SIST EN 303 851 V1.1.1:2025

HARMONISED EUROPEAN STANDARD
Radio Frequency Identification;
Equipment operating in the band 2 446 MHz to 2 454 MHz
with power levels up to a maximum of 500 mW e.i.r.p.
and up to a maximum of 4 W e.i.r.p.;
Harmonised Standard for access to radio spectrum

2 ETSI EN 303 851 V1.1.1 (2025-04)

Reference
DEN/ERM-TG34-269
Keywords
harmonised standard, radio, SRD, testing
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 - APE 7112B
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° w061004871

Important notice
The present document can be downloaded from the
ETSI Search & Browse Standards application.
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 on ETSI deliver repository.
Users should be aware that the present document may be revised or have its status changed,
this information is available in the Milestones listing.
If you find errors in the present document, please send your comments to
the relevant service listed under Committee Support Staff.
If you find a security vulnerability in the present document, please report it through our
Coordinated Vulnerability Disclosure (CVD) program.
Notice of disclaimer & limitation of liability
The information provided in the present deliverable is directed solely to professionals who have the appropriate degree of
experience to understand and interpret its content in accordance with generally accepted engineering or
other professional standard and applicable regulations.
No recommendation as to products and services or vendors is made or should be implied.
In no event shall ETSI be held liable for loss of profits or any other incidental or consequential damages.

