/m)
Decreasing linearly with
30 – 230 30 40
logarithm of frequency to
230 – 1 000 37 47 42
On an OATS or in a SAC, class B equipment can be measured at a nominal distance of 3 m or 10 m.
At the transition frequency, the more stringent limit shall apply.
a
The 3 m separation distance applies only to small size equipment meeting the size criterion defined in 3.17.
b
The table-top equipment shall fit into the validated test volume of the FAR.
6.3.2.3 Frequency range 150 kHz to 1 GHz
th th
Replace the existing 9 and 10 paragraph of this subclause by the following new
paragraphs:
On an open-area test site (OATS) or in a semi-anechoic chamber (SAC), class A equipment
can be measured at a nominal distance of 3 m, 10 m or 30 m, and class B equipment at a
nominal distance of 3 m or 10 m (see Tables 10 and 12).
In the frequency range 30 MHz to 1 GHz, a measuring distance of 3 m is allowed only for
equipment which complies with the definition given in 3.17.
Add, before the existing Table 10, the following new paragraphs:
In a fully-anechoic room (FAR) class A or class B equipment can be measured at a nominal
distance of 3 m, provided that the EUT fits into the validated test volume of the given FAR. In
conjunction with measurements according to this standard, use of the FAR is restricted to
table-top equipment.
For group 2 class A or B equipment other than EDM or arc welding, measurements in the FAR
in the range 30 MHz to 1 GHz shall be supplemented by measurement of the magnetic
component of the disturbance field strength in the range 150 kHz to 30 MHz, at an OATS or in
a SAC, see also footnote b in Table 10 and footnote c in Table 12.
– 6 – CISPR 11:2015/AMD1:2016
© IEC 2016
Table 10 – Electromagnetic radiation disturbance limits for class A group 2 equipment
measured on a test site
Replace the existing table by the following:
Table 10 – Electromagnetic radiation disturbance limits
for class A group 2 equipment measured on a test site
OATS or SAC FAR
Limits for a measuring distance D in m
a a, b
D = 30 m D = 10 m D = 3 m D = 3 m
Frequency
range Electric Magnetic Electric Magnetic Electric Magnetic Electric
field field field field field field field
MHz
Quasi- Quasi-peak Quasi- Quasi- Quasi- Quasi-peak Quasi-peak
peak peak peak peak
dB(µV/m) dB(µA/m) dB(µV/m) dB(µA/m) dB(µV/m) dB(µA/m) dB(µV/m)
0,15 – 0,49 – 33,5 – 57,5 – 82 –
0,49 – 1,705 – 23,5 – 47,5 – 72 –
1,705 – 2,194 – 28,5 – 52,5 – 77 –
2,194 – 3,95 – 23,5 – 43,5 – 68 –
decreasing
linearly with
3,95 – 11 – 8,5 – 18,5 – logarithm of –
frequency
to
28,5
11 – 20 – 8,5 – 18,5 – 28,5 –
20 – 30 – –1,5 – 8,5 – 18,5 –
30 – 47 58 – 68 – 78 – 80 to 78
47 – 53,91 40 – 50 – 60 – 60
53,91 – 54,56 40 – 50 – 60 – 60
54,56 – 68 40 – 50 – 60 – 60 to 59
68 – 80,872 53 – 63 – 73 – 72
80,872 – 81,848 68 – 78 – 88 – 87
81,848 – 87 53 – 63 – 73 – 72 to 71
87 – 134,786 50 – 60 – 70 – 68 to 67
134,786 – 136,414 60 – 70 – 80 – 77
136,414 – 156 50 – 60 – 70 – 67 to 66
156 – 174 64 – 74 – 84 – 80
174 – 188,7 40 – 50 – 60 – 56
188,7 – 190,979 50 – 60 – 70 – 66
190,979 – 230 40 – 50 – 60 – 56 to 55
230 – 400 50 – 60 – 70 – 65
400 – 470 53 – 63 – 73 – 68
470 – 1 000 50 – 60 – 70 – 65
On an OATS or in a SAC, class A equipment can be measured at a nominal distance of 3 m, 10 m or 30 m. A
measuring distance less than 10 m is allowed only for equipment which complies with the definition given in 3.17.
At the transition frequency, the more stringent limit shall apply. In certain frequency ranges, the limit for
measurements in the FAR decreases linearly with the logarithm of frequency.
a
In the frequency range 30 MHz to 1 GHz, the 3 m separation distance applies only to small size equipment
meeting the size criterion defined in 3.17.
b
The table-top equipment shall fit into the validated test volume of the FAR. In the range below 30 MHz, such
group 2 equipment shall be measured at an OATS or in a SAC (see limits in the respective magnetic field
column in this table).
