ETSI EN 302 077 V2.3.1 (2022-09)

Final draft ETSI EN 302 077 V2.3.0 (2022-07)

HARMONISED EUROPEAN STANDARD
Transmitting equipment for the
Digital Audio Broadcasting (DAB) service;
Harmonised Standard for access to radio spectrum

2 Final draft ETSI EN 302 077 V2.3.0 (2022-07)

Reference
REN/ERM-TG17-201
Keywords
audio, broadcasting, DAB, digital, harmonised
standard, radio, regulation
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ETSI
3 Final draft ETSI EN 302 077 V2.3.0 (2022-07)
Contents
Intellectual Property Rights . 6
Foreword . 6
Modal verbs terminology . 7
1 Scope . 8
2 References . 8
2.1 Normative references . 8
2.2 Informative references . 9
3 Definition of terms, symbols and abbreviations . 9
3.1 Terms . 9
3.2 Symbols . 10
3.3 Abbreviations . 10
4 Technical requirements specifications . 11
4.1 Environmental profile . 11
4.2 Conformance requirements . 11
4.2.1 Rated output power . 11
4.2.1.1 Definition . 11
4.2.1.2 Limit . 11
4.2.1.3 Conformance . 11
4.2.2 Frequency stability . 12
4.2.2.1 Definition . 12
4.2.2.2 Limit . 12
4.2.2.3 Conformance . 12
4.2.3 Crest factor. 12
4.2.3.1 Definition . 12
4.2.3.2 Limit . 12
4.2.3.3 Conformance . 12
4.2.4 Spurious emissions . 12
4.2.4.1 Definition . 12
4.2.4.2 Limits . 12
4.2.4.3 Conformance . 13
4.2.5 Out-of-band emissions . 13
4.2.5.1 Definition . 13
4.2.5.2 Limit . 14
4.2.5.3 Conformance . 16
4.2.6 MCOFDM systems: ACLR performance . 17
4.2.6.1 Definition . 17
4.2.6.2 Limit . 17
4.2.6.3 Conformance . 17
4.2.7 MCOFDM systems: MER performance . 17
4.2.7.1 Definition . 17
4.2.7.2 Limit . 17
4.2.7.3 Conformance . 17
4.2.8 Behaviour in case of erroneous ETI signal . 17
4.2.8.1 Definition . 17
4.2.8.2 Limit . 17
4.2.8.3 Conformance . 18
4.2.9 BER-Performance degradation . 18
4.2.9.1 Definition . 18
4.2.9.2 Limit . 18
4.2.9.3 Conformance . 18
5 Testing for compliance with technical requirements . 18
5.1 Environmental conditions for testing . 18
5.2 Test modulating signal . 19
5.3 Methods of measurement . 19
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4 Final draft ETSI EN 302 077 V2.3.0 (2022-07)
5.3.1 Rated output power . 19
5.3.1.1 Initial conditions . 19
5.3.1.2 Procedure . 19
5.3.1.3 Test requirements . 19
5.3.2 Frequency stability . 19
5.3.2.1 Initial conditions . 19
5.3.2.2 Procedure . 20
5.3.2.3 Test requirements . 20
5.3.3 Crest factor. 20
5.3.3.1 Initial conditions . 20
5.3.3.2 Procedure . 20
5.3.3.3 Test requirements . 20
5.3.4 Spurious emissions . 20
5.3.4.1 Initial conditions . 20
5.3.4.2 Procedure . 21
5.3.4.3 Test requirements . 21
5.3.5 Out-of-band emissions . 21
5.3.5.1 Initial conditions . 21
5.3.5.2 Procedure . 21
5.3.5.3 Test requirements . 21
5.3.6 MCOFDM systems: ACLR . 21
5.3.6.1 Initial conditions . 21
5.3.6.2 Procedure . 21
5.3.6.3 Test requirements . 22
5.3.7 MCOFDM systems: MER . 22
5.3.7.1 Initial conditions . 22
5.3.7.2 Procedure . 22
5.3.7.3 Test requirements . 22
5.3.8 Behaviour in case of erroneous ETI signal . 22
5.3.8.1 Initial conditions . 22
5.3.8.2 Procedure . 22
5.3.8.3 Test requirements . 23
5.3.9 BER-Performance degradation . 23
5.3.9.1 Initial conditions . 23
5.3.9.2 Procedure . 23
5.3.9.3 Test requirements . 23
Annex A (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 24
Annex B (normative): Measuring arrangements . 25
B.1 Testing arrangements for antenna port measurements . 25
B.1.1 Antenna port measurements . 25
B.1.2 Out-of-band emissions . 26
B.1.3 MCOFDM: ACLR and MER performance . 26
Annex C (normative): COFDM measuring arrangements . 27
C.1 ETI errors . 27
C.2 Bit Error performance measurement . 27
Annex D (informative): Practical measurement of spurious domain emissions . 28
D.1 Introduction . 28
D.2 Directional coupler issues . 28
Annex E (informative): Spectrum measurements . 29
Annex F (informative): MCOFDM systems . 30
F.1 Introduction . 30
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5 Final draft ETSI EN 302 077 V2.3.0 (2022-07)
F.2 Architecture . 31
Annex G (informative): Maximum measurement uncertainty . 33
Annex H (informative): Change history . 34
History . 35

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6 Final draft ETSI EN 302 077 V2.3.0 (2022-07)
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 final 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 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.4] 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.
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

