SIST EN 301 390 V2.1.1:2022

Draft ETSI EN 301 390 V2.0.0 (2021-08)

EUROPEAN STANDARD
Fixed Radio Systems;
Point-to-point and Multipoint Systems;
Unwanted emissions in the spurious domain and
receiver immunity limits at
equipment/antenna port of Digital Fixed Radio Systems

2 Draft ETSI EN 301 390 V2.0.0 (2021-08)

Reference
REN/ATTM-0452
Keywords
emission, FWS, immunity, multipoint, point-to-point
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ETSI
3 Draft ETSI EN 301 390 V2.0.0 (2021-08)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 5
Introduction . 6
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 8
3 Definition of terms, symbols and abbreviations . 9
3.1 Terms . 9
3.2 Symbols . 10
3.3 Abbreviations . 10
4 Transmitter unwanted emissions in the spurious domain at antenna port . 12
4.1 Background . 12
4.2 Limits . 12
4.2.0 Generality . 12
4.2.1 Point-to-point equipment . 12
4.2.2 Multipoint equipment . 13
4.2.3 Broadband Wireless Access equipment operating between 1 GHz and 6 GHz . 13
5 Receiver spurious emissions at the antenna port . 13
6 Spurious domain emissions test method. 13
7 Receiver immunity at antenna port . 13
7.0 Definitions . 13
7.1 Limits . 14
7.2 Receiver immunity test method . 15
Annex A (informative): Application of CEPT/ERC Recommendation 74-01 . 16
A.0 Introduction . 16
A.1 Frequency range of applicability . 16
A.2 Level limits . 18
A.3 Reference bandwidths . 19
A.4 Detailed application of the reference bandwidths reported in table A.3 . 24
A.4.0 Foreword . 24
A.4.1 P-P and P-MP systems with fundamental emissions from 30 MHz to 1 GHz. 24
A.4.2 P-P and P-MP systems with fundamental emissions from 1 GHz to 21,2 GHz . 24
A.4.3 P-P and P-MP systems with fundamental emissions above 21,2 GHz . 25
Annex B (informative): Measurement background . 26
B.1 Spectrum analyser capability . 26
B.2 Application examples . 27
History . 33

ETSI
4 Draft ETSI EN 301 390 V2.0.0 (2021-08)
Intellectual Property Rights
Essential patents
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pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI Web server (https://ipr.etsi.org/).
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
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Foreword
This draft European Standard (EN) has been produced by ETSI Technical Committee Access, Terminals, Transmission
and Multiplexing (ATTM), and is now submitted for the combined Public Enquiry and Vote phase of the ETSI
standards EN Approval Procedure.

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

Major changes with respect to previous version
This revision is consequent to 2019 revision of CEPT/ERC Recommendation 74-01 [1], which revised the resolution
bandwidth staircase for the limits of unwanted emissions in the spurious domain also for system with channel
separation higher than 28 MHz and added specific limits for "channels-aggregation" systems as defined in ETSI
EN 302 217-2 [i.7]. In addition, standing the poor penetration of multipoint systems in the so-called HDFS (High
Density Fixed Service) bands (see 5.547 in the Radio Regulations [i.12]), limits for multipoint equipment with
fundamental emission above 21,2 GHz have also been aligned to those required by CEPT/ERC Recommendation
74-01 [1].
Examples in clause B.2 have been updated as appropriate.
ETSI
5 Draft ETSI EN 301 390 V2.0.0 (2021-08)
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
6 Draft ETSI EN 301 390 V2.0.0 (2021-08)
Introduction
The term Spurious emissions is used for simplicity elsewhere in the present document but with the more broader
meaning of "unwanted emissions in the spurious domain" introduced by Recommendation ITU-R SM.329-12 [i.13] for
clarifying the Radio Regulation definitions and the application of recommended limits for all unwanted emissions; it
also recommends that spurious emissions limits apply to all unwanted emissions falling in the spurious domain.
Therefore the present document deals with limits for unwanted emissions in the spurious domain at antenna port of
Digital Fixed Radio Systems (DFRS) as defined by Recommendation ITU-R SM.329-12 [i.13] and CEPT/ERC
Recommendation 74-01 [1] and ECC Recommendation (02)05 [i.18].
Moreover it covers characteristics of immunity from interference at receiver's antenna port.
Unwanted emissions in the spurious domain and immunity performance at antenna port are also relevant to essential
requirements under article 3.2 of Directive 2014/53/EU [i.11] on Radio Equipment (RED).
Additional considerations and background for producing the present document are:
- Recommendation ITU-R SM.329-12 [i.13] considers emissions from any system, including digital modulation
and allows options for the definition of the frequency boundary between out-of-band domain and spurious
domain. It recommends different category of level limits applicable to the Fixed Service;
- Recommendation ITU-R SM.1539-1 [i.14] describes the application of the boundary concept between
out-of-band and spurious domains;
- Recommendation ITU-R F.1191-3 [i.15] define the application of Radio Regulations [i.12] and the concepts of
out-of-band, unwanted and spurious emissions to DFRS, clarify the applicability for the boundary between
out-of-band and Spurious emissions domains but maintain the same possible limit options provided by
Recommendation ITU-R SM.329-12 [i.13];
- CEPT/ERC Recommendation 74-01 [1], endorses only the more stringent Category B limits of
Recommendation ITU-R SM.329-12 [i.13];
- for the purpose of Directive 2014/53/EU [i.11] the emissions and immunity at antenna port fall under its
article 3.2 requirements for "effective use of spectrum" and "avoidance of harmful interference";
- it is convenient to maintain a single ETSI EN covering these parameters instead of replicating them on each
single product standard, avoiding possible deviation from what required by other CEPT and ITU-R normative;
- limits for unwanted emissions in the spurious domain are supposed to be fixed in view of inter-working
compatibility among various Fixed Radio Systems in same or different band exploited in the same area;
- the measurement of the required limits should also be feasible in a suitable and cost effective conformance test
(annex B gives also information in this field);
- it is necessary that DFRS receivers provide a minimum level of immunity at antenna port towards possible
interference at any frequency band of practical interest;
- a suitable and easy to perform criterion for DFRS receivers immunity at antenna port may be considered the
application of a CW interference.