© IEC 2016
Table 11 – Electromagnetic radiation disturbance limits for class A EDM and arc
welding equipment measured on a test site
Replace the existing table by the following:
Table 11 – Electromagnetic radiation disturbance limits
for class A EDM and arc welding equipment measured on a test site
OATS or SAC FAR
a a, b
10 m measuring distance 3 m measuring distance 3 m measuring distance
Frequency range
Quasi-peak Quasi-peak Quasi-peak
MHz
dB(µV/m) dB(µV/m) dB(µV/m)
80 90 102
Decreasing linearly with Decreasing linearly with Decreasing linearly with
30 – 230
logarithm of frequency to logarithm of frequency to logarithm of frequency to
60 70 75
230 – 1 000 60 70 75
On an OATS or in a SAC, class A equipment can be measured at a nominal distance of 3 m, 10 m or 30 m. In case
of measurements at a separation distance of 30 m, an inverse proportionality factor of 20 dB per decade shall be
used to normalize the measured data to the specified distance for determining compliance.
a
The 3 m separation distance applies only to small size equipment meeting the size criterion defined in 3.17.
b
The table-top equipment shall fit into the validated test volume of the FAR.
– 8 – CISPR 11:2015/AMD1:2016
© IEC 2016
Table 12 – Electromagnetic radiation disturbance limits for class B group 2 equipment
measured on a test site
Replace the existing table by the following:
Table 12 – Electromagnetic radiation disturbance limits
for class B group 2 equipment measured on a test site
OATS or SAC FAR
Limits for a measuring distance D in m
b c
D = 10 m D = 3 m D = 3 m D = 3 m
Frequency range
Electric field Magnetic
Electric field
MHz
field
a a a
Quasi- Average Quasi- Average Quasi-peak Quasi- Average
peak peak peak
dB(µV/m) dB(µV/m) dB(µA/m) dB(µV/m)
Decreasing
linearly with
0,15 – 30 – – – – the logarithm
of frequency
to
30 – 80,872 30 25 40 35 – 42 to 39 37 to 34
80,872 – 81,848 50 45 60 55 – 59 54
81,848 – 134,786 30 25 40 35 – 39 to 37 34 to 32
134,786 – 136,414 50 45 60 55 – 57 52
136,414 – 230 30 25 40 35 – 37 to 35 32 to 30
230 – 1 000 37 32 47 42 – 42 37
On an OATS or in a SAC, class B equipment can be measured at a nominal distance of 3 m or 10 m.
At the transition frequency, the more stringent limit shall apply. In certain frequency ranges, the limit for
measurements in the FAR decrease linearly with the logarithm of frequency.
a
The average limits apply to magnetron driven equipment and microwave ovens only. If magnetron driven
equipment or microwave ovens exceed the quasi-peak limit at certain frequencies, then the measurement
shall be repeated at these frequencies with the average detector and the average limits specified in this table
apply.
b
In the frequency range 30 MHz to 1 GHz, the 3 m separation distance applies only to small size equipment
meeting the size criterion defined in 3.17.
c
The table-top equipment shall fit into the validated test volume of the FAR. In the range below 30 MHz, such
group 2 equipment shall be measured at an OATS or in a SAC (see limits in the respective magnetic field
column in this table).
7.3.4.2 Frequency range from 30 MHz to 1 GHz
Replace the existing text of this subclause by the following new text and subclauses:
7.3.4.2.1 General
In the frequency range from 30 MHz to 1 GHz the antenna used shall be as specified in
CISPR 16-1-4.
Other antennas may be used provided the results can be shown to be within ±2 dB of the
results which would have been obtained using a balanced dipole antenna.
© IEC 2016
7.3.4.2.2 Open-area test site (OATS) and semi-anechoic chamber (SAC)
For measurements on an OATS or in a SAC, the centre of the antenna shall be varied
between 1 m and 4 m height for maximum indication at each test frequency. The nearest point
of the antenna to the ground shall be not less than 0,2 m. Measurements shall be performed
with the antenna oriented in both, horizontal and subsequently in vertical polarization.
7.3.4.2.3 Fully-anechoic room (FAR)
For measurements in a FAR, the antenna height is fixed at the geometrical middle height of
the validated test volume. Measurements shall be performed with the antenna oriented in both,
horizontal and subsequently in vertical polarization.
7.3.4.2.4 Other sites
For measurements in situ, the centre of the antenna shall be fixed at (2,0 ± 0,2) m height
above the ground.
7.5.1 General
Replace the entire text of this subclause, including Figures 3 and 4, by the following new text
and figures:
7.5.1 General
Consistent with typical applications of the equipment under test, the level of the disturbance
shall be maximized by varying the configuration of the equipment. An example of a typical
setup for measurements of radiated disturbances from a table-top EUT is provided in Figure 3.
The measurement arrangement shall be typical of normal installation practice and centred to
the turntable’s vertical axis.
NOTE 1 The extent to which this subclause is applicable to the measurement of an installation in situ will depend
on the flexibility inherent in each particular installation. The provisions of this subclause apply to in situ
measurements in so far as a particular installation allows for the position of cables to be varied and different units
within the installation to be operated independently, the extent to which the position of the installation can be
moved within the premises, etc.
For measurement of radiated disturbances on an OATS or in a SAC with a separation
distance of 3 m the assessment of the radiation from the cabling of the EUT shall be restricted
to those fractions of interconnecting cables (see 7.5.2) and mains cables (see 7.5.3) which
are within the test volume not exceeding 1,2 m diameter times 1,5 m height above ground.
For the measurement of radiated disturbances in a FAR, all cables dropping to the floor shall
be visible from the position of the antenna reference point for at least 80 cm, see Figure 3b.
Peripheral equipment not fitting into the test volume shall be excluded from the measurements
or decoupled from the test environment. If cables to peripheral equipment cannot be extended
to run out of test volume, then the peripheral equipment shall be placed within the imaginary
circle around the complete configuration of the EUT.
The measuring distance is defined from the reference point of the antenna to the boundaries
of an imaginary circle around the complete configuration of the EUT, see Figure 3a.
NOTE 2 Restriction of radiation assessment to the cable fractions inside the test volume can be achieved for
example by application of CMADs at the cables at the position where they leave the test volume. CISPR 16-2-3
gives further guidance on the application of CMADs.
– 10 – CISPR 11:2015/AMD1:2016
© IEC 2016
Dimensions in metres
Cables leaving the test volume run
B: Excess cable length bundle
vertically down towards the floor.
between 30 cm and 40 cm
Decoupling is achieved by using e.g. a
in length
CMAD at the position where they leave
the volume
B
Antenna reference
point
A: Spacing between
the enclosures
Cable bundles should be arranged
A
should be ≥ 0,1
in the middle of the cable
Peripheral
Non-conducting
support
Imaginary circle around the complete
configuration of the EUT
Boundary of the
L: 3 ±0,1
maximum test volume
L = Measuring distance
IEC
Figure 3a – Top view
Dimensions in metres
D: Diameter of the imaginary
Antenna reference
circle around the complete
point
configuration of the EUT
D
FAR:
Bottom-plane
EUT 1
of test volume
Measuring distance L: 3 ±0,1
Peripheral
FAR: from all cables going down at least
80 cm shall be directly visible from the
antenna reference point and not being
Non-conducting
hidden behind floor absorbers.
support
CMAD CMAD
CMAD: common-mode OATS, SAC: Groundplane
absorption device FAR: floor, e.g. covered by ferrite tiles
IEC
Figure 3b – Side view
Figure 3 – Example for a typical cable arrangement for measurements of
radiated disturbances in 3 m separation distance, Table-top EUT
An example of a typical unified test set up for floor standing equipment suitable for
measurement of conducted as well as radiated disturbances is shown in Figure 4. Further
examples of typical arrangements of the EUT and associated peripherals are given in
CISPR 16-2-3 and CISPR 16-2-1.
OATS, SAC: 0,8 ±0,01
EUT 1
A
EUT 2
EUT 2
© IEC 2016
Dimensions in metres
Non-conductive support
Typical spacing
0,8 ±0,08
AE
To power
0,2 ±0,02
supply /
AE
CMAD
CMAD
Insulation (< 0,15)
AMN
CMAD
Interconnecting cables
AMN
CMAD Special earthing
terminal IEC
Figure 4 – Example for a typical test set up for measurement of conducted
and/or radiated disturbances from a floor standing EUT, 3D view
The configuration of the equipment under test, including the exact placement of the CMAD
and the type of test site used for the measurement, shall be documented in the test report.
8.1 Ground planes
Replace, in the first existing paragraph, the first sentence by the following new sentence:
For the measurement of radiated disturbances at an open-area test site (OATS) and in a
semi-anechoic chamber (SAC) and for the measurement of conducted disturbances on any
test site, a ground plane shall be used.
Replace, in the second existing paragraph, the first sentence by the following new sentence:
A ground plane shall be used for the measurement of radiated disturbances, at an OATS and
in a SAC, and for the measurement of conducted disturbances, at any test site.
8.2.1 General
Replace the existing second paragraph of this subclause by the following new paragraph:
The measurement of conducted disturbances may be carried out:
a) on an OATS or in a SAC with the equipment under test having the same configuration as
used during the radiation measurement;
b) above a metal ground plane; or
c) within a screened room. Either the floor or one wall of the screened room shall act as the
reference ground plane.
EUT / AE
EUT / AE
– 12 – CISPR 11:2015/AMD1:2016
© IEC 2016
8.3 Radiation test site for 9 kHz to 1 GHz
Replace the existing title of this subclause by the following new title:
8.3 OATS and SAC for measurements in the range 9 kHz to 1 GHz
8.4 Alternative radiation test sites for the frequency range 30 MHz to 1 GHz
Replace, in the first existing paragraph, "5.2.6 of CISPR 16-1-4:2010/AMD 1:2012" by "5.3 of
CISPR 16-1-4:2010/AMD 1:2012".
Add, after the existing text 8.4, the following new subclause:
8.5 FAR for measurements in the range 30 MHz to 1 GHz
A fully-anechoic room (FAR) used for measurement of radiated disturbances in the frequency
range 30 MHz to 1 GHz shall comply with th
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