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7 Final draft ETSI EN 302 077 V2.3.0 (2022-07)
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
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8 Final draft ETSI EN 302 077 V2.3.0 (2022-07)
1 Scope
The present document specifies technical characteristics and methods of measurements for transmitting equipment for
broadcast sound services using the Digital Audio Broadcast (DAB) modulation system operating in VHF band III
(174 MHz to 240 MHz).
DAB transmissions are licensed by national administrations. The Final Acts of the CEPT T-DAB Planning Meeting
Constanţa, 2007 (WI95revCO07) [i.2] and the Final Acts of the Regional Radiocommunication Conference for planning
of the digital terrestrial broadcasting service in parts of Regions 1 and 3, in the frequency bands 174 MHz to 230 MHz
and 470 MHz to 862 MHz (RRC-06) [i.3] provide spectrum masks for Out-of-Band emissions under different
conditions. These requirements are represented by four transmission cases in the present document, see table 0. The
license conditions set by the national administration stipulate which transmission case (Out-of-Band spectrum mask)
applies.
Table 0: Transmission cases
Case Description Identification in Identification in RRC-06
WI95revCO07
1 Applicable to DAB transmissions operating in areas 1: critical 2: sensitive
critical for adjacent channel DAB to DAB interference,
and in any case when it is necessary to protect other
services operating on adjacent frequencies on a primary
basis
2 Applicable to DAB transmissions when no other case 2: non-critical 1: non-critical
applies
3 Applicable to DAB transmitters in exceptional Critical case considering
circumstances to protect safety services protection of distress
and safety frequencies
4 Applicable to DAB transmissions operating on a 3: sensitive in certain
case-by-case basis in certain areas areas where channel 12D
is in use
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 300 401 (V2.1.1) (01-2017): "Radio broadcasting systems; Digital Audio Broadcasting
(DAB) to mobile, portable and fixed receivers".
[2] ETSI ETS 300 799 (Edition 1) (09-1997): "Digital Audio Broadcasting (DAB); Distribution
interfaces; Ensemble Transport Interface (ETI)".
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9 Final draft ETSI EN 302 077 V2.3.0 (2022-07)
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] Final Acts of the CEPT T-DAB Planning Meeting Constanţa, 2007 (WI95revCO07).
[i.3] Final Acts of the Regional Radiocommunication Conference for planning of the digital terrestrial
broadcasting service in parts of Regions 1 and 3, in the frequency bands 174-230 MHz and
470-862 MHz (RRC-06).
[i.4] 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.
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:
Adjacent Channel Leakage Ratio (ACLR): ratio of the mean power of the DAB signal in the OFDM block at f to
L
the mean power of the unoccupied OFDM block within the MCOFDM group
antenna port: port of an apparatus which is designed, in normal operation, to be connected to an antenna using coaxial
cable
broadcasting service: radiocommunication service in which the transmissions are intended for direct reception by the
general public
NOTE: This service may include sound transmissions, television transmissions or other types of transmission.
DAB transmitter: device comprising a DAB exciter and RF amplifier
dBc: decibels relative to the unmodulated carrier power of the emission
NOTE: In the cases which do not have a carrier, for example in some digital modulation schemes where the
carrier is not accessible for measurement, the reference level equivalent to dBc is decibels relative to the
mean power P.
f : centre frequency of the highest frequency OFDM block generated by the DAB transmitter
H
f : centre frequency of the lowest frequency OFDM block generated by the DAB transmitter
L
NOTE: In the case of a single block transmitter, f = f .
L H
harmonic: component of order greater than 1 of the Fourier series of a periodic quantity
high power transmitter: transmitter whose rated output power is greater than 1 000 W per OFDM block
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10 Final draft ETSI EN 302 077 V2.3.0 (2022-07)
intermodulation products: unwanted frequencies resulting from intermodulation between carriers or harmonics of
emission, or between any oscillations generated to produce the carrier
low power transmitter: transmitter whose rated output power is less than or equal to 25 W per OFDM block
MCOFDM group: group of OFDM blocks generated by a MCOFDM system
MCOFDM system: low power transmitter system that generates more than one OFDM block with an overall RF
system filter spanning all blocks
mean power: average power supplied to the antenna port by a transmitter during an interval of time sufficiently long
compared with the lowest frequency encountered in the modulation envelope taken under normal operating conditions
medium power transmitter: transmitter whose rated output power is greater than 25 W and less than or equal to
1 000 W per OFDM block
necessary bandwidth: width of the frequency band which is sufficient to ensure the transmission of information at the
rate and with the quality required under specified conditions
OFDM block: group of digitally modulated carriers comprising a complete DAB ensemble
out-of-band emissions: emission on a frequency or frequencies immediately outside the necessary bandwidth which
results from the modulation process, but excluding spurious emissions
rated output power: mean power that the transmitter delivers at its antenna port under specified conditions of
operation
reference bandwidth: bandwidth in which the emission level is specified
RF system filter: filter connected to the output of the RF amplifier to control output spectrum
NOTE: The RF system filter may be internal or external to the transmitter casing.
spurious emissions: emissions on a frequency or frequencies which are outside the necessary bandwidth and the level
of which may be reduced without affecting the corresponding transmission of information
NOTE: Spurious emissions include harmonic emissions, parasitic emissions, intermodulation products and
frequency conversion products but exclude out of band emissions.
unwanted emissions: spurious emissions and out-of-band emissions
3.2 Symbols
For the purposes of the present document, the following symbols apply:
" inch
C/N Carrier power to Noise power density
Hz Hertz (cycles per second)
m metre
-6
μ micro, 10
V Volt
W Watt
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ACLR Adjacent Channel Leakage Ratio
BER Bit Error Ratio
COFDM Coded Orthogonal Frequency Division Multiplex
CRC Cyclic Redundancy Check
CW Continuous Wave
DAB Digital Audio Broadcasting
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11 Final draft ETSI EN 302 077 V2.3.0 (2022-07)
EDI Encapsulation of DAB Interfaces
EFTA European Free Trade Association
EMC ElectroMagnetic Compatibility
ETI Ensemble Transport Interface
EUT Equipment Under Test
MCOFDM Multiple Coded Orthogonal Frequency Division Multiplex
MER Modulation Error Ratio
N Noise power
OFDM Orthogonal Frequency Division Multiplex
OOB Out-Of-Band
PRBS Pseudo Random Binary Sequence
RF Radio Frequency
RMS Root Mean Square
SFN Single Frequency Network
TII Transmitter Identification Information
Tx Transmitter
VHF Very High Frequency
4 Technical requirements specifications
4.1 Environmental profile
The technical requirements of the present document apply under the environmental profile for operation of the
equipment, which shall be in accordance with its intended use. The equipment shall comply with all the technical
requirements of the present document at all times when operating within the boundary limits of the operational
environmental profile defined by its intended use.
4.2 Conformance requirements
4.2.1 Rated output power
4.2.1.1 Definition
The rated output power is the mean power that the transmitter shall deliver at its antenna port.
For MCOFDM systems, the rated output power is the mean power of the highest powered OFDM block within the
MCOFDM group.
Transmitters shall be categorized into one of three power classes, as follows:
• low power;
• medium power;
• high power.
4.2.1.2 Limit
The output power shall be within ±0,5 dB of the rated output power.
4.2.1.3 Conformance
Conformance tests as defined in clause 5.3.1 shall be carried out.
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12 Final draft ETSI EN 302 077 V2.3.0 (2022-07)
4.2.2 Frequency stability
4.2.2.1 Definition
The frequency stability of an emission is the variation of frequency against a predetermined time scale.
4.2.2.2 Limit
The stability of the centre frequency shall not deviate more than 10 Hz from its nominal value.
4.2.2.3 Conformance
Conformance tests as defined in clause 5.3.2 shall be carried out.
4.2.3 Crest factor
4.2.3.1 Definition
Maximum ratio of peak power to mean power levels.
4.2.3.2 Limit
The peak level of the output RF power signal shall not exceed the mean power level by more than 13 dB.
4.2.3.3 Conformance
Conformance tests as defined in clause 5.3.3 shall be carried out.
4.2.4 Spurious emissions
4.2.4.1 Definition
Emission on a frequency or frequencies which are outside the necessary bandwidth and the level of which may be
reduced without affecting the corresponding transmission of information. Spurious emissions include harmonic
emissions, parasitic emissions, intermodulation products and frequency conversion products but exclude out-of-band
emissions.
For the purposes of the present document spurious emissions are emissions at frequencies below f - 3 MHz, where f
L L
is the centre frequency of the lowest frequency OFDM block, and above f + 3 MHz, where f is the centre frequency
H H
of the highest frequency OFDM block of the transmission, irrespective of the number of blocks employed. In the case of
a single block transmitter, f = f .
L H
The reference bandwidth used for spurious emissions measurements shall be as follows:
• 1 kHz between 9 kHz and 150 kHz;
• 10 kHz between 150 kHz and 30 MHz;
• 100 kHz between 30 MHz and 1 GHz;
• 1 MHz above 1 GHz.
4.2.4.2 Limits
Spurious emissions shall not exceed the values set out in table 1, shown additionally in figure 1, for the frequency range
9 kHz to 3 GHz at the output of the RF system filter.
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13 Final draft ETSI EN 302 077 V2.3.0 (2022-07)
Table 1: Spurious emissions limits
Mean power Limits
of the transmitter Mean power absolute levels (dBm) or relative levels (dBc) below the
power supplied to the antenna port in the reference bandwidth
(see clause 4.2.4.1)
P < 9 dBW -36 dBm
9 dBW < P < 29 dBW 75 dBc
29 dBW < P < 39 dBW -16 dBm
39 dBW < P < 50 dBW 85 dBc
50 dBW < P -5 dBm
Figure 1: Spurious emissions limits for DAB transmitters
Figure 2: Void
4.2.4.3 Conformance
Conformance tests as defined in clause 5.3.4 shall be carried out.
4.2.5 Out-of-band emissions
4.2.5.1 Definition
Emission on a frequency or frequencies immediately outside the necessary bandwidth which results from the
modulation process, but excludes spurious emissions.
For the purposes of the present document out-of-band emissions are emissions at frequencies outside the necessary
bandwidth and within the frequency ranges f - 3 MHz to f , where f is the centre frequency of the lowest frequency
L L L
OFDM block, and f to f + 3 MHz, where f is the centre frequency of the highest frequency OFDM block of the
H H H
transmission, irrespective of the number of blocks employed. In the case of a single block transmitter, f = f .
L H
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14 Final draft ETSI EN 302 077 V2.3.0 (2022-07)
4.2.5.2 Limit
Out-of-band emissions shall not exceed the limits specified in tables 2 to 5, additionally shown in figure 3 and figure 4.
Out-of-band emissions limits are given as mean power level measured in a 4 kHz bandwidth, where 0 dB corresponds
to the mean output power.
The national licence conditions specify which case the DAB transmitter shall conform to:
Case 1: The solid line mask (see figure 3) shall apply to DAB transmitters operating in areas critical for
adjacent channel DAB to DAB interference, and in any case when it is necessary to protect other
services operating on adjacent frequencies on a primary basis.
Case 2: The dashed line mask (see figure 3) shall apply to DAB transmitters in other cases.
Case 3: The solid line mask (see figure 4) shall apply to DAB transmitters in exceptional circumstances to
protect safety services.
Case 4: The chain dotted line mask (see figure 4) shall apply to DAB transmitters operating on a case by
case basis in certain areas.
Table 2: Case 1: Transmitters operating in critical cases
1,54 MHz block, Low power Medium power High Power
frequency difference from Absolute level Relative level Absolute level
the centre frequency (dBm) (dBc) (dBm)
(MHz)
±0,77 18 -26 34
±0,97 -27 -71 -11
±1,75 -62 -106 -46
±3,0 -62 -106 -46
Table 3: Case 2: Transmitters operating in non-critical cases
1,54 MHz block, Low power Medium power High Power
frequency difference from Absolute level Relative level Absolute level
the centre frequency (dBm) (dBc) (dBm)
(MHz)
±0,97 18 -26 34
±0,97 -12 -56 4
±3,0 -62 -106 -46
Table 4: Case 3: Transmitters operating in exceptional circumstances to protect safety services
1,54 MHz block, Low power Medium power High Power
frequency difference from Absolute level Relative level Absolute level
the centre frequency (dBm) (dBc) (dBm)
(MHz)
±0,77 18 -26 34
±0,97 -27 -71 -11
±2,2 -82 -126 -66
±3,0 -82 -126 -66
Table 5: Case 4: Transmitters operating on a case by case basis in certain areas
1,54 MHz block, Low power Medium power High Power
frequency difference from Absolute level Relative level Absolute level
the centre frequency (dBm) (dBc) (dBm)
(MHz)
±0,77 18 -26 34
±0,97 -34 -78 -18
±2,2 -82 -126 -66
±3,0 -82 -126 -66
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15 Final draft ETSI EN 302 077 V2.3.0 (2022-07)