ETSI
7 Draft ETSI EN 301 390 V2.0.0 (2021-08)
1 Scope
The scope of the present document is to define specific limits at antenna port for unwanted emissions in the spurious
domain and receiver immunity for suitable inter-working of Digital Fixed Radio Systems (i.e. Point-to-point and
Multipoint systems) in the same or in different frequency band whenever allocated to Fixed Service in the range 9 kHz
to 300 GHz.
However systems with fundamental emission below 30 MHz are not considered relevant for Digital Fixed Radio
Systems and are outside the scope of the present document.
The present document adopts CEPT/ERC Recommendation 74-01 [1] which gives limits for Unwanted emissions in the
Spurious domain with particular regards to "inter Services" operations.
In addition, it is recognized the need for a general requirement for receiver immunity to relatively high interference
signals generated by any source and at any frequency in the same range identified as spurious domain by CEPT/ERC
Recommendation 74-01 [1].
Some ETSI deliverables for DFRS provide limits for both "external" and "internal" spurious domain emissions and the
latter are outside the scope of the present document. Moreover the limits for emissions given in the present document do
not prevent more stringent requirement given in those deliverables for intra-system purpose (i.e. local Transmitter to
Receiver interference usually referred as "internal").
In order to help the understanding of limits given in CEPT/ERC Recommendation 74-01 [1], in annex B, unwanted
emissions in the spurious domain are analysed from the point of view of a suitable test method for conformance testing.
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 a specific reference, only the cited version applies. For a non-specific reference, 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
http://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] CEPT/ERC Recommendation 74-01 (2019): "Unwanted emissions in the spurious domain".
[2] Void.
[3] ETSI EN 301 126-1: "Fixed Radio Systems; Conformance testing; Part 1: Point-to-Point
equipment - Definitions, general requirements and test procedures".
[4] ETSI EN 301 126-2-1: "Fixed Radio Systems; Conformance testing; Part 2-1: Point-to-Multipoint
equipment; Definitions and general requirements".
[5] ETSI EN 301 126-2-2: "Fixed Radio Systems; Conformance testing; Part 2-2: Point-to-Multipoint
equipment; Test procedures for FDMA systems".
[6] ETSI EN 301 126-2-3: "Fixed Radio Systems; Conformance testing; Part 2-3: Point-to-Multipoint
equipment; Test procedures for TDMA systems".
[7] ETSI EN 301 126-2-4: "Fixed Radio Systems; Conformance testing; Part 2-4: Point-to-Multipoint
equipment; Test procedures for FH-CDMA systems".
ETSI
8 Draft ETSI EN 301 390 V2.0.0 (2021-08)
[8] ETSI EN 301 126-2-5: "Fixed Radio Systems; Conformance testing; Part 2-5: Point-to-Multipoint
equipment; Test procedures for DS-CDMA systems".
[9] ETSI EN 301 126-2-6: "Fixed Radio Systems; Conformance testing; Part 2-6: Point-to-Multipoint
equipment; Test procedures for Multi Carrier Time Division Multiple Access (MC-TDMA)
systems".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For a specific reference, only the cited version applies. For a non-specific reference, 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] Void.
[i.2] Void.
[i.3] Void.
[i.4] Void.
[i.5] Void.
[i.6] Void.
[i.7] ETSI EN 302 217-2: "Fixed Radio Systems; Characteristics and requirements for point-to-point
equipment and antennas; Part 2: Digital systems operating in frequency bands from 1 GHz to
86 GHz; Harmonised Standard for access to radio spectrum".
[i.8] ETSI EN 302 217-1: "Fixed Radio Systems; Characteristics and requirements for point-to-point
equipment and antennas; Part 1: Overview, common characteristics and requirements not related to
access to radio spectrum".
[i.9] ETSI TR 101 036-1: "Fixed Radio Systems; Generic wordings for standards on DFRS (Digital
Fixed Radio Systems) characteristics; Part 1: General aspects and point-to-point equipment
parameters".
[i.10] Recommendation ITU-R F.746-10: "Radio-frequency arrangements for fixed service systems".
[i.11] 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.12] ITU-R Radio Regulations (2020).
[i.13] Recommendation ITU-R SM.329-12: "Unwanted emissions in the spurious domain".
[i.14] Recommendation ITU-R SM.1539-1: "Variation of the boundary between the out-of-band and
spurious domains required for the application of Recommendations ITU-R SM.1541 and ITU-R
SM.329".
[i.15] Recommendation ITU-R F.1191-3: "Necessary and occupied bandwidths and unwanted emissions
of digital fixed service systems".
[i.16] ECC Report 100: "Compatibility Studies in the Band 3400- 3800 MHz between Broadband
Wireless Access (BWA) Systems and other Services".
ETSI
9 Draft ETSI EN 301 390 V2.0.0 (2021-08)
[i.17] EC REF:Ares(2019)5616840 - Further response to the EC on ERC/REC 74-01 for ETSI X-band
radar standards.
NOTE: Available as ECC(20)093 Annex 14 (CEPT website password required).
[i.18] ECC Recommendation (02)05 (2012): "Unwanted emissions".
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
boundary between out-of-band and spurious domains: frequency limit that subdivides the two domains and the
applicability of relevant requirements
NOTE: Recommendations ITU-R SM.329-12 [i.13] and SM.1539-1 [i.14] describe the possible application to all
radio emissions. Recommendation ITU-R F.1191-3 [i.15] details it for Fixed Service systems.
Broadband Wireless Access (BWA) system: access system used for the deployment of radio access networks in both
the fixed service and the mobile service
NOTE: BWA applications were introduced by ECC Report 100 [i.16] as:
"BWA systems were considered in the report, covering various BWA usage modes, i.e. Fixed (FWA),
Nomadic (NWA) and Mobile (MWA) Wireless Access".
Therefore, the technology of BWA may indifferently refer to the fixed or the mobile service regulation.
Channel Separation (CS): distance between adjacent channels in a radio frequency channels arrangement (defined in
ECC or ITU-R or national recommendations)
NOTE 1: It represents one of the major parameters for the identification of the radio equipment use and relevant
requirements.
NOTE 2: Some channel arrangements give only a continuous raster of elementary frequency slots for composing
multiple (N × elementary slot) aggregated channels of various size. In this case the actual CS would be
equal to the N × elementary slot used by the radio system. When no channel arrangement or elementary
slot raster is defined in the band of operation of the radio system, the occupied bandwidth should be
considered in substitution of the CS.
Continuous wave (CW) signal: signal with spectral emission on a single frequency only
NOTE: Unavoidable phase-noise spectral components of the CW source are not to be taken into account.
EN: European Standard (Telecommunications series)
evaluation bandwidth: bandwidth where the spurious domain emission limits are measured (e.g. the spectrum analyser
resolution bandwidth) for further normalization/integration to the reference bandwidth
Gross Symbol Frequency G : the maximum frequency of variance of the different states of the modulator
SF)
(e.g. 256 states for 256 QAM modulation formats); it is equal to the maximum (gross) bit rate (i.e. inclusive of any
payloads, control and service data, overhead and error correction codes to be transmitted) divided by the modulation
n
index "n" (e.g. n = 8 for 2 =256 in 256 QAM)
necessary bandwidth (1.152 of Radio Regulations [i.12]):
"For a given class of emission, the width of the frequency band which is just sufficient to ensure the transmission of
information at the rate and with the quality required under specified conditions"
NOTE: Recommendation ITU-R F.1191-3 [i.15] establishes that for DFRS the necessary bandwidth is considered
coincident with the occupied bandwidth.
noise-like emissions: emissions characterized by a distributed power density within the reference and evaluation
bandwidths
ETSI
10 Draft ETSI EN 301 390 V2.0.0 (2021-08)
occupied bandwidth (1.153 of Radio Regulations [i.12]):
"width of a frequency band such that, below the lower and above the upper frequency limits, the mean powers emitted
β/2 of the total mean power of a given emission (Radio Regulations [i.12])"
are each equal to a specified percentage
NOTE: For the purpose of the present document, β/2 is assumed to be equal to 0,5 % (Recommendation ITU-R
F.1191-3 [i.15]).
out-of-band domain (of an emission) (1.146A of Radio Regulations [i.12]):
"frequency range, immediately outside the necessary bandwidth but excluding the spurious domain, in which
out-of-band emissions generally predominate.
Out-of-band emissions, defined based on their source, occur in the out-of-band domain and, to a lesser extent, in the
spurious domain. Spurious emissions likewise may occur in the out-of-band domain as well as in the spurious domain.
However, the limit in the out-of-band-domain applies to any unwanted emissions independently from their formal
identification as out-of-band or spurious emissions"
receiver spurious emissions: spurious sent backwards to the antenna port by a receiver
NOTE: Sometimes they are also referenced as "spurious radiations".
reference bandwidth: bandwidth where the spurious emission limits are defined
NOTE: See also Recommendation ITU-R SM.329-12 [i.13].
spurious domain (of an emission) (1.146B of Radio Regulations [i.12]):
"frequency range beyond the out-of-band domain in which spurious emissions generally predominate.
Spurious emissions may occur in the out-of-band domain as well as in the spurious domain. Likewise out-of-band
emissions, defined based on their source, occur in the out-of-band domain and, to a lesser extent, in the spurious
domain. However, the limit in the spurious-domain applies to any unwanted emissions independently from their formal
identification as out-of-band or spurious emissions"
unwanted emissions (1.146 of Radio Regulations [i.12]):
"emissions composed by out-of-band and spurious emissions"
unwanted emissions in the out-of-band domain: any unwanted emission, outside the channel bandwidth, which falls
at frequencies separated from the centre frequency of the emission by less than 250 % (see note) of the relevant
Channel Separation (CS), where the system is intended to be used
NOTE: When CS > 500 MHz the 250 % should be substituted by (150 % CS + 500 MHz), see
CEPT/ERC Recommendation 74-01 [1].
unwanted emissions in the spurious domain : any unwanted emission which falls at frequencies separated from the
centre frequency of the emission by 250 % (see note) or more of the relevant channel separation, where the system is
intended to be used
NOTE: When CS > 500 MHz the 250 % should be substituted by (150 % CS + 500 MHz), see CEPT/ERC
Recommendation 74-01 [1].
3.2 Symbols
For the purposes of the present document, the following symbols apply:
dBc deciBels relative to carrier mean power
dBi deciBel relative to an isotropic radiator
dBm deciBels relative to milliwatt
GHz GigaHertz
kHz kiloHertz
MHz MegaHertz
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ATe external ATtenuator
ETSI
11 Draft ETSI EN 301 390 V2.0.0 (2021-08)
ATi internal spectrum analyser input ATtenuator
ATPC Automatic Transmission Power Control
BER Bit Error Rate
BS Base (Master) Station of a P-MP system
BW BandWidth
BWA Broadband Wireless Access
BWe evaluation BandWidth for spectral measurement
NOTE: I.e. spectrum analyser resolution bandwidth.
BWr reference BandWidth
CEPT Conférence Européenne des administrations des Postes et des Télécommunications
(European Conference of Postal and Telecommunications administrations)
CS Channel Separation
CW Continuous Wave
DFRS Digital Fixed Radio Systems
DUT Device Under Test
EC European Commission
ECC Electronic Communication Committee of the CEPT
EN Europäische Normung
ERC European Radiocommunications Committee of the CEPT, presently become ECC
Fc cut-off Frequency
FS Fixed Service
G Gross Symbol Frequency
SF
HDFS High Density Fixed Service
