Broadcast Sound Receivers - Part 2: AM broadcast sound service - Harmonised Standard for access to radio spectrum

The present document specifies technical characteristics and methods of measurements for broadcast sound receivers
with AM demodulation.
NOTE: The relationship between the present document and essential requirements of article 3.2 of Directive
2014/53/EU [i.1] is given in annex A.

Radiodifuzijski zvočni sprejemniki - 2. del: Radiodifuzijska zvočna storitev AM - Harmonizirani standard za dostop do radijskega spektra

Ta dokument določa tehnične lastnosti in merilne metode za radiodifuzijske zvočne sprejemnike z demodulacijo AM.
OPOMBA: Razmerje med tem dokumentom in bistvenimi zahtevami člena 3.2 Direktive 2014/53/EU [i.1] je podano v dodatku A.

General Information

Status
Published
Public Enquiry End Date
20-Dec-2021
Publication Date
05-Jan-2022
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
27-Dec-2021
Due Date
03-Mar-2022
Completion Date
06-Jan-2022

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SLOVENSKI STANDARD
SIST EN 303 345-2 V1.2.1:2022
01-februar-2022

Radiodifuzijski zvočni sprejemniki - 2. del: Radiodifuzijska zvočna storitev AM -

Harmonizirani standard za dostop do radijskega spektra
Broadcast Sound Receivers - Part 2: AM broadcast sound service - Harmonised
Standard for access to radio spectrum
Ta slovenski standard je istoveten z: ETSI EN 303 345-2 V1.2.1 (2021-12)
ICS:
33.060.20 Sprejemna in oddajna Receiving and transmitting
oprema equipment
SIST EN 303 345-2 V1.2.1:2022 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 303 345-2 V1.2.1:2022
---------------------- Page: 2 ----------------------
SIST EN 303 345-2 V1.2.1:2022
ETSI EN 303 345-2 V1.2.1 (2021-12)
HARMONISED EUROPEAN STANDARD
Broadcast Sound Receivers;
Part 2: AM broadcast sound service;
Harmonised Standard for access to radio spectrum
---------------------- Page: 3 ----------------------
SIST EN 303 345-2 V1.2.1:2022
2 ETSI EN 303 345-2 V1.2.1 (2021-12)
Reference
REN/ERM-TG17-156
Keywords
analogue, broadcast, harmonised standard, radio,
receiver
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:
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
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 2021.
All rights reserved.
ETSI
---------------------- Page: 4 ----------------------
SIST EN 303 345-2 V1.2.1:2022
3 ETSI EN 303 345-2 V1.2.1 (2021-12)
Contents

Intellectual Property Rights ................................................................................................................................ 5

Foreword ............................................................................................................................................................. 5

Modal verbs terminology .................................................................................................................................... 6

Introduction ........................................................................................................................................................ 6

1 Scope ........................................................................................................................................................ 7

2 References ................................................................................................................................................ 7

2.1 Normative references ......................................................................................................................................... 7

2.2 Informative references ........................................................................................................................................ 7

3 Definition of terms, symbols and abbreviations ....................................................................................... 8

3.1 Terms .................................................................................................................................................................. 8

3.2 Symbols .............................................................................................................................................................. 8

3.3 Abbreviations ..................................................................................................................................................... 8

4 Technical requirements specifications ..................................................................................................... 9

4.1 Test signal configurations .................................................................................................................................. 9

4.2 Sensitivity ......................................................................................................................................................... 10

4.2.1 Definition .................................................................................................................................................... 10

4.2.2 Limits .......................................................................................................................................................... 10

4.2.3 Conformance............................................................................................................................................... 11

4.3 Adjacent channel selectivity and blocking ....................................................................................................... 11

4.3.1 Definition .................................................................................................................................................... 11

4.3.2 Limits .......................................................................................................................................................... 11

4.3.3 Conformance............................................................................................................................................... 12

4.4 Unwanted emissions in the spurious domain.................................................................................................... 12

4.4.1 Definition .................................................................................................................................................... 12

4.4.2 Limits .......................................................................................................................................................... 12

4.4.3 Conformance............................................................................................................................................... 12

5 Testing for compliance with technical requirements .............................................................................. 13

5.1 Environmental conditions for testing ............................................................................................................... 13

Annex A (informative): Relationship between the present document and the essential

requirements of Directive 2014/53/EU ......................................................... 14

Annex B (informative): Test signal generation .................................................................................... 15

Annex C (informative): Development of the present document ......................................................... 17

C.1 Introduction ............................................................................................................................................ 17

C.2 Relevance ............................................................................................................................................... 17

C.3 Receiver parameters under article 3.2 .................................................................................................... 17

C.3.1 General ............................................................................................................................................................. 17

C.3.2 Receiver sensitivity .......................................................................................................................................... 17

C.3.3 Receiver co-channel rejection .......................................................................................................................... 18

C.3.4 Receiver selectivity .......................................................................................................................................... 18

C.3.4.1 General ........................................................................................................................................................ 18

C.3.4.2 Single signal selectivity .............................................................................................................................. 18

C.3.4.2.1 Receiver adjacent signal selectivity (adjacent channel selectivity) ....................................................... 18

C.3.4.2.2 Receiver spurious response rejection .................................................................................................... 18

C.3.4.3 Receiver multiple signal selectivity ............................................................................................................ 18

C.3.4.3.1 Receiver blocking ................................................................................................................................. 18

C.3.4.3.2 Receiver radio-frequency intermodulation ............................................................................................ 19

C.3.4.3.3 Receiver adjacent signal selectivity (adjacent channel selectivity) ....................................................... 19

C.3.4.4 Other receiver effects .................................................................................................................................. 19

ETSI
---------------------- Page: 5 ----------------------
SIST EN 303 345-2 V1.2.1:2022
4 ETSI EN 303 345-2 V1.2.1 (2021-12)

C.3.4.4.1 Receiver dynamic range ........................................................................................................................ 19

C.3.4.4.2 Reciprocal mixing ................................................................................................................................. 19

C.3.4.4.3 Desensitization ...................................................................................................................................... 19

C.3.5 Receiver unwanted emissions in the spurious domain ..................................................................................... 20

Annex D (informative): Change History .............................................................................................. 21

History .............................................................................................................................................................. 22

ETSI
---------------------- Page: 6 ----------------------
SIST EN 303 345-2 V1.2.1:2022
5 ETSI EN 303 345-2 V1.2.1 (2021-12)
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 Web server (https://ipr.etsi.org/).

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.
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.

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.

Foreword

This Harmonised European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic

compatibility and Radio spectrum Matters (ERM).

The present document has been prepared under the Commission's standardisation request C(2015) 5376 final [i.2] to

provide one voluntary means of conforming to the essential requirements of Directive 2014/53/EU on the harmonisation

of the laws of the Member States relating to the making available on the market of radio equipment and repealing

Directive 1999/5/EC [i.1].

Once the present document is cited in the Official Journal of the European Union under that Directive, compliance with

the normative clauses of the present document given in table A.1 confers, within the limits of the scope of the present

document, a presumption of conformity with the corresponding essential requirements of that Directive and associated

EFTA regulations.