Figure 3: Spectrum masks for DAB out-of-band emissions (case 1 and case 2)
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16 Final draft ETSI EN 302 077 V2.3.0 (2022-07)

Figure 4: Spectrum masks for DAB out-of-band emissions (case 3 and case 4)
4.2.5.3 Conformance
Conformance tests as defined in clause 5.3.5 shall be carried out.
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17 Final draft ETSI EN 302 077 V2.3.0 (2022-07)
4.2.6 MCOFDM systems: ACLR performance
4.2.6.1 Definition
Adjacent channel performance required for unoccupied OFDM blocks within the MCOFDM group.
The ACLR is defined as the ratio of the mean power of the DAB signal in the OFDM block at f to the mean power of
L
the unoccupied OFDM block within the MCOFDM group.
Out-of-band emissions which fall between f and f within the MCOFDM group are not influenced by the RF system
L H
filter. Every unoccupied OFDM block within the MCOFDM group shall be subject to an ACLR limit.
4.2.6.2 Limit
For each unoccupied OFDM block within the MCOFDM group, the ACLR shall be ≥ 55 dB.
4.2.6.3 Conformance
Conformance tests as defined in clause 5.3.6 shall be carried out.
4.2.7 MCOFDM systems: MER performance
4.2.7.1 Definition
MER performance required for every occupied OFDM block within the MCOFDM group.
4.2.7.2 Limit
For every occupied OFDM block within the MCOFDM group, the MER shall be ≥ 20 dB.
4.2.7.3 Conformance
Conformance tests as defined in clause 5.3.7 shall be carried out.
4.2.8 Behaviour in case of erroneous ETI signal
4.2.8.1 Definition
Operational status of transmitter during ETI signal error (see ETSI ETS 300 799 [2], clauses 4 to 8).
4.2.8.2 Limit
The minimum requirements for DAB transmitters shall be:
• P = 4;
• Q = 40;
• M = 80.
If the input signal is absent, or if frame synchronization is not achieved, the transmitter RF signal shall be muted in line
with spurious emission limits, clause 4.2.4.2.
If frame synchronization is achieved, but CRC violations are detected, the transmitter shall offer two alternative
responses:
a) The output RF signal is not affected by sporadic single CRC violations. The output RF signal is switched off
after P CRC violations in Q frames, and switched on after M consecutive frames free from CRC violations.
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18 Final draft ETSI EN 302 077 V2.3.0 (2022-07)
b) The output RF signal is transmitted irrespective of CRC violations.
After the warming-up time of the transmitter the output RF signal shall be stable within two seconds following the
application of an error-free input signal.
4.2.8.3 Conformance
Conformance tests as defined in clause 5.3.8 shall be carried out.
4.2.9 BER-Performance degradation
4.2.9.1 Definition
Difference between theoretical and actual BER degradation.
4.2.9.2 Limit
An operational transmitter shall not degrade the theoretical system BER (with channel coding and decoding) by more
than 1 dB, under the conditions set out in table 6 and table 7.
Table 6: BER Performance degradation limits
Code Rate R for equal convolutional coding 0,5
Theoretical performance according to table 7

Table 7: BER Performance degradation limits
BER C/N
-2
5,0 dB
1 × 10
-3
5,4 dB
3 × 10
-3
5,8 dB
1 × 10
-4
6,2 dB
3 × 10
-4
6,6 dB
1 × 10
-5
6,9 dB
3 × 10
-5
7,2 dB
1 × 10
-6
7,5 dB
3 × 10
-6
7,8 dB
1 × 10
4.2.9.3 Conformance
Conformance tests as defined in clause 5.3.9 shall be carried out.
5 Testing for compliance with technical requirements
5.1 Environmental conditions for testing
Tests defined in the present document shall be carried out at representative points within the boundary limits of the
operational environmental profile defined by its i
...

HARMONISED EUROPEAN STANDARD
Transmitting equipment for the
Digital Audio Broadcasting (DAB) service;
Harmonised Standard for access to radio spectrum

2 ETSI EN 302 077 V2.3.1 (2022-09)

Reference
REN/ERM-TG17-201
Keywords
audio, broadcasting, DAB, digital,
harmonised standard, radio, regulation
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ETSI
3 ETSI EN 302 077 V2.3.1 (2022-09)
Contents
Intellectual Property Rights . 6
Foreword . 6
Modal verbs terminology . 7
1 Scope . 8
2 References . 8
2.1 Normative references . 8
2.2 Informative references . 9
3 Definition of terms, symbols and abbreviations . 9
3.1 Terms . 9
3.2 Symbols . 10
3.3 Abbreviations . 10
4 Technical requirements specifications . 11
4.1 Environmental profile . 11
4.2 Conformance requirements . 11
4.2.1 Rated output power . 11
4.2.1.1 Definition . 11
4.2.1.2 Limit . 11
4.2.1.3 Conformance . 11
4.2.2 Frequency stability . 12
4.2.2.1 Definition . 12
4.2.2.2 Limit . 12
4.2.2.3 Conformance . 12
4.2.3 Crest factor. 12
4.2.3.1 Definition . 12
4.2.3.2 Limit . 12
4.2.3.3 Conformance . 12
4.2.4 Spurious emissions . 12
4.2.4.1 Definition . 12
4.2.4.2 Limits . 12
4.2.4.3 Conformance . 13
4.2.5 Out-of-band emissions . 13
4.2.5.1 Definition . 13
4.2.5.2 Limit . 14
4.2.5.3 Conformance . 16
4.2.6 MCOFDM systems: ACLR performance . 17
4.2.6.1 Definition . 17
4.2.6.2 Limit . 17
4.2.6.3 Conformance . 17
4.2.7 MCOFDM systems: MER performance . 17
4.2.7.1 Definition . 17
4.2.7.2 Limit . 17
4.2.7.3 Conformance . 17
4.2.8 Behaviour in case of erroneous ETI signal . 17
4.2.8.1 Definition . 17
4.2.8.2 Limit . 17
4.2.8.3 Conformance . 18
4.2.9 BER-Performance degradation . 18
4.2.9.1 Definition . 18
4.2.9.2 Limit . 18
4.2.9.3 Conformance . 18
5 Testing for compliance with technical requirements . 18
5.1 Environmental conditions for testing . 18
5.2 Test modulating signal . 19
5.3 Methods of measurement . 19
ETSI
4 ETSI EN 302 077 V2.3.1 (2022-09)
5.3.1 Rated output power . 19
5.3.1.1 Initial conditions . 19
5.3.1.2 Procedure . 19
5.3.1.3 Test requirements . 19
5.3.2 Frequency stability . 19
5.3.2.1 Initial conditions . 19
5.3.2.2 Procedure . 20
5.3.2.3 Test requirements . 20
5.3.3 Crest factor. 20
5.3.3.1 Initial conditions . 20
5.3.3.2 Procedure . 20
5.3.3.3 Test requirements . 20
5.3.4 Spurious emissions . 20
5.3.4.1 Initial conditions . 20
5.3.4.2 Procedure . 21
5.3.4.3 Test requirements . 21
5.3.5 Out-of-band emissions . 21
5.3.5.1 Initial conditions . 21
5.3.5.2 Procedure . 21
5.3.5.3 Test requirements . 21
5.3.6 MCOFDM systems: ACLR . 21
5.3.6.1 Initial conditions . 21
5.3.6.2 Procedure . 21
5.3.6.3 Test requirements . 22
5.3.7 MCOFDM systems: MER . 22
5.3.7.1 Initial conditions . 22
5.3.7.2 Procedure . 22
5.3.7.3 Test requirements . 22
5.3.8 Behaviour in case of erroneous ETI signal . 22
5.3.8.1 Initial conditions . 22
5.3.8.2 Procedure . 22
5.3.8.3 Test requirements . 23
5.3.9 BER-Performance degradation . 23
5.3.9.1 Initial conditions . 23
5.3.9.2 Procedure . 23
5.3.9.3 Test requirements . 23
Annex A (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 24
Annex B (normative): Measuring arrangements . 25
B.1 Testing arrangements for antenna port measurements . 25
B.1.1 Antenna port measurements . 25
B.1.2 Out-of-band emissions . 26
B.1.3 MCOFDM: ACLR and MER performance . 26
Annex C (normative): COFDM measuring arrangements . 27
C.1 ETI errors . 27
C.2 Bit Error performance measurement . 27
Annex D (informative): Practical measurement of spurious domain emissions . 28
D.1 Introduction . 28
D.2 Directional coupler issues . 28
Annex E (informative): Spectrum measurements . 29
Annex F (informative): MCOFDM systems . 30
F.1 Introduction . 30
ETSI
5 ETSI EN 302 077 V2.3.1 (2022-09)
F.2 Architecture . 31
Annex G (informative): Maximum measurement uncertainty . 33
Annex H (informative): Change history . 34
History . 35

