ETSI EN 303 883-1 V1.2.1 (2021-02)

Final draft ETSI EN 303 883-1 V1.2.1 (2020-12)

EUROPEAN STANDARD
Short Range Devices (SRD) and
Ultra Wide Band (UWB);
Part 1: Measurement techniques
for transmitter requirements
2 Final draft ETSI EN 303 883-1 V1.2.1 (2020-12)

Reference
REN/ERM-TGUWB-149-1
Keywords
SRD, testing, UWB
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: +33 4 92 94 42 00  Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2020.
All rights reserved.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.

3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and
of the oneM2M Partners. ®
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
3 Final draft ETSI EN 303 883-1 V1.2.1 (2020-12)
Contents
Intellectual Property Rights . 8
Foreword . 8
Modal verbs terminology . 8
Introduction . 9
1 Scope . 10
2 References . 10
2.1 Normative references . 10
2.2 Informative references . 10
3 Definition of terms, symbols and abbreviations . 12
3.1 Terms . 12
3.2 Symbols . 15
3.3 Abbreviations . 16
4 Overview . 17
4.1 Information . 17
4.2 Basic information about UWB . 17
5 TX requirements . 18
5.1 General . 18
5.1.1 General Guidance on TX measurements . 18
5.1.2 Emission Concept . 18
5.1.2.1 General . 18
5.1.2.2 UWB - EUT . 18
5.2 Operating Frequency Range (OFR) . 19
5.2.1 Definition . 19
5.2.2 Conformance Test . 20
5.3 Radiated Power (RP) . 20
5.3.1 Mean e.i.r.p. . 20
5.3.1.1 Description . 20
5.3.1.2 Conformance . 20
5.3.1.3 Method with a Spectrum Analyser . 20
5.3.1.4 Method with an RMS Power Meter . 21
5.3.1.5 Method with a Peak Power Meter . 22
5.3.2 Mean e.i.r.p. Spectral Density . 22
5.3.2.1 Description . 22
5.3.2.2 Guidance for Mean e.i.r.p. Spectral Density Conformance Tests . 22
5.3.2.3 Mean e.i.r.p. Spectral Density, averaged over 1 ms . 22
5.3.2.4 Mean e.i.r.p. Spectral Density, known signal repetition time, averaged over 1 ms . 24
5.3.2.5 Mean e.i.r.p. Spectral Density, known signal repetition time, averaged over signal repetition time . 25
5.3.3 Peak e.i.r.p. . 26
5.3.3.1 Description . 26
5.3.3.2 Conformance . 26
5.3.3.3 Peak e.i.r.p.; Method with a Spectrum Analyser . 27
5.3.3.4 Peak e.i.r.p. Method with an RMS Power Meter. 27
5.3.3.5 Peak e.i.r.p. method with a Peak Power Meter . 27
5.3.4 Peak e.i.r.p. Spectral Density . 28
5.3.4.1 Description . 28
5.3.4.2 Peak e.i.r.p. Spectral Density, General Method . 28
5.3.4.3 Peak e.i.r.p. Spectral Density, Sparse Spectral Line Method . 30
5.4 Other Emissions (OE) . 30
5.5 TX Unwanted Emissions (TXUE) . 31
5.5.1 Description . 31
5.5.2 Limits for the TX Unwanted Emission . 32
5.5.3 General for Conformance Test for TX Unwanted Emission . 32
5.5.3.1 General . 32
ETSI
4 Final draft ETSI EN 303 883-1 V1.2.1 (2020-12)
5.5.3.2 Step 1: Measurement with Peak Detector . 32
5.5.3.3 Step 2: RMS Measurement . 33
5.6 Total Radiated Power (TRP) . 34
5.6.1 Description . 34
5.6.2 Conformance Test . 35
5.6.2.1 General . 35
5.6.2.2 TRP Conformance Assessment in steps: . 35
5.7 Indirect Emissions . 36
5.7.1 Description . 36
5.7.2 Guidance for Conformance Test . 40
5.8 Transmit Power Control . 40
5.8.1 Description . 40
5.8.2 Guidance for Conformance Test . 40
5.9 Detect and Avoid . 41
5.9.1 Description . 41
5.9.2 Limits . 41
5.9.2.1 DAA Parameters . 41
5.9.2.2 DAA NIM parameters . 42
5.9.2.3 DAA test parameters . 42
5.9.3 Conformance Test . 42
5.9.3.1 Introduction . 42
5.9.3.2 Initial Start-Up Test. 44
5.9.3.2.1 Start-up Procedure . 44
5.9.3.2.2 Test without a victim test signal during the Minimum Initial Channel Availability Check
Time, T . 44
avail_time_min
5.9.3.2.3 Test with a victim test signal at the beginning of the Minimum Initial Channel Availability
.................................................................................................................. 45
Check Time, Tavail_time_min
5.9.3.2.4 Test with a victim test signal at the end of the Minimum Initial Channel Availability Check
Time, T . 46
avail_time_min
5.9.3.3 In-Operation Test . 47
5.9.3.3.1 General Points for In-Operation Test . 47
5.9.3.3.2 In-Operation Test Procedure . 48
5.10 Listen Before Talk (LBT) . 49
5.10.1 Description . 49
5.10.2 Limits . 50
5.10.3 Conformance. 51
5.10.3.1 Measurement Procedure . 51
5.10.3.2 Test Set-Up . 51
5.10.3.3 Test Signal Definition for LBT Mechanism in Band 2 and 3 . 52
5.10.3.3.1 Band 2: Mobile Satellite Service (MSS) Test Signal. 52
5.10.3.3.2 Band 3: Land Mobile Service Test Signal . 52
5.10.3.4 Test Signal Definition for LBT Mechanism in Band 1 and 4 . 52
5.10.3.5 Conformance Test to Measure the Timing for LBT within bands 1 and 4 . 54
5.11 Duty Cycle. 55
5.11.1 Description . 55
5.11.2 Conformance. 56
5.11.2.1 Duty Cycle, Spectrum Analyser Method . 56
5.11.2.2 Duty Cycle, Oscilloscope Method . 56
5.11.2.3 Duty Cycle Measurement Methods for FMCW, stepped-frequency and Pulsed Systems . 58
5.11.2.3.1 General . 58
5.11.2.3.2 Method 1: Diode Power Detector . 58
5.11.2.3.3 Method 2: Spectrum Analyzer . 59
5.11.2.3.4 Method 3: Synchronized Spectrum Analysers. 60
5.11.2.4 Duty Cycle Measurement Methods within a frequency band for FMCW and stepped-frequency