Any software contained in this deliverable is provided "AS IS" with no warranties, express or implied, including but not
limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement of intellectual property
rights and ETSI shall not be held liable in any event for any damages whatsoever (including, without limitation, damages
for loss of profits, business interruption, loss of information, or any other pecuniary loss) arising out of or related to the use
of or inability to use the software.
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 2025.
All rights reserved.
ETSI
3 ETSI EN 303 851 V1.1.1 (2025-04)
Contents
Intellectual Property Rights . 8
Foreword . 8
Modal verbs terminology . 9
1 Scope . 10
2 References . 10
2.1 Normative references . 10
2.2 Informative references . 10
3 Definition of terms, symbols and abbreviations . 11
3.1 Terms . 11
3.2 Symbols . 13
3.3 Abbreviations . 13
4 Technical requirements specifications . 14
4.0 General . 14
4.1 Environmental profile . 14
4.2 General conditions for operating . 14
4.2.1 Conformance requirements . 14
4.2.2 Designated frequencies . 14
4.2.2.1 EU wide harmonised national radio interface 2 446 MHz to 2 454 MHz . 14
4.2.2.2 National Radio Interfaces not EU wide harmonised from 2 446 MHz to 2 454 MHz . 15
4.2.3 Operating conditions . 15
4.3 Transmitter requirements . 16
4.3.1 Transmitter measurement requirements . 16
4.3.1.1 Applicability. 16
4.3.1.2 Methods of measurement and limits for transmitter parameters . 16
4.3.2 Equivalent isotropically radiated power (e.i.r.p.) . 16
4.3.2.1 Indoor and outdoor transmitters of 500 mW or less . 16
4.3.2.1.1 Applicability . 16
4.3.2.1.2 Definition. 16
4.3.2.1.3 Limits . 17
4.3.2.1.4 Conformance . 17
4.3.2.2 Indoor transmitters of 4 W or less . 17
4.3.2.2.1 Applicability . 17
4.3.2.2.2 Definition. 17
4.3.2.2.3 Limits . 18
4.3.2.2.4 Conformance . 18
4.3.3 Permitted range of operating frequencies . 18
4.3.3.1 Applicability. 18
4.3.3.2 Definition . 18
4.3.3.3 Limits . 18
4.3.3.4 Conformance . 18
4.3.4 Transmitter spectrum masks . 18
4.3.4.1 Applicability. 18
4.3.4.2 Definition . 19
4.3.4.3 Limits . 19
4.3.4.4 Conformance . 19
4.3.5 Unwanted emissions in the spurious domain . 19
4.3.5.1 Applicability. 19
4.3.5.2 Definition . 19
4.3.5.3 Limits . 19
4.3.5.4 Conformance . 20
4.3.6 Duty cycle . 20
4.3.6.1 Applicability. 20
4.3.6.2 Definition . 20
4.3.6.3 Limits . 20
ETSI
4 ETSI EN 303 851 V1.1.1 (2025-04)
4.3.6.4 Conformance . 20
4.3.7 Additional requirements for FHSS equipment . 21
4.3.7.1 Applicability. 21
4.3.7.2 Definition . 21
4.3.7.3 Limits . 21
4.3.7.4 Conformance . 21
4.4 Receiver requirements . 21
4.4.1 General performance criteria . 21
4.4.2 Blocking or desensitization . 21
4.4.2.1 Applicability. 21
4.4.2.2 Definition . 21
4.4.2.3 Limits . 21
4.4.2.4 Conformance . 22
4.4.3 Spurious radiations . 22
4.4.3.1 Applicability. 22
4.4.3.2 Definition . 22
4.4.3.3 Limits . 22
4.4.3.4 Conformance . 22
4.4.4 Receiver sensitivity . 22
4.4.4.1 Applicability. 22
4.4.4.2 Definition . 22
4.4.4.3 Limits . 22
4.4.4.4 Conformance . 22
4.4.5 Adjacent channel selectivity . 23
4.4.5.1 Applicability. 23
4.4.5.2 Definition . 23
4.4.5.3 Limits . 23
4.4.5.4 Conformance . 23
4.4.6 Receiver spurious response rejection . 23
4.4.6.1 Applicability. 23
4.4.6.2 Definition . 23
4.4.6.3 Limits . 23
4.4.6.4 Conformance . 23
4.4.7 Receiver maximum input signal level . 23
4.4.7.1 Applicability. 23
4.4.7.2 Definition . 23
4.4.7.3 Limits . 24
4.4.7.4 Conformance . 24
5 Testing for compliance with technical requirements . 24
5.0 General . 24
5.1 Environmental conditions for testing . 24
5.2 Presentation of equipment for testing purposes . 24
5.2.1 General . 24
5.2.2 Choice of model for testing . 24
5.2.3 Testing of equipment with alternative power levels . 25
5.2.4 Testing of equipment that does not have an external 50 Ω RF connector (integral antenna
equipment) . 25
5.2.4.1 Equipment with an internal permanent or temporary antenna connector or using a dedicated test
fixture . 25
5.2.4.2 Equipment with a temporary antenna connector . 25
5.2.5 Testing of devices using duty cycle . 25
5.3 Mechanical and electrical design . 25
5.3.1 General . 25
5.3.2 Transmitter shut-off facility . 26
5.3.3 Receiver mute or squelch . 26
5.4 Auxiliary test equipment . 26
5.5 Test power source . 26
5.5.1 General . 26
5.5.2 External test power source . 26
5.5.3 Internal test power source . 26
5.6 Normal test conditions . 27
ETSI
5 ETSI EN 303 851 V1.1.1 (2025-04)
5.6.1 Normal temperature and humidity . 27
5.6.2 Normal test power source . 27
5.6.2.1 Mains voltage . 27
5.6.2.2 Battery power sources . 27
5.6.2.3 Other power sources . 27
5.7 Extreme test conditions . 27
5.7.1 Extreme temperatures . 27
5.7.1.1 Procedure for tests at extreme temperatures . 27
5.7.1.1.1 General . 27
5.7.1.1.2 Procedure for equipment designed for continuous operation . 28
5.7.1.1.3 Procedure for equipment designed for intermittent operation . 28
5.7.1.2 Extreme temperature ranges . 28
5.7.2 Extreme test source voltages . 28
5.7.2.1 Mains voltage . 28
5.7.2.2 Battery power sources . 28
5.7.2.3 Power sources using other types of batteries . 29
5.7.2.4 Other power sources . 29
5.8 General conditions . 29
5.8.1 Normal test signals and test modulation . 29
5.8.1.1 General . 29