ETSI
6 ETSI EN 302 077 V2.3.1 (2022-09)
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
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ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
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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.4] 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.
National transposition dates
Date of adoption of this EN: 30 August 2022
Date of latest announcement of this EN (doa): 30 November 2022
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 May 2023
Date of withdrawal of any conflicting National Standard (dow): 31 May 2024

ETSI
7 ETSI EN 302 077 V2.3.1 (2022-09)
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.
ETSI
8 ETSI EN 302 077 V2.3.1 (2022-09)
1 Scope
The present document specifies technical characteristics and methods of measurements for transmitting equipment for
broadcast sound services using the Digital Audio Broadcast (DAB) modulation system operating in VHF band III
(174 MHz to 240 MHz).
DAB transmissions are licensed by national administrations. The Final Acts of the CEPT T-DAB Planning Meeting
Constanţa, 2007 (WI95revCO07) [i.2] and the Final Acts of the Regional Radiocommunication Conference for planning
of the digital terrestrial broadcasting service in parts of Regions 1 and 3, in the frequency bands 174 MHz to 230 MHz
and 470 MHz to 862 MHz (RRC-06) [i.3] provide spectrum masks for Out-of-Band emissions under different
conditions. These requirements are represented by four transmission cases in the present document, see table 0. The
license conditions set by the national administration stipulate which transmission case (Out-of-Band spectrum mask)
applies.
Table 0: Transmission cases
Case Description Identification in Identification in RRC-06
WI95revCO07
1 Applicable to DAB transmissions operating in areas 1: critical 2: sensitive
critical for adjacent channel DAB to DAB interference,
and in any case when it is necessary to protect other
services operating on adjacent frequencies on a primary
basis
2 Applicable to DAB transmissions when no other case 2: non-critical 1: non-critical
applies
3 Applicable to DAB transmitters in exceptional Critical case considering
circumstances to protect safety services protection of distress
and safety frequencies
4 Applicable to DAB transmissions operating on a 3: sensitive in certain
case-by-case basis in certain areas areas where channel 12D
is in use
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 300 401 (V2.1.1) (01-2017): "Radio broadcasting systems; Digital Audio Broadcasting
(DAB) to mobile, portable and fixed receivers".
[2] ETSI ETS 300 799 (Edition 1) (09-1997): "Digital Audio Broadcasting (DAB); Distribution
interfaces; Ensemble Transport Interface (ETI)".
ETSI
9 ETSI EN 302 077 V2.3.1 (2022-09)
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] Final Acts of the CEPT T-DAB Planning Meeting Constanţa, 2007 (WI95revCO07).
[i.3] Final Acts of the Regional Radiocommunication Conference for planning of the digital terrestrial
broadcasting service in parts of Regions 1 and 3, in the frequency bands 174-230 MHz and
470-862 MHz (RRC-06).
[i.4] 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.
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:
Adjacent Channel Leakage Ratio (ACLR): ratio of the mean power of the DAB signal in the OFDM block at f to
L
the mean power of the unoccupied OFDM block within the MCOFDM group
antenna port: port of an apparatus which is designed, in normal operation, to be connected to an antenna using coaxial
cable
broadcasting service: radiocommunication service in which the transmissions are intended for direct reception by the
general public
NOTE: This service may include sound transmissions, television transmissions or other types of transmission.
DAB transmitter: device comprising a DAB exciter and RF amplifier
dBc: decibels relative to the unmodulated carrier power of the emission
NOTE: In the cases which do not have a carrier, for example in some digital modulation schemes where the
carrier is not accessible for measurement, the reference level equivalent to dBc is decibels relative to the
mean power P.
f : centre frequency of the highest frequency OFDM block generated by the DAB transmitter
H
f : centre frequency of the lowest frequency OFDM block generated by the DAB transmitter
L
NOTE: In the case of a single block transmitter, f = f .
L H
harmonic: component of order greater than 1 of the Fourier series of a periodic quantity
high power transmitter: transmitter whose rated output power is greater than 1 000 W per OFDM block
ETSI
10 ETSI EN 302 077 V2.3.1 (2022-09)
intermodulation products: unwanted frequencies resulting from intermodulation between carriers or harmonics of
emission, or between any oscillations generated to produce the carrier
low power transmitter: transmitter whose rated output power is less than or equal to 25 W per OFDM block
MCOFDM group: group of OFDM blocks generated by a MCOFDM system
MCOFDM system: low power transmitter system that generates more than one OFDM block with an overall RF
system filter spanning all blocks
mean power: average power supplied to the antenna port by a transmitter during an interval of time sufficiently long
compared with the lowest frequency encountered in the modulation envelope taken under normal operating conditions
medium power transmitter: transmitter whose rated output power is greater than 25 W and less than or equal to
1 000 W per OFDM block
necessary bandwidth: width of the frequency band which is sufficient to ensure the transmission of information at the
rate and with the quality required under specified conditions
OFDM block: group of digitally modulated carriers comprising a complete DAB ensemble
out-of-band emissions: emission on a frequency or frequencies immediately outside the necessary bandwidth which
results from the modulation process, but excluding spurious emissions
rated output power: mean power that the transmitter delivers at its antenna port under specified conditions of
operation
reference bandwidth: bandwidth in which the emission level is specified
RF system filter: filter connected to the output of the RF amplifier to control output spectrum
NOTE: The RF system filter may be internal or external to the transmitter casing.
spurious emissions: emissions on a frequency or frequencies which are outside the necessary bandwidth and the level
of which may be reduced without affecting the corresponding transmission of information
NOTE: Spurious emissions include harmonic emissions, parasitic emissions, intermodulation products and
frequency conversion products but exclude out of band emissions.
unwanted emissions: spurious emissions and out-of-band emissions
3.2 Symbols
For the purposes of the present document, the following symbols apply:
" inch
C/N Carrier power to Noise power density
Hz Hertz (cycles per second)
m metre
-6
μ micro, 10
V Volt
W Watt
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ACLR Adjacent Channel Leakage Ratio
BER Bit Error Ratio
COFDM Coded Orthogonal Frequency Division Multiplex