i.m.p. intermodulation products
IM InterModulation
ITU-R International Telecommunication Union - Radiocommunications standardization sector
MP MultiPoint
NOTE: Generic term including both P-MP and MP to MP mesh architectures.
NB Necessary Bandwidth
OJEU Official Journal of European Union
P-MP Point-to-MultiPoint system
P-P Point-to-Point system
QAM Quadrature Amplitude Modulation
RF Radio Frequency
RS Repeater Station (of a P-MP system)
RSL Receiver Signal Level
Rx Receiver
SM Spectrum Management
STM-0 Synchronous Transport Module Level 0
STM-1 Synchronous Transport Module Level 1
TS Terminal Station
NOTE: Remote out-station with subscriber interface of a P-MP system.
Tx Transmitter
VSWR Voltage Standing Wave Ratio
WRC World Radio Conference
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12 Draft ETSI EN 301 390 V2.0.0 (2021-08)
4 Transmitter unwanted emissions in the spurious
domain at antenna port
4.1 Background
For the purpose of the present document the terms defined in clause 3.1 are printed in "italic".
The spurious domain (of an emission) is defined in the Radio Regulations [i.12] 1.146B (see clause 3.1).
For Fixed Service (FS), CEPT/ERC Recommendation 74-01 [1] is based on Recommendation ITU-R SM.329-12 [i.13]
and its applicability to FS provided by Recommendation ITU-R F.1191-3 [i.15].
CEPT/ERC Recommendation 74-01 [1], prescribes that the spurious domain emissions limits are applied to any
unwanted emissions at frequencies which are:
≤ 500 MHz:
• For channel separations (CS)
at frequencies which are outside the [nominal] carrier frequency by more than ±250 % of the relevant CS.
• For channel separation (CS) > 500 MHz:
as given in Recommendation ITU-R SM.1539-1 [i.14] at frequencies which are outside the [nominal] carrier
frequency by more than ± (500 MHz + 150 % CS [MHz]).
According Recommendation ITU-R F.1191-3 [i.15], the Channel separation (CS) is taken as XS/2 for alternated
frequency channel arrangements and XS for co-channel and interleaved frequency channel arrangements as defined by
Recommendation ITU-R F.746-10 [i.10].
The emission within ±250 %, or in case ± (500 MHz + 150 %), of the relevant channel separation includes only
fundamental and unwanted emissions in the out-of-band domain (which are outside the scope of the present document.
The out of band domain is defined in Radio Regulations [i.12] 1.146A (see clause 3.1).
4.2 Limits
4.2.0 Generality
The unwanted emissions in the spurious domain of the transmitter and the receiver spurious emissions, delivered to the
antenna port of Fixed Radio Systems, shall be limited within the average power limits reported below.
For "noise-like" unwanted emissions, the limits are intended not to be exceeded in any elementary evaluation
bandwidth.
The limit values are defined at reference point C' shown in the general RF block diagram of figure 1.
A'
B' C' D'
Z'
Branching
Transmitter RF Tx Filter Feeder
Network
C BA Z
D
Branching
Feeder RF Rx Filter Receiver
Network
Figure 1: RF block diagram
4.2.1 Point-to-point equipment
The CEPT/ERC Recommendation 74-01 [1] and its FS specific annex 1 shall apply.
ETSI
13 Draft ETSI EN 301 390 V2.0.0 (2021-08)
For reader convenience, annex A gives the details for its application to practical systems.
4.2.2 Multipoint equipment
The CEPT/ERC Recommendation 74-01 [1] and its FS specific annex 1 shall apply.
For reader convenience, annex A gives the details for its application to practical systems.
4.2.3 Broadband Wireless Access equipment operating between 1 GHz
and 6 GHz
Broadband Wireless Access (BWA) systems are used for the deployment of radio access networks in both the fixed
service and the mobile service. They operate at frequencies up to 6 GHz and are considered to use terminal stations with
antenna gain less than about 20 dBi.
The CEPT/ERC Recommendation 74-01 [1] and its FS specific annex 1 shall apply.
For reader convenience, annex A gives the details for its application to practical systems.
5 Receiver spurious emissions at the antenna port
Receiver spurious emissions are defined in the same frequency range of transmitters spurious domain emissions,
without any exclusion band (such as the 250 % of the relevant channel separation) and are applicable at the reference
point C of figure 1.
The CEPT/ERC Recommendation 74-01 [1] and its FS specific annex 1 shall apply.
6 Spurious domain emissions test method
The measurement shall be referenced at the Tx/Rx common antenna port (reference points C-C' of figure 1).
According to the equipment physical construction, the test shall be carried on with the methodologies given, for
P-P equipment, in ETSI EN 301 126-1 [3] and, for P-MP equipment, according their access methods, in ETSI
EN 301 126-2-1 [4], ETSI EN 301 126-2-2 [5], ETSI EN 301 126-2-3 [6], ETSI EN 301 126-2-4 [7], ETSI
EN 301 126-2-5 [8] and ETSI EN 301 126-2-6 [9]. The measurement shall be carried out with transmitters set to the
higher level of continuous emission (see note) with the payloads inputs connected to a suitable test pattern, defined, for
the equipment under consideration, in the applicable ETSI deliverable, if available, or by manufacturer declaration.
In order to provide easy and cost effective Conformance Test, the measurement may be carried out with wider BWe,
provided that the results will be normalized to the required bandwidth with the methods reported in CEPT/ERC
Recommendation 74-01 [1].
NOTE: With ATPC disabled and set to the higher emission power.
7 Receiver immunity at antenna port
7.0 Definitions
The receiver immunity at antenna port is ability of a receiver to perform within a predefined degradation in the
presence, at its antenna port, of an interfering signal within a range of frequency outside its operating, first and second
adjacent channels.
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14 Draft ETSI EN 301 390 V2.0.0 (2021-08)
A suitable and easy to perform criterion is considered the application of a continuous wave CW spurious interference.
CW spurious interference sensitivity of a receiver is a measure of its ability to discriminate between the wanted signal at
the nominal channel frequency of the receiver and a CW unwanted signal at any other frequency at which a response is
obtained.
7.1 Limits
Unless different requirement were reported into a specific product ETSI deliverable, for a receiver operating at a RSL
-6
corresponding to the nominal 10 BER threshold, or any other suitable quality threshold, given by the relevant ETSI
deliverable, the introduction of a CW interferer level, with respect to the "wanted" signal, of:
a) for Point-to-point equipment operating on channel spacing lower than or equal to 14 MHz:
- +20 dB at any frequency either side of the wanted centre frequency of the RF channel from 250 % up to
500 % the channel spacing;
- +30 dB outside 500 % the channel spacing;
b) for Point-to-point equipment operating on channel spacing greater than 14 MHz and less than 500 MHz:
- +30 dB at any frequency either side of the wanted centre frequency of the RF channel outside 250 % of
the channel spacing;
c) for Point-to-point equipment operating on channel spacing equal or greater than 500 MHz:
- +30 dB at any frequency, either side of the wanted centre frequency of the RF channel, spaced more than
± (150 % of the relevant CS + 500 MHz);
d) for Multipoint equipment:
- +30 dB at any frequency either side of the wanted centre frequency of the RF channel outside 550 % of
the channel spacing;
-6
shall not result in more than 1 dB degradation of the 10 BER threshold.
The requirement above shall be fulfilled at any frequency in the range given in table 1.
However, systems having an integral antenna incorporating an unperturbed waveguide section, or with an antenna
connection in same form, and of length equal to at least twice the cut-off wavelength, will not require receiver immunity
measurement below 0,7 times the waveguide cut-off frequency; when the waveguide section is at least twenty times the
cut-off wavelength measurement below waveguide cut-off frequency are not required.
Table 1
Fundamental receiver CW Spurious Response frequency range
frequency range
Lower frequency Upper frequency (see note)
9 kHz to 100 MHz 9 kHz 1 GHz
th
100 MHz to 300 MHz 9 kHz
10 harmonic
300 MHz to 600 MHz 30 MHz 3 GHz
th
600 MHz to 5,2 GHz 30 MHz
5 harmonic
5,2 GHz to 13 GHz 30 MHz 26 GHz
nd
13 GHz to 150 GHz 30 MHz
2 harmonic
150 GHz to 300 GHz 30 MHz 300 GHz
NOTE: The test should include the entire harmonic band and not be truncated at the precise upper
frequency limit stated.
ETSI
15 Draft ETSI EN 301 390 V2.0.0 (2021-08)
7.2 Receiver immunity test method
The measurement shall be referenced at the Tx/Rx common antenna port (reference points C-C' of figure 1).
According to the equipment physical construction, the test shall be carried on with the methodologies given, for
P-P equipment, in ETSI EN 301 126-1 [3] and, for P-MP equipment, ETSI EN 301 126-2-1 [4], ETSI
EN 301 126-2-2 [5], ETSI EN 301 126-2-3 [6], ETSI EN 301 126-2-4 [7] and ETSI EN 301 126-2-5 [8].
ETSI
16 Draft ETSI EN 301 390 V2.0.0 (2021-08)
Annex A (informative):
Application of CEPT/ERC Recommendation 74-01
A.0 Introduction
The limits of the spurious domain emissions required by the present document are reported in CEPT/ERC
Recommendation 74-01 [1]; however, for reader convenience, relevant parts of this recommendation are reported and
commented below.
A.1 Frequency range of applicability
For channel separation ≤ 500 MHz, according to Recommendation ITU-R SM.329-12 [i.13] and the application to
fixed service provided by Recommendation ITU-R F.1191-3 [i.15], annex 1 of CEPT/ERC Recommendation 74-01 [1]
defines unwanted emissions in the spurious domain as any emission at frequencies which are outside the nominal carrier
frequency by more than ±250 % of the relevant channel separation.
However, for channel separation > 500 MHz, according Recommendation ITU-R SM.1539-1 [i.14], annex 1 of
CEPT/ERC Recommendation 74−01 [1], defines spurious emissions limits as any unwanted emissions at frequencies
which are outside the nominal carrier frequency by more than ± (500 MHz + 150 % of the relevant channel separation
expressed in MHz).
Whenever a channel arrangement is not present and a CS cannot be identified, limits can still consistently apply noting
that:
• Recommends 1 of CEPT/ERC Recommendation 74−01 [1], recommends that the limits: "apply at frequencies
beyond the limit of 250 % of the necessary bandwidth above and below the centre frequency of the emission".
• According recommends 2.2 of Recommendation ITU-R F.1191-3 [i.15], the Necessary Bandwidth (NB)
should be considered to have the same value as the occupied bandwidth.
• According the 1.146 of the Radio Regulations [i.12] and recommends 2.1 of Recommendation ITU-R
F.1191-3 [i.15], the occupied bandwidth for digital fixed service systems is equal to that containing the 99 %
of the emitted power.
The CEPT/ERC Recommendation 74-01 [1] requires that the limits on spurious domain emissions for radio equipment
are considered here to be applicable to the range 9 kHz to 300 GHz. However, for practical measurement purpose only,
the frequency range of spurious domain emissions may be restricted. As guidance for practical purposes, the
measurement parameters reported in table 1 and its related notes 1 and 2 of CEPT/ERC Recommendation 74-01 [1]
reprinted, for reader convenience in table A.1.
ETSI
17 Draft ETSI EN 301 390 V2.0.0 (2021-08)
Table A.1: Abstract of CEPT/ERC Recommendation 74-01 [1]
Table 1: Frequency range for measurement of unwanted emissions
Fundamental frequency Frequency range for measurements
range
Lower frequency Upper frequency (see note)
9 kHz to 100 MHz 9 kHz 1 GHz
th
100 MHz to 300 MHz 9 kHz
10 harmonic
300 MHz to 600 MHz 30 MHz 3 GHz
th
600 MHz to 5,2 GHz 30 MHz
5 harmonic
5,2 GHz to 13 GHz 30 MHz 26 GHz
nd
13 GHz to 150 GHz 30 MHz
2 harmonic
150 GHz to 300 GHz 30 MHz 300 GHz
NOTE: The test should include the entire harmonic band and not be truncated at the
precise upper frequency limit stated.