The present document is part 2 of a multi-part deliverable. Full details of the entire series can be found in part 1 [1].

The present document has a number of test data files that are contained in archive en_30334501v010101p0.zip which

accompanies ETSI EN 303 345-1 [1].
National transposition dates
Date of adoption of this EN: 21 December 2021
Date of latest announcement of this EN (doa): 31 March 2022
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 September 2022
Date of withdrawal of any conflicting National Standard (dow): 30 September 2023
ETSI
---------------------- Page: 7 ----------------------
SIST EN 303 345-2 V1.2.1:2022
6 ETSI EN 303 345-2 V1.2.1 (2021-12)
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.

Introduction

The present document provides the necessary limits and conformance requirements for radio receivers to meet the

essential requirements of article 3.2 of Directive 2014/53/EU [i.1] for the AM sound broadcast service and is used with

reference to ETSI EN 303 345-1 [1], which describes the generic requirements and test methods.

ETSI
---------------------- Page: 8 ----------------------
SIST EN 303 345-2 V1.2.1:2022
7 ETSI EN 303 345-2 V1.2.1 (2021-12)
1 Scope

The present document specifies technical characteristics and methods of measurements for broadcast sound receivers

with AM demodulation.

NOTE: The relationship between the present document and essential requirements of article 3.2 of Directive

2014/53/EU [i.1] is given in annex A.
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 EN 303 345-1 (V1.1.1) (06-2019): "Broadcast Sound Receivers; Part 1: Generic

requirements and measuring methods".

[2] Recommendation ITU-R BS.468-4 (07-1986): "Measurement of audio-frequency noise voltage

level in sound broadcasting".

[3] Recommendation ITU-R BS.559-2 (06-1990): "Objective measurement of radio-frequency

protection ratios in LF, MF and HF broadcasting".

[4] EN 55032:2015: "Electromagnetic compatibility of multimedia equipment - Emission

Requirements", produced by CENELEC.
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] Directive 2014/53/EU of the European Parliament and of the Council of 16 April 2014 on the

harmonisation of the laws of the Member States relating to the making available on the market of

radio equipment and repealing Directive 1999/5/EC.

[i.2] Commission Implementing Decision C(2015) 5376 final of 4.8.2015 on a standardisation request

to the European Committee for Electrotechnical Standardisation and to the European

Telecommunications Standards Institute as regards radio equipment in support of Directive

2014/53/EU of the European Parliament and of the Council.
[i.3] Void.
[i.4] Void.
ETSI
---------------------- Page: 9 ----------------------
SIST EN 303 345-2 V1.2.1:2022
8 ETSI EN 303 345-2 V1.2.1 (2021-12)

[i.5] Recommendation ITU-R BS.1615-1: "Planning parameters for digital sound broadcasting at

frequencies below 30 MHz".

[i.6] AES17: "AES standard method for digital audio engineering - Measurement of digital audio

equipment".

[i.7] ETSI EG 203 336 (V1.1.1) (08-2015): "Electromagnetic compatibility and Radio spectrum

Matters (ERM); Guide for the selection of technical parameters for the production of Harmonised

Standards covering article 3.1(b) and article 3.2 of Directive 2014/53/EU".

[i.8] ITU GE75: "Final Acts of the Regional Administrative LF/MF Broadcasting Conference

(Regions 1 and 3)".

[i.9] Recommendation ITU-R BS.560-4 (10-1997): "Radio-frequency protection ratios in LF, MF and

HF broadcasting".
[i.10] Recommendation ITU-R SM.332-4 (07-1978): "Selectivity of Receivers".
3 Definition of terms, symbols and abbreviations
3.1 Terms

For the purposes of the present document, the terms given in Directive 2014/53/EU [i.1] and the following apply:

built-in antenna: antenna that cannot be detached from the equipment
crest factor: peak to rms voltage ratio

external antenna: antenna designed to be connected to the equipment with the use of a 50 Ω or 75 Ω external

connector

integral antenna: antenna which is detachable from the equipment without the use of any tools, and not using a 50 Ω

or 75 Ω external connector

NOTE: A device that uses a supplied earphone as the antenna has an integral antenna.

3.2 Symbols
For the purposes of the present document, the following symbols apply:
dBFS decibels relative to Full Scale in accordance with AES17 [i.6]
dBm decibels relative to 1 mW of power

dBQ audio decibels after Recommendation ITU-R BS.468-4 [2] noise weighting and a quasi-peak

detector have been applied
dBµV/m decibels relative to 1 µV/m
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ACS Adjacent Channel Selectivity
ADC Analogue to Digital Converter
AM Amplitude Modulation
BS Broadcast Sound
BW BandWidth
DDC Direct Digital Conversion
EFTA European Free Trade Association
EU European Union
HF High Frequency
ETSI
---------------------- Page: 10 ----------------------
SIST EN 303 345-2 V1.2.1:2022
9 ETSI EN 303 345-2 V1.2.1 (2021-12)
IQ In-phase and Quadrature
ITU-R International Telecommunications Union - Radiocommunications sector
LF Low Frequency
LO Local Oscillator
MF Medium Frequency
NZIF Near-Zero Intermediate Frequency
PC Personal Computer
RED Radio Equipment Directive
RF Radio Frequency
RMS Root Mean Square
SNR Signal to Noise Ratio
USB Universal Serial Bus
4 Technical requirements specifications
4.1 Test signal configurations

The generated AM signals (wanted, unwanted and blocking) shall be in accordance with table 1. The configuration is

based on Recommendation ITU-R BS.1615-1 [i.5].
Table 1: AM configuration
AM signals
Parameter
Wanted Unwanted Blocking
Audio modulation Weighted noise
Recommendation ITU-R
1 kHz tone BS.559-2 [3], clause 1, 1 kHz tone
band-limited to 4,5 kHz
(see note 1)
Other modulation 22,8 % RMS depth
40 % depth 80 % depth
parameters (see note 2)

NOTE 1: The filter shall have a cut-off frequency of 4,5 kHz and a minimum roll-off of 60 dB/octave.

NOTE 2: This is equivalent to a quasi-peak modulation depth of 50 %. The demodulated audio level will have the

same quasi-peak value as that of a carrier with 50 % AM modulation depth modulated with a 1 kHz sinusoid.

The means of generating the noise modulation for the "unwanted" signal is shown in figure 1.

ETSI
---------------------- Page: 11 ----------------------
SIST EN 303 345-2 V1.2.1:2022
10 ETSI EN 303 345-2 V1.2.1 (2021-12)
a) Hardware method
b) PC sound card method
c) Vector signal generator method

NOTE: In a), the low pass filter has a cut-off frequency of 4,5 kHz and a minimum roll-off of 60 dB/octave;

in b), the low pass filter has a cut-off frequency of 20 kHz and a minimum roll-off of 40 dB/octave.