CRC Cyclic Redundancy Check
CW Continuous Wave
DAB Digital Audio Broadcasting
ETSI
11 ETSI EN 302 077 V2.3.1 (2022-09)
EDI Encapsulation of DAB Interfaces
EFTA European Free Trade Association
EMC ElectroMagnetic Compatibility
ETI Ensemble Transport Interface
EUT Equipment Under Test
MCOFDM Multiple Coded Orthogonal Frequency Division Multiplex
MER Modulation Error Ratio
N Noise power
OFDM Orthogonal Frequency Division Multiplex
OOB Out-Of-Band
PRBS Pseudo Random Binary Sequence
RF Radio Frequency
RMS Root Mean Square
SFN Single Frequency Network
TII Transmitter Identification Information
Tx Transmitter
VHF Very High Frequency
4 Technical requirements specifications
4.1 Environmental profile
The technical requirements of the present document apply under the environmental profile for operation of the
equipment, which shall be in accordance with its intended use. The equipment shall comply with all the technical
requirements of the present document at all times when operating within the boundary limits of the operational
environmental profile defined by its intended use.
4.2 Conformance requirements
4.2.1 Rated output power
4.2.1.1 Definition
The rated output power is the mean power that the transmitter shall deliver at its antenna port.
For MCOFDM systems, the rated output power is the mean power of the highest powered OFDM block within the
MCOFDM group.
Transmitters shall be categorized into one of three power classes, as follows:
• low power;
• medium power;
• high power.
4.2.1.2 Limit
The output power shall be within ±0,5 dB of the rated output power.
4.2.1.3 Conformance
Conformance tests as defined in clause 5.3.1 shall be carried out.
ETSI
12 ETSI EN 302 077 V2.3.1 (2022-09)
4.2.2 Frequency stability
4.2.2.1 Definition
The frequency stability of an emission is the variation of frequency against a predetermined time scale.
4.2.2.2 Limit
The stability of the centre frequency shall not deviate more than 10 Hz from its nominal value.
4.2.2.3 Conformance
Conformance tests as defined in clause 5.3.2 shall be carried out.
4.2.3 Crest factor
4.2.3.1 Definition
Maximum ratio of peak power to mean power levels.
4.2.3.2 Limit
The peak level of the output RF power signal shall not exceed the mean power level by more than 13 dB.
4.2.3.3 Conformance
Conformance tests as defined in clause 5.3.3 shall be carried out.
4.2.4 Spurious emissions
4.2.4.1 Definition
Emission on a frequency or frequencies which are outside the necessary bandwidth and the level of which may be
reduced without affecting the corresponding transmission of information. Spurious emissions include harmonic
emissions, parasitic emissions, intermodulation products and frequency conversion products but exclude out-of-band
emissions.
For the purposes of the present document spurious emissions are emissions at frequencies below f - 3 MHz, where f
L L
is the centre frequency of the lowest frequency OFDM block, and above f + 3 MHz, where f is the centre frequency
H H
of the highest frequency OFDM block of the transmission, irrespective of the number of blocks employed. In the case of
a single block transmitter, f = f .
L H
The reference bandwidth used for spurious emissions measurements shall be as follows:
• 1 kHz between 9 kHz and 150 kHz;
• 10 kHz between 150 kHz and 30 MHz;
• 100 kHz between 30 MHz and 1 GHz;
• 1 MHz above 1 GHz.
4.2.4.2 Limits
Spurious emissions shall not exceed the values set out in table 1, shown additionally in figure 1, for the frequency range
9 kHz to 3 GHz at the output of the RF system filter.
ETSI
13 ETSI EN 302 077 V2.3.1 (2022-09)
Table 1: Spurious emissions limits
Mean power Limits
of the transmitter Mean power absolute levels (dBm) or relative levels (dBc) below the
power supplied to the antenna port in the reference bandwidth
(see clause 4.2.4.1)
P < 9 dBW -36 dBm
9 dBW < P < 29 dBW 75 dBc
29 dBW < P < 39 dBW -16 dBm
39 dBW < P < 50 dBW 85 dBc
50 dBW < P -5 dBm
Figure 1: Spurious emissions limits for DAB transmitters
Figure 2: Void
4.2.4.3 Conformance
Conformance tests as defined in clause 5.3.4 shall be carried out.
4.2.5 Out-of-band emissions
4.2.5.1 Definition
Emission on a frequency or frequencies immediately outside the necessary bandwidth which results from the
modulation process, but excludes spurious emissions.
For the purposes of the present document out-of-band emissions are emissions at frequencies outside the necessary
bandwidth and within the frequency ranges f - 3 MHz to f , where f is the centre frequency of the lowest frequency
L L L
OFDM block, and f to f + 3 MHz, where f is the centre frequency of the highest frequency OFDM block of the
H H H
transmission, irrespective of the number of blocks employed. In the case of a single block transmitter, f = f .
L H
ETSI
14 ETSI EN 302 077 V2.3.1 (2022-09)
4.2.5.2 Limit
Out-of-band emissions shall not exceed the limits specified in tables 2 to 5, additionally shown in figure 3 and figure 4.
Out-of-band emissions limits are given as mean power level measured in a 4 kHz bandwidth, where 0 dB corresponds
to the mean output power.
The national licence conditions specify which case the DAB transmitter shall conform to:
Case 1: The solid line mask (see figure 3) shall apply to DAB transmitters operating in areas critical for
adjacent channel DAB to DAB interference, and in any case when it is necessary to protect other
services operating on adjacent frequencies on a primary basis.
Case 2: The dashed line mask (see figure 3) shall apply to DAB transmitters in other cases.
Case 3: The solid line mask (see figure 4) shall apply to DAB transmitters in exceptional circumstances to
protect safety services.
Case 4: The chain dotted line mask (see figure 4) shall apply to DAB transmitters operating on a case by
case basis in certain areas.
Table 2: Case 1: Transmitters operating in critical cases
1,54 MHz block, Low power Medium power High Power
frequency difference from Absolute level Relative level Absolute level
the centre frequency (dBm) (dBc) (dBm)
(MHz)
±0,77 18 -26 34
±0,97 -27 -71 -11
±1,75 -62 -106 -46
±3,0 -62 -106 -46
Table 3: Case 2: Transmitters operating in non-critical cases
1,54 MHz block, Low power Medium power High Power
frequency difference from Absolute level Relative level Absolute level
the centre frequency (dBm) (dBc) (dBm)
(MHz)
±0,97 18 -26 34
±0,97 -12 -56 4
±3,0 -62 -106 -46
Table 4: Case 3: Transmitters operating in exceptional circumstances to protect safety services
1,54 MHz block, Low power Medium power High Power
frequency difference from Absolute level Relative level Absolute level
the centre frequency (dBm) (dBc) (dBm)
(MHz)
±0,77 18 -26 34
±0,97 -27 -71 -11
±2,2 -82 -126 -66
±3,0 -82 -126 -66
Table 5: Case 4: Transmitters operating on a case by case basis in certain areas
1,54 MHz block, Low power Medium power High Power
frequency difference from Absolute level Relative level Absolute level
the centre frequency (dBm) (dBc) (dBm)
(MHz)
±0,77 18 -26 34
±0,97 -34 -78 -18
±2,2 -82 -126 -66
±3,0 -82 -126 -66
ETSI
15 ETSI EN 302 077 V2.3.1 (2022-09)

Figure 3: Spectrum masks for DAB out-of-band emissions (case 1 and case 2)
ETSI
16 ETSI EN 302 077 V2.3.1 (2022-09)