5.8.1.2 Normal test signals for data . 30
5.8.2 Artificial antenna . 30
5.8.3 Test fixture . 30
5.8.3.1 General . 30
5.8.3.2 Validation of the test-fixture in the temperature chamber . 31
5.8.3.3 Mode of use . 33
5.8.4 Test sites and general arrangements for radiated measurements . 33
5.8.5 Measuring receiver . 33
5.9 Transmitter requirements . 33
5.9.1 Transmitter measurement requirements . 33
5.9.1.1 Methods of measurement and limits for transmitter parameters . 33
5.9.2 Equivalent isotropically radiated power (e.i.r.p.) . 34
5.9.2.1 Method of measurement . 34
5.9.2.1.1 General requirements . 34
5.9.2.1.2 Non spread spectrum transmitters with a -6 dB bandwidth of up to 20 MHz and spread
spectrum transmitters with channel bandwidth of up to 1 MHz . 34
5.9.2.1.3 Transmitters other than those defined in clause 5.9.2.1.2 . 35
5.9.2.1.4 Tests for indoor transmitters of 4 W . 36
5.9.3 Permitted range of operating frequencies . 36
5.9.3.1 Method of measurement . 36
5.9.3.2 Method of measurement for equipment using FHSS modulation . 37
5.9.4 Transmitter spectrum mask . 37
5.9.4.1 Method of measurement . 37
5.9.5 Unwanted emissions in the spurious domain . 38
5.9.5.1 Method of measurement . 38
5.9.5.1.1 General Requirements . 38
5.9.5.1.2 Conducted spurious emission . 39
5.9.5.1.3 Method of measurement - cabinet spurious radiation . 39
5.9.5.1.4 Method of measurement - radiated spurious emission . 40
5.9.5.1.5 Additional requirements for equipment employing FHSS modulation . 41
5.9.6 Duty cycle . 41
5.9.6.1 Method of measurement . 41
5.9.7 Additional requirements for FHSS equipment . 41
5.9.7.1 Method of measurement . 41
5.9.7.1.0 General . 41
5.9.7.1.1 Total number of hops and maximum separation of hops . 41
5.9.7.1.2 Dwell time . 42
5.10 Receiver requirements . 42
5.10.1 General performance criteria . 42
5.10.2 Blocking or desensitization . 42
5.10.2.1 Method of measurement . 42
5.10.2.2 Method of measurement for blocking or desensitization . 42
ETSI
6 ETSI EN 303 851 V1.1.1 (2025-04)
5.10.2.2.1 Test Conditions . 42
5.10.2.2.2 Conducted measurement. 42
5.10.2.2.3 Radiated measurement . 43
5.10.2.2.4 Measurement procedure . 43
5.10.3 Spurious radiations . 43
5.10.3.1 Method of measurement for spurious radiation. 43
5.10.3.1.1 General Requirements . 43
5.10.3.1.2 Method of measurement conducted spurious components . 44
5.10.3.1.3 Method of measurement cabinet radiation. 44
5.10.3.1.4 Method of measurement radiated spurious components . 45
5.10.4 Receiver sensitivity . 45
5.10.4.1 Method of measurement for receiver sensitivity . 45
5.10.4.1.1 Test Conditions . 45
5.10.4.1.2 Method of measurement conducted receiver sensitivity . 45
5.10.4.1.3 Method of measurement radiated receiver sensitivity . 45
5.10.4.1.4 Measurement procedure . 45
5.10.5 Adjacent channel selectivity . 46
5.10.5.1 Method of measurement for adjacent channel selectivity . 46
5.10.5.1.1 Test conditions . 46
5.10.5.1.2 Conducted measurement. 46
5.10.5.1.3 Radiated measurement . 46
5.10.5.1.4 Measurement procedure . 46
5.10.6 Receiver spurious response rejection . 47
5.10.6.1 Method of measurement for receiver spurious response rejection . 47
5.10.6.1.1 Test conditions . 47
5.10.6.1.2 Conducted measurement. 47
5.10.6.1.3 Radiated measurement . 47
5.10.6.1.4 Measurement procedure . 48
5.10.7 Receiver maximum input signal level . 48
5.10.7.1 Method of measurement for receiver maximum input signal level . 48
5.10.7.1.1 Test conditions . 48
5.10.7.1.2 Conducted measurement. 48
5.10.7.1.3 Radiated measurement . 48
5.10.7.1.4 Measurement procedure . 49
Annex A (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 50
Annex B (informative): Selection of technical parameters . 52
B.1 Introduction . 52
Annex C (normative): Radiated measurements . 53
C.1 General requirements for measurements involving the use of radiated fields. 53
C.2 Test Sites . 53
C.2.0 General . 53
C.2.1 Indoor test site . 54
C.2.2 Shielded anechoic test site . 55
C.2.2.0 General . 55
C.2.2.1 Influence of parasitic reflections in anechoic chambers . 55
C.2.2.2 Calibration of the shielded RF anechoic chamber . 55
C.3 Antennas . 58
C.3.1 Test antenna . 58
C.3.2 Substitution antenna . 58
C.3.3 Artificial antenna . 58
C.4 Test Practice and Auxiliary Test Equipment . 59
C.5 Measuring distance . 59
C.5.0 General . 59
C.5.1 Standard position . 59
ETSI
7 ETSI EN 303 851 V1.1.1 (2025-04)
C.5.2 Auxiliary cables . 59
Annex D (normative): General description of measurement methods . 60
D.0 General . 60
D.1 Conducted measurements . 60
D.2 Radiated measurements . 60
D.3 Radiated measurement for receivers . 61
Annex E (informative): Example of implementation for restriction of 4 W RFID to
in-building use only . 62
Annex F (informative): Selection of receiver parameters. 64
F.0 Introduction . 64
F.1 Receiver sensitivity . 64
F.2 Receiver co-channel rejection . 64
F.3 Receiver adjacent signal selectivity . 64
F.4 Receiver spurious response rejection . 64
F.5 Receiver blocking . 64
F.6 Receiver radio-frequency intermodulation . 65
F.7 Receiver dynamic range . 65
F.8 Desensitization . 65
F.9 Receiver unwanted emissions in the spurious domain . 65
Annex G (informative): Interpretation of the measurement results . 66
Annex H (informative): Change history . 67
History . 68