systems . 61
5.11.2.4.1 General . 61
5.11.2.4.2 Synchronized Spectrum Analysers . 61
Annex A (normative): General Considerations and test conditions . 64
A.1 Overview . 64
A.2 Product Information . 64
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5 Final draft ETSI EN 303 883-1 V1.2.1 (2020-12)
A.3 Guidance on EUT Modulation for Testing . 65
A.4 Requirements in Case of EUT with Scanning Antennas . 65
A.4.1 Classification . 65
A.4.2 Measurement of Fixed Beam EUT . 65
A.4.3 Measurement of Constant Pattern EUT . 65
A.4.4 Measurement of Variable Pattern EUT . 66
A.5 Test Conditions, Power Supply and Ambient Temperatures . 66
A.5.1 General . 66
A.5.2 Power Sources . 66
A.5.2.1 Power Sources for Stand-Alone Equipment . 66
A.5.2.2 Power sources for plug-in radio devices . 67
A.5.3 Normal and Extreme Test Conditions . 67
A.5.3.1 Normal Test Conditions . 67
A.5.3.1.1 Normal Temperature and Humidity . 67
A.5.3.1.2 Normal Power Source . 67
A.5.3.1.2.1 Mains Voltage . 67
A.5.3.1.2.2 Lead-Acid Battery Power Sources used on Vehicles . 67
A.5.3.1.2.3 Other Power Sources . 67
A.5.3.2 Extreme Conditions . 67
A.5.3.2.1 Extreme Temperatures . 67
A.5.3.2.1.1 Procedure for Tests at Extreme Temperatures . 67
A.5.3.2.1.2 Extreme Temperature Ranges . 68
A.5.3.2.2 Extreme Test Source Voltages . 68
A.5.3.2.2.1 Mains Voltage . 68
A.5.3.2.2.2 Other Power Sources . 68
A.5.3.2.3 Radio Transparent Temperature Chamber . 68
A.5.3.2.4 Use of a Test Fixture . 68
A.5.3.2.4.1 General . 68
A.5.3.2.4.2 Characteristics . 69
A.5.3.2.4.3 Validation of the Test Fixture in the Temperature Chamber . 70
A.5.3.2.4.4 Use of the Test Fixture for Measurement in the Temperature Chamber . 71
A.6 Choice of Equipment for Test Suites . 71
A.6.1 Choice of Model . 71
A.6.2 Presentation . 71
A.7 Testing of Host Connected Equipment and Plug-In Radio Devices . 71
A.7.1 General . 71
A.7.2 The Use of a Host or Test Fixture for Testing Plug-In Radio Devices . 72
A.8 Interpretation of the measurement results . 72
A.8.1 General points on interpretation of the measurement results . 72
A.8.2 Measurement uncertainty is equal to or less than maximum acceptable uncertainty . 73
A.8.3 Measurement uncertainty is greater than maximum acceptable uncertainty . 73
Annex B (normative): Test setups . 74
B.1 Introduction . 74
B.2 Radiated measurements . 74
B.2.1 General . 74
B.2.2 Test Sites and General Arrangements for Measurements Involving the Use of Radiated Fields . 74
B.2.2.1 General . 74
B.2.2.2 Anechoic Chamber . 75
B.2.2.3 Anechoic Chamber with a Conductive Ground Plane . 76
B.2.2.4 Open Area Test Site (OATS) . 77
B.2.2.5 Test Antenna . 78
B.2.2.6 Substitution Antenna. 78
B.2.2.7 Measuring Antenna . 79
B.2.2.8 Minimum Requirements for Test Sites for Measurements above 18 GHz . 79
B.2.3 Guidance on the Use of a Radiation Test Site . 80
B.2.3.1 General on Guidance on the Use of a Radiation Test Site . 80
ETSI
6 Final draft ETSI EN 303 883-1 V1.2.1 (2020-12)
B.2.3.2 Verification of the Test Site . 80
B.2.3.3 Preparation of the EUT . 80
B.2.3.4 Power Supplies to the EUT . 81
B.2.3.5 Range Length . 81
B.2.3.5.1 General . 81
B.2.3.5.2 Practical Test Distances for Accurate Measurements . 81
B.2.3.6 Site Preparation . 82
B.2.4 Coupling of Signals . 82
B.2.4.1 General . 82
B.2.4.2 Data Signals . 83
B.2.5 Standard Radiated Test Methods . 83
B.2.5.0 Initial Measurement Steps . 83
B.2.5.1 General Information on Test Methods . 83
B.2.5.2 Calibrated Setup . 83
B.2.5.3 Substitution Method . 84
B.2.6 Standard calibration method . 84
B.3 Conducted Measurements . 86
B.4 Detailed Information to Standard Test Methods . 87
B.4.1 Spherical Scan with Automatic Test Antenna Placement . 87
B.4.1.1 General . 87
B.4.1.2 Calibrated Setup . 88
B.4.1.3 Substitution Method . 89
B.4.1.4 Spherical Scan with Rotating EUT . 89
B.4.1.4.1 General . 89
B.4.1.4.2 Calibrated Setup . 90
B.4.1.4.3 Substitution Method . 90
B.4.1.5 Spherical Scan Other Methods. 91
Annex C (normative): Signal Repetition Time . 92
C.1 Definitions . 92
C.2 Signal Types . 92
C.2.1 Pulsed signals . 92
C.2.2 FMCW signals, Stepped/Hopping Frequency Signals and Similar . 93
C.3 Measurement procedure for time parameters . 94
Annex D (normative): All Emission Measurement . 95
D.1 General . 95
D.2 First step . 95
D.3 Second step . 97
Annex E (normative): Guidance for a pre-scan of EUT operating frequency range(s) . 98
Annex F (informative): Measurement of peak e.i.r.p. and mean (average) e.i.r.p. of constant
duty cycle wideband pulsed signals . 99
F.1 General . 99
F.2 Exemplary measurement of pulse signals . 99
F.3 Mean e.i.r.p. measurements . 100
F.3.1 General . 100
F.3.2 Method I: Zero span mode . 100
F.3.3 Method II: Channel power measurement . 101
F.3.4 Method III: Average power meters . 102
F.4 Peak e.i.r.p. measurements . 102
F.4.1 General . 102
F.4.2 Method I: Zero span mode - direct measurement . 102
F.4.3 Method II: Peak e.i.r.p. calculation . 103
ETSI
7 Final draft ETSI EN 303 883-1 V1.2.1 (2020-12)
F.5 Max and mean PSD . 104
Annex G (informative): Change History . 106
History . 107