Figure 1: Example arrangements for generating the unwanted signal

Waveform files to produce the signals using either the PC sound card method or the vector signal generator method are

contained in archive en_30334501v010101p0.zip which accompanies ETSI EN 303 345-1 [1]. For further details see

annex B.
4.2 Sensitivity
4.2.1 Definition

The receiver sensitivity is the minimum wanted signal level required to provide a given level of audio quality.

4.2.2 Limits

The limits for sensitivity specified in table 2 shall apply. Each figure quoted is the required level of wanted signal which

provides a given level of audio quality. The audio impairment criterion relevant for these tests is that the audio

SNR ≥ 22 dBQ ref 40 % AM.
Table 2: AM sensitivity requirements
De-modulation Tuned Wanted signal Required sensitivity limit
frequency centre Conducted Radiated
band frequency
(dBm) (dBμV/m)
(MHz)
(see note)
AM LF 0,216 -65 74
MF 0,999 -65 66
HF 9,650 -65 60

NOTE: If the receiver cannot be tuned to 9,650 MHz, the wanted signal centre frequency

shall be set to the closest alternate from the following list: 3,980 MHz, 6,050 MHz,

7,330 MHz, 11,850 MHz, 13,720 MHz, 15,450 MHz, 17,690 MHz, 18,960 MHz,
21,650 MHz, 25,890 MHz.
ETSI
---------------------- Page: 12 ----------------------
SIST EN 303 345-2 V1.2.1:2022
11 ETSI EN 303 345-2 V1.2.1 (2021-12)
4.2.3 Conformance

Conformance testing as defined in ETSI EN 303 345-1 [1], clause 5.3.4.1 shall be carried out for each frequency band

provided by the receiver. The wanted signal generator shall be set to produce a signal according to table 1 at the centre

frequency according to table 2. The required sensitivity level shall be as indicated in table 2. If the impairment criterion

given in clause 4.2.2 is met for all provided bands then the receiver has passed the sensitivity requirement.

NOTE: When measuring the AM power level, the carrier is unmodulated.
4.3 Adjacent channel selectivity and blocking
4.3.1 Definition

The adjacent channel selectivity is a measure of the capability of the receiver to receive a wanted modulated signal

without exceeding a given degradation due to the presence of an unwanted signal which differs in frequency from the

wanted signal by an amount equal to a small multiple of the adjacent channel spacing. The wanted and unwanted

signals are of the same modulation type.

The blocking ratio is a measure of the capability of the receiver to receive a wanted modulated signal without exceeding

a given degradation due to the presence of an unwanted input signal at a given frequency separation. The wanted and

unwanted signals are of the same modulation type.

In order to provide effective use of spectrum, devices shall be able to demodulate the tuned signal in the presence of

similar signals in adjacent channels. In addition, testing shall also be performed to check the ability of the receiver to

work effectively with interfering signals at a greater separation from the wanted signal (blocking).

The channel spacings specified in table 3 shall apply.
Table 3: Channel spacing for adjacent channel selectivity and blocking
Demodulation Tuned frequency Unwanted frequency Unwanted frequency
band (N = 1, 2, 3) (blocking)
AM LF ±N × 9 kHz ±90 kHz
MF ±N × 9 kHz ±90 kHz
HF ±N × 10 kHz ±100 kHz
4.3.2 Limits

The limits for selectivity and blocking specified in table 4 shall apply with the channel spacings given in table 3. Each

figure quoted is the minimum acceptable level of unwanted signal, relative to that of the wanted signal, which provides

a given level of audio quality. The audio impairment criteria relevant for these tests is that the audio SNR ≥ 22 dBQ ref

40 % AM.
ETSI
---------------------- Page: 13 ----------------------
SIST EN 303 345-2 V1.2.1:2022
12 ETSI EN 303 345-2 V1.2.1 (2021-12)
Table 4: Adjacent channel selectivity and blocking requirements
De- Tuned C C Required I/C ratio
modulation frequency Wanted Wanted signal level (see notes 2 and 3)
(see note 1) band signal centre Conducted Radiated N = 1 N = 2 N = 3 Blocking
frequency (dBm) (dBμV/m) (dB) (dB) (dB) (dB)
(MHz)
(see note 4)
AM (built-in or LF 0,216 n/a 80 -20 10 20 20
integral MF 0,999 n/a 72 -20 10 20 20
antenna)
HF 9,650 n/a 66 -20 10 20 20
AM (external LF 0,216 -59 n/a -5 25 35 40
antenna)
MF 0,999 -59 n/a -5 25 35 40
HF 9,650 -59 n/a -5 25 35 40

NOTE 1: The ACS and blocking requirements are currently separated into different limits for radiated and

conducted testing methods. These limits are likely to be unified in a future revision of the present

document. Users of the present document should consult frequently the latest list published in the Official

Journal of the European Union.

NOTE 2: The frequency of the interferer shall be calculated using the channel spacing data in table 3 for each of

the 6 defined adjacent channels N = {-3, -2, -1, +1, +2, +3} and the two blocking offsets. Each row of

table 4 thus defines 8 individual tests.

NOTE 3: The minimum level of I for the relevant level of impairment is calculated by adding the I/C ratio to the

wanted C level.

NOTE 4: If the receiver cannot be tuned to 9,650 MHz, the wanted signal centre frequency shall be set to the

closest alternate from the following list: 3,980 MHz, 6,050 MHz, 7,330 MHz, 11,850 MHz, 13,720 MHz,

15,450 MHz, 17,690 MHz, 18,960 MHz, 21,650 MHz, 25,890 MHz.
4.3.3 Conformance

Conformance testing as defined in ETSI EN 303 345-1 [1], clause 5.3.5.1 shall be carried out for each frequency band

provided by the receiver and for all eight frequency offsets specified in table 3.

The wanted and unwanted signal generators shall be set to produce signals according to table 1. The centre frequency of

the wanted signal is set according to table 4. The frequency offset of the unwanted or blocking signal to t

...

Draft ETSI EN 303 345-2 V1.2.0 (2021-09)
HARMONISED EUROPEAN STANDARD
Broadcast Sound Receivers;
Part 2: AM broadcast sound service;
Harmonised Standard for access to radio spectrum
---------------------- Page: 1 ----------------------
2 Draft ETSI EN 303 345-2 V1.2.0 (2021-09)
Reference
REN/ERM-TG17-156
Keywords
analogue, broadcast, harmonised standard, radio,
receiver
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:
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
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 2021.
All rights reserved.
ETSI
---------------------- Page: 2 ----------------------
3 Draft ETSI EN 303 345-2 V1.2.0 (2021-09)
Contents

Intellectual Property Rights ................................................................................................................................ 5

Foreword ............................................................................................................................................................. 5

Modal verbs terminology .................................................................................................................................... 6

Introduction ........................................................................................................................................................ 6

1 Scope ........................................................................................................................................................ 7

2 References ................................................................................................................................................ 7

2.1 Normative references ......................................................................................................................................... 7

2.2 Informative references ........................................................................................................................................ 7

3 Definition of terms, symbols and abbreviations ....................................................................................... 8

3.1 Terms .................................................................................................................................................................. 8

3.2 Symbols .............................................................................................................................................................. 8