ETSI
8 ETSI EN 303 851 V1.1.1 (2025-04)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are 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 IPR online database.
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
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.
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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.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its
Members. 3GPP™, LTE™ and 5G™ logo are trademarks of ETSI registered for the benefit of its Members and of the
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Foreword
This Harmonised European Standard (EN) has been produced by ETSI T
...

SLOVENSKI STANDARD
01-junij-2025
Radiofrekvenčna identifikacija - Oprema, ki deluje v pasu od 2446 MHz do 2454
MHz z močjo do največ 500 mW e.i.r.p. in do največ 4 W e.i.r.p - Harmonizirani
standard za dostop do radijskega spektra
Radio Frequency Identification - Equipment operating in the band 2 446 MHz to 2 454
MHz with power levels up to a maximum of 500 mW e.i.r.p. and up to a maximum of 4 W
e.i.r.p. - Harmonised Standard for access to radio spectrum
Ta slovenski standard je istoveten z: ETSI EN 303 851 V1.1.1 (2025-04)
ICS:
33.060.01 Radijske komunikacije na Radiocommunications in
splošno general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

HARMONISED EUROPEAN STANDARD
Radio Frequency Identification;
Equipment operating in the band 2 446 MHz to 2 454 MHz
with power levels up to a maximum of 500 mW e.i.r.p.
and up to a maximum of 4 W e.i.r.p.;
Harmonised Standard for access to radio spectrum

2 ETSI EN 303 851 V1.1.1 (2025-04)

Reference
DEN/ERM-TG34-269
Keywords
harmonised standard, radio, SRD, testing
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 - APE 7112B
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° w061004871

Important notice
The present document can be downloaded from the
ETSI Search & Browse Standards application.
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 on ETSI deliver repository.
Users should be aware that the present document may be revised or have its status changed,
this information is available in the Milestones listing.
If you find errors in the present document, please send your comments to
the relevant service listed under Committee Support Staff.
If you find a security vulnerability in the present document, please report it through our
Coordinated Vulnerability Disclosure (CVD) program.
Notice of disclaimer & limitation of liability
The information provided in the present deliverable is directed solely to professionals who have the appropriate degree of
experience to understand and interpret its content in accordance with generally accepted engineering or
other professional standard and applicable regulations.
No recommendation as to products and services or vendors is made or should be implied.
In no event shall ETSI be held liable for loss of profits or any other incidental or consequential damages.

Any software contained in this deliverable is provided "AS IS" with no warranties, express or implied, including but not
limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement of intellectual property
rights and ETSI shall not be held liable in any event for any damages whatsoever (including, without limitation, damages
for loss of profits, business interruption, loss of information, or any other pecuniary loss) arising out of or related to the use
of or inability to use the software.
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 2025.
All rights reserved.
ETSI
3 ETSI EN 303 851 V1.1.1 (2025-04)
Contents
Intellectual Property Rights . 8
Foreword . 8
Modal verbs terminology . 9
1 Scope . 10
2 References . 10
2.1 Normative references . 10
2.2 Informative references . 10
3 Definition of terms, symbols and abbreviations . 11
3.1 Terms . 11
3.2 Symbols . 13
3.3 Abbreviations . 13
4 Technical requirements specifications . 14
4.0 General . 14
4.1 Environmental profile . 14
4.2 General conditions for operating . 14
4.2.1 Conformance requirements . 14
4.2.2 Designated frequencies . 14
4.2.2.1 EU wide harmonised national radio interface 2 446 MHz to 2 454 MHz . 14
4.2.2.2 National Radio Interfaces not EU wide harmonised from 2 446 MHz to 2 454 MHz . 15
4.2.3 Operating conditions . 15
4.3 Transmitter requirements . 16
4.3.1 Transmitter measurement requirements . 16
4.3.1.1 Applicability. 16
4.3.1.2 Methods of measurement and limits for transmitter parameters . 16
4.3.2 Equivalent isotropically radiated power (e.i.r.p.) . 16
4.3.2.1 Indoor and outdoor transmitters of 500 mW or less . 16
4.3.2.1.1 Applicability . 16
4.3.2.1.2 Definition. 16
4.3.2.1.3 Limits . 17
4.3.2.1.4 Conformance . 17
4.3.2.2 Indoor transmitters of 4 W or less . 17
4.3.2.2.1 Applicability . 17
4.3.2.2.2 Definition. 17
4.3.2.2.3 Limits . 18
4.3.2.2.4 Conformance . 18
4.3.3 Permitted range of operating frequencies . 18
4.3.3.1 Applicability. 18
4.3.3.2 Definition . 18
4.3.3.3 Limits . 18
4.3.3.4 Conformance . 18
4.3.4 Transmitter spectrum masks . 18
4.3.4.1 Applicability. 18
4.3.4.2 Definition . 19
4.3.4.3 Limits . 19
4.3.4.4 Conformance . 19
4.3.5 Unwanted emissions in the spurious domain . 19
4.3.5.1 Applicability. 19
4.3.5.2 Definition . 19
4.3.5.3 Limits . 19
4.3.5.4 Conformance . 20
4.3.6 Duty cycle . 20
4.3.6.1 Applicability. 20
4.3.6.2 Definition . 20
4.3.6.3 Limits . 20
ETSI
4 ETSI EN 303 851 V1.1.1 (2025-04)
4.3.6.4 Conformance . 20
4.3.7 Additional requirements for FHSS equipment . 21
4.3.7.1 Applicability. 21
4.3.7.2 Definition . 21
4.3.7.3 Limits . 21
4.3.7.4 Conformance . 21
4.4 Receiver requirements . 21
4.4.1 General performance criteria . 21
4.4.2 Blocking or desensitization . 21
4.4.2.1 Applicability. 21
4.4.2.2 Definition . 21
4.4.2.3 Limits . 21
4.4.2.4 Conformance . 22
4.4.3 Spurious radiations . 22
4.4.3.1 Applicability. 22
4.4.3.2 Definition . 22
4.4.3.3 Limits . 22
4.4.3.4 Conformance . 22
4.4.4 Receiver sensitivity . 22
4.4.4.1 Applicability. 22
4.4.4.2 Definition . 22
4.4.4.3 Limits . 22
4.4.4.4 Conformance . 22
4.4.5 Adjacent channel selectivity . 23
4.4.5.1 Applicability. 23
4.4.5.2 Definition . 23
4.4.5.3 Limits . 23
4.4.5.4 Conformance . 23
4.4.6 Receiver spurious response rejection . 23
4.4.6.1 Applicability. 23
4.4.6.2 Definition . 23
4.4.6.3 Limits . 23
4.4.6.4 Conformance . 23
4.4.7 Receiver maximum input signal level . 23
4.4.7.1 Applicability. 23
4.4.7.2 Definition . 23
4.4.7.3 Limits . 24
4.4.7.4 Conformance . 24
5 Testing for compliance with technical requirements . 24
5.0 General . 24
5.1 Environmental conditions for testing . 24
5.2 Presentation of equipment for testing purposes . 24
5.2.1 General . 24
5.2.2 Choice of model for testing . 24
5.2.3 Testing of equipment with alternative power levels . 25
5.2.4 Testing of equipment that does not have an external 50 Ω RF connector (integral antenna
equipment) . 25
5.2.4.1 Equipment with an internal permanent or temporary antenna connector or using a dedicated test
fixture . 25
5.2.4.2 Equipment with a temporary antenna connector . 25
5.2.5 Testing of devices using duty cycle . 25
5.3 Mechanical and electrical design . 25
5.3.1 General . 25
5.3.2 Transmitter shut-off facility . 26
5.3.3 Receiver mute or squelch . 26
5.4 Auxiliary test equipment . 26
5.5 Test power source . 26
5.5.1 General . 26
5.5.2 External test power source . 26
5.5.3 Internal test power source . 26
5.6 Normal test conditions . 27
ETSI
5 ETSI EN 303 851 V1.1.1 (2025-04)
5.6.1 Normal temperature and humidity . 27
5.6.2 Normal test power source . 27
5.6.2.1 Mains voltage . 27
5.6.2.2 Battery power sources . 27
5.6.2.3 Other power sources . 27
5.7 Extreme test conditions . 27
5.7.1 Extreme temperatures . 27
5.7.1.1 Procedure for tests at extreme temperatures . 27
5.7.1.1.1 General . 27
5.7.1.1.2 Procedure for equipment designed for continuous operation . 28
5.7.1.1.3 Procedure for equipment designed for intermittent operation . 28
5.7.1.2 Extreme temperature ranges . 28
5.7.2 Extreme test source voltages . 28
5.7.2.1 Mains voltage . 28
5.7.2.2 Battery power sources . 28
5.7.2.3 Power sources using other types of batteries . 29
5.7.2.4 Other power sources . 29
5.8 General conditions . 29
5.8.1 Normal test signals and test modulation . 29
5.8.1.1 General . 29
5.8.1.2 Normal test signals for data . 30
5.8.2 Artificial antenna . 30
5.8.3 Test fixture . 30
5.8.3.1 General . 30
5.8.3.2 Validation of the test-fixture in the temperature chamber . 31
5.8.3.3 Mode of use . 33
5.8.4 Test sites and general arrangements for radiated measurements . 33
5.8.5 Measuring receiver . 33
5.9 Transmitter requirements . 33
5.9.1 Transmitter measurement requirements . 33
5.9.1.1 Methods of measurement and limits for transmitter parameters . 33
5.9.2 Equivalent isotropically radiated power (e.i.r.p.) . 34
5.9.2.1 Method of measurement . 34
5.9.2.1.1 General requirements . 34
5.9.2.1.2 Non spread spectrum transmitters with a -6 dB bandwidth of up to 20 MHz and spread
spectrum transmitters with channel bandwidth of up to 1 MHz . 34
5.9.2.1.3 Transmitters other than those defined in clause 5.9.2.1.2 . 35
5.9.2.1.4 Tests for indoor transmitters of 4 W . 36
5.9.3 Permitted range of operating frequencies . 36
5.9.3.1 Method of measurement . 36
5.9.3.2 Method of measurement for equipment using FHSS modulation . 37
5.9.4 Transmitter spectrum mask . 37
5.9.4.1 Method of measurement . 37
5.9.5 Unwanted emissions in the spurious domain . 38
5.9.5.1 Method of measurement . 38
5.9.5.1.1 General Requirements . 38
5.9.5.1.2 Conducted spurious emission . 39
5.9.5.1.3 Method of measurement - cabinet spurious radiation . 39
5.9.5.1.4 Method of measurement - radiated spurious emission . 40
5.9.5.1.5 Additional requirements for equipment employing FHSS modulation . 41
5.9.6 Duty cycle . 41
5.9.6.1 Method of measurement . 41
5.9.7 Additional requirements for FHSS equipment . 41
5.9.7.1 Method of measurement . 41
5.9.7.1.0 General . 41
5.9.7.1.1 Total number of hops and maximum separation of hops . 41
5.9.7.1.2 Dwell time . 42
5.10 Receiver requirements . 42
5.10.1 General performance criteria . 42
5.10.2 Blocking or desensitization . 42
5.10.2.1 Method of measurement . 42