ETSI
8 Final draft ETSI EN 303 883-1 V1.2.1 (2020-12)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
Foreword
This final draft European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic
compatibility and Radio spectrum Matters (ERM), and is now submitted for the Vote phase of the ETSI standards EN
Approval Procedure.
The present document is part 1 of a multi-part deliverable covering Short Range Devices (SRD) and Ultra Wide Band
(UWB), as identified below:
Part 1: "Measurement techniques for transmitter requirements";
Part 2: "Measurement techniques for receiver requirements".

Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 6 months after doa

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
9 Final draft ETSI EN 303 883-1 V1.2.1 (2020-12)
Introduction
Ultra Wide Band (UWB) radio technology enables a new generation of high-speed data devices for short-range
communication purposes as well as location tracking and Sensor devices and opens new markets with a variety of
innovative applications.
UWB devices may form an integral part of other portable electronic equipment such as future generation cellular
phones or laptops equipped with UWB enabled short-range air interfaces.
In addition, UWB devices with an operating frequency range of several hundreds of MHz up to several GHz allow tens
of centimetre-level accuracy real time localization and positioning even in the presence of severe multipath effects
caused by walls, furniture or any other harsh radio propagation environments.
Based on the broad variety of different applications and the broad possible frequency range of operation the number of
possible deployed physical signal formats can be very large. The existing range of physical signal and modulation
formats range from traditional carrier based systems like OFDM over spread spectrum based system to carrier less
systems based on base band pulses. The frequency regulation on the other side only defines a single set of transmission
limits and values, which have to be fulfilled by all systems under the UWB regulation. Furthermore, the very high
channel bandwidth of a UWB signal gives a specific challenge to the needed measurement setup and the procedures.
Existing measurement methods need to be extended and new possible techniques should be described in the present
document.
The present document is structured as follows:
• Clauses 1 through 3 provide a general description on the types of equipment covered by the present document
and the definition of terms, symbols and abbreviations used.
• Clause 4 provides on overview on the technical and technology basics which were considered during the
preparation of the present document.
• Clause 5 specifies EUT TX requirements and the related conformance procedure.
• Annex A provides information on test conditions, used test sites and procedures.
• Annex B provides necessary information on radiated test procedures.
• Annex C provides information on TX signal types.
• Annex D provides information on the all emission concept.
• Annex E provides information for a pre-scan radiated power measurement test procedure.
• Annex F provides information on differences between the different emission power measurements.
• Annex G provides a change history table containing the major technical changes.

ETSI
10 Final draft ETSI EN 303 883-1 V1.2.1 (2020-12)
1 Scope
The present document summarizes the available information of possible measurement techniques and procedures for the
conformance measurement of various signal formats (e.g. Ultra Wide Band) in order to comply with the given
transmission limits given in the current regulation.
The present document could be used as a reference for existing and future ETSI standards covering UWB and other
technologies.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference/.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] ETSI TS 102 754: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Short
Range Devices (SRD); Technical characteristics of Detect And Avoid (DAA) mitigation
techniques for SRD equipment using Ultra Wideband (UWB) technology".
[2] ETSI TS 102 321: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Normalized Site Attenuation (NSA) and validation of a fully lined anechoic chamber up to
40 GHz".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document, but they assist the
...

EUROPEAN STANDARD
Short Range Devices (SRD) and
Ultra Wide Band (UWB);
Part 1: Measurement techniques
for transmitter requirements
2 ETSI EN 303 883-1 V1.2.1 (2021-02)

Reference
REN/ERM-TGUWB-149-1
Keywords
SRD, testing, UWB
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: +33 4 92 94 42 00  Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2021.
All rights reserved.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.