NOTE 1: The parameters in table 1 reflect the increasing difficulty in undertaking real tests at higher frequencies,
taking into account such factors as availability and usability of suitable measurement equipment. In such
cases, when systems with integral antenna would require radiated measurement, their antenna gain should
be taken into account either with separate test or with appropriate theoretical calculation. In some
circumstances, it may be necessary to extend the range of test frequencies in order to facilitate better
protection of other services, including passive services. In any case, systems having an integral antenna
incorporating a waveguide section, or with an antenna connection in such form, and of length equal to at
least twice the cut-off wavelength, should not require spurious domain emissions measurement below 0,7
times the waveguide cut-off frequency.
NOTE 2: Although measurements are outside the scope of this Recommendation, it is recognized that testing at
higher frequency may not have a defined measurement uncertainty due to absence of primary references.
In addition further simplifications of measuring techniques to achieve time/cost savings, while still
guaranteeing with fair confidence the fulfilment of the requirement may be possible.

Regarding the limitation of measurement to frequency higher than 0,7 times the waveguide cut-off frequency mentioned
in note 1, the rationale was that, with that waveguide length, lower frequencies are attenuated by more than 100 dB
according the formulas:
� �
�� ��
� � �
� =8,69× � � −� � ��⁄�
�
� �
�
Where:
� is the specific attenuation at λ free-space wavelength below cut-off;
•
�
• λ and � are the generic free-space wavelength and cut-off wavelength, respectively, expressed in meters.
�
According this relationship, the same amount of attenuation can be obtained at different frequency below cut-off
provided that a corresponding length of cut-off waveguide is provided; therefore, the ECC, in the response to a question
from EC [i.16] related to the adoption for OJEU publication of an ETSI HS, has further clarified that, to minimize the
risk of exceeding the required limit, the following should be considered:
"The roll off slope of the waveguide wi
...

SLOVENSKI STANDARD
01-februar-2022
Fiksni radijski sistemi - Sistemi točka-točka in večtočkovni sistemi - Neželena
oddajanja in omejitve odpornosti sprejemnika pri vhodu v opremo oziroma pri
antenskem vhodu digitalnih fiksnih radijskih sistemov
Fixed Radio Systems - Point-to-point and Multipoint Systems - Unwanted emissions in
the spurious domain and receiver immunity limits at equipment/antenna port of Digital
Fixed Radio Systems
Ta slovenski standard je istoveten z: ETSI EN 301 390 V2.1.1 (2021-11)
ICS:
33.060.30 Radiorelejni in fiksni satelitski Radio relay and fixed satellite
komunikacijski sistemi communications systems
33.100.10 Emisija Emission
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
Fixed Radio Systems;
Point-to-point and Multipoint Systems;
Unwanted emissions in the spurious domain and
receiver immunity limits at equipment/antenna
port of Digital Fixed Radio Systems

2 ETSI EN 301 390 V2.1.1 (2021-11)

Reference
REN/ATTM-0452
Keywords
emission, FWS, immunity, multipoint, point-to-point
ETSI
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ETSI
3 ETSI EN 301 390 V2.1.1 (2021-11)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 5
Introduction . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 7
3 Definition of terms, symbols and abbreviations . 8
3.1 Terms . 8
3.2 Symbols . 9
3.3 Abbreviations . 10
4 Transmitter unwanted emissions in the spurious domain at antenna port . 11
4.1 Background . 11
4.2 Limits . 11
4.2.0 Generality . 11
4.2.1 Point-to-point equipment . 12
4.2.2 Multipoint equipment . 12
4.2.3 Broadband Wireless Access equipment operating between 1 GHz and 6 GHz . 12
5 Receiver spurious emissions at the antenna port . 12
6 Spurious domain emissions test method. 12
7 Receiver immunity at antenna port . 12
7.0 Definitions . 12
7.1 Limits . 13
7.2 Receiver immunity test method . 14
Annex A (informative): Application of CEPT/ERC Recommendation 74-01 . 15
A.0 Introduction . 15
A.1 Frequency range of applicability . 15
A.2 Level limits . 17
A.3 Reference bandwidths . 18
A.4 Detailed application of the reference bandwidths reported in table A.3 . 23
A.4.0 Foreword . 23
A.4.1 P-P and P-MP systems with fundamental emissions from 30 MHz to 1 GHz. 23
A.4.2 P-P and P-MP systems with fundamental emissions from 1 GHz to 21,2 GHz . 23
A.4.3 P-P and P-MP systems with fundamental emissions above 21,2 GHz . 24
Annex B (informative): Measurement background . 25
B.1 Spectrum analyser capability . 25
B.2 Application examples . 26
History . 32

ETSI
4 ETSI EN 301 390 V2.1.1 (2021-11)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI Web server (https://ipr.etsi.org/).
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its

Members. 3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and of the 3GPP
Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of the ®
oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
Foreword
This European Standard (EN) has been produced by ETSI Technical Committee Access, Terminals, Transmission and
Multiplexing (ATTM).
National transposition dates
Date of adoption of this EN: 25 November 2021
Date of latest announcement of this EN (doa): 28 February 2022
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 August 2022
Date of withdrawal of any conflicting National Standard (dow): 31 August 2022

Major changes with respect to previous version
This revision is consequent to 2019 revision of CEPT/ERC Recommendation 74-01 [1], which revised the resolution
bandwidth staircase for the limits of unwanted emissions in the spurious domain also for system with channel
separation higher than 28 MHz and added specific limits for "channels-aggregation" systems as defined in ETSI
EN 302 217-2 [i.7]. In addition, standing the poor penetration of multipoint systems in the so-called HDFS (High
Density Fixed Service) bands (see 5.547 in the Radio Regulations [i.12]), limits for multipoint equipment with
fundamental emission above 21,2 GHz have also been aligned to those required by CEPT/ERC Recommendation
74-01 [1].
Examples in clause B.2 have been updated as appropriate.
ETSI
5 ETSI EN 301 390 V2.1.1 (2021-11)
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 term Spurious emissions is used for simplicity elsewhere in the present document but with the more broader
meaning of "unwanted emissions in the spurious domain" introduced by Recommendation ITU-R SM.329-12 [i.13] for
clarifying the Radio Regulation definitions and the application of recommended limits for all unwanted emissions; it
also recommends that spurious emissions limits apply to all unwanted emissions falling in the spurious domain.
Therefore the present document deals with limits for unwanted emissions in the spurious domain at antenna port of
Digital Fixed Radio Systems (DFRS) as defined by Recommendation ITU-R SM.329-12 [i.13], CEPT/ERC
Recommendation 74-01 [1] and ECC Recommendation (02)05 [i.18].
Moreover it covers characteristics of immunity from interference at receiver's antenna port.
Unwanted emissions in the spurious domain and immunity performance at antenna port are also relevant to essential
requirements under article 3.2 of Directive 2014/53/EU [i.11] on Radio Equipment (RED).
Additional considerations and background for producing the present document are:
- Recommendation ITU-R SM.329-12 [i.13] considers emissions from any system, including digital modulation
and allows options for the definition of the frequency boundary between out-of-band domain and spurious
domain. It recommends different category of level limits applicable to the Fixed Service;
- Recommendation ITU-R SM.1539-1 [i.14] describes the application of the boundary concept between
out-of-band and spurious domains;
- Recommendation ITU-R F.1191-3 [i.15] defines the application of Radio Regulations [i.12] and the concepts
of out-of-band, unwanted and spurious emissions to DFRS, clarify the applicability for the boundary between
out-of-band and Spurious emissions domains but maintain the same possible limit options provided by
Recommendation ITU-R SM.329-12 [i.13];
- CEPT/ERC Recommendation 74-01 [1] endorses only the more stringent Category B limits of
Recommendation ITU-R SM.329-12 [i.13];
- for the purpose of Directive 2014/53/EU [i.11], the emissions and immunity at antenna port fall under its
article 3.2 requirements for "effective use of spectrum" and "avoidance of harmful interference";
- it is convenient to maintain a single ETSI EN covering these parameters instead of replicating them on each
single product standard, avoiding possible deviation from what required by other CEPT and ITU-R normative;
- limits for unwanted emissions in the spurious domain are supposed to be fixed in view of inter-working
compatibility among various Fixed Radio Systems in same or different band exploited in the same area;
- the measurement of the required limits should also be feasible in a suitable and cost effective conformance test
(annex B gives also information in this field);
- it is necessary that DFRS receivers provide a minimum level of immunity at antenna port towards possible
interference at any frequency band of practical interest;
- a suitable and easy to perform criterion for DFRS receivers immunity at antenna port may be considered the
application of a CW interference.