5.10.2.2 Method of measurement for blocking or desensitization . 42
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6 ETSI EN 303 851 V1.1.1 (2025-04)
5.10.2.2.1 Test Conditions . 42
5.10.2.2.2 Conducted measurement. 42
5.10.2.2.3 Radiated measurement . 43
5.10.2.2.4 Measurement procedure . 43
5.10.3 Spurious radiations . 43
5.10.3.1 Method of measurement for spurious radiation. 43
5.10.3.1.1 General Requirements . 43
5.10.3.1.2 Method of measurement conducted spurious components . 44
5.10.3.1.3 Method of measurement cabinet radiation. 44
5.10.3.1.4 Method of measurement radiated spurious components . 45
5.10.4 Receiver sensitivity . 45
5.10.4.1 Method of measurement for receiver sensitivity . 45
5.10.4.1.1 Test Conditions . 45
5.10.4.1.2 Method of measurement conducted receiver sensitivity . 45
5.10.4.1.3 Method of measurement radiated receiver sensitivity . 45
5.10.4.1.4 Measurement procedure . 45
5.10.5 Adjacent channel selectivity . 46
5.10.5.1 Method of measurement for adjacent channel selectivity . 46
5.10.5.1.1 Test conditions . 46
5.10.5.1.2 Conducted measurement. 46
5.10.5.1.3 Radiated measurement . 46
5.10.5.1.4 Measurement procedure . 46
5.10.6 Receiver spurious response rejection . 47
5.10.6.1 Method of measurement for receiver spurious response rejection . 47
5.10.6.1.1 Test conditions . 47
5.10.6.1.2 Conducted measurement. 47
5.10.6.1.3 Radiated measurement . 47
5.10.6.1.4 Measurement procedure . 48
5.10.7 Receiver maximum input signal level . 48
5.10.7.1 Method of measurement for receiver maximum input signal level . 48
5.10.7.1.1 Test conditions . 48
5.10.7.1.2 Conducted measurement. 48
5.10.7.1.3 Radiated measurement . 48
5.10.7.1.4 Measurement procedure . 49
Annex A (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 50
Annex B (informative): Selection of technical parameters . 52
B.1 Introduction . 52
Annex C (normative): Radiated measurements . 53
C.1 General requirements for measurements involving the use of radiated fields. 53
C.2 Test Sites . 53
C.2.0 General . 53
C.2.1 Indoor test site . 54
C.2.2 Shielded anechoic test site . 55
C.2.2.0 General . 55
C.2.2.1 Influence of parasitic reflections in anechoic chambers . 55
C.2.2.2 Calibration of the shielded RF anechoic chamber . 55
C.3 Antennas . 58
C.3.1 Test antenna . 58
C.3.2 Substitution antenna . 58
C.3.3 Artificial antenna . 58
C.4 Test Practice and Auxiliary Test Equipment . 59
C.5 Measuring distance . 59
C.5.0 General . 59
C.5.1 Standard position . 59
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7 ETSI EN 303 851 V1.1.1 (2025-04)
C.5.2 Auxiliary cables . 59
Annex D (normative): General description of measurement methods . 60
D.0 General . 60
D.1 Conducted measurements . 60
D.2 Radiated measurements . 60
D.3 Radiated measurement for receivers . 61
Annex E (informative): Example of implementation for restriction of 4 W RFID to
in-building use only . 62
Annex F (informative): Selection of receiver parameters. 64
F.0 Introduction . 64
F.1 Receiver sensitivity . 64
F.2 Receiver co-channel rejection . 64
F.3 Receiver adjacent signal selectivity . 64
F.4 Receiver spurious response rejection . 64
F.5 Receiver blocking . 64
F.6 Receiver radio-frequency intermodulation . 65
F.7 Receiver dynamic range . 65
F.8 Desensitization . 65
F.9 Receiver unwanted emissions in the spurious domain . 65
Annex G (informative): Interpretation of the measurement results . 66
Annex H (informative): Change history . 67
History . 68

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8 ETSI EN 303 851 V1.1.1 (2025-04)
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