3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and
of the oneM2M Partners. ®
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
3 ETSI EN 303 883-1 V1.2.1 (2021-02)
Contents
Intellectual Property Rights . 8
Foreword . 8
Modal verbs terminology . 8
Introduction . 9
1 Scope . 10
2 References . 10
2.1 Normative references . 10
2.2 Informative references . 10
3 Definition of terms, symbols and abbreviations . 12
3.1 Terms . 12
3.2 Symbols . 15
3.3 Abbreviations . 16
4 Overview . 17
4.1 Information . 17
4.2 Basic information about UWB . 17
5 TX requirements . 18
5.1 General . 18
5.1.1 General Guidance on TX measurements . 18
5.1.2 Emission Concept . 18
5.1.2.1 General . 18
5.1.2.2 UWB - EUT . 18
5.2 Operating Frequency Range (OFR) . 19
5.2.1 Definition . 19
5.2.2 Conformance Test . 20
5.3 Radiated Power (RP) . 20
5.3.1 Mean e.i.r.p. . 20
5.3.1.1 Description . 20
5.3.1.2 Conformance . 20
5.3.1.3 Method with a Spectrum Analyser . 20
5.3.1.4 Method with an RMS Power Meter . 21
5.3.1.5 Method with a Peak Power Meter . 22
5.3.2 Mean e.i.r.p. Spectral Density . 22
5.3.2.1 Description . 22
5.3.2.2 Guidance for Mean e.i.r.p. Spectral Density Conformance Tests . 22
5.3.2.3 Mean e.i.r.p. Spectral Density, averaged over 1 ms . 22
5.3.2.4 Mean e.i.r.p. Spectral Density, known signal repetition time, averaged over 1 ms . 24
5.3.2.5 Mean e.i.r.p. Spectral Density, known signal repetition time, averaged over signal repetition time . 25
5.3.3 Peak e.i.r.p. . 26
5.3.3.1 Description . 26
5.3.3.2 Conformance . 26
5.3.3.3 Peak e.i.r.p.; Method with a Spectrum Analyser . 27
5.3.3.4 Peak e.i.r.p. Method with an RMS Power Meter. 27
5.3.3.5 Peak e.i.r.p. method with a Peak Power Meter . 27
5.3.4 Peak e.i.r.p. Spectral Density . 28
5.3.4.1 Description . 28
5.3.4.2 Peak e.i.r.p. Spectral Density, General Method . 28
5.3.4.3 Peak e.i.r.p. Spectral Density, Sparse Spectral Line Method . 30
5.4 Other Emissions (OE) . 30
5.5 TX Unwanted Emissions (TXUE) . 31
5.5.1 Description . 31
5.5.2 Limits for the TX Unwanted Emission . 32
5.5.3 General for Conformance Test for TX Unwanted Emission . 32
5.5.3.1 General . 32
ETSI
4 ETSI EN 303 883-1 V1.2.1 (2021-02)
5.5.3.2 Step 1: Measurement with Peak Detector . 32
5.5.3.3 Step 2: RMS Measurement . 33
5.6 Total Radiated Power (TRP) . 34
5.6.1 Description . 34
5.6.2 Conformance Test . 35
5.6.2.1 General . 35
5.6.2.2 TRP Conformance Assessment in steps: . 35
5.7 Indirect Emissions . 36
5.7.1 Description . 36
5.7.2 Guidance for Conformance Test . 40
5.8 Transmit Power Control . 40
5.8.1 Description . 40
5.8.2 Guidance for Conformance Test . 40
5.9 Detect and Avoid . 41
5.9.1 Description . 41
5.9.2 Limits . 41
5.9.2.1 DAA Parameters . 41
5.9.2.2 DAA NIM parameters . 42
5.9.2.3 DAA test parameters . 42
5.9.3 Conformance Test . 42
5.9.3.1 Introduction . 42
5.9.3.2 Initial Start-Up Test. 44
5.9.3.2.1 Start-up Procedure . 44
5.9.3.2.2 Test without a victim test signal during the Minimum Initial Channel Availability Check
Time, T . 44
avail_time_min
5.9.3.2.3 Test with a victim test signal at the beginning of the Minimum Initial Channel Availability
Check Time, T . 45
avail_time_min
5.9.3.2.4 Test with a victim test signal at the end of the Minimum Initial Channel Availability Check
Time, T . 46
avail_time_min
5.9.3.3 In-Operation Test . 47
5.9.3.3.1 General Points for In-Operation Test . 47
5.9.3.3.2 In-Operation Test Procedure . 48
5.10 Listen Before Talk (LBT) . 49
5.10.1 Description . 49
5.10.2 Limits . 50
5.10.3 Conformance. 51
5.10.3.1 Measurement Procedure . 51
5.10.3.2 Test Set-Up . 51
5.10.3.3 Test Signal Definition for LBT Mechanism in Band 2 and 3 . 52
5.10.3.3.1 Band 2: Mobile Satellite Service (MSS) Test Signal. 52
5.10.3.3.2 Band 3: Land Mobile Service Test Signal . 52
5.10.3.4 Test Signal Definition for LBT Mechanism in Band 1 and 4 . 52
5.10.3.5 Conformance Test to Measure the Timing for LBT within bands 1 and 4 . 54
5.11 Duty Cycle. 55
5.11.1 Description . 55
5.11.2 Conformance. 56
5.11.2.1 Duty Cycle, Spectrum Analyser Method . 56
5.11.2.2 Duty Cycle, Oscilloscope Method . 56
5.11.2.3 Duty Cycle Measurement Methods for FMCW, stepped-frequency and Pulsed Systems . 58
5.11.2.3.1 General . 58
5.11.2.3.2 Method 1: Diode Power Detector . 58
5.11.2.3.3 Method 2: Spectrum Analyzer . 59
5.11.2.3.4 Method 3: Synchronized Spectrum Analysers. 60
5.11.2.4 Duty Cycle Measurement Methods within a frequency band for FMCW and stepped-frequency
systems . 61
5.11.2.4.1 General . 61
5.11.2.4.2 Synchronized Spectrum Analysers . 61
Annex A (normative): General Considerations and test conditions . 64
A.1 Overview . 64
A.2 Product Information . 64
ETSI
5 ETSI EN 303 883-1 V1.2.1 (2021-02)
A.3 Guidance on EUT Modulation for Testing . 65
A.4 Requirements in Case of EUT with Scanning Antennas . 65
A.4.1 Classification . 65
A.4.2 Measurement of Fixed Beam EUT . 65
A.4.3 Measurement of Constant Pattern EUT . 65
A.4.4 Measurement of Variable Pattern EUT . 66
A.5 Test Conditions, Power Supply and Ambient Temperatures . 66
A.5.1 General . 66
A.5.2 Power Sources . 66
A.5.2.1 Power Sources for Stand-Alone Equipment . 66
A.5.2.2 Power sources for plug-in radio devices . 67
A.5.3 Normal and Extreme Test Conditions . 67
A.5.3.1 Normal Test Conditions . 67
A.5.3.1.1 Normal Temperature and Humidity . 67
A.5.3.1.2 Normal Power Source . 67
A.5.3.1.2.1 Mains Voltage . 67
A.5.3.1.2.2 Lead-Acid Battery Power Sources used on Vehicles . 67
A.5.3.1.2.3 Other Power Sources . 67
A.5.3.2 Extreme Conditions . 67
A.5.3.2.1 Extreme Temperatures . 67
A.5.3.2.1.1 Procedure for Tests at Extreme Temperatures . 67
A.5.3.2.1.2 Extreme Temperature Ranges . 68
A.5.3.2.2 Extreme Test Source Voltages . 68
A.5.3.2.2.1 Mains Voltage . 68
A.5.3.2.2.2 Other Power Sources . 68
A.5.3.2.3 Radio Transparent Temperature Chamber . 68
A.5.3.2.4 Use of a Test Fixture . 68
A.5.3.2.4.1 General . 68
A.5.3.2.4.2 Characteristics . 69
A.5.3.2.4.3 Validation of the Test Fixture in the Temperature Chamber . 70
A.5.3.2.4.4 Use of the Test Fixture for Measurement in the Temperature Chamber . 71
A.6 Choice of Equipment for Test Suites . 71
A.6.1 Choice of Model . 71
A.6.2 Presentation . 71
A.7 Testing of Host Connected Equipment and Plug-In Radio Devices . 71
A.7.1 General . 71
A.7.2 The Use of a Host or Test Fixture for Testing Plug-In Radio Devices . 72
A.8 Interpretation of the measurement results . 72
A.8.1 General points on interpretation of the measurement results . 72
A.8.2 Measurement uncertainty is equal to or less than maximum acceptable uncertainty . 73
A.8.3 Measurement uncertainty is greater than maximum acceptable uncertainty . 73
Annex B (normative): Test setups . 74
B.1 Introduction . 74
B.2 Radiated measurements . 74
B.2.1 General . 74
B.2.2 Test Sites and General Arrangements for Measurements Involving the Use of Radiated Fields . 74
B.2.2.1 General . 74
B.2.2.2 Anechoic Chamber . 75
B.2.2.3 Anechoic Chamber with a Conductive Ground Plane . 76
B.2.2.4 Open Area Test Site (OATS) . 77
B.2.2.5 Test Antenna . 78
B.2.2.6 Substitution Antenna. 78
B.2.2.7 Measuring Antenna . 79
B.2.2.8 Minimum Requirements for Test Sites for Measurements above 18 GHz . 79
B.2.3 Guidance on the Use of a Radiation Test Site . 80
B.2.3.1 General on Guidance on the Use of a Radiation Test Site . 80
ETSI
6 ETSI EN 303 883-1 V1.2.1 (2021-02)
B.2.3.2 Verification of the Test Site . 80
B.2.3.3 Preparation of the EUT . 80
B.2.3.4 Power Supplies to the EUT . 81
B.2.3.5 Range Length . 81
B.2.3.5.1 General . 81
B.2.3.5.2 Practical Test Distances for Accurate Measurements . 81
B.2.3.6 Site Preparation . 82
B.2.4 Coupling of Signals . 82
B.2.4.1 General . 82
B.2.4.2 Data Signals . 83
B.2.5 Standard Radiated Test Methods . 83
B.2.5.0 Initial Measurement Steps . 83
B.2.5.1 General Information on Test Methods . 83
B.2.5.2 Calibrated Setup . 83
B.2.5.3 Substitution Method . 84
B.2.6 Standard calibration method . 84
B.3 Conducted Measurements . 86
B.4 Detailed Information to Standard Test Methods . 87
B.4.1 Spherical Scan with Automatic Test Antenna Placement . 87
B.4.1.1 General . 87
B.4.1.2 Calibrated Setup . 88
B.4.1.3 Substitution Method . 89
B.4.1.4 Spherical Scan with Rotating EUT . 89
B.4.1.4.1 General . 89
B.4.1.4.2 Calibrated Setup . 90
B.4.1.4.3 Substitution Method . 90
B.4.1.5 Spherical Scan Other Methods. 91
Annex C (normative): Signal Repetition Time . 92
C.1 Definitions . 92
C.2 Signal Types . 92
C.2.1 Pulsed signals . 92
C.2.2 FMCW signals, Stepped/Hopping Frequency Signals and Similar . 93
C.3 Measurement procedure for time parameters . 94
Annex D (normative): All Emission Measurement . 95
D.1 General . 95
D.2 First step . 95
D.3 Second step . 97
Annex E (normative): Guidance for a pre-scan of EUT operating frequency range(s) . 98
Annex F (informative): Measurement of peak e.i.r.p. and mean (average) e.i.r.p. of constant
duty cycle wideband pulsed signals . 99
F.1 General . 99
F.2 Exemplary measurement of pulse signals . 99
F.3 Mean e.i.r.p. measurements . 100
F.3.1 General . 100
F.3.2 Method I: Zero span mode . 100
F.3.3 Method II: Channel power measurement . 101
F.3.4 Method III: Average power meters . 102
F.4 Peak e.i.r.p. measurements . 102
F.4.1 General . 102
F.4.2 Method I: Zero span mode - direct measurement . 102
F.4.3 Method II: Peak e.i.r.p. calculation . 103
ETSI
7 ETSI EN 303 883-1 V1.2.1 (2021-02)
F.5 Max and mean PSD . 104
Annex G (informative): Change History . 106
History . 107

ETSI
8 ETSI EN 303 883-1 V1.2.1 (2021-02)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
Foreword
This European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic compatibility and
Radio spectrum Matters (ERM).
The present document is part 1 of a multi-part deliverable covering Short Range Devices (SRD) and Ultra Wide Band
(UWB), as identified below:
Part 1: "Measurement techniques for transmitter requirements";
Part 2: "Measurement techniques for receiver requirements".

National transposition dates
Date of adoption of this EN: 22 February 2021
Date of latest announcement of this EN (doa): 31 May 2021
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 November 2021
Date of withdrawal of any conflicting National Standard (dow): 30 November 2021

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
9 ETSI EN 303 883-1 V1.2.1 (2021-02)
Introduction
Ultra Wide Band (UWB) radio technology enables a new generation of high-speed data devices for short-range
communication purposes as well as location tracking and Sensor devices and opens new markets with a variety of
innovative applications.
UWB devices may form an integral part of other portable electronic equipment such as future generation cellular
phones or laptops equipped with UWB enabled short-range air interfaces.
In addition, UWB devices with an operating frequency range of several hundreds of MHz up to several GHz allow tens
of centimetre-level accuracy real time localization and positioning even in the presence of severe multipath effects
caused by walls, furniture or any other harsh radio propagation environments.
Based on the broad variety of different applications and the broad possible frequency range of operation the number of
possible deployed physical signal formats can be very large. The existing range of physical signal and modulation
formats range from traditional carrier based systems like OFDM over spread spectrum based system to carrier less
systems based on base band pulses. The frequency regulation on the other side only defines a single set of transmission
limits and values, which have to be fulfilled by all systems under the UWB regulation. Furthermore, the very high
channel bandwidth of a UWB signal gives a specific challenge to the needed measurement setup and the procedures.
Existing measurement methods need to be extended and new possible techniques should be described in the present
document.
The present document is structured as follows:
• Clauses 1 through 3 provide a general description on the types of equipment covered by the present document
and the definition of terms, symbols and abbreviations used.
• Clause 4 provides on overview on the technical and technology basics which were considered during the
preparation of the present document.
• Clause 5 specifies EUT TX requirements and the related conformance procedure.
• Annex A provides information on test conditions, used test sites and procedures.
• Annex B provides necessary information on radiated test procedures.
• Annex C provides information on TX signal types.
• Annex D provides information on the all emission concept.
• Annex E provides information for a pre-scan radiated power measurement test procedure.
• Annex F provides information on differences between the different emission power measurements.
• Annex G provides a change history table containing the major technical changes.

ETSI
10 ETSI EN 303 883-1 V1.2.1 (2021-02)
1 Scope
The present document summarizes the available information of possible measurement techniques and procedures for the
conformance measurement of various signal formats (e.g. Ultra Wide Band) in order to comply with the given
transmission limits given in the current regulation.
The present document could be used as a reference for existing and future ETSI standards covering UWB and other
technologies.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference/.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] ETSI TS 102 754: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Short
Range Devices (SRD); Technical characteristics of Detect And Avoid (DAA) mitigation
techniques for SRD equipment using Ultra Wideband (UWB) technology".
[2] ETSI TS 102 321: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Normalized Site Attenuation (NSA) and validation of a fully lined anechoic chamber up to
40 GHz".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document, but they assist the
user with regard to a particular subject area.
[i.1] ETSI TS 103 060: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Short
Range Devices (SRD); Method for a harmonized definition of Du
...

SLOVENSKI STANDARD
01-april-2021
Naprave kratkega dosega (SRD) in ultra širokopasovna (UWB) tehnologija - 1. del:
Merilne tehnike za zahteve oddajnika
Short Range Devices (SRD) and Ultra Wide Band (UWB) - Part 1: Measurement
techniques for transmitter requirements
Ta slovenski standard je istoveten z: ETSI EN 303 883-1 V1.2.1 (2021-02)
ICS:
33.060.20 Sprejemna in oddajna Receiving and transmitting
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
Short Range Devices (SRD) and
Ultra Wide Band (UWB);
Part 1: Measurement techniques
for transmitter requirements
2 ETSI EN 303 883-1 V1.2.1 (2021-02)

Reference
REN/ERM-TGUWB-149-1
Keywords
SRD, testing, UWB
ETSI
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Sous-Préfecture de Grasse (06) N° 7803/88

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The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2021.
All rights reserved.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.

