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SIST EN 303 345-3 V1.1.1:2021
01-september-2021
Radiodifuzijski zvočni sprejemniki - 3. del: Radiodifuzijska zvočna storitev FM -
Harmonizirani standard za dostop do radijskega spektra
Broadcast Sound Receivers - Part 3: FM broadcast sound service - Harmonised
Standard for access to radio spectrum
Ta slovenski standard je istoveten z: ETSI EN 303 345-3 V1.1.1 (2021-06)
ICS:
33.060.20 Sprejemna in oddajna Receiving and transmitting
oprema equipment
SIST EN 303 345-3 V1.1.1:2021 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 303 345-3 V1.1.1:2021
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SIST EN 303 345-3 V1.1.1:2021
ETSI EN 303 345-3 V1.1.1 (2021-06)
HARMONISED EUROPEAN STANDARD
Broadcast Sound Receivers;
Part 3: FM broadcast sound service;
Harmonised Standard for access to radio spectrum
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SIST EN 303 345-3 V1.1.1:2021
2 ETSI EN 303 345-3 V1.1.1 (2021-06)
Reference
DEN/ERM-TG17-153
Keywords
analogue, broadcast, harmonised standard, radio,
receiver
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ETSI
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SIST EN 303 345-3 V1.1.1:2021
3 ETSI EN 303 345-3 V1.1.1 (2021-06)
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. 10
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 . 12
5.1 Environmental conditions for testing . 12
Annex A (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 13
Annex B (informative): Test signal generation . 14
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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SIST EN 303 345-3 V1.1.1:2021
4 ETSI EN 303 345-3 V1.1.1 (2021-06)
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
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SIST EN 303 345-3 V1.1.1:2021
5 ETSI EN 303 345-3 V1.1.1 (2021-06)
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 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 3 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: 31 May 2021
Date of latest announcement of this EN (doa): 31 August 2021
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 28 February 2022
Date of withdrawal of any conflicting National Standard (dow): 28 February 2023
ETSI
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SIST EN 303 345-3 V1.1.1:2021
6 ETSI EN 303 345-3 V1.1.1 (2021-06)
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 FM 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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SIST EN 303 345-3 V1.1.1:2021
7 ETSI EN 303 345-3 V1.1.1 (2021-06)
1 Scope
The present document specifies the test signal configuration and the limits for sensitivity, selectivity, blocking and
unwanted emissions in the spurious domain for devices that receive FM broadcast sound services.
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] Recommendation ITU-R BS.641 (07/1986): "Determination of radio-frequency protection ratios
for frequency-modulated sound broadcasting".
ETSI
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SIST EN 303 345-3 V1.1.1:2021
8 ETSI EN 303 345-3 V1.1.1 (2021-06)
[i.4] AES17: "AES standard method for digital audio engineering - Measurement of digital audio
equipment".
[i.5] 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.6] ITU GE84: "Final Acts of the Regional Administrative Radio Conference for the Planning of the
VHF Sound Broadcasting (Region 1 and part of Region 3)".
[i.7] Recommendation ITU-R BS.412-9 (12/1998): "Planning standards for terrestrial FM sound
broadcasting at VHF".
[i.8] 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.4]
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
ALC Automatic Level Control
AM Amplitude Modulation
ATT ATTenuation
BS Broadcast Sound
BW BandWidth
DDC Direct Digital Conversion
EFTA European Free Trade Association
EU European Union
ETSI
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SIST EN 303 345-3 V1.1.1:2021
9 ETSI EN 303 345-3 V1.1.1 (2021-06)
FM Frequency Modulation
IQ In-phase and Quadrature
ITU-R International Telecommunications Union - Radiocommunications sector
LO Local Oscillator
NZIF Near-Zero Intermediate Frequency
PC Personal Computer
RBW Resolution BandWidth
RED Radio Equipment Directive
RF Radio Frequency
RMS Root Mean Square
SNR Signal to Noise Ratio
SWT SWeep Time
USB Universal Serial Bus
VHF Very High Frequency
4 Technical requirements specifications
4.1 Test signal configurations
The generated FM signals (wanted and unwanted) and the blocking signal shall be in accordance with table 1. The
configuration is based on Recommendation ITU-R BS.641 [i.3].
Table 1: FM configuration
FM signals AM signal
Parameter
Wanted Unwanted Blocking
Weighted noise
Recommendation ITU-R
Audio modulation 1 kHz tone 1 kHz tone
BS.559-2 [3], clause 1, band-
limited to 15 kHz (see note 1)
Other modulation 15,9 kHz RMS deviation
±60,8 kHz peak deviation 80 % depth
parameters (see note 2)
Pilot tone None None
NOTE 1: The filter shall have a cut-off frequency of 15 kHz and a minimum roll-off of 60 dB/octave.
NOTE 2: This is equivalent to a quasi-peak deviation of 34,8 kHz and has pre-emphasis enabled. The quasi-peak
level measurement is defined by Recommendation ITU-R BS.641 [i.3], clause 5; with pre-emphasis
disabled the quasi-peak deviation is 32 kHz (14,5 kHz RMS).
The means of generating the noise modulation for the "unwanted" signal is shown in figure 1.
ETSI
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SIST EN 303 345-3 V1.1.1:2021
10 ETSI EN 303 345-3 V1.1.1 (2021-06)
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 15 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 criteria relevant for these tests is that the audio
SNR ≥ 40 dBQ ref ±60,8 kHz deviation, and that there shall be 10 seconds of audio with no subjective impairments
(e.g. clicks resulting from FM threshold effects).
Table 2: FM sensitivity requirements
De-modulation Tuned Wanted signal Required sensitivity limit
frequency centre Conducted Radiated
band frequency
(dBm) (dBμV/m)
(MHz)
FM VHF band II 98 -90 50 (see note)
NOTE: For products with an integral antenna, the requirement is relaxed to 67 dBµV/m.
4.2.3 Conformance
Conformance tests as defined in ETSI EN 303 345-1 [1], clause 5.3.4.1 shall be carried out. 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 criteria given in clause 4.2.2 is met then the receiver
has passed the sensitivity requirement.
ETSI
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SIST EN 303 345-3 V1.1.1:2021
11 ETSI EN 303 345-3 V1.1.1 (2021-06)
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 different modulation types.
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 = 2, 3, 4) (blocking)
FM VHF band II ±N × 100 kHz ±800 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 ≥ 40 dBQ ref
±60,8 kHz deviation, and that there shall be 10 seconds of audio with no subjective impairments (e.g. clicks resulting
from FM threshold effects).
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
frequency
(MHz)
Conducted Radiated N = 2 N = 3 N = 4 Blocking
(dBm) (dBμV/m) (dB) (dB) (dB) (dB)
FM (built-in or VHF band II 98 n/a 56 -15 -3 8 20
integral (see note 4)
antenna)
FM (external VHF band II 98 -84 n/a 3 17 30 30
antenna)
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 = {-4, -3, -2, +2, +3, +4} 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: The wanted signal level for receivers with integral antenna is 73 dBμV/m.
ETSI
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SIST EN 303 345-3 V1.1.1:2021
12 ETSI EN 303 345-3 V1.1.1 (2021-06)
4.3.3 Conformance
Conformance tests as defined in ETSI EN 303 345-1 [1], clause 5.3.5.1 shall be carried out 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
...