ETSI
6 ETSI EN 301 390 V2.1.1 (2021-11)
1 Scope
The scope of the present document is to define specific limits at antenna port for unwanted emissions in the spurious
domain and receiver immunity for suitable inter-working of Digital Fixed Radio Systems (i.e. Point-to-point and
Multipoint systems) in the same or in different frequency band whenever allocated to Fixed Service in the range 9 kHz
to 300 GHz.
However systems with fundamental emission below 30 MHz are not considered relevant for Digital Fixed Radio
Systems and are outside the scope of the present document.
The present document adopts CEPT/ERC Recommendation 74-01 [1] which gives limits for Unwanted emissions in the
Spurious domain with particular regards to "inter Services" operations.
In addition, it is recognized the need for a general requirement for receiver immunity to relatively high interference
signals generated by any source and at any frequency in the same range identified as spurious domain by CEPT/ERC
Recommendation 74-01 [1].
Some ETSI deliverables for DFRS provide limits for both "external" and "internal" spurious domain emissions and the
latter are outside the scope of the present document. Moreover the limits for emissions given in the present document do
not prevent more stringent requirement given in those deliverables for intra-system purpose (i.e. local Transmitter to
Receiver interference usually referred as "internal").
In order to help the understanding of limits given in CEPT/ERC Recommendation 74-01 [1], in annex B, unwanted
emissions in the spurious domain are analysed from the point of view of a suitable test method for conformance testing.
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 a specific reference, only the cited version applies. For a non-specific reference, 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] CEPT/ERC Recommendation 74-01 (2019): "Unwanted emissions in the spurious domain".
[2] Void.
[3] ETSI EN 301 126-1: "Fixed Radio Systems; Conformance testing; Part 1: Point-to-Point
equipment - Definitions, general requirements and test procedures".
[4] ETSI EN 301 126-2-1: "Fixed Radio Systems; Conformance testing; Part 2-1: Point-to-Multipoint
equipment; Definitions and general requirements".
[5] ETSI EN 301 126-2-2: "Fixed Radio Systems; Conformance testing; Part 2-2: Point-to-Multipoint
equipment; Test procedures for FDMA systems".
[6] ETSI EN 301 126-2-3: "Fixed Radio Systems; Conformance testing; Part 2-3: Point-to-Multipoint
equipment; Test procedures for TDMA systems".
[7] ETSI EN 301 126-2-4: "Fixed Radio Systems; Conformance testing; Part 2-4: Point-to-Multipoint
equipment; Test procedures for FH-CDMA systems".
ETSI
7 ETSI EN 301 390 V2.1.1 (2021-11)
[8] ETSI EN 301 126-2-5: "Fixed Radio Systems; Conformance testing; Part 2-5: Point-to-Multipoint
equipment; Test procedures for DS-CDMA systems".
[9] ETSI EN 301 126-2-6: "Fixed Radio Systems; Conformance testing; Part 2-6: Point-to-Multipoint
equipment; Test procedures for Multi Carrier Time Division Multiple Access (MC-TDMA)
systems".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For a specific reference, only the cited version applies. For a non-specific reference, 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] Void.
[i.2] Void.
[i.3] Void.
[i.4] Void.
[i.5] Void.
[i.6] Void.
[i.7] ETSI EN 302 217-2: "Fixed Radio Systems; Characteristics and requirements for point-to-point
equipment and antennas; Part 2: Digital systems operating in frequency bands from 1 GHz to
86 GHz; Harmonised Standard for access to radio spectrum".
[i.8] ETSI EN 302 217-1: "Fixed Radio Systems; Characteristics and requirements for point-to-point
equipment and antennas; Part 1: Overview, common characteristics and requirements not related to
access to radio spectrum".
[i.9] ETSI TR 101 036-1: "Fixed Radio Systems; Generic wordings for standards on DFRS (Digital
Fixed Radio Systems) characteristics; Part 1: General aspects and point-to-point equipment
parameters".
[i.10] Recommendation ITU-R F.746-10: "Radio-frequency arrangements for fixed service systems".
[i.11] 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.12] ITU-R Radio Regulations (2020).
[i.13] Recommendation ITU-R SM.329-12: "Unwanted emissions in the spurious domain".
[i.14] Recommendation ITU-R SM.1539-1: "Variation of the boundary between the out-of-band and
spurious domains required for the application of Recommendations ITU-R SM.1541 and ITU-R
SM.329".
[i.15] Recommendation ITU-R F.1191-3: "Necessary and occupied bandwidths and unwanted emissions
of digital fixed service systems".
[i.16] ECC Report 100: "Compatibility Studies in the Band 3400- 3800 MHz between Broadband
Wireless Access (BWA) Systems and other Services".
ETSI
8 ETSI EN 301 390 V2.1.1 (2021-11)
[i.17] EC REF:Ares(2019)5616840 - Further response to the EC on ERC/REC 74-01 for ETSI X-band
radar standards.
NOTE: Available as ECC(20)093 Annex 14 (CEPT website password required).
[i.18] ECC Recommendation (02)05 (2012): "Unwanted emissions".
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
boundary between out-of-band and spurious domains: frequency limit that subdivides the two domains and the
applicability of relevant requirements
NOTE: Recommendations ITU-R SM.329-12 [i.13] and SM.1539-1 [i.14] describe the possible application to all
radio emissions. Recommendation ITU-R F.1191-3 [i.15] details it for Fixed Service systems.
Broadband Wireless Access (BWA) system: access system used for the deployment of radio access networks in both
the fixed service and the mobile service
NOTE: BWA applications were introduced by ECC Report 100 [i.16] as:
"BWA systems were considered in the report, covering various BWA usage modes, i.e. Fixed (FWA),
Nomadic (NWA) and Mobile (MWA) Wireless Access".
Therefore, the technology of BWA may indifferently refer to the fixed or the mobile service regulation.
Channel Separation (CS): distance between adjacent channels in a radio frequency channels arrangement (defined in
ECC or ITU-R or national recommendations)
NOTE 1: It represents one of the major parameters for the identification of the radio equipment use and relevant
requirements.
NOTE 2: Some channel arrangements give only a continuous raster of elementary frequency slots for composing
multiple (N × elementary slot) aggregated channels of various size. In this case the actual CS would be
equal to the N × elementary slot used by the radio system. When no channel arrangement or elementary
slot raster is defined in the band of operation of the radio system, the occupied bandwidth should be
considered in substitution of the CS.
Continuous Wave (CW) signal: signal with spectral emission on a single frequency only
NOTE: Unavoidable phase-noise spectral components of the CW source are not to be taken into account.
EN: European Standard (Telecommunications series)
evaluation bandwidth: bandwidth where the spurious domain emission limits are measured (e.g. the spectrum analyser
resolution bandwidth) for further normalization/integration to the reference bandwidth
Gross Symbol Frequency G : the maximum frequency of variance of the different states of the modulator
SF)
(e.g. 256 states for 256 QAM modulation formats); it is equal to the maximum (gross) bit rate (i.e. inclusive of any
payloads, control and service data, overhead and error correction codes to be transmitted) divided by the modulation
n
index "n" (e.g. n = 8 for 2 =256 in 256 QAM)
necessary bandwidth (1.152 of Radio Regulations [i.12]):
"For a given class of emission, the width of the frequency band which is just sufficient to ensure the transmission of
information at the rate and with the quality required under specified conditions"
NOTE: Recommendation ITU-R F.1191-3 [i.15] establishes that for DFRS the necessary bandwidth is considered
coincident with the occupied bandwidth.
noise-like emissions: emissions characterized by a distributed power density within the reference and evaluation
bandwidths
ETSI
9 ETSI EN 301 390 V2.1.1 (2021-11)
occupied bandwidth (1.153 of Radio Regulations [i.12]):
"width of a frequency band such that, below the lower and above the upper frequency limits, the mean powers emitted
are each equal to a specified percentage β/2 of the total mean power of a given emission (Radio Regulations [i.12])"
NOTE: For the purpose of the present document, β/2 is assumed to be equal to 0,5 % (Recommendation ITU-R
F.1191-3 [i.15]).
out-of-band domain (of an emission) (1.146A of Radio Regulations [i.12]):
"frequency range, immediately outside the necessary bandwidth but excluding the spurious domain, in which
out-of-band emissions generally predominate.
Out-of-band emissions, defined based on their source, occur in the out-of-band domain and, to a lesser extent, in the
spurious domain. Spurious emissions likewise may occur in the out-of-band domain as well as in the spurious domain.
However, the limit in the out-of-band-domain applies to any unwanted emissions independently from their formal
identification as out-of-band or spurious emissions"
receiver spurious emissions: spurious sent backwards to the antenna port by a receiver
NOTE: Sometimes they are also referenced as "spurious radiations".
reference bandwidth: bandwidth where the spurious emission limits are defined
NOTE: See also Recommendation ITU-R SM.329-12 [i.13].
spurious domain (of an emission) (1.146B of Radio Regulations [i.12]):
"frequency range beyond the out-of-band domain in which spurious emissions generally predominate.
Spurious emissions may occur in the out-of-band domain as well as in the spurious domain. Likewise out-of-band
emissions, defined based on their source, occur in the out-of-band domain and, to a lesser extent, in the spurious
domain. However, the limit in the spurious-domain applies to any unwanted emissions independently from their formal
identification as out-of-band or spurious emissions"
unwanted emissions (1.146 of Radio Regulations [i.12]):
"emissions composed by out-of-band and spurious emissions"
unwanted emissions in the out-of-band domain: any unwanted emission, outside the channel bandwidth, which falls
at frequencies separated from the centre frequency of the emission by less than 250 % (see note) of the relevant
Channel Separation (CS), where the system is intended to be used
NOTE: When CS > 500 MHz the 250 % should be substituted by (150 % CS + 500 MHz), see CEPT/ERC
Recommendation 74-01 [1].
unwanted emissions in the spurious domain : any unwanted emission which falls at frequencies separated from the
centre frequency of the emission by 250 % (see note) or more of the relevant channel separation, where the system is
intended to be used
NOTE: When CS > 500 MHz the 250 % should be substituted by (150 % CS + 500 MHz), see CEPT/ERC
Recommendation 74-01 [1].
3.2 Symbols
For the purposes of the present document, the following symbols apply:
dBc deciBels relative to carrier mean power
dBi deciBel relative to an isotropic radiator
dBm deciBels relative to milliwatt
GHz GigaHertz
kHz kiloHertz
MHz MegaHertz
ETSI
10 ETSI EN 301 390 V2.1.1 (2021-11)
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ATe external ATtenuator
ATi internal spectrum analyser input ATtenuator
ATPC Automatic Transmission Power Control
BER Bit Error Rate
BS Base (Master) Station of a P-MP system
BW BandWidth
BWA Broadband Wireless Access
BWe evaluation BandWidth for spectral measurement
NOTE: I.e. spectrum analyser resolution bandwidth.
BWr reference BandWidth
CEPT Conférence Européenne des administrations des Postes et des Télécommunications
(European Conference of Postal and Telecommunications administrations)
CS Channel Separation
CW Continuous Wave
DFRS Digital Fixed Radio Systems
DUT Device Under Test
EC European Commission
ECC Electronic Communication Committee of the CEPT
EN European Norm
ERC European Radiocommunications Committee of the CEPT, presently become ECC
Fc cut-off Frequency
FS Fixed Service
G Gross Symbol Frequency
SF