3.3 Abbreviations ..................................................................................................................................................... 8

4 Technical requirements specifications ..................................................................................................... 9

4.1 Test signal configurations .................................................................................................................................. 9

4.2 Sensitivity ......................................................................................................................................................... 10

4.2.1 Definition .................................................................................................................................................... 10

4.2.2 Limits .......................................................................................................................................................... 10

4.2.3 Conformance............................................................................................................................................... 11

4.3 Adjacent channel selectivity and blocking ....................................................................................................... 11

4.3.1 Definition .................................................................................................................................................... 11

4.3.2 Limits .......................................................................................................................................................... 11

4.3.3 Conformance............................................................................................................................................... 12

4.4 Unwanted emissions in the spurious domain.................................................................................................... 12

4.4.1 Definition .................................................................................................................................................... 12

4.4.2 Limits .......................................................................................................................................................... 12

4.4.3 Conformance............................................................................................................................................... 12

5 Testing for compliance with technical requirements .............................................................................. 13

5.1 Environmental conditions for testing ............................................................................................................... 13

Annex A (informative): Relationship between the present document and the essential

requirements of Directive 2014/53/EU ......................................................... 14

Annex B (informative): Test signal generation .................................................................................... 15

Annex C (informative): Development of the present document ......................................................... 17

C.1 Introduction ............................................................................................................................................ 17

C.2 Relevance ............................................................................................................................................... 17

C.3 Receiver parameters under article 3.2 .................................................................................................... 17

C.3.1 General ............................................................................................................................................................. 17

C.3.2 Receiver sensitivity .......................................................................................................................................... 17

C.3.3 Receiver co-channel rejection .......................................................................................................................... 18

C.3.4 Receiver selectivity .......................................................................................................................................... 18

C.3.4.1 General ........................................................................................................................................................ 18

C.3.4.2 Single signal selectivity .............................................................................................................................. 18

C.3.4.2.1 Receiver adjacent signal selectivity (adjacent channel selectivity) ....................................................... 18

C.3.4.2.2 Receiver spurious response rejection .................................................................................................... 18

C.3.4.3 Receiver multiple signal selectivity ............................................................................................................ 18

C.3.4.3.1 Receiver blocking ................................................................................................................................. 18

C.3.4.3.2 Receiver radio-frequency intermodulation ............................................................................................ 19

C.3.4.3.3 Receiver adjacent signal selectivity (adjacent channel selectivity) ....................................................... 19

C.3.4.4 Other receiver effects .................................................................................................................................. 19

ETSI
---------------------- Page: 3 ----------------------
4 Draft ETSI EN 303 345-2 V1.2.0 (2021-09)

C.3.4.4.1 Receiver dynamic range ........................................................................................................................ 19

C.3.4.4.2 Reciprocal mixing ................................................................................................................................. 19

C.3.4.4.3 Desensitization ...................................................................................................................................... 19

C.3.5 Receiver unwanted emissions in the spurious domain ..................................................................................... 20

Annex D (informative): Change History .............................................................................................. 21

History .............................................................................................................................................................. 22

ETSI
---------------------- Page: 4 ----------------------
5 Draft ETSI EN 303 345-2 V1.2.0 (2021-09)
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 Web server (https://ipr.etsi.org/).

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.
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

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Foreword

This draft Harmonised European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic

compatibility and Radio spectrum Matters (ERM), and is now submitted for the combined Public Enquiry and Vote

phase of the ETSI standards EN Approval Procedure.

The present document has been prepared under the Commission's standardisation request C(2015) 5376 final [i.2] to

provide one voluntary means of conforming to the essential requirements of Directive 2014/53/EU on the harmonisation

of the laws of the Member States relating to the making available on the market of radio equipment and repealing

Directive 1999/5/EC [i.1].

Once the present document is cited in the Official Journal of the European Union under that Directive, compliance with

the normative clauses of the present document given in table A.1 confers, within the limits of the scope of the present

document, a presumption of conformity with the corresponding essential requirements of that Directive and associated

EFTA regulations.

The present document is part 2 of a multi-part deliverable. Full details of the entire series can be found in part 1 [1].

The present document has a number of test data files that are contained in archive en_30334501v010101p0.zip which

accompanies ETSI EN 303 345-1 [1].
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): 18 months after doa

ETSI
---------------------- Page: 5 ----------------------
6 Draft ETSI EN 303 345-2 V1.2.0 (2021-09)
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.

Introduction

The present document provides the necessary limits and conformance requirements for radio receivers to meet the

essential requirements of article 3.2 of Directive 2014/53/EU [i.1] for the AM sound broadcast service and is used with

reference to ETSI EN 303 345-1 [1], which describes the generic requirements and test methods.

ETSI
---------------------- Page: 6 ----------------------
7 Draft ETSI EN 303 345-2 V1.2.0 (2021-09)
1 Scope

The present document specifies technical characteristics and methods of measurements for broadcast sound receivers

with AM demodulation.

NOTE: The relationship between the present document and essential requirements of article 3.2 of Directive

2014/53/EU [i.1] is given in annex A.
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 EN 303 345-1 (V1.1.1) (06-2019): "Broadcast Sound Receivers; Part 1: Generic

requirements and measuring methods".

[2] Recommendation ITU-R BS.468-4 (07-1986): "Measurement of audio-frequency noise voltage

level in sound broadcasting".

[3] Recommendation ITU-R BS.559-2 (06-1990): "Objective measurement of radio-frequency

protection ratios in LF, MF and HF broadcasting".

[4] EN 55032:2015: "Electromagnetic compatibility of multimedia equipment - Emission

Requirements", produced by CENELEC.
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] Directive 2014/53/EU of the European Parliament and of the Council of 16 April 2014 on the

harmonisation of the laws of the Member States relating to the making available on the market of

radio equipment and repealing Directive 1999/5/EC.

[i.2] Commission Implementing Decision C(2015) 5376 final of 4.8.2015 on a standardisation request

to the European Committee for Electrotechnical Standardisation and to the European

Telecommunications Standards Institute as regards radio equipment in support of Directive

2014/53/EU of the European Parliament and of the Council.
[i.3] Void.
[i.4] Void.
ETSI
---------------------- Page: 7 ----------------------
8 Draft ETSI EN 303 345-2 V1.2.0 (2021-09)

[i.5] Recommendation ITU-R BS.1615-1: "Planning parameters for digital sound broadcasting at

frequencies below 30 MHz".

[i.6] AES17: "AES standard method for digital audio engineering - Measurement of digital audio

equipment".

[i.7] ETSI EG 203 336 (V1.1.1) (08-2015): "Electromagnetic compatibility and Radio spectrum

Matters (ERM); Guide for the selection of technical parameters for the production of Harmonised

Standards covering article 3.1(b) and article 3.2 of Directive 2014/53/EU".

[i.8] ITU GE75: "Final Acts of the Regional Administrative LF/MF Broadcasting Conference

(Regions 1 and 3)".