Figure 4: Spectrum masks for DAB out-of-band emissions (case 3 and case 4)
4.2.5.3 Conformance
Conformance tests as defined in clause 5.3.5 shall be carried out.
ETSI
17 ETSI EN 302 077 V2.3.1 (2022-09)
4.2.6 MCOFDM systems: ACLR performance
4.2.6.1 Definition
Adjacent channel performance required for unoccupied OFDM blocks within the MCOFDM group.
The ACLR is defined as the ratio of the mean power of the DAB signal in the OFDM block at f to the mean power of
L
the unoccupied OFDM block within the MCOFDM group.
Out-of-band emissions which fall between f and f within the MCOFDM group are not influenced by the RF system
L H
filter. Every unoccupied OFDM block within the MCOFDM group shall be subject to an ACLR limit.
4.2.6.2 Limit
For each unoccupied OFDM block within the MCOFDM group, the ACLR shall be ≥ 55 dB.
4.2.6.3 Conformance
Conformance tests as defined in clause 5.3.6 shall be carried out.
4.2.7 MCOFDM systems: MER performance
4.2.7.1 Definition
MER performance required for every occupied OFDM block within the MCOFDM group.
4.2.7.2 Limit
For every occupied OFDM block within the MCOFDM group, the MER shall be ≥ 20 dB.
4.2.7.3 Conformance
Conformance tests as defined in clause 5.3.7 shall be carried out.
4.2.8 Behaviour in case of erroneous ETI signal
4.2.8.1 Definition
Operational status of transmitter during ETI signal error (see ETSI ETS 300 799 [2], clauses 4 to 8).
4.2.8.2 Limit
The minimum requirements for DAB transmitters shall be:
• P = 4;
• Q = 40;
• M = 80.
If the input signal is absent, or if frame synchronization is not achieved, the transmitter RF signal shall be muted in line
with spurious emission limits, clause 4.2.4.2.
If frame synchronization is achieved, but CRC violations are detected, the transmitter shall offer two alternative
responses:
a) The output RF signal is not affected by sporadic single CRC violations. The output RF signal is switched off
after P CRC violations in Q frames, and switched on after M consecutive frames free from CRC violations.
ETSI
18 ETSI EN 302 077 V2.3.1 (2022-09)
b) The output RF signal is transmitted irrespective of CRC violations.
After the warming-up time of the transmitter the output RF signal shall be stable within two seconds following the
application of an error-free input signal.
4.2.8.3 Conformance
Conformance tests as defined in clause 5.3.8 shall be carried out.
4.2.9 BER-Performance degradation
4.2.9.1 Definition
Difference between theoretical and actual BER degradation.
4.2.9.2 Limit
An operational transmitter shall not degrade the theoretical system BER (with channel coding and decoding) by more
than 1 dB, under the conditions set out in table 6 and table 7.
Table 6: BER Performance degradation limits
Code Rate R for equal convolutional coding 0,5
Theoretical performance according to table 7

Table 7: BER Performance degradation limits
BER C/N
-2
5,0 dB
1 × 10
-3
5,4 dB
3 × 10
-3
5,8 dB
1 × 10
-4
6,2 dB
3 × 10
-4
6,6 dB
1 × 10
-5
6,9 dB
3 × 10
-5
7,2 dB
1 × 10
-6
7,5 dB
3 × 10
-6
7,8 dB
1 × 10
4.2.9.3 Conformance
Conformance tests as defined in clause 5.3.9 shall be carried out.
5 Testing for compliance with technical requirements
5.1 Environmental conditions for testing
Tests defined in the present document shall be carried out at representative points within the boundary limits of the
operational environmental profile defined by its intended use.
Where technical performance varies subject to environmental conditions, tests shall be carried out under a sufficient
variety of environmental conditions (within the boundary limits of the operational environmental profile defined by its
intended use) to give confidence of com
...

SLOVENSKI STANDARD
01-november-2022
Oddajniška oprema za storitev digitalne zvokovne radiodifuzije (DAB) -
Harmonizirani standard za dostop do radijskega spektra
Transmitting equipment for the Digital Audio Broadcasting (DAB) service - Harmonised
Standard for access to radio spectrum
Ta slovenski standard je istoveten z: ETSI EN 302 077 V2.3.1 (2022-09)
ICS:
33.060.20 Sprejemna in oddajna Receiving and transmitting
oprema equipment
33.170 Televizijska in radijska Television and radio
difuzija broadcasting
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

HARMONISED EUROPEAN STANDARD
Transmitting equipment for the
Digital Audio Broadcasting (DAB) service;
Harmonised Standard for access to radio spectrum

2 ETSI EN 302 077 V2.3.1 (2022-09)

Reference
REN/ERM-TG17-201
Keywords
audio, broadcasting, DAB, digital,
harmonised standard, radio, regulation
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ETSI
3 ETSI EN 302 077 V2.3.1 (2022-09)
Contents
Intellectual Property Rights . 6
Foreword . 6
Modal verbs terminology . 7
1 Scope . 8
2 References . 8
2.1 Normative references . 8
2.2 Informative references . 9
3 Definition of terms, symbols and abbreviations . 9
3.1 Terms . 9
3.2 Symbols . 10
3.3 Abbreviations . 10
4 Technical requirements specifications . 11
4.1 Environmental profile . 11
4.2 Conformance requirements . 11
4.2.1 Rated output power . 11
4.2.1.1 Definition . 11
4.2.1.2 Limit . 11
4.2.1.3 Conformance . 11
4.2.2 Frequency stability . 12
4.2.2.1 Definition . 12
4.2.2.2 Limit . 12
4.2.2.3 Conformance . 12
4.2.3 Crest factor. 12
4.2.3.1 Definition . 12
4.2.3.2 Limit . 12
4.2.3.3 Conformance . 12
4.2.4 Spurious emissions . 12
4.2.4.1 Definition . 12
4.2.4.2 Limits . 12
4.2.4.3 Conformance . 13
4.2.5 Out-of-band emissions . 13
4.2.5.1 Definition . 13
4.2.5.2 Limit . 14
4.2.5.3 Conformance . 16
4.2.6 MCOFDM systems: ACLR performance . 17
4.2.6.1 Definition . 17
4.2.6.2 Limit . 17
4.2.6.3 Conformance . 17
4.2.7 MCOFDM systems: MER performance . 17
4.2.7.1 Definition . 17
4.2.7.2 Limit . 17
4.2.7.3 Conformance . 17
4.2.8 Behaviour in case of erroneous ETI signal . 17
4.2.8.1 Definition . 17
4.2.8.2 Limit . 17
4.2.8.3 Conformance . 18
4.2.9 BER-Performance degradation . 18
4.2.9.1 Definition . 18
4.2.9.2 Limit . 18
4.2.9.3 Conformance . 18
5 Testing for compliance with technical requirements . 18
5.1 Environmental conditions for testing . 18
5.2 Test modulating signal . 19
5.3 Methods of measurement . 19
ETSI
4 ETSI EN 302 077 V2.3.1 (2022-09)
5.3.1 Rated output power . 19
5.3.1.1 Initial conditions . 19
5.3.1.2 Procedure . 19
5.3.1.3 Test requirements . 19
5.3.2 Frequency stability . 19
5.3.2.1 Initial conditions . 19
5.3.2.2 Procedure . 20
5.3.2.3 Test requirements . 20
5.3.3 Crest factor. 20
5.3.3.1 Initial conditions . 20
5.3.3.2 Procedure . 20
5.3.3.3 Test requirements . 20
5.3.4 Spurious emissions . 20
5.3.4.1 Initial conditions . 20
5.3.4.2 Procedure . 21
5.3.4.3 Test requirements . 21
5.3.5 Out-of-band emissions . 21
5.3.5.1 Initial conditions . 21
5.3.5.2 Procedure . 21
5.3.5.3 Test requirements . 21
5.3.6 MCOFDM systems: ACLR . 21
5.3.6.1 Initial conditions . 21
5.3.6.2 Procedure . 21
5.3.6.3 Test requirements . 22
5.3.7 MCOFDM systems: MER . 22
5.3.7.1 Initial conditions . 22
5.3.7.2 Procedure . 22
5.3.7.3 Test requirements . 22
5.3.8 Behaviour in case of erroneous ETI signal . 22
5.3.8.1 Initial conditions . 22
5.3.8.2 Procedure . 22
5.3.8.3 Test requirements . 23
5.3.9 BER-Performance degradation . 23
5.3.9.1 Initial conditions . 23
5.3.9.2 Procedure . 23
5.3.9.3 Test requirements . 23
Annex A (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 24
Annex B (normative): Measuring arrangements . 25
B.1 Testing arrangements for antenna port measurements . 25
B.1.1 Antenna port measurements . 25
B.1.2 Out-of-band emissions . 26
B.1.3 MCOFDM: ACLR and MER performance . 26
Annex C (normative): COFDM measuring arrangements . 27
C.1 ETI errors . 27
C.2 Bit Error performance measurement . 27
Annex D (informative): Practical measurement of spurious domain emissions . 28
D.1 Introduction . 28
D.2 Directional coupler issues . 28
Annex E (informative): Spectrum measurements . 29
Annex F (informative): MCOFDM systems . 30
F.1 Introduction . 30
ETSI
5 ETSI EN 302 077 V2.3.1 (2022-09)
F.2 Architecture . 31
Annex G (informative): Maximum measurement uncertainty . 33
Annex H (informative): Change history . 34
History . 35

ETSI
6 ETSI EN 302 077 V2.3.1 (2022-09)
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
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ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
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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.4] 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.
National transposition dates
Date of adoption of this EN: 30 August 2022
Date of latest announcement of this EN (doa): 30 November 2022
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 May 2023
Date of withdrawal of any conflicting National Standard (dow): 31 May 2024

ETSI
7 ETSI EN 302 077 V2.3.1 (2022-09)
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.
ETSI
8 ETSI EN 302 077 V2.3.1 (2022-09)
1 Scope
The present document specifies technical characteristics and methods of measurements for transmitting equipment for
broadcast sound services using the Digital Audio Broadcast (DAB) modulation system operating in VHF band III
(174 MHz to 240 MHz).
DAB transmissions are licensed by national administrations. The Final Acts of the CEPT T-DAB Planning Meeting
Constanţa, 2007 (WI95revCO07) [i.2] and the Final Acts of the Regional Radiocommunication Conference for planning
of the digital terrestrial broadcasting service in parts of Regions 1 and 3, in the frequency bands 174 MHz to 230 MHz
and 470 MHz to 862 MHz (RRC-06) [i.3] provide spectrum masks for Out-of-Band emissions under different
conditions. These requirements are represented by four transmission cases in the present document, see table 0. The
license conditions set by the national administration stipulate which transmission case (Out-of-Band spectrum mask)
applies.
Table 0: Transmission cases
Case Description Identification in Identification in RRC-06
WI95revCO07
1 Applicable to DAB transmissions operating in areas 1: critical 2: sensitive
critical for adjacent channel DAB to DAB interference,
and in any case when it is necessary to protect other
services operating on adjacent frequencies on a primary
basis
2 Applicable to DAB transmissions when no other case 2: non-critical 1: non-critical
applies
3 Applicable to DAB transmitters in exceptional Critical case considering
circumstances to protect safety services protection of distress
and safety frequencies
4 Applicable to DAB transmissions operating on a 3: sensitive in certain
case-by-case basis in certain areas areas where channel 12D
is in use
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 300 401 (V2.1.1) (01-2017): "Radio broadcasting systems; Digital Audio Broadcasting
(DAB) to mobile, portable and fixed receivers".
[2] ETSI ETS 300 799 (Edition 1) (09-1997): "Digital Audio Broadcasting (DAB); Distribution
interfaces; Ensemble Transport Interface (ETI)".
ETSI
9 ETSI EN 302 077 V2.3.1 (2022-09)
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] Final Acts of the CEPT T-DAB Planning Meeting Constanţa, 2007 (WI95revCO07).
[i.3] Final Acts of the Regional Radiocommunication Conference for planning of the digital terrestrial
broadcasting service in parts of Regions 1 and 3, in the frequency bands 174-230 MHz and
470-862 MHz (RRC-06).
[i.4] 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.
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:
Adjacent Channel Leakage Ratio (ACLR): ratio of the mean power of the DAB signal in the OFDM block at f to
L
the mean power of the unoccupied OFDM block within the MCOFDM group
antenna port: port of an apparatus which is designed, in normal operation, to be connected to an antenna using coaxial
cable
broadcasting service: radiocommunication service in which the transmissions are intended for direct reception by the
general public
NOTE: This service may include sound transmissions, television transmissions or other types of transmission.
DAB transmitter: device comprising a DAB exciter and RF amplifier
dBc: decibels relative to the unmodulated carrier power of the emission
NOTE: In the cases which do not have a carrier, for example in some digital modulation schemes where the
carrier is not accessible for measurement, the reference level equivalent to dBc is decibels relative to the
mean power P.
f : centre frequency of the highest frequency OFDM block generated by the DAB transmitter
H
f : centre frequency of the lowest frequency OFDM block generated by the DAB transmitter
L
NOTE: In the case of a single block transmitter, f = f .
L H
harmonic: component of order greater than 1 of the Fourier series of a periodic quantity
high power transmitter: transmitter whose rated output power is greater than 1 000 W per OFDM block
ETSI
10 ETSI EN 302 077 V2.3.1 (2022-09)
intermodulation products: unwanted frequencies resulting from intermodulation between carriers or harmonics of
emission, or between any oscillations generated to produce the carrier
low power transmitter: transmitter whose rated output power is less than or equal to 25 W per OFDM block
MCOFDM group: group of OFDM blocks generated by a MCOFDM system
MCOFDM system: low power transmitter system that generates more than one OFDM block with an overall RF
system filter spanning all blocks
mean power: average power supplied to the antenna port by a transmitter during an interval of time sufficiently long
compared with the lowest frequency encountered in the modulation envelope taken under normal operating conditions
medium power transmitter: transmitter whose rated output power is greater than 25 W and less than or equal to
1 000 W per OFDM block
necessary bandwidth: width of the frequency band which is sufficient to ensure the transmission of information at the
rate and with the quality required under specified conditions
OFDM block: group of digitally modulated carriers comprising a complete DAB ensemble
out-of-band emissions: emission on a frequency or frequencies immediately outside the necessary bandwidth which
results from the modulation process, but excluding spurious emissions
rated output power: mean power that the transmitter delivers at its antenna port under specified conditions of
operation
reference bandwidth: bandwidth in which the emission level is specified
RF system filter: filter connected to the output of the RF amplifier to control output spectrum
NOTE: The RF system filter may be internal or external to the transmitter casing.
spurious emissions: emissions on a frequency or frequencies which are outside the necessary bandwidth and the level
of which may be reduced without affecting the corresponding transmission of information
NOTE: Spurious emissions include harmonic emissions, parasitic emissions, intermodulation products and
frequency conversion products but exclude out of band emissions.
unwanted emissions: spurious emissions and out-of-band emissions
3.2 Symbols
For the purposes of the present document, the following symbols apply:
" inch
C/N Carrier power to Noise power density
Hz Hertz (cycles per second)
m metre
-6
μ micro, 10
V Volt
W Watt
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ACLR Adjacent Channel Leakage Ratio
BER Bit Error Ratio
COFDM Coded Orthogonal Frequency Division Multiplex
CRC Cyclic Redundancy Check
CW Continuous Wave
DAB Digital Audio Broadcasting
ETSI
11 ETSI EN 302 077 V2.3.1 (2022-09)
EDI Encapsulation of DAB Interfaces
EFTA European Free Trade Association
EMC ElectroMagnetic Compatibility
ETI Ensemble Transport Interface
EUT Equipment Under Test
MCOFDM Multiple Coded Orthogonal Frequency Division Multiplex
MER Modulation Error Ratio
N Noise power
OFDM Orthogonal Frequency Division Multiplex
OOB Out-Of-Band
PRBS Pseudo Random Binary Sequence
RF Radio Frequency
RMS Root Mean Square
SFN Single Frequency Network
TII Transmitter Identification Information
Tx Transmitter
VHF Very High Frequency
4 Technical requirements specifications
4.1 Environmental profile
The technical requirements of the present document apply under the environmental profile for operation of the
equipment, which shall be in accordance with its intended use. The equipment shall comply with all the technical
requirements of the present document at all times when operating within the boundary limits of the operational
environmental profile defined by its intended use.
4.2 Conformance requirements
4.2.1 Rated output power
4.2.1.1 Definition
The rated output power is the mean power that the transmitter shall deliver at its antenna port.
For MCOFDM systems, the rated output power is the mean power of the highest powered OFDM block within the
MCOFDM group.
Transmitters shall be categorized into one of three power classes, as follows:
• low power;
• medium power;
• high power.
4.2.1.2 Limit
The output power shall be within ±0,5 dB of the rated output power.
4.2.1.3 Conformance
Conformance tests as defined in clause 5.3.1 shall be carried out.
ETSI
12 ETSI EN 302 077 V2.3.1 (2022-09)
4.2.2 Frequency stability
4.2.2.1 Definition
The frequency stability of an emission is the variation of frequency against a predetermined time scale.
4.2.2.2 Limit
The stability of the centre frequency shall not deviate more than 10 Hz from its nominal value.
4.2.2.3 Conformance
Conformance tests as defined in clause 5.3.2 shall be carried out.
4.2.3 Crest factor
4.2.3.1 Definition
Maximum ratio of peak power to mean power levels.
4.2.3.2 Limit
The peak level of the output RF power signal shall not exceed the mean power level by more than 13 dB.
4.2.3.3 Conformance
Conformance tests as defined in clause 5.3.3 shall be carried out.
4.2.4 Spurious emissions
4.2.4.1 Definition
Emission on a frequency or frequencies which are outside the necessary bandwidth and the level of which may be
reduced without affecting the corresponding transmission of information. Spurious emissions include harmonic
emissions, parasitic emissions, intermodulation products and frequency conversion products but exclude out-of-band
emissions.
For the purposes of the present document spurious emissions are emissions at frequencies below f - 3 MHz, where f
L L
is the centre frequency of the lowest frequency OFDM block, and above f + 3 MHz, where f is the centre frequency
H H
of the highest frequency OFDM block of the transmission, irrespective of the number of blocks employed. In the case of
a single block transmitter, f = f .
L H
The reference bandwidth used for spurious emissions measurements shall be as follows:
• 1 kHz between 9 kHz and 150 kHz;
• 10 kHz between 150 kHz and 30 MHz;
• 100 kHz between 30 MHz and 1 GHz;
• 1 MHz above 1 GHz.
4.2.4.2 Limits
Spurious emissions shall not exceed the values set out in table 1, shown additionally in figure 1, for the frequency range
9 kHz to 3 GHz at the output of the RF system filter.
ETSI
13 ETSI EN 302 077 V2.3.1 (2022-09)
Table 1: Spurious emissions limits
Mean power Limits
of the transmitter Mean power absolute levels (dBm) or relative levels (dBc) below the
power supplied to the antenna port in the reference bandwidth
(see clause 4.2.4.1)
P < 9 dBW -36 dBm
9 dBW < P < 29 dBW 75 dBc
29 dBW < P < 39 dBW -16 dBm
39 dBW < P < 50 dBW 85 dBc
50 dBW < P -5 dBm
Figure 1: Spurious emissions limits for DAB transmitters
Figure 2: Void
4.2.4.3 Conformance
Conformance tests as defined in clause 5.3.4 shall be carried out.
4.2.5 Out-of-band emissions
4.2.5.1 Definition
Emission on a frequency or frequencies immediately outside the necessary bandwidth which results from the
modulation process, but excludes spurious emissions.
For the purposes of the present document out-of-band emissions are emissions at frequencies outside the necessary
bandwidth and within the frequency ranges f - 3 MHz to f , where f is the centre frequency of the lowest frequency
L L L
OFDM block, and f to f + 3 MHz, where f is the centre frequency of the highest frequency OFDM block of the
H H H
transmission, irrespective of the number of blocks employed. In the case of a single block transmitter, f = f .
L H
ETSI
14 ETSI EN 302 077 V2.3.1 (2022-09)
4.2.5.2 Limit
Out-of-band emissions shall not exceed the limits specified in tables 2 to 5, additionally shown in figure 3 and figure 4.
Out-of-band emissions limits are given as mean power level measured in a 4 kHz bandwidth, where 0 dB corresponds
to the mean output power.
The national licence conditions specify which case the DAB transmitter shall conform to:
Case 1: The solid line mask (see figure 3) shall apply to DAB transmitters operating in areas critical for
adjacent channel DAB to DAB interference, and in any case when it is necessary to protect other
services operating on adjacent frequencies on a primary basis.
Case 2: The dashed line mask (see figure 3) shall apply to DAB transmitters in other cases.
Case 3: The solid line mask (see figure 4) shall apply to DAB transmitters in exceptional circumstances to
protect safety services.
Case 4: The chain dotted line mask (see figure 4) shall apply to DAB transmitters operating on a case by
case basis in certain areas.
Table 2: Case 1: Transmitters operating in critical cases
1,54 MHz block, Low power Medium power High Power
frequency difference from Absolute level Relative level Absolute level
the centre frequency (dBm) (dBc) (dBm)
(MHz)
±0,77 18 -26 34
±0,97 -27 -71 -11
±1,75 -62 -106 -46
±3,0 -62 -106 -46
Table 3: Case 2: Transmitters operating in non-critical cases
1,54 MHz block, Low power Medium power High Power
frequency difference from Absolute level Relative level Absolute level
the centre frequency (dBm) (dBc) (dBm)
(MHz)
±0,97 18 -26 34
±0,97 -12 -56 4
±3,0 -62 -106 -46
Table 4: Case 3: Transmitters operating in exceptional circumstances to protect safety services
1,54 MHz block, Low power Medium power High Power
frequency difference from Absolute level Relative level Absolute level
the centre frequency (dBm) (dBc) (dBm)
(MHz)
±0,77 18 -26 34
±0,97 -27 -71 -11
±2,2 -82 -126 -66
±3,0 -82 -126 -66
Table 5: Case 4: Transmitters operating on a case by case basis in certain areas
1,54 MHz block, Low power Medium power High Power
frequency difference from Absolute level Relative level Absolute level
the centre frequency (dBm) (dBc) (dBm)
(MHz)
±0,77 18 -26 34
±0,97 -34 -78 -18
±2,2 -82 -126 -66
±3,0 -82 -126 -66
ETSI
15 ETSI EN 302 077 V2.3.1 (2022-09)