HDFS High Density Fixed Service
i.m.p. intermodulation products
IM InterModulation
ITU-R International Telecommunication Union - Radiocommunications standardization sector
MP MultiPoint
NOTE: Generic term including both P-MP and MP to MP mesh architectures.
NB Necessary Bandwidth
OJEU Official Journal of European Union
P-MP Point-to-MultiPoint system
P-P Point-to-Point system
QAM Quadrature Amplitude Modulation
RF Radio Frequency
RS Repeater Station (of a P-MP system)
RSL Receiver Signal Level
Rx Receiver
SM Spectrum Management
STM-0 Synchronous Transport Module Level 0
STM-1 Synchronous Transport Module Level 1
TS Terminal Station
NOTE: Remote out-station with subscriber interface of a P-MP system.
Tx Transmitter
VSWR Voltage Standing Wave Ratio
WRC World Radio Conference
ETSI
11 ETSI EN 301 390 V2.1.1 (2021-11)
4 Transmitter unwanted emissions in the spurious
domain at antenna port
4.1 Background
For the purpose of the present document the terms defined in clause 3.1 are printed in "italic".
The spurious domain (of an emission) is defined in the Radio Regulations [i.12] 1.146B (see clause 3.1).
For Fixed Service (FS), CEPT/ERC Recommendation 74-01 [1] is based on Recommendation ITU-R SM.329-12 [i.13]
and its applicability to FS provided by Recommendation ITU-R F.1191-3 [i.15].
CEPT/ERC Recommendation 74-01 [1] prescribes that the spurious domain emissions limits are applied to any
unwanted emissions at frequencies which are:
• For channel separations (CS) ≤ 500 MHz:
at frequencies which are outside the [nominal] carrier frequency by more than ±250 % of the relevant CS.
• For channel separation (CS) > 500 MHz:
as given in Recommendation ITU-R SM.1539-1 [i.14] at frequencies which are outside the [nominal] carrier
frequency by more than ± (500 MHz + 150 % CS [MHz]).
According Recommendation ITU-R F.1191-3 [i.15], the Channel separation (CS) is taken as XS/2 for alternated
frequency channel arrangements and XS for co-channel and interleaved frequency channel arrangements as defined by
Recommendation ITU-R F.746-10 [i.10].
The emission within ±250 %, or in case ± (500 MHz + 150 %), of the relevant channel separation includes only
fundamental and unwanted emissions in the out-of-band domain (which are outside the scope of the present document.
The out of band domain is defined in Radio Regulations [i.12] 1.146A (see clause 3.1).
4.2 Limits
4.2.0 Generality
The unwanted emissions in the spurious domain of the transmitter and the receiver spurious emissions, delivered to the
antenna port of Fixed Radio Systems, shall be limited within the average power limits reported below.
For "noise-like" unwanted emissions, the limits are intended not to be exceeded in any elementary evaluation
bandwidth.
The limit values are defined at reference point C' shown in the general RF block diagram of figure 1.
A'
B' C' D'
Z'
Branching
Transmitter RF Tx Filter Feeder
Network
C BA Z
D
Branching
Feeder RF Rx Filter Receiver
Network
Figure 1: RF block diagram
ETSI
12 ETSI EN 301 390 V2.1.1 (2021-11)
4.2.1 Point-to-point equipment
The CEPT/ERC Recommendation 74-01 [1] and its FS specific annex 1 shall apply.
For reader convenience, annex A gives the details for its application to practical systems.
4.2.2 Multipoint equipment
The CEPT/ERC Recommendation 74-01 [1] and its FS specific annex 1 shall apply.
For reader convenience, annex A gives the details for its application to practical systems.
4.2.3 Broadband Wireless Access equipment operating between 1 GHz
and 6 GHz
Broadband Wireless Access (BWA) systems are used for the deployment of radio access networks in both the fixed
service and the mobile service. They operate at frequencies up to 6 GHz and are considered to use terminal stations with
antenna gain less than about 20 dBi.
The CEPT/ERC Recommendation 74-01 [1] and its FS specific annex 1 shall apply.
For reader convenience, annex A gives the details for its application to practical systems.
5 Receiver spurious emissions at the antenna port
Receiver spurious emissions are defined in the same frequency range of transmitters spurious domain emissions,
without any exclusion band (such as the 250 % of the relevant channel separation) and are applicable at the reference
point C of figure 1.
The CEPT/ERC Recommendation 74-01 [1] and its FS specific annex 1 shall apply.
6 Spurious domain emissions test method
The measurement shall be referenced at the Tx/Rx common antenna port (reference points C-C' of figure 1).
According to the equipment physical construction, the test shall be carried on with the methodologies given, for
P-P equipment, in ETSI EN 301 126-1 [3] and, for P-MP equipment, according their access methods, in ETSI
EN 301 126-2-1 [4], ETSI EN 301 126-2-2 [5], ETSI EN 301 126-2-3 [6], ETSI EN 301 126-2-4 [7], ETSI
EN 301 126-2-5 [8] and ETSI EN 301 126-2-6 [9]. The measurement shall be carried out with transmitters set to the
higher level of continuous emission (see note) with the payloads inputs connected to a suitable test pattern, defined, for
the equipment under consideration, in the applicable ETSI deliverable, if available, or by manufacturer declaration.
In order to provide easy and cost effective Conformance Test, the measurement may be carried out with wider BWe,
provided that the results will be normalized to the required bandwidth with the methods reported in CEPT/ERC
Recommendation 74-01 [1].
NOTE: With ATPC disabled and set to the higher emission power.
7 Receiver immunity at antenna port
7.0 Definitions
The receiver immunity at antenna port is ability of a receiver to perform within a predefined degradation in the
presence, at its antenna port, of an interfering signal within a range of frequency outside its operating, first and second
adjacent channels.
ETSI
13 ETSI EN 301 390 V2.1.1 (2021-11)
A suitable and easy to perform criterion is considered the application of a continuous wave CW spurious interference.
CW spurious interference sensitivity of a receiver is a measure of its ability to discriminate between the wanted signal at
the nominal channel frequency of the receiver and a CW unwanted signal at any other frequency at which a response is
obtained.
7.1 Limits
Unless different requirement were reported into a specific product ETSI deliverable, for a receiver operating at a RSL
-6
corresponding to the nominal 10 BER threshold, or any other suitable quality threshold, given by the relevant ETSI
deliverable, the introduction of a CW interferer level, with respect to the "wanted" signal, of:
a) for Point-to-point equipment operating on channel spacing lower than or equal to 14 MHz:
- +20 dB at any frequency either side of the wanted centre frequency of the RF channel from 250 % up to
500 % the channel spacing;
- +30 dB outside 500 % the channel spacing;
b) for Point-to-point equipment operating on channel spacing greater than 14 MHz and less than 500 MHz:
- +30 dB at any frequency either side of the wanted centre frequency of the RF channel outside 250 % of
the channel spacing;
c) for Point-to-point equipment operating on channel spacing equal or greater than 500 MHz:
- +30 dB at any frequency, either side of the wanted centre frequency of the RF channel, spaced more than
± (150 % of the relevant CS + 500 MHz);
d) for Multipoint equipment:
- +30 dB at any frequency either side of the wanted centre frequency of the RF channel outside 550 % of
the channel spacing;
-6
shall not result in more than 1 dB degradation of the 10 BER threshold.
The requirement above shall be fulfilled at any frequency in the range given in table 1.
However, systems having an integral antenna incorporating an unperturbed waveguide section, or with an antenna
connection in same form, and of length equal to at least twice the cut-off wavelength, will not require receiver immunity
measurement below 0,7 times the waveguide cut-off frequency; when the waveguide section is at least twenty times the
cut-off wavelength measurement below waveguide cut-off frequency are not required.
Table 1
Fundamental receiver CW Spurious Response frequency range
frequency range
Lower frequency Upper frequency (see note)
9 kHz to 100 MHz 9 kHz 1 GHz
th
100 MHz to 300 MHz 9 kHz
10 harmonic
300 MHz to 600 MHz 30 MHz 3 GHz
th
600 MHz to 5,2 GHz 30 MHz
5 harmonic
5,2 GHz to 13 GHz 30 MHz 26 GHz
nd
13 GHz to 150 GHz 30 MHz
2 harmonic
150 GHz to 300 GHz 30 MHz 300 GHz
NOTE: The test should include the entire harmonic band and not be truncated at the precise upper
frequency limit stated.
ETSI
14 ETSI EN 301 390 V2.1.1 (2021-11)
7.2 Receiver immunity test method
The measurement shall be referenced at the Tx/Rx common antenna port (reference points C-C' of figure 1).
According to the equipment physical construction, the test shall be carried on with the methodologies given, for
P-P equipment, in ETSI EN 301 126-1 [3] and, for P-MP equipment, ETSI EN 301 126-2-1 [4], ETSI
EN 301 126-2-2 [5], ETSI EN 301 126-2-3 [6], ETSI EN 301 126-2-4 [7] and ETSI EN 301 126-2-5 [8].
ETSI
15 ETSI EN 301 390 V2.1.1 (2021-11)
Annex A (informative):
Application of CEPT/ERC Recommendation 74-01
A.0 Introduction
The limits of the spurious domain emissions required by the present document are reported in CEPT/ERC
Recommendation 74-01 [1]; however, for reader convenience, relevant parts of this recommendation are reported and
commented below.
A.1 Frequency range of applicability
For channel separation ≤ 500 MHz, according to Recommendation ITU-R SM.329-12 [i.13] and the application to
fixed service provided by Recommendation ITU-R F.1191-3 [i.15], annex 1 of CEPT/ERC Recommendation 74-01 [1]
defines unwanted emissions in the spurious domain as any emission at frequencies which are outside the nominal carrier
frequency by more than ±250 % of the relevant channel separation.
However, for channel separation > 500 MHz, according Recommendation ITU-R SM.1539-1 [i.14], annex 1 of
CEPT/ERC Recommendation 74−01 [1], defines spurious emissions limits as any unwanted emissions at frequencies
which are outside the nominal carrier frequency by more than ± (500 MHz + 150 % of the relevant channel separation
expressed in MHz).
Whenever a channel arrangement is not present and a CS cannot be identified, limits can still consistently apply noting
that:
• Recommends 1 of CEPT/ERC Recommendation 74−01 [1], recommends that the limits: "apply at frequencies
beyond the limit of 250 % of the necessary bandwidth above and below the centre frequency of the emission".
• According recommends 2.2 of Recommendation ITU-R F.1191-3 [i.15], the Necessary Bandwidth (NB)
should be considered to have the same value as the occupied bandwidth.
• According the 1.146 of the Radio Regulations [i.12] and recommends 2.1 of Recommendation ITU-R
F.1191-3 [i.15], the occupied bandwidth for digital fixed service systems is equal to that containing the 99 %
of the emitted power.
The CEPT/ERC Recommendation 74-01 [1] requires that the limits on spurious domain emissions for radio equipment
are considered here to be applicable to the range 9 kHz to 300 GHz. However, for practical measurement purpose only,
the frequency range of spurious domain emissions may be restricted. As guidance for practical purposes, the
measurement parameters reported in table 1 and its related notes 1 and 2 of CEPT/ERC Recommendation 74-01 [1]
reprinted, for reader convenience in table A.1.
ETSI
16 ETSI EN 301 390 V2.1.1 (2021-11)
Table A.1: Abstract of CEPT/ERC Recommendation 74-01 [1]
Table 1: Frequency range for measurement of unwanted emissions
Fundamental frequency Frequency range for measurements
range
Lower frequency Upper frequency (see note)
9 kHz to 100 MHz 9 kHz 1 GHz
th
100 MHz to 300 MHz 9 kHz
10 harmonic
300 MHz to 600 MHz 30 MHz 3 GHz
th
600 MHz to 5,2 GHz 30 MHz
5 harmonic
5,2 GHz to 13 GHz 30 MHz 26 GHz
nd
13 GHz to 150 GHz 30 MHz
2 harmonic
150 GHz to 300 GHz 30 MHz 300 GHz
NOTE: The test should include the entire harmonic band and not be truncated at the
precise upper frequency limit stated.