[i.9] Recommendation ITU-R BS.560-4 (10-1997): "Radio-frequency protection ratios in LF, MF and

HF broadcasting".
[i.10] Recommendation ITU-R SM.332-4 (07-1978): "Selectivity of Receivers".
3 Definition of terms, symbols and abbreviations
3.1 Terms

For the purposes of the present document, the terms given in Directive 2014/53/EU [i.1] and the following apply:

built-in antenna: antenna that cannot be detached from the equipment
crest factor: peak to rms voltage ratio

external antenna: antenna designed to be connected to the equipment with the use of a 50 Ω or 75 Ω external

connector

integral antenna: antenna which is detachable from the equipment without the use of any tools, and not using a 50 Ω

or 75 Ω external connector

NOTE: A device that uses a supplied earphone as the antenna has an integral antenna.

3.2 Symbols
For the purposes of the present document, the following symbols apply:
dBFS decibels relative to Full Scale in accordance with AES17 [i.6]
dBm decibels relative to 1 mW of power

dBQ audio decibels after Recommendation ITU-R BS.468-4 [2] noise weighting and a quasi-peak

detector have been applied
dBµV/m decibels relative to 1 µV/m
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ACS Adjacent Channel Selectivity
ADC Analogue to Digital Converter
AM Amplitude Modulation
BS Broadcast Sound
BW BandWidth
DDC Direct Digital Conversion
EFTA European Free Trade Association
EU European Union
HF High Frequency
ETSI
---------------------- Page: 8 ----------------------
9 Draft ETSI EN 303 345-2 V1.2.0 (2021-09)
IQ In-phase and Quadrature
ITU-R International Telecommunications Union - Radiocommunications sector
LF Low Frequency
LO Local Oscillator
MF Medium Frequency
NZIF Near-Zero Intermediate Frequency
PC Personal Computer
RED Radio Equipment Directive
RF Radio Frequency
RMS Root Mean Square
SNR Signal to Noise Ratio
USB Universal Serial Bus
4 Technical requirements specifications
4.1 Test signal configurations

The generated AM signals (wanted, unwanted and blocking) shall be in accordance with table 1. The configuration is

based on Recommendation ITU-R BS.1615-1 [i.5].
Table 1: AM configuration
AM signals
Parameter
Wanted Unwanted Blocking
Audio modulation Weighted noise
Recommendation ITU-R
1 kHz tone BS.559-2 [3], clause 1, 1 kHz tone
band-limited to 4,5 kHz
(see note 1)
Other modulation 22,8 % RMS depth
40 % depth 80 % depth
parameters (see note 2)

NOTE 1: The filter shall have a cut-off frequency of 4,5 kHz and a minimum roll-off of 60 dB/octave.

NOTE 2: This is equivalent to a quasi-peak modulation depth of 50 %. The demodulated audio level will have the

same quasi-peak value as that of a carrier with 50 % AM modulation depth modulated with a 1 kHz sinusoid.

The means of generating the noise modulation for the "unwanted" signal is shown in figure 1.

ETSI
---------------------- Page: 9 ----------------------
10 Draft ETSI EN 303 345-2 V1.2.0 (2021-09)
a) Hardware method
b) PC sound card method
c) Vector signal generator method

NOTE: In a), the low pass filter has a cut-off frequency of 4,5 kHz and a minimum roll-off of 60 dB/octave;

in b), the low pass filter has a cut-off frequency of 20 kHz and a minimum roll-off of 40 dB/octave.

Figure 1: Example arrangements for generating the unwanted signal

Waveform files to produce the signals using either the PC sound card method or the vector signal generator method are

contained in archive en_30334501v010101p0.zip which accompanies ETSI EN 303 345-1 [1]. For further details see

annex B.
4.2 Sensitivity
4.2.1 Definition

The receiver sensitivity is the minimum wanted signal level required to provide a given level of audio quality.

4.2.2 Limits

The limits for sensitivity specified in table 2 shall apply. Each figure quoted is the required level of wanted signal which

provides a given level of audio quality. The audio impairment criterion relevant for these tests is that the audio

SNR ≥ 22 dBQ ref 40 % AM.
Table 2: AM sensitivity requirements
De-modulation Tuned Wanted signal Required sensitivity limit
frequency centre Conducted Radiated
band frequency
(dBm) (dBμV/m)
(MHz)
(see note)
AM LF 0,216 -65 74
MF 0,999 -65 66
HF 9,650 -65 60

NOTE: If the receiver cannot be tuned to 9,650 MHz, the wanted signal centre frequency

shall be set to the closest alternate from the following list: 3,980 MHz, 6,050 MHz,

7,330 MHz, 11,850 MHz, 13,720 MHz, 15,450 MHz, 17,690 MHz, 18,960 MHz,
21,650 MHz, 25,890 MHz.
ETSI
---------------------- Page: 10 ----------------------
11 Draft ETSI EN 303 345-2 V1.2.0 (2021-09)
4.2.3 Conformance

Conformance testing as defined in ETSI EN 303 345-1 [1], clause 5.3.4.1 shall be carried out for each frequency band

provided by the receiver. The wanted signal generator shall be set to produce a signal according to table 1 at the centre

frequency according to table 2. The required sensitivity level shall be as indicated in table 2. If the impairment criterion

given in clause 4.2.2 is met for all provided bands then the receiver has passed the sensitivity requirement.

NOTE: When measuring the AM power level, the carrier is unmodulated.
4.3 Adjacent channel selectivity and blocking
4.3.1 Definition

The adjacent channel selectivity is a measure of the capability of the receiver to receive a wanted modulated signal

without exceeding a given degradation due to the presence of an unwanted signal which differs in frequency from the

wanted signal by an amount equal to a small multiple of the adjacent channel spacing. The wanted and unwanted

signals are of the same modulation type.

The blocking ratio is a measure of the capability of the receiver to receive a wanted modulated signal without exceeding

a given degradation due to the presence of an unwanted input signal at a given frequency separation. The wanted and

unwanted signals are of the same modulation type.

In order to provide effective use of spectrum, devices shall be able to demodulate the tuned signal in the presence of

similar signals in adjacent channels. In addition, testing shall also be performed to check the ability of the receiver to

work effectively with interfering signals at a greater separation from the wanted signal (blocking).

The channel spacings specified in table 3 shall apply.
Table 3: Channel spacing for adjacent channel selectivity and blocking
Demodulation Tuned frequency Unwanted frequency Unwanted frequency
band (N = 1, 2, 3) (blocking)
AM LF ±N × 9 kHz ±90 kHz
MF ±N × 9 kHz ±90 kHz
HF ±N × 10 kHz ±100 kHz
4.3.2 Limits

The limits for selectivity and blocking specified in table 4 shall apply with the channel spacings given in table 3. Each

figure quoted is the minimum acceptable level of unwanted signal, relative to that of the wanted signal, which provides

a given level of audio quality. The audio impairment criteria relevant for these tests is that the audio SNR ≥ 22 dBQ ref

40 % AM.
ETSI
---------------------- Page: 11 ----------------------
12 Draft ETSI EN 303 345-2 V1.2.0 (2021-09)
Table 4: Adjacent channel selectivity and blocking requirements
De- Tuned C C Required I/C ratio
modulation frequency Wanted Wanted signal level (see notes 2 and 3)
(see note 1) band signal centre Conducted Radiated N = 1 N = 2 N = 3 Blocking
frequency (dBm) (dBμV/m) (dB) (dB) (dB) (dB)
(MHz)
(see note 4)
AM (built-in or LF 0,216 n/a 80 -20 10 20 20
integral MF 0,999 n/a 72 -20 10 20 20
antenna)
HF 9,650 n/a 66 -20 10 20 20
AM (external LF 0,216 -59 n/a -5 25 35 40
antenna)
MF 0,999 -59 n/a -5 25 35 40
HF 9,650 -59 n/a -5 25 35 40

NOTE 1: The ACS and blocking requirements are currently separated into different limits for radiated and

conducted testing methods. These limits are likely to be unified in a future revision of the present

document. Users of the present document should consult frequently the latest list published in the Official

Journal of the European Union.

NOTE 2: The frequency of the interferer shall be calculated using the channel spacing data in table 3 for each of

the 6 defined adjacent channels N = {-3, -2, -1, +1, +2, +3} and the two blocking offsets. Each row of

table 4 thus defines 8 individual tests.

NOTE 3: The minimum level of I for the relevant level of impairment is calculated by adding the I/C ratio to the

wanted C level.

NOTE 4: If the receiver cannot be tuned to 9,650 MHz, the wanted signal centre frequency shall be set to the

closest alternate from the following list: 3,980 MHz, 6,050 MHz, 7,330 MHz, 11,850 MHz, 13,720 MHz,

15,450 MHz, 17,690 MHz, 18,960 MHz, 21,650 MHz, 25,890 MHz.
4.3.3 Conformance

Conformance testing as defined in ETSI EN 303 345-1 [1], clause 5.3.5.1 shall be carried out for each frequency band

provided by the receiver and for all eight frequency offsets specified in table 3.

The wanted and unwanted signal generators shall be set to produce signals according to table 1. The centre frequency of

the wanted signal is set according to table 4. The frequency offset of the unwanted or blocking signal to the wanted

signal is set according to table 3. The required wanted signal level shall be as indicated in table 4. The required

unwanted or blocking signal level offset shall be as indicated in table 4. If the impairment criterion given in clause 4.3.2

is met for all the test offsets for all provided bands then the receiver has passed the adjacent channel selectivity and

blocking requirement.
4.4 Unwanted emissions in the spurious domain
4.4.1 Definition

Spurious domain radiated and conducted (differential voltage) emissions from the equipment.

4.4.2 Limits

The limits for conducted (differential voltage) spurious domain emissions for an external RF port are specified in

EN 55032 [4], table A.13, clause 13.3 for all receivers except car radios, or clause 13.4 for car radios.

The limits for radiated spurious domain emissions are specified in EN 55032 [4], tables A.4 and A6.

4.4.3 Conformance
For receivers with an external antenna connection, conformity shall be assesse
...

SLOVENSKI STANDARD
oSIST prEN 303 345-2 V1.2.0:2021
01-december-2021

Radiodifuzijski zvočni sprejemniki - 2. del: Radiodifuzijska zvočna storitev AM -

Harmonizirani standard za dostop do radijskega spektra
Broadcast Sound Receivers - Part 2: AM broadcast sound service - Harmonised
Standard for access to radio spectrum
Ta slovenski standard je istoveten z: ETSI EN 303 345-2 V1.2.0 (2021-09)
ICS:
33.060.20 Sprejemna in oddajna Receiving and transmitting
oprema equipment
oSIST prEN 303 345-2 V1.2.0:2021 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 303 345-2 V1.2.0:2021
---------------------- Page: 2 ----------------------
oSIST prEN 303 345-2 V1.2.0:2021
Draft ETSI EN 303 345-2 V1.2.0 (2021-09)
HARMONISED EUROPEAN STANDARD
Broadcast Sound Receivers;
Part 2: AM broadcast sound service;
Harmonised Standard for access to radio spectrum
---------------------- Page: 3 ----------------------
oSIST prEN 303 345-2 V1.2.0:2021
2 Draft ETSI EN 303 345-2 V1.2.0 (2021-09)
Reference
REN/ERM-TG17-156
Keywords
analogue, broadcast, harmonised standard, radio,
receiver
ETSI
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© ETSI 2021.
All rights reserved.
ETSI
---------------------- Page: 4 ----------------------
oSIST prEN 303 345-2 V1.2.0:2021
3 Draft ETSI EN 303 345-2 V1.2.0 (2021-09)
Contents

Intellectual Property Rights ................................................................................................................................ 5

Foreword ............................................................................................................................................................. 5

Modal verbs terminology .................................................................................................................................... 6

Introduction ........................................................................................................................................................ 6

1 Scope ........................................................................................................................................................ 7

2 References ................................................................................................................................................ 7

2.1 Normative references ......................................................................................................................................... 7

2.2 Informative references ........................................................................................................................................ 7

3 Definition of terms, symbols and abbreviations ....................................................................................... 8

3.1 Terms .................................................................................................................................................................. 8

3.2 Symbols .............................................................................................................................................................. 8

3.3 Abbreviations ..................................................................................................................................................... 8

4 Technical requirements specifications ..................................................................................................... 9

4.1 Test signal configurations .................................................................................................................................. 9

4.2 Sensitivity ......................................................................................................................................................... 10

4.2.1 Definition .................................................................................................................................................... 10

4.2.2 Limits .......................................................................................................................................................... 10

4.2.3 Conformance............................................................................................................................................... 11

4.3 Adjacent channel selectivity and blocking ....................................................................................................... 11

4.3.1 Definition .................................................................................................................................................... 11

4.3.2 Limits .......................................................................................................................................................... 11

4.3.3 Conformance............................................................................................................................................... 12

4.4 Unwanted emissions in the spurious domain.................................................................................................... 12

4.4.1 Definition .................................................................................................................................................... 12

4.4.2 Limits .......................................................................................................................................................... 12

4.4.3 Conformance............................................................................................................................................... 12

5 Testing for compliance with technical requirements .............................................................................. 13

5.1 Environmental conditions for testing ............................................................................................................... 13

Annex A (informative): Relationship between the present document and the essential

requirements of Directive 2014/53/EU ......................................................... 14

Annex B (informative): Test signal generation .................................................................................... 15

Annex C (informative): Development of the present document ......................................................... 17

C.1 Introduction ............................................................................................................................................ 17

C.2 Relevance ............................................................................................................................................... 17

C.3 Receiver parameters under article 3.2 .................................................................................................... 17

C.3.1 General ............................................................................................................................................................. 17

C.3.2 Receiver sensitivity .......................................................................................................................................... 17

C.3.3 Receiver co-channel rejection .......................................................................................................................... 18

C.3.4 Receiver selectivity .......................................................................................................................................... 18

C.3.4.1 General ........................................................................................................................................................ 18

C.3.4.2 Single signal selectivity .............................................................................................................................. 18

C.3.4.2.1 Receiver adjacent signal selectivity (adjacent channel selectivity) ....................................................... 18

C.3.4.2.2 Receiver spurious response rejection .................................................................................................... 18

C.3.4.3 Receiver multiple signal selectivity ............................................................................................................ 18

C.3.4.3.1 Receiver blocking ................................................................................................................................. 18

C.3.4.3.2 Receiver radio-frequency intermodulation ............................................................................................ 19

C.3.4.3.3 Receiver adjacent signal selectivity (adjacent channel selectivity) ....................................................... 19

C.3.4.4 Other receiver effects .................................................................................................................................. 19

ETSI
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oSIST prEN 303 345-2 V1.2.0:2021
4 Draft ETSI EN 303 345-2 V1.2.0 (2021-09)

C.3.4.4.1 Receiver dynamic range ........................................................................................................................ 19

C.3.4.4.2 Reciprocal mixing ................................................................................................................................. 19

C.3.4.4.3 Desensitization ...................................................................................................................................... 19

C.3.5 Receiver unwanted emissions in the spurious domain ..................................................................................... 20

Annex D (informative): Change History .............................................................................................. 21

History .............................................................................................................................................................. 22

ETSI
---------------------- Page: 6 ----------------------
oSIST prEN 303 345-2 V1.2.0:2021
5 Draft ETSI EN 303 345-2 V1.2.0 (2021-09)
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 Web server (https://ipr.etsi.org/).

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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Foreword

This draft Harmonised European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic

compatibility and Radio spectrum Matters (ERM), and is now submitted for the combined Public Enquiry and Vote

phase of the ETSI standards EN Approval Procedure.

The present document has been prepared under the Commission's standardisation request C(2015) 5376 final [i.2] to

provide one voluntary means of conforming to the essential requirements of Directive 2014/53/EU on the harmonisation

of the laws of the Member States relating to the making available on the market of radio equipment and repealing

Directive 1999/5/EC [i.1].

Once the present document is cited in the Official Journal of the European Union under that Directive, compliance with

the normative clauses of the present document given in table A.1 confers, within the limits of the scope of the present

document, a presumption of conformity with the corresponding essential requirements of that Directive and associated

EFTA regulations.

The present document is part 2 of a multi-part deliverable. Full details of the entire series can be found in part 1 [1].

The present document has a number of test data files that are contained in archive en_30334501v010101p0.zip which

accompanies ETSI EN 303 345-1 [1].
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): 18 months after doa

ETSI
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oSIST prEN 303 345-2 V1.2.0:2021
6 Draft ETSI EN 303 345-2 V1.2.0 (2021-09)
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.

Introduction

The present document provides the necessary limits and conformance requirements for radio receivers to meet the

essential requirements of article 3.2 of Directive 2014/53/EU [i.1] for the AM sound broadcast service and is used with

reference to ETSI EN 303 345-1 [1], which describes the generic requirements and test methods.

ETSI
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7 Draft ETSI EN 303 345-2 V1.2.0 (2021-09)
1 Scope

The present document specifies technical characteristics and methods of measurements for broadcast sound receivers

with AM demodulation.

NOTE: The relationship between the present document and essential requirements of article 3.2 of Directive

2014/53/EU [i.1] is given in annex A.
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 EN 303 345-1 (V1.1.1) (06-2019): "Broadcast Sound Receivers; Part 1: Generic

requirements and measuring methods".

[2] Recommendation ITU-R BS.468-4 (07-1986): "Measurement of audio-frequency noise voltage

level in sound broadcasting".

[3] Recommendation ITU-R BS.559-2 (06-1990): "Objective measurement of radio-frequency

protection ratios in LF, MF and HF broadcasting".

[4] EN 55032:2015: "Electromagnetic compatibility of multimedia equipment - Emission

Requirements", produced by CENELEC.
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] Directive 2014/53/EU of the European Parliament and of the Council of 16 April 2014 on the

harmonisation of the laws of the Member States relating to the making available on the market of

radio equipment and repealing Directive 1999/5/EC.

[i.2] Commission Implementing Decision C(2015) 5376 final of 4.8.2015 on a standardisation request

to the European Committee for Electrotechnical Standardisation and to the European

Telecommunications Standards Institute as regards radio equipment in support of Directive

2014/53/EU of the European Parliament and of the Council.
[i.3] Void.
[i.4] Void.
ETSI
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oSIST prEN 303 345-2 V1.2.0:2021
8 Draft ETSI EN 303 345-2 V1.2.0 (2021-09)

[i.5] Recommendation ITU-R BS.1615-1: "Planning parameters for digital sound broadcasting at

frequencies below 30 MHz".

[i.6] AES17: "AES standard method for digital audio engineering - Measurement of digital audio

equipment".

[i.7] ETSI EG 203 336 (V1.1.1) (08-2015): "Electromagnetic compatibility and Radio spectrum

Matters (ERM); Guide for the selection of technical parameters for the production of Harmonised

Standards covering article 3.1(b) and article 3.2 of Directive 2014/53/EU".

[i.8] ITU GE75: "Final Acts of the Regional Administrative LF/MF Broadcasting Conference

(Regions 1 and 3)".

[i.9] Recommendation ITU-R BS.560-4 (10-1997): "Radio-frequency protection ratios in LF, MF and

HF broadcasting".
[i.10] Recommendation ITU-R SM.332-4 (07-1978): "Selectivity of Receivers".
3 Definition of terms, symbols and abbreviations
3.1 Terms

For the purposes of the present document, the terms given in Directive 2014/53/EU [i.1] and the following apply:

built-in antenna: antenna that cannot be detached from the equipment
crest factor: peak to rms voltage ratio

external antenna: antenna designed to be connected to the equipment with the use of a 50 Ω or 75 Ω external

connector

integral antenna: antenna which is detachable from the equipment without the use of any tools, and not using a 50 Ω

or 75 Ω external connector

NOTE: A device that uses a supplied earphone as the antenna has an integral antenna.

3.2 Symbols
For the purposes of the present document, the following symbols apply:
dBFS decibels relative to Full Scale in accordance with AES17 [i.6]
dBm decibels relative to 1 mW of power

dBQ audio decibels after Recommendation ITU-R BS.468-4 [2] noise weighting and a quasi-peak

detector have been applied
dBµV/m decibels relative to 1 µV/m
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ACS Adjacent Channel Selectivity
ADC Analogue to Digital Converter
AM Amplitude Modulation
BS Broadcast Sound
BW BandWidth
DDC Direct Digital Conversion
EFTA European Free Trade Association
EU European Union
HF High Frequency
ETSI
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9 Draft ETSI EN 303 345-2 V1.2.0 (2021-09)
IQ In-phase and Quadrature
ITU-R International Telecommunications Union - Radiocommunications sector
LF Low Frequency
LO Local Oscillator
MF Medium Frequency
NZIF Near-Zero Intermediate Frequency
PC Personal Computer
RED Radio Equipment Directive
RF Radio Frequency
RMS Root Mean Square
SNR Signal to Noise Ratio
USB Universal Serial Bus
4 Technical requirements specifications
4.1 Test signal configurations

The generated AM signals (wanted, unwanted and blocking) shall be in accordance with table 1. The configuration is

based on Recommendation ITU-R BS.1615-1 [i.5].
Table 1: AM configuration
AM signals
Parameter
Wanted Unwanted Blocking
Audio modulation Weighted noise
Recommendation ITU-R
1 kHz tone BS.559-2 [3], clause 1, 1 kHz tone
band-limited to 4,5 kHz
(see note 1)
Other modulation 22,8 % RMS depth
40 % depth 80 % depth
parameters (see note 2)

NOTE 1: The filter shall have a cut-off frequency of 4,5 kHz and a minimum roll-off of 60 dB/octave.

