SIST EN IEC 55016-1-1:2019/oprA1:2025

• Status: Not Published
• Public Enquiry End Date: 26-Oct-2025
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• ICS: 33.100.10 - Emission
• ICS: 33.100.20 - Immunity
• Technical Committee: EMC - Electromagnetic compatibility
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 19-Aug-2025
• Due Date: 06-Jan-2026
• Completion Date: 23-Oct-2025
• Ref Project: EN IEC 55016-1-1:2019/prA1:2025(FRAG 1) - Amendment 1 - Fragment 1: 18 GHz - 40 GHz Instrumentation

• Amends: SIST 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

SIST EN IEC 55016-1-1:2019/oprA1:2025 is the Slovenian adoption of IEC/CISPR Amendment 1, Fragment 1 to the radio disturbance and immunity measuring apparatus standard. It extends the receiver requirements in CISPR 16-1-1 into Band F, 18 GHz to 40 GHz, and updates the related performance, detector response, calibration, and preamplifier requirements. Engineers, test laboratories, calibration teams, and buyers of EMC measuring receivers use it when specifying or verifying equipment for CISPR compliance measurements.

What does SIST EN IEC 55016-1-1:2019/oprA1:2025 specify?

SIST EN IEC 55016-1-1:2019/oprA1:2025 specifies amendments to the characteristics and performance of equipment for measuring radio disturbance in the frequency range 9 kHz to 40 GHz. The fragment is organized as updates to the main receiver clauses and to Annexes A, E, J, and K.

The document keeps the CISPR 16-1-1 structure and revises specific clauses where Band F needs added requirements. In practice, this means the amendment is not a separate test method on its own - it changes the receiver specification, detector behavior, and verification details so the standard can be used above 18 GHz.

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
Annex J	Requirements when using an external preamplifier with a measuring receiver
Annex K	Calibration requirements for measuring receivers

What are the key requirements of SIST EN IEC 55016-1-1:2019/oprA1:2025?

SIST EN IEC 55016-1-1:2019/oprA1:2025 mainly adds Band F requirements across the receiver performance clauses. The practical effect is that equipment intended for CISPR measurements above 18 GHz must meet the same kind of receiver-performance checks already used at lower bands, but with Band F-specific limits and test signals.

Receiver input, selectivity, and bandwidth

Clause 4 adds Band F to the input impedance requirements, the bandwidth requirements, and the checks on intermodulation and emission from the measuring receiver. For users, this means the receiver input, filtering, and measurement bandwidth have to remain suitable when tuning in the 18 GHz to 40 GHz range.

Clause 4 also extends the radiated-emissions limit of the measuring receiver and links it to CISPR 11 class B limits over a wider range. In practice, the measuring receiver itself must not become a disturbance source that could affect other equipment or invalidate compliance measurements.

Peak, average, and RMS-average detector behavior

Clauses 6, 7, and 8 extend peak detector, average detector, and RMS-average detector requirements from 18 GHz to 40 GHz. They also add Band F to the pulse-response and overload checks. This matters because the receiver must still read pulses, intermittent signals, and narrowband disturbances consistently at the new upper frequency range.

Clause 7 introduces Band F into the average-detector response checks and defines how repeated pulse signals are used to verify the detector response above 1 GHz. Clause 8 does the same for RMS-average detectors and states how the meter-simulating network and time constants are used to represent the indicated result.

APD measuring function and external preamplifiers

Clause 9 extends the amplitude probability distribution (APD) measuring function to 40 GHz and links it to the assessment of interference potential to digital communication systems. For users, this means APD-capable receivers are relevant when the goal is to judge how likely a product is to disturb digital communication.

Annex J adds Band F to the design guidance for systems using an external preamplifier. The key practical point is overload protection: the system must be arranged so lower-frequency signals or unwanted out-of-band signals do not drive the receiver into overload.

What terms does SIST EN IEC 55016-1-1:2019/oprA1:2025 define?

• Band F - The CISPR receiver band covering 18 GHz to 40 GHz.
• Impulse bandwidth - The receiver bandwidth used for pulse-response descriptions and for quoting results with pulse signals.
• Voltage standing wave ratio (VSWR) - A measure of input impedance matching used to check receiver input performance.
• Pulse repetition frequency (PRF) - The repetition rate of a pulse-modulated signal used in detector-response tests.
• root mean square (RMS)-average detector - A detector that derives an RMS-based measurement result and is then filtered to emulate the required indication behavior.
• Amplitude probability distribution (APD) - A measuring function used to assess the potential of products or product families to cause interference to digital communication systems.

Who uses SIST EN IEC 55016-1-1:2019/oprA1:2025?

SIST EN IEC 55016-1-1:2019/oprA1:2025 is used by EMC test laboratories, receiver and instrument manufacturers, calibration laboratories, and engineers responsible for CISPR compliance measurements. It is also relevant to system designers using external preamplifiers, because Annex J addresses overload behavior in practical measurement setups.

The standard matters for industrial, scientific and medical equipment, household appliances, electric tools, and other products measured against CISPR disturbance limits. Buyers and quality managers use it to check that a receiver or measurement system is suitable for the frequency range and detector type they need.

What changed in SIST EN IEC 55016-1-1:2019/oprA1:2025 from the previous edition?

This amendment extends several CISPR 16-1-1 requirements from 18 GHz to 40 GHz, including the titles of the detector clauses and the related receiver characteristics in Clause 4. It also adds Band F requirements to the pulse-response, overload, and APD-related material.

The document updates the normative references, adds Band F to Annex J and Annex K, and corrects a bibliography cross-reference in Clause 3 for the impulse-bandwidth note. It also states that other editorial changes across the edition are deferred to future maintenance work.

Which standards are used with SIST EN IEC 55016-1-1:2019/oprA1:2025?

SIST EN IEC 55016-1-1:2019/oprA1:2025 cites CISPR 11:2024 for radio-frequency disturbance characteristics and limits, and CISPR 14-1:2020 for emission requirements for household appliances, electric tools, and similar apparatus. It also uses CISPR 16-2-1, CISPR 16-2-2, and CISPR 16-2-3 for conducted, disturbance-power, and radiated disturbance measurement methods.

CISPR TR 16-3:2020 provides background material on APD specifications, while IEC 60050-161:1990 supplies the electromagnetic compatibility vocabulary used in the document. These references are needed because the amendment depends on the measurement methods, vocabulary, and limit structures defined elsewhere.

What does the SIST EN IEC 55016-1-1:2019/oprA1:2025 document contain?

The document contains revised clause text, updated tables, and one figure caption change for receiver selectivity. It also includes a corrected equation in Annex A and updated pulse-test descriptions in Annex E.

For practical use, the tables give the Band F receiver requirements, pulse-response conditions, overload factors, and comparison limits for detector behavior. Annex K provides suggested frequencies for verification of VSWR, sine-wave voltage tolerance, pulse response, and selectivity, which helps calibration and test labs plan receiver checks.

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
permission in writing from IEC.

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
14 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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36 6) All users should ensure that they have the latest edition of this publication.
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41 Publications.
42 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
43 indispensable for the correct application of this publication.
44 9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
45 patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
46 respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
47 may be required to implement this document. However, implementers are cautioned that this may not represent
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
...