NOTE 1: The parameters in table 1 reflect the increasing difficulty in undertaking real tests at higher frequencies,
taking into account such factors as availability and usability of suitable measurement equipment. In such
cases, when systems with integral antenna would require radiated measurement, their antenna gain should
be taken into account either with separate test or with appropriate theoretical calculation. In some
circumstances, it may be necessary to extend the range of test frequencies in order to facilitate better
protection of other services, including passive services. In any case, systems having an integral antenna
incorporating a waveguide section, or with an antenna connection in such form, and of length equal to at
least twice the cut-off wavelength, should not require spurious domain emissions measurement below
0,7 times the waveguide cut-off frequency.
NOTE 2: Although measurements are outside the scope of this Recommendation, it is recognized that testing at
higher frequency may not have a defined measurement uncertainty due to absence of primary references.
In addition
...

SLOVENSKI STANDARD
01-februar-2022
Fiksni radijski sistemi - Sistemi točka-točka in večtočkovni sistemi - Neželena
oddajanja v nehoteni domeni in omejitve odpornosti sprejemnika pri portu
opreme/antene digitalnih fiksnih radijskih sistemov
Fixed Radio Systems - Point-to-point and Multipoint Systems - Unwanted emissions in
the spurious domain and receiver immunity limits at equipment/antenna port of Digital
Fixed Radio Systems
Ta slovenski standard je istoveten z: ETSI EN 301 390 V2.1.1 (2021-11)
ICS:
33.060.30 Radiorelejni in fiksni satelitski Radio relay and fixed satellite
komunikacijski sistemi communications systems
33.100.10 Emisija Emission
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
Fixed Radio Systems;
Point-to-point and Multipoint Systems;
Unwanted emissions in the spurious domain and
receiver immunity limits at equipment/antenna
port of Digital Fixed Radio Systems

2 ETSI EN 301 390 V2.1.1 (2021-11)

Reference
REN/ATTM-0452
Keywords
emission, FWS, immunity, multipoint, point-to-point
ETSI
650 Route des Lucioles
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Tel.: +33 4 92 94 42 00  Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - APE 7112B
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° w061004871

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ETSI
3 ETSI EN 301 390 V2.1.1 (2021-11)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 5
Introduction . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 7
3 Definition of terms, symbols and abbreviations . 8
3.1 Terms . 8
3.2 Symbols . 9
3.3 Abbreviations . 10
4 Transmitter unwanted emissions in the spurious domain at antenna port . 11
4.1 Background . 11
4.2 Limits . 11
4.2.0 Generality . 11
4.2.1 Point-to-point equipment . 12
4.2.2 Multipoint equipment . 12
4.2.3 Broadband Wireless Access equipment operating between 1 GHz and 6 GHz . 12
5 Receiver spurious emissions at the antenna port . 12
6 Spurious domain emissions test method. 12
7 Receiver immunity at antenna port . 12
7.0 Definitions . 12
7.1 Limits . 13
7.2 Receiver immunity test method . 14
Annex A (informative): Application of CEPT/ERC Recommendation 74-01 . 15
A.0 Introduction . 15
A.1 Frequency range of applicability . 15
A.2 Level limits . 17
A.3 Reference bandwidths . 18
A.4 Detailed application of the reference bandwidths reported in table A.3 . 23
A.4.0 Foreword . 23
A.4.1 P-P and P-MP systems with fundamental emissions from 30 MHz to 1 GHz. 23
A.4.2 P-P and P-MP systems with fundamental emissions from 1 GHz to 21,2 GHz . 23
A.4.3 P-P and P-MP systems with fundamental emissions above 21,2 GHz . 24
Annex B (informative): Measurement background . 25
B.1 Spectrum analyser capability . 25
B.2 Application examples . 26
History . 32

ETSI
4 ETSI EN 301 390 V2.1.1 (2021-11)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI Web server (https://ipr.etsi.org/).
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its

Members. 3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and of the 3GPP
Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of the ®
oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
Foreword
This European Standard (EN) has been produced by ETSI Technical Committee Access, Terminals, Transmission and
Multiplexing (ATTM).
National transposition dates
Date of adoption of this EN: 25 November 2021
Date of latest announcement of this EN (doa): 28 February 2022
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 August 2022
Date of withdrawal of any conflicting National Standard (dow): 31 August 2022