3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
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of the oneM2M Partners. ®
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
3 ETSI EN 303 883-1 V1.2.1 (2021-02)
Contents
Intellectual Property Rights . 8
Foreword . 8
Modal verbs terminology . 8
Introduction . 9
1 Scope . 10
2 References . 10
2.1 Normative references . 10
2.2 Informative references . 10
3 Definition of terms, symbols and abbreviations . 12
3.1 Terms . 12
3.2 Symbols . 15
3.3 Abbreviations . 16
4 Overview . 17
4.1 Information . 17
4.2 Basic information about UWB . 17
5 TX requirements . 18
5.1 General . 18
5.1.1 General Guidance on TX measurements . 18
5.1.2 Emission Concept . 18
5.1.2.1 General . 18
5.1.2.2 UWB - EUT . 18
5.2 Operating Frequency Range (OFR) . 19
5.2.1 Definition . 19
5.2.2 Conformance Test . 20
5.3 Radiated Power (RP) . 20
5.3.1 Mean e.i.r.p. . 20
5.3.1.1 Description . 20
5.3.1.2 Conformance . 20
5.3.1.3 Method with a Spectrum Analyser . 20
5.3.1.4 Method with an RMS Power Meter . 21
5.3.1.5 Method with a Peak Power Meter . 22
5.3.2 Mean e.i.r.p. Spectral Density . 22
5.3.2.1 Description . 22
5.3.2.2 Guidance for Mean e.i.r.p. Spectral Density Conformance Tests . 22
5.3.2.3 Mean e.i.r.p. Spectral Density, averaged over 1 ms . 22
5.3.2.4 Mean e.i.r.p. Spectral Density, known signal repetition time, averaged over 1 ms . 24
5.3.2.5 Mean e.i.r.p. Spectral Density, known signal repetition time, averaged over signal repetition time . 25
5.3.3 Peak e.i.r.p. . 26
5.3.3.1 Description . 26
5.3.3.2 Conformance . 26
5.3.3.3 Peak e.i.r.p.; Method with a Spectrum Analyser . 27
5.3.3.4 Peak e.i.r.p. Method with an RMS Power Meter. 27
5.3.3.5 Peak e.i.r.p. method with a Peak Power Meter . 27
5.3.4 Peak e.i.r.p. Spectral Density . 28
5.3.4.1 Description . 28
5.3.4.2 Peak e.i.r.p. Spectral Density, General Method . 28
5.3.4.3 Peak e.i.r.p. Spectral Density, Sparse Spectral Line Method . 30
5.4 Other Emissions (OE) . 30
5.5 TX Unwanted Emissions (TXUE) . 31
5.5.1 Description . 31
5.5.2 Limits for the TX Unwanted Emission . 32
5.5.3 General for Conformance Test for TX Unwanted Emission . 32
5.5.3.1 General . 32
ETSI
4 ETSI EN 303 883-1 V1.2.1 (2021-02)
5.5.3.2 Step 1: Measurement with Peak Detector . 32
5.5.3.3 Step 2: RMS Measurement . 33
5.6 Total Radiated Power (TRP) . 34
5.6.1 Description . 34
5.6.2 Conformance Test . 35
5.6.2.1 General . 35
5.6.2.2 TRP Conformance Assessment in steps: . 35
5.7 Indirect Emissions . 36
5.7.1 Description . 36
5.7.2 Guidance for Conformance Test . 40
5.8 Transmit Power Control . 40
5.8.1 Description . 40
5.8.2 Guidance for Conformance Test . 40
5.9 Detect and Avoid . 41
5.9.1 Description . 41
5.9.2 Limits . 41
5.9.2.1 DAA Parameters . 41
5.9.2.2 DAA NIM parameters . 42
5.9.2.3 DAA test parameters . 42
5.9.3 Conformance Test . 42
5.9.3.1 Introduction . 42
5.9.3.2 Initial Start-Up Test. 44
5.9.3.2.1 Start-up Procedure . 44
5.9.3.2.2 Test without a victim test signal during the Minimum Initial Channel Availability Check
Time, T . 44
avail_time_min
5.9.3.2.3 Test with a victim test signal at the beginning of the Minimum Initial Channel Availability
Check Time, T . 45
avail_time_min
5.9.3.2.4 Test with a victim test signal at the end of the Minimum Initial Channel Availability Check
Time, T . 46
avail_time_min
5.9.3.3 In-Operation Test . 47
5.9.3.3.1 General Points for In-Operation Test . 47
5.9.3.3.2 In-Operation Test Procedure . 48
5.10 Listen Before Talk (LBT) . 49
5.10.1 Description . 49
5.10.2 Limits . 50
5.10.3 Conformance. 51
5.10.3.1 Measurement Procedure . 51
5.10.3.2 Test Set-Up . 51
5.10.3.3 Test Signal Definition for LBT Mechanism in Band 2 and 3 . 52
5.10.3.3.1 Band 2: Mobile Satellite Service (MSS) Test Signal. 52
5.10.3.3.2 Band 3: Land Mobile Service Test Signal . 52
5.10.3.4 Test Signal Definition for LBT Mechanism in Band 1 and 4 . 52
5.10.3.5 Conformance Test to Measure the Timing for LBT within bands 1 and 4 . 54
5.11 Duty Cycle. 55
5.11.1 Description . 55
5.11.2 Conformance. 56
5.11.2.1 Duty Cycle, Spectrum Analyser Method . 56
5.11.2.2 Duty Cycle, Oscilloscope Method . 56
5.11.2.3 Duty Cycle Measurement Methods for FMCW, stepped-frequency and Pulsed Systems . 58
5.11.2.3.1 General . 58
5.11.2.3.2 Method 1: Diode Power Detector . 58
5.11.2.3.3 Method 2: Spectrum Analyzer . 59
5.11.2.3.4 Method 3: Synchronized Spectrum Analysers. 60
5.11.2.4 Duty Cycle Measurement Methods within a frequency band for FMCW and stepped-frequency
systems . 61
5.11.2.4.1 General . 61
5.11.2.4.2 Synchronized Spectrum Analysers . 61
Annex A (normative): General Considerations and test conditions . 64
A.1 Overview . 64
A.2 Product Information . 64
ETSI
5 ETSI EN 303 883-1 V1.2.1 (2021-02)
A.3 Guidance on EUT Modulation for Testing . 65
A.4 Requirements in Case of EUT with Scanning Antennas . 65
A.4.1 Classification . 65
A.4.2 Measurement of Fixed Beam EUT . 65
A.4.3 Measurement of Constant Pattern EUT . 65
A.4.4 Measurement of Variable Pattern EUT . 66
A.5 Test Conditions, Power Supply and Ambient Temperatures . 66
A.5.1 General . 66
A.5.2 Power Sources . 66
A.5.2.1 Power Sources for Stand-Alone Equipment . 66
A.5.2.2 Power sources for plug-in radio devices . 67
A.5.3 Normal and Extreme Test Conditions . 67
A.5.3.1 Normal Test Conditions . 67
A.5.3.1.1 Normal Temperature and Humidity . 67
A.5.3.1.2 Normal Power Source . 67
A.5.3.1.2.1 Mains Voltage . 67
A.5.3.1.2.2 Lead-Acid Battery Power Sources used on Vehicles . 67
A.5.3.1.2.3 Other Power Sources . 67
A.5.3.2 Extreme Conditions . 67
A.5.3.2.1 Extreme Temperatures . 67
A.5.3.2.1.1 Procedure for Tests at Extreme Temperatures . 67
A.5.3.2.1.2 Extreme Temperature Ranges . 68
A.5.3.2.2 Extreme Test Source Voltages . 68
A.5.3.2.2.1 Mains Voltage . 68
A.5.3.2.2.2 Other Power Sources . 68
A.5.3.2.3 Radio Transparent Temperature Chamber . 68
A.5.3.2.4 Use of a Test Fixture . 68
A.5.3.2.4.1 General . 68
A.5.3.2.4.2 Characteristics . 69
A.5.3.2.4.3 Validation of the Test Fixture in the Temperature Chamber . 70
A.5.3.2.4.4 Use of the Test Fixture for Measurement in the Temperature Chamber . 71
A.6 Choice of Equipment for Test Suites . 71
A.6.1 Choice of Model . 71
A.6.2 Presentation . 71
A.7 Testing of Host Connected Equipment and Plug-In Radio Devices . 71
A.7.1 General . 71
A.7.2 The Use of a Host or Test Fixture for Testing Plug-In Radio Devices . 72
A.8 Interpretation of the measurement results . 72
A.8.1 General points on interpretation of the measurement results . 72
A.8.2 Measurement uncertainty is equal to or less than maximum acceptable uncertainty . 73
A.8.3 Measurement uncertainty is greater than maximum acceptable uncertainty . 73
Annex B (normative): Test setups . 74
B.1 Introduction . 74
B.2 Radiated measurements . 74
B.2.1 General . 74
B.2.2 Test Sites and General Arrangements for Measurements Involving the Use of Radiated Fields . 74
B.2.2.1 General . 74
B.2.2.2 Anechoic Chamber . 75
B.2.2.3 Anechoic Chamber with a Conductive Ground Plane . 76
B.2.2.4 Open Area Test Site (OATS) . 77
B.2.2.5 Test Antenna . 78
B.2.2.6 Substitution Antenna. 78
B.2.2.7 Measuring Antenna . 79
B.2.2.8 Minimum Requirements for Test Sites for Measurements above 18 GHz . 79
B.2.3 Guidance on the Use of a Radiation Test Site . 80
B.2.3.1 General on Guidance on the Use of a Radiation Test Site . 80
ETSI
6 ETSI EN 303 883-1 V1.2.1 (2021-02)
B.2.3.2 Verification of the Test Site . 80
B.2.3.3 Preparation of the EUT . 80
B.2.3.4 Power Supplies to the EUT . 81
B.2.3.5 Range Length . 81
B.2.3.5.1 General . 81
B.2.3.5.2 Practical Test Distances for Accurate Measurements . 81
B.2.3.6 Site Preparation . 82
B.2.4 Coupling of Signals . 82
B.2.4.1 General . 82
B.2.4.2 Data Signals . 83
B.2.5 Standard Radiated Test Methods . 83
B.2.5.0 Initial Measurement Steps . 83
B.2.5.1 General Information on Test Methods . 83
B.2.5.2 Calibrated Setup . 83
B.2.5.3 Substitution Method . 84
B.2.6 Standard calibration method . 84
B.3 Conducted Measurements . 86
B.4 Detailed Information to Standard Test Methods . 87
B.4.1 Spherical Scan with Automatic Test Antenna Placement . 87
B.4.1.1 General . 87
B.4.1.2 Calibrated Setup . 88
B.4.1.3 Substitution Method . 89
B.4.1.4 Spherical Scan with Rotating EUT . 89
B.4.1.4.1 General . 89
B.4.1.4.2 Calibrated Setup . 90
B.4.1.4.3 Substitution Method . 90
B.4.1.5 Spherical Scan Other Methods. 91
Annex C (normative): Signal Repetition Time . 92
C.1 Definitions . 92
C.2 Signal Types . 92
C.2.1 Pulsed signals . 92
C.2.2 FMCW signals, Stepped/Hopping Frequency Signals and Similar . 93
C.3 Measurement procedure for time parameters . 94
Annex D (normative): All Emission Measurement . 95
D.1 General . 95
D.2 First step . 95
D.3 Second step . 97
Annex E (normative): Guidance for a pre-scan of EUT operating frequency range(s) . 98
Annex F (informative): Measurement of peak e.i.r.p. and mean (average) e.i.r.p. of constant
duty cycle wideband pulsed signals . 99
F.1 General . 99
F.2 Exemplary measurement of pulse signals . 99
F.3 Mean e.i.r.p. measurements . 100
F.3.1 General . 100
F.3.2 Method I: Zero span mode . 100
F.3.3 Method II: Channel power measurement . 101
F.3.4 Method III: Average power meters . 102
F.4 Peak e.i.r.p. measurements . 102
F.4.1 General . 102
F.4.2 Method I: Zero span mode - direct measurement . 102
F.4.3 Method II: Peak e.i.r.p. calculation . 103
ETSI
7 ETSI EN 303 883-1 V1.2.1 (2021-02)
F.5 Max and mean PSD . 104
Annex G (informative): Change History . 106
History . 107

ETSI
8 ETSI EN 303 883-1 V1.2.1 (2021-02)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
Foreword
This European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic compatibility and
Radio spectrum Matters (ERM).
The present document is part 1 of a multi-part deliverable covering Short Range Devices (SRD) and Ultra Wide Band
(UWB), as identified below:
Part 1: "Measurement techniques for transmitter requirements";
Part 2: "Measurement techniques for receiver requirements".

National transposition dates
Date of adoption of this EN: 22 February 2021
Date of latest announcement of this EN (doa): 31 May 2021
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 November 2021
Date of withdrawal of any conflicting National Standard (dow): 30 November 2021

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
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9 ETSI EN 303 883-1 V1.2.1 (2021-02)
Introduction
Ultra Wide Band (UWB) radio technology enables a new generation of high-speed data devices for short-range
communication purposes as well as location tracking and Sensor devices and opens new markets with a variety of
innovative applications.
UWB devices may form an integral part of other portable electronic equipment such as future generation cellular
phones or laptops equipped with UWB enabled short-range air interfaces.
In addition, UWB devices with an operating frequency range of several hundreds of MHz up to several GHz allow tens
of centimetre-level accuracy real time localization and positioning even in the presence of severe multipath effects
caused by walls, furniture or any other harsh radio propagation environments.
Based on the broad variety of different applications and the broad possible frequency range of operation the number of
possible deployed physical signal formats can be very large. The existing range of physical signal and modulation
formats range from traditional carrier based systems like OFDM over spread spectrum based system to carrier less
systems based on base band pulses. The frequency regulation on the other side only defines a single set of transmission
limits and values, which have to be fulfilled by all systems under the UWB regulation. Furthermore, the very high
channel bandwidth of a UWB signal gives a specific challenge to the needed measurement setup and the procedures.
Existing measurement methods need to be extended and new possible techniques should be described in the present
document.
The present document is structured as follows:
• Clauses 1 through 3 provide a general description on the types of equipment covered by the present document
and the definition of terms, symbols and abbreviations used.
• Clause 4 provides on overview on the technical and technology basics which were considered during the
preparation of the present document.
• Clause 5 specifies EUT TX requirements and the related conformance procedure.
• Annex A provides information on test conditions, used test sites and procedures.
• Annex B provides necessary information on radiated test procedures.
• Annex C provides information on TX signal types.
• Annex D provides information on the all emission concept.
• Annex E provides information for a pre-scan radiated power measurement test procedure.
• Annex F provides information on differences between the different emission power measurements.
• Annex G provides a change history table containing the major technical changes.

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10 ETSI EN 303 883-1 V1.2.1 (2021-02)
1 Scope
The present document summarizes the available information of possible measurement techniques and procedures for the
conformance measurement of various signal formats (e.g. Ultra Wide Band) in order to comply with the given
transmission limits given in the current regulation.
The present document could be used as a reference for existing and future ETSI standards covering UWB and other
technologies.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference/.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] ETSI TS 102 754: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Short
Range Devices (SRD); Technical characteristics of Detect And
...