NOTE 2: This is equivalent to a quasi-peak modulation depth of 50 %. The demodulated audio level will have the

same quasi-peak value as that of a carrier with 50 % AM modulation depth modulated with a 1 kHz sinusoid.

The means of generating the noise modulation for the "unwanted" signal is shown in figure 1.

ETSI
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oSIST prEN 303 345-2 V1.2.0:2021
10 Draft ETSI EN 303 345-2 V1.2.0 (2021-09)
a) Hardware method
b) PC sound card method
c) Vector signal generator method

NOTE: In a), the low pass filter has a cut-off frequency of 4,5 kHz and a minimum roll-off of 60 dB/octave;

in b), the low pass filter has a cut-off frequency of 20 kHz and a minimum roll-off of 40 dB/octave.

Figure 1: Example arrangements for generating the unwanted signal

Waveform files to produce the signals using either the PC sound card method or the vector signal generator method are

contained in archive en_30334501v010101p0.zip which accompanies ETSI EN 303 345-1 [1]. For further details see

annex B.
4.2 Sensitivity
4.2.1 Definition

The receiver sensitivity is the minimum wanted signal level required to provide a given level of audio quality.

4.2.2 Limits

The limits for sensitivity specified in table 2 shall apply. Each figure quoted is the required level of wanted signal which

provides a given level of audio quality. The audio impairment criterion relevant for these tests is that the audio

SNR ≥ 22 dBQ ref 40 % AM.
Table 2: AM sensitivity requirements
De-modulation Tuned Wanted signal Required sensitivity limit
frequency centre Conducted Radiated
band frequency
(dBm) (dBμV/m)
(MHz)
(see note)
AM LF 0,216 -65 74
MF 0,999 -65 66
HF 9,650 -65 60

NOTE: If the receiver cannot be tuned to 9,650 MHz, the wanted signal centre frequency

shall be set to the closest alternate from the following list: 3,980 MHz, 6,050 MHz,

7,330 MHz, 11,850 MHz, 13,720 MHz, 15,450 MHz, 17,690 MHz, 18,960 MHz,
21,650 MHz, 25,890 MHz.
ETSI
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4.2.3 Conformance

Conformance testing as defined in ETSI EN 303 345-1 [1], clause 5.3.4.1 shall be carried out for each frequency band

provided by the receiver. The wanted signal generator shall be set to produce a signal according to table 1 at the centre

frequency according to table 2. The required sensitivity level shall be as indicated in table 2. If the impairment criterion

given in clause 4.2.2 is met for all provided bands then the receiver has passed the sensitivity requirement.

NOTE: When measuring the AM power level, the carrier is unmodulated.
4.3 Adjacent channel selectivity and blocking
4.3.1 Definition

The adjacent channel selectivity is a measure of the capability of the receiver to receive a wanted modulated signal

without exceeding a given degradation due to the presence of an unwanted signal which differs in frequency from the

wanted signal by an amount equal to a small multiple of the adjacent channel spacing. The wanted and unwanted

signals are of the same modulation type.

The blocking ratio is a measure of the capability of the receiver to receive a wanted modulated signal without exceeding

a given degradation due to the presence of an unwanted input signal at a given frequency separation. The wanted and

unwanted signals are of the same modulation type.

In order to provide effective use of spectrum, devices shall be able to demodulate the tuned signal in the presence of

similar signals in adjacent channels. In addition, testing shall also be performed to check the ability of the receiver to

work effectively with interfering signals at a greater separation from the wanted signal (blocking).

The channel spacings specified in table 3 shall apply.
Table 3: Channel spacing for adjacent channel selectivity and blocking
Demodulation Tuned frequency Unwanted frequency Unwanted frequency
band (N = 1, 2, 3) (blocking)
AM LF ±N × 9 kHz ±90 kHz
MF ±N × 9 kHz ±90 kHz
HF ±N × 10 kHz ±100 kHz
4.3.2 Limits

The limits for selectivity and blocking specified in table 4 shall apply with the channel spacings given in table 3. Each

figure quoted is the minimum acceptable level of unwanted signal, relative to that of the wanted signal, which provides

a given level of audio quality. The audio impairment criteria relevant for these tests is that the audio SNR ≥ 22 dBQ ref

40 % AM.
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oSIST prEN 303 345-2 V1.2.0:2021
12 Draft ETSI EN 303 345-2 V1.2.0 (2021-09)
Table 4: Adjacent channel selectivity and blocking requirements
De- Tuned C C Required I/C ratio
modulation frequency Wanted Wanted signal level (see notes 2 and 3)
(see note 1) band signal centre Conducted Radiated N = 1 N = 2 N = 3 Blocking
frequency (dBm) (dBμV/m) (dB) (dB) (dB) (dB)
(MHz)
(see note 4)
AM (built-in or LF 0,216 n/a 80 -20 10 20 20
integral MF 0,999 n/a 72 -20 10 20 20
antenna)
HF 9,650 n/a 66 -20 10 20 20
AM (external LF 0,216 -59 n/a -5 25 35 40
antenna)
MF 0,999 -59 n/a -5 25 35 40
HF 9,650 -59 n/a -5 25 35 40

NOTE 1: The ACS and blocking requirements are currently separated into different limits for radiated and

conducted testing methods. These limits are likely to be unified in a future revision of the present

document. Users of the present document should consult frequently the latest list published in the Official

Journal of the European Union.

NOTE 2: The frequency of the interferer shall be calculated using the channel spacing data in table 3 for each of

the 6 defined adjacent channels N = {-3, -2, -1, +1, +2, +3} and the two blocking offsets. Each row of

table 4 thus defines 8 individual tests.

NOTE 3: The minimum level of I for the relevant level of impairment is calculated by adding the I/C ratio to the

wanted C level.

NOTE 4: If the receiver cannot be tuned to 9,650 MHz, the wanted signal centre frequency shall be set to the

closest alternate from the following list: 3,980 MHz, 6,050 MHz, 7,330 MHz, 11,850 MHz, 13,720 MHz,

15,450 MHz, 17,690 MHz, 18,960 MHz, 21,650 MHz, 25,890 MHz.
4.3.3 Conformance

Conformance testing as defined in ETSI EN 303 345-1 [1], clause 5.3.5.1 shall be carried out for each frequency band

provided by the receiver and for all eight frequency offsets specified in table 3.

The wanted and unwa
...

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