Figure 3: Spectrum masks for DAB out-of-band emissions (case 1 and case 2)
ETSI
16 ETSI EN 302 077 V2.3.1 (2022-09)

Figure 4: Spectrum masks for DAB out-of-band emissions (case 3 and case 4)
4.2.5.3 Conformance
Conformance tests as defined in clause 5.3.5 shall be carried out.
ETSI
17 ETSI EN 302 077 V2.3.1 (2022-09)
4.2.6 MCOFDM systems: ACLR performance
4.2.6.1 Definition
Adjacent channel performance required for unoccupied OFDM blocks within the MCOFDM group.
The ACLR is defined as the ratio of the mean power of the DAB signal in the OFDM block at f to the mean power of
L
the unoccupied OFDM block within the MCOFDM group.
Out-of-band emissions which fall between f and f within the MCOFDM group are not influenced by the RF system
L H
filter. Every unoccupied OFDM block within the MCOFDM group shall be subject to an ACLR limit.
4.2.6.2 Limit
For each unoccupied OFDM block within the MCOFDM group, the ACLR shall be ≥ 55 dB.
4.2.6.3 Conformance
Conformance tests as defined in clause 5.3.6 shall be carried out.
4.2.7 MCOFDM systems: MER performance
4.2.7.1 Definition
MER performance required for every occupied OFDM block within the MCOFDM group.
4.2.7.2 Limit
For every occupied OFDM block within the MCOFDM group, the MER shall be ≥ 20 dB.
4.2.7.3 Conformance
Conformance tests as defined in clause 5.3.7 shall be carried out.
4.2.8 Behaviour in case of erroneous ETI signal
4.2.8.1 Definition
Operational status of transmitter during ETI signal error (see ETSI ETS 300 799 [2], clauses 4 to 8).
4.2.8.2 Limit
The minimum requirements for DAB transmitters shall be:
• P = 4;
• Q = 40;
• M = 80.
If the input signal is absent, or if frame synchronization is not achieved, the transmitter RF signal shall be muted in line
with spurious emission limits, clause 4.2.4.2.
If frame synchronization is achieved, but CRC violations are detected, the transmitter shall offer two alternative
responses:
a) The output RF signal is not affected by sporadic single CRC violations. The output RF signal is switched off
after P CRC violations in Q frames, and switched on after M consecutive frames free from CRC violations.
ETSI
18 ETSI EN 302 077 V2.3.1 (2022-09)
b) The output RF signal is transmitted irrespective of CRC violations.
After the warming-up time of the transmitter the output RF signal shall be stable within two seconds following the
application of an error-free input signal.
4.2.8.3 Conformance
Conformanc
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