Major changes with respect to previous version
This revision is consequent to 2019 revision of CEPT/ERC Recommendation 74-01 [1], which revised the resolution
bandwidth staircase for the limits of unwanted emissions in the spurious domain also for system with channel
separation higher than 28 MHz and added specific limits for "channels-aggregation" systems as defined in ETSI
EN 302 217-2 [i.7]. In addition, standing the poor penetration of multipoint systems in the so-called HDFS (High
Density Fixed Service) bands (see 5.547 in the Radio Regulations [i.12]), limits for multipoint equipment with
fundamental emission above 21,2 GHz have also been aligned to those required by CEPT/ERC Recommendation
74-01 [1].
Examples in clause B.2 have been updated as appropriate.
ETSI
5 ETSI EN 301 390 V2.1.1 (2021-11)
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 term Spurious emissions is used for simplicity elsewhere in the present document but with the more broader
meaning of "unwanted emissions in the spurious domain" introduced by Recommendation ITU-R SM.329-12 [i.13] for
clarifying the Radio Regulation definitions and the application of recommended limits for all unwanted emissions; it
also recommends that spurious emissions limits apply to all unwanted emissions falling in the spurious domain.
Therefore the present document deals with limits for unwanted emissions in the spurious domain at antenna port of
Digital Fixed Radio Systems (DFRS) as defined by Recommendation ITU-R SM.329-12 [i.13], CEPT/ERC
Recommendation 74-01 [1] and ECC Recommendation (02)05 [i.18].
Moreover it covers characteristics of immunity from interference at receiver's antenna port.
Unwanted emissions in the spurious domain and immunity performance at antenna port are also relevant to essential
requirements under article 3.2 of Directive 2014/53/EU [i.11] on Radio Equipment (RED).
Additional considerations and background for producing the present document are:
- Recommendation ITU-R SM.329-12 [i.13] considers emissions from any system, including digital modulation
and allows options for the definition of the frequency boundary between out-of-band domain and spurious
domain. It recommends different category of level limits applicable to the Fixed Service;
- Recommendation ITU-R SM.1539-1 [i.14] describes the application of the boundary concept between
out-of-band and spurious domains;
- Recommendation ITU-R F.1191-3 [i.15] defines the application of Radio Regulations [i.12] and the concepts
of out-of-band, unwanted and spurious emissions to DFRS, clarify the applicability for the boundary between
out-of-band and Spurious emissions domains but maintain the same possible limit options provided by
Recommendation ITU-R SM.329-12 [i.13];
- CEPT/ERC Recommendation 74-01 [1] endorses only the more stringent Category B limits of
Recommendation ITU-R SM.329-12 [i.13];
- for the purpose of Directive 2014/53/EU [i.11], the emissions and immunity at antenna port fall under its
article 3.2 requirements for "effective use of spectrum" and "avoidance of harmful interference";
- it is convenient to maintain a single ETSI EN covering these parameters instead of replicating them on each
single product standard, avoiding possible deviation from what required by other CEPT and ITU-R normative;
- limits for unwanted emissions in the spurious domain are supposed to be fixed in view of inter-working
compatibility among various Fixed Radio Systems in same or different band exploited in the same area;
- the measurement of the required limits should also be feasible in a suitable and cost effective conformance test
(annex B gives also information in this field);
- it is necessary that DFRS receivers provide a minimum level of immunity at antenna port towards possible
interference at any frequency band of practical interest;
- a suitable and easy to perform criterion for DFRS receivers immunity at antenna port may be considered the
application of a CW interference.

ETSI
6 ETSI EN 301 390 V2.1.1 (2021-11)
1 Scope
The scope of the present document is to define specific limits at antenna port for unwanted emissions in the spurious
domain and receiver immunity for suitable inter-working of Digital Fixed Radio Systems (i.e. Point-to-point and
Multipoint systems) in the same or in different frequency band whenever allocated to Fixed Service in the range 9 kHz
to 300 GHz.
However systems with fundamental emission below 30 MHz are not considered relevant for Digital Fixed Radio
Systems and are outside the scope of the present document.
The present document adopts CEPT/ERC Recommendation 74-01 [1] which gives limits for Unwanted emissions in the
Spurious domain with particular regards to "inter Services" operations.
In addition, it is recognized the need for a general requirement for receiver immunity to relatively high interference
signals generated by any source and at any frequency in the same range identified as spurious domain by CEPT/ERC
Recommendation 74-01 [1].
Some ETSI deliverables for DFRS provide limits for both "external" and "internal" spurious domain emissions and the
latter are outside the scope of the present document. Moreover the limits for emissions given in the present document do
not prevent more stringent requirement given in those deliverables for intra-system purpose (i.e. local Transmitter to
Receiver interference usually referred as "internal").
In order to help the understanding of limits given in CEPT/ERC Recommendation 74-01 [1], in annex B, unwanted
emissions in the spurious domain are analysed from the point of view of a suitable test method for conformance testing.
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 a specific reference, only the cited version applies. For a non-specific reference, 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] CEPT/ERC Recommendation 74-01 (2019): "Unwanted emissions in the spurious domain".
[2] Void.
[3] ETSI EN 301 126-1: "Fixed Radio Systems; Conformance testing; Part 1: Point-to-Point
equipment - Definitions, general requirements and test procedures".
[4] ETSI EN 301 126-2-1: "Fixed Radio Systems; Conformance testing; Part 2-1: Point-to-Multipoint
equipment; Definitions and general requirements".
[5] ETSI EN 301 126-2-2: "Fixed Radio Systems; Conformance testing; Part 2-2: Point-to-Multipoint
equipment; Test procedures for FDMA systems".
[6] ETSI EN 301 126-2-3: "Fixed Radio Systems; Conformance testing; Part 2-3: Point-to-Multipoint
equipment; Test procedures for TDMA systems".
[7] ETSI EN 301 126-2-4: "Fixed Radio Systems; Conformance testing; Part 2-4: Point-to-Multipoint
equipment; Test procedures for FH-CDMA systems".
ETSI
7 ETSI EN 301 390 V2.1.1 (2021-11)
[8] ETSI EN 301 126-2-5: "Fixed Radio Systems; Conformance testing; Part 2-5: Point-to-Multipoint
equipment; Test procedures for DS-CDMA systems".
[9] ETSI EN 301 126-2-6: "Fixed Radio Systems; Conformance testing; Part 2-6: Point-to-Multipoint
equipment; Test procedures for Multi Carrier Time Division Multiple Access (MC-TDMA)
systems".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For a specific reference, only the cited version applies. For a non-specific reference, 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] Void.
[i.2] Void.
[i.3] Void.
[i.4] Void.
[i.5] Void.
[i.6] Void.
[i.7] ETSI EN 302 217-2: "Fixed Radio Systems; Characteristics and requirements for point-to-point
equipment and antennas; Part 2: Digital systems operating in frequency bands from 1 GHz to
86 GHz; Harmonised Standard for access to radio spectrum".
[i.8] ETSI EN 302 217-1: "Fixed Radio Systems; Characteristics and requirements for point-to-point
equipment and antennas; Part 1: Overview, common characteristics and requirements not related to
access to radio spectrum".
[i.9] ETSI TR 101 036-1: "Fixed Radio Systems; Generic wordings for standards on DFRS (Digital
Fixed Radio Systems) characteristics; Part 1: General aspects and point-to-point equipment
parameters".
[i.10] Recommendation ITU-R F.746-10: "Radio-frequency arrangements for fixed service systems".
[i.11] 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.12] ITU-R Radio Regulations (2020).
[i.13] Recommendation ITU-R SM.329-12: "Unwanted emissions in the spurious domain".
[i.14] Recommendation ITU-R SM.1539-1: "Variation of the boundary between the out-of-band and
spurious domains required for the application of Recommendations ITU-R SM.1541 and ITU-R
SM.329".
[i.15] Recommendation ITU-R F.1191-3: "Necessary and occupied bandwidths and unwanted emissions
of digital fixed service systems".
[i.16] ECC Report 100: "Compatibility Studies in the Band 3400- 3800 MHz between Broadband
Wireless Access (BWA) Systems and other Services".
ETSI
8 ETSI EN 301 390 V2.1.1 (2021-11)
[i.17] EC REF:Ares(2019)5616840 - Further response to the EC on ERC/REC 74-01 for ETSI X-band
radar standards.
NOTE: Available as ECC(20)093 Annex 14 (CEPT website password required).
[i.18] ECC Recommendation (02)05 (2012): "Unwanted emissions".
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
boundary between out-of-band and spurious domains: frequency limit that subdivides the two domains and the
applicability of relevant requirements
NOTE: Recommendations ITU-R SM.329-12 [i.13] and SM.1539-1 [i.14] describe the possible application to all
radio emissions. Recommendation ITU-R F.1191-3 [i.15] details it for Fixed Service systems.
Broadband Wireless Access (BWA) system: access system used for the deployment of radio access networks in both
the fixed service and the mobile service
NOTE: BWA applications were introduced by ECC Report 100 [i.16] as:
"BWA systems were considered in the report, covering various BWA usage modes, i.e. Fixed (FWA),
Nomadic (NWA) and Mobile (MWA) Wireless Access".
Therefore, the technology of BWA may indifferently refer to the fixed or the mobile service regulation.
Channel Separation (CS): distance between adjacent channels in a radio frequency channels arrangement (defined in
ECC or ITU-R or national recommendations)
NOTE 1: It represents one of the major parameters for the identification of the radio equipment use and relevant
requirements.
NOTE 2: Some channel arrangements give only a continuous raster of elementary frequency slots for composing
multiple (N × elementary slot) aggregated channels of various size. In this case the actual CS would be
equal to the N × elementary slot used by the radio system. When no channel arrangement or elementary
slot raster is defined in the band of operation of the radio system, the occupied bandwidth should be
considered in substitution of the CS.
Continuous Wave (CW) signal: signal with spectral emission on a single frequency only
NOTE: Unavoidable phase-noise spectral components of the CW source are not to be taken into account.
EN: European Standard (Telecommunications series)
evaluation bandwidth: bandwidth where the spurious domain emission limits are measured (e.g. the spectrum analyser
resolution bandwidth) for further normalization/integration to the reference bandwidth
Gross Symbol Frequency G : the maximum frequency of variance of the different states of the modulator
SF)
(e.g. 256 states for 256 QAM modulation formats); it is equal to the maximum (gross) bit rate (i.e. inclusive of any
payloads, control and service data, overhead and error correction codes to be transmitted) divided by the modulation
n
index "n" (e.g. n = 8 for 2 =256 in 256 QAM)
necessary bandwidth (1.152 of Radio Regulations [i.12]):
"For a given class of emission, the width of the frequency band which is just sufficient to ensure the transmission of
information at the rate and with the quality required under specified conditions"
NOTE: Recommendation ITU-R F.1191-3 [i.15] establishes that for DFRS the necessary bandