EN IEC 55016-1-1:2019/prA1:2025(FRAG 1)

• Status: Not Published
• Publication Date: 12-Jan-2027
• ICS: 33.100.10 - Emission
• Technical Committee: CLC/TC 210 - Electromagnetic Compatibility (EMC)
• Drafting Committee: CLC/TC 210 - Electromagnetic Compatibility (EMC)
• Current Stage: 4060 - Enquiry results established and sent to TC, SR, BTTF - Enquiry
• Start Date: 31-Oct-2025
• Completion Date: 31-Oct-2025
• Ref Project: SIST EN IEC 55016-1-1:2019/oprA1:2025 - Amendment 1 - Fragment 1: 18 GHz - 40 GHz Instrumentation

• Amends: EN IEC 55016-1-1:2019 - Specification for radio disturbance and immunity measuring apparatus and methods - Part 1-1: Radio disturbance and immunity measuring apparatus - Measuring apparatus
• Effective Date: 16-May-2023

EN IEC 55016-1-1:2019/prA1:2025(FRAG 1) is a CENELEC and IEC amendment fragment to CISPR 16-1-1, the specification for radio disturbance and immunity measuring apparatus and methods. It updates measuring receiver requirements for the 18 GHz to 40 GHz range, so it is aimed at EMC test laboratories, calibration teams, receiver manufacturers, and engineers who need to verify high-frequency disturbance measurements.

What does EN IEC 55016-1-1:2019/prA1:2025(FRAG 1) specify?

EN IEC 55016-1-1:2019/prA1:2025(FRAG 1) specifies the proposed changes to CISPR 16-1-1:2019 for measuring apparatus used in radio disturbance measurements up to 40 GHz. The fragment focuses on the instrumentation side of the standard, while the related discontinuous-analyzers work is handled in a separate project.

This amendment updates the core receiver characteristics, detector behavior, emissions from the measuring receiver itself, and calibration checks. It also updates the named normative references that support those measurements.

Annex	What it covers
Annex A	Determination of response to repeated pulses of quasi-peak and RMS-average measuring receivers
Annex E	Response of average and peak measuring receivers, including pulse testing above 1 GHz
Annex J	Requirements when using an external preamplifier with a measuring receiver
Annex K	Calibration requirements and suggested verification frequencies

What are the key requirements of EN IEC 55016-1-1:2019/prA1:2025(FRAG 1)?

High-frequency receiver characteristics

EN IEC 55016-1-1:2019/prA1:2025(FRAG 1) extends receiver requirements into Band F, the 18 GHz to 40 GHz range. Clause 4.2 adds input impedance requirements for this band, and Clause 4.3 keeps the sine-wave voltage tolerance tied to a 50 Ω source impedance.

In practice, this means a receiver used above 18 GHz has to meet defined input match and measurement accuracy expectations before it can be used for compliant EMC testing.

Clause 4.5 also extends the bandwidth provisions to Band F and states that the selected bandwidth must be reported if it differs from the reference bandwidth. That matters because measured disturbance levels depend strongly on the receiver bandwidth used.

Pulse response and detector behavior

Clauses 6, 7, and 8 extend peak detector, average detector, and RMS-average detector requirements from 18 GHz to 40 GHz. The document also adds Band F to the pulse-response tables and to the overload-factor checks.

For users, this means the receiver is not only checked for steady signals but also for how it behaves with pulse-modulated signals, narrowband disturbances, and overload conditions at high frequency. That is important when measuring modern equipment that produces short or intermittent emissions.

Clause 7 defines average-detector behavior above 1 GHz with linear and logarithmic modes, and Clause 8 defines RMS-average behavior with a meter-simulating network. The practical effect is that the receiver must reproduce the specified response to pulses in a controlled and repeatable way.

Emissions from the measuring receiver and external preamplifiers

Clause 4.12 tightens the view of the receiver as a source of unwanted radiation. It extends the radiated-emissions limit check and applies class B limits over a wider frequency range, with a stated average field-strength limit in the 6 GHz to 18 GHz range.

Annex J adds Band F considerations for systems using an external preamplifier. The system must be designed so that strong lower-frequency or out-of-band signals do not overload it. That matters in real EMC labs where a weak spurious signal may be measured next to a much stronger signal.

APD measurements

Clause 9 extends the amplitude probability distribution (APD) measuring function to 40 GHz. The clause links APD use to cases where the potential to cause interference to digital communication systems is being assessed.

What terms does EN IEC 55016-1-1:2019/prA1:2025(FRAG 1) define?

• Impulse bandwidth - the bandwidth term used to describe how a measuring receiver responds to pulses, and it is central to how pulse measurements are reported.
• Voltage standing wave ratio (VSWR) - a measure of input match; lower VSWR means less reflection at the receiver input, which improves high-frequency measurement quality.
• Pulse repetition frequency (PRF) - the rate at which pulses repeat, used to define the test signal conditions in the pulse-response clauses.
• Electromotive force (EMF) - the signal level referenced at the source side of the test setup, used in the pulse-modulated carrier specifications.
• Amplitude probability distribution (APD) - a measuring function that describes how often different signal amplitudes occur, used here to assess interference potential.
• Quasi-peak detector - a detector with specified charge and discharge behavior, used as a reference for repeated-pulse response in the annexes.
• RMS-average detector - a detector based on root-mean-square averaging, used for measurements of pulses and intermittent disturbances.

Who uses EN IEC 55016-1-1:2019/prA1:2025(FRAG 1)?

EN IEC 55016-1-1:2019/prA1:2025(FRAG 1) is used by EMC test laboratories, calibration laboratories, and measuring-receiver manufacturers. It is also relevant to system designers who use external preamplifiers, and to engineers measuring emissions from equipment that operates into the millimeter-wave range.

Buyers and quality managers use it to check whether a receiver or test system is specified for the right detector type, band, bandwidth, and verification method. Test engineers use it to set up pulse tests, verify overload margins, and document calibration frequencies.

What changed in EN IEC 55016-1-1:2019/prA1:2025(FRAG 1) from the previous edition?

EN IEC 55016-1-1:2019/prA1:2025(FRAG 1) is Amendment 1 to CISPR 16-1-1:2019 (Edition 5.0). The stated changes include:

• extending the relevant receiver requirements from 18 GHz to 40 GHz
• adding Band F to the impedance, bandwidth, pulse-response, overload, detector, and calibration tables
• updating the normative references, including CISPR 16-3:2020 for APD background material
• correcting a bibliography cross-reference linked to the impulse-bandwidth definition
• correcting an equation in Annex A
• adding Band F considerations to the external preamplifier annex

Which standards are used with EN IEC 55016-1-1:2019/prA1:2025(FRAG 1)?

EN IEC 55016-1-1:2019/prA1:2025(FRAG 1) names these supporting standards:

• CISPR 11:2024 - provides the class B limits used for radiated-emissions comparison in Clause 4.12
• CISPR 14-1:2020 - provides emission requirements for household appliances, electric tools, and similar apparatus
• CISPR 16-2-1:2014 and AMD1:2017 - provide conducted disturbance measurement methods
• CISPR 16-2-2:2010 - provides disturbance-power measurement methods
• CISPR 16-2-3:2016, AMD1:2019, and AMD2:2023 - provide radiated disturbance measurement methods
• CISPR TR 16-3:2020 - provides technical background for APD specifications
• IEC 60050-161:1990 - provides EMC vocabulary used for terms and definitions

What does the EN IEC 55016-1-1:2019/prA1:2025(FRAG 1) document contain?

The document contains the amendment text for clauses on scope, references, definitions, receiver characteristics, detector response, and APD use. It also contains tables for input impedance, bandwidth, pulse specifications, overload behavior, and verification frequencies.

Annex A gives the method for repeated-pulse response, Annex E covers pulse testing above 1 GHz, Annex J covers external preamplifier design, and Annex K lists suggested calibration and verification frequencies. Those annexes are the practical part of the document for labs that have to test or calibrate receivers rather than just read the clause text.

SLOVENSKI STANDARD
01-oktober-2025
Instrumentacija 18 GHz - 40 GHz - Dopolnilo A1
Amendment 1 - Fragment 1: 18 GHz - 40 GHz Instrumentation
Amendement 1 - Fragment 1 : 18 GHz - 40 GHz Instrumentation
Ta slovenski standard je istoveten z: EN IEC 55016-1-1:2019/prA1:2025
ICS:
17.220.20 Merjenje električnih in Measurement of electrical
magnetnih veličin and magnetic quantities
33.100.20 Imunost Immunity
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CIS/A/1469/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
CISPR 16-1-1/AMD1/FRAG1 ED5
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-08-08 2025-10-31
SUPERSEDES DOCUMENTS:
CIS/A/1410/CD, CIS/A/1434A/CC
IEC CIS/A : RADIO-INTERFERENCE MEASUREMENTS AND STATISTICAL METHODS
SECRETARIAT: SECRETARY:
United States of America Mr Nicholas Abbondante
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
CIS/B,CIS/D,CIS/F,CIS/H,CIS/I
ASPECTS CONCERNED:
Electromagnetic Compatibility
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is
the final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Amendment 1 - Fragment 1: 18 GHz - 40 GHz Instrumentation

PROPOSED STABILITY DATE: 2026
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
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NOTE FROM TC/SC OFFICERS:
This CDV was prepared by CISPR/A AHG7 and is based on the comments received on the second
committee draft (see CISPR/A/1410/CD and CISPR/A/1434/CC) and decisions taken during the AHG7
meeting on 23rd of October 2024. The proposed changes are marked in red.
In addition, correction is included of a clear error in a Clause 3 note-to-entry Bibliography cross-
reference, as found during CISPR/A Editing Committee review of the draft CDV. Specifically, the Biblio.
reference for Formula (4), in Note 1 to entry of 3.6 impulse bandwidth, is corrected from [12] CISPR
16-2 series, to [9] Keller and Feser (in accordance with the associated originating documents
CIS/A/1247/CC and CIS/A/1215A/CD). Other editorial changes across the entire Ed 5.0 are deferred
for consideration during future maintenance work.

CISPR CDV 16-1-1/AMD1/FRAG1 © IEC 2025
1 INTERNATIONAL ELECTROTECHNICAL COMMISSION
2 INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
3 ____________
5 SPECIFICATION FOR RADIO DISTURBANCE AND IMMUNITY
6 MEASURING APPARATUS AND METHODS –
8 Part 1-1: Radio disturbance and immunity measuring apparatus –
9 Measuring apparatus
11 AMENDMENT 1
13 FOREWORD
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42 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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44 9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
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48 the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
49 shall not be held responsible for identifying any or all such patent rights.
50 Amendment 1 to CISPR 16-1-1 has been prepared by CISPR subcommittee A: Radio-
51 interference measurements and statistical methods.
CISPR CDV 16-1-1/AMD1/FRAG1 © IEC 2025
52 The text of this Amendment is based on the following documents:
Draft Report on voting
XX/XX/XXXX XX/XX/XXX
54 Full information on the voting for its approval can be found in the report on voting indicated in
55 the above table.
56 The language used for the development of this Amendment is English.
57 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
58 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
59 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
60 described in greater detail at www.iec.ch/publications/.
61 The committee has decided that the contents of this document will remain unchanged until the
62 stability date indicated on the IEC website under webstore.iec.ch in the data related to the
63 specific document. At this date, the document will be
64 • reconfirmed,
65 • withdrawn, or
66 • revised.
67 ____________
69 Introduction
70 (not to be included at publication)
71 Proposed revision of CISPR 16-1-1 on specifications for receivers
72 in the frequency range 18 GHz to 40 GHz.
73 This CDV was prepared by CISPR/A AHG7 and is based on the comments received on the
74 second committee draft (see CISPR/A/1410/CD and CISPR/A/1434/CC) and decisions taken
rd
75 during the AHG7 meeting on 23 of October 2024. The proposed changes are marked in red.
76 In addition, correction is included of a clear error in a Clause 3 note-to-entry Bibliography cross-
77 reference, as found during CISPR/A Editing Committee review of the draft CDV. Specifically,
78 the Biblio. reference for Formula (4), in Note 1 to entry of 3.6 impulse bandwidth, is corrected
79 from [12] CISPR 16-2 series, to [9] Keller and Feser (in accordance with the associated
80 originating documents CIS/A/1247/CC and CIS/A/1215A/CD). Other editorial changes across
81 the entire Ed 5.0 are deferred for consideration during future maintenance work.
82 Two projects in the present CISPR/A work programme cover Amendment 1 to Ed. 5.0 of CISPR
83 16-1-1:
84 – CISPR 16-1-1/AMD1/FRAG1 ED5, 18-40 GHz Instrumentation
85 – CISPR 16-1-1/AMD1/FRAG2 ED5, Discontinuous Analyzers; CIS/A/1435/CDV,
86 CIS/A/1463/RVC
87 This draft is part of the FRAG1 project for the first amendment to Ed. 5.0.
88 Numbering of subclauses and figures are per CISPR 16-1-1:2019 (ED5).
CISPR CDV 16-1-1/AMD1/FRAG1 © IEC 2025
89 1 Scope
st
90 Replace 18 GHz by 40 GHz in the first sentence of the 1 paragraph to read:
91 This part of CISPR 16 specifies the characteristics and performance of equipment for the
92 measurement of radio disturbance in the frequency range 9 kHz to 40 GHz.
94 2 Normative references
95 Update the normative references as follows:
96 CISPR 11:2024, Industrial, scientific and medical equipment - Radio-frequency disturbance
97 characteristics - Limits and methods of measurement
98 CISPR 14-1:2020, Electromagnetic compatibility - Requirements for household appliances,
99 electric tools and similar apparatus - Part 1: Emission
100 CISPR 16-2-1:2014, Specification for radio disturbance and immunity measuring apparatus and
101 methods - Part 2-1: Methods of measurement of disturbances and immunity – Conducted
102 disturbance measurements
103 CISPR 16-2-1:2014/AMD1:2017
104 CISPR 16-2-2:2010, Specification for radio disturbance and immunity measuring apparatus and
105 methods - Part 2-2: Methods of measurement of disturbances and immunity - Measurement of
106 disturbance power
107 CISPR 16-2-3:2016, Specification for radio disturbance and immunity measuring apparatus and
108 methods - Part 2-3: Methods of measurement of disturbances and immunity – Radiated
109 disturbance measurements
110 CISPR 16-2-3:2016/AMD1:2019
111 CISPR 16-2-3:2016/AMD2:2023
112 CISPR TR 16-3:2020, Specification for radio disturbance and immunity measuring apparatus
113 and methods - Part 3: CISPR technical reports
114 IEC 60050-161:1990, International Electrotechnical Vocabulary (IEV) – Part 161:
115 Electromagnetic compatibility (available at www.electropedia.org)
117 3 Terms and definitions
118 3.6
119 impulse bandwidth
120 In Note 1 to entry replace [12] by [7], [9] as follows (footnote 1 cross-reference and content
121 unchanged):
122 For the Gaussian filter type, the relationship is [7], [9],
CISPR CDV 16-1-1/AMD1/FRAG1 © IEC 2025
125 4 Fundamental characteristics of a measuring receiver
126 4.2 Input impedance
127 Modify the caption of Table 1 and add a new table row with the VSWR requirements for the frequency
128 range 18 GHz to 40 GHz:
129 Table 1 – Requirements for receiver input impedance
Frequency range RF attenuation VSWR
dB
9 kHz to 1 GHz 0 2,0 to 1
9 kHz to 1 GHz ≥ 10 1,2 to 1
1 GHz to 18 GHz 0 3,0 to 1
1 GHz to 18 GHz ≥ 10 2,0 to 1
18 GHz to 40 GHz 0 3,0 to 1
18 GHz to 40 GHz ≥ 10 2,5 to 1
131 4.3 Sine-wave voltage tolerance
132 Delete the relaxed specification above 1 GHz, use the term “with” instead of “using”, and delete
133 “resistive”, to read:
134 The tolerance of sine-wave voltage measurement shall be better than ±2 dB when the
135 instrument measures a sine-wave signal with a 50 Ω source impedance.
137 4.4 Overall pass-band selectivity
138 Add Band F to the caption of Figure 4 to read:
139 Figure 4 – Limits for the overall selectivity – Pass-band (Bands E and F)
CISPR CDV 16-1-1/AMD1/FRAG1 © IEC 2025
142 4.5 Bandwidth
143 Add in Table 3 the bandwidth requirements for the frequency range 18 GHz to 40 GHz to read:
144 Table 3 – Bandwidth requirements for measuring receivers
Frequency range Bandwidth B Reference bandwidth
a, c
9 kHz to 150 kHz (Band A) 200 Hz (B )
100 Hz to 300 Hz
a, c
0,15 MHz to 30 MHz (Band B) 9 kHz (B )
8 kHz to 10 kHz
a, c
30 MHz to 1 000 MHz (Bands C and D) 120 kHz (B )
100 kHz to 500 kHz
a, c b
1 GHz to 18 GHz (Band E)
300 kHz to 2 MHz 1 MHz (B )
imp
a, c b
18 GHz to 40 GHz (Band F) 1 MHz (B )
300 kHz to 2 MHz
imp
a
Since the response of a peak measuring receiver to non-overlapping pulses is proportional to its impulse
bandwidth, either the actual bandwidth is quoted in the result or the level may be quoted as "in a 1 MHz
bandwidth,", calculated by dividing the measured value by the impulse bandwidth in MHz (see 3.6). For other
types of broadband disturbance, this procedure can introduce an error. Therefore, data measured with the
reference bandwidth shall take precedence.
b
The bandwidth selected shall be defined as the impulse bandwidth of the measuring receiver with a tolerance
of ±10 %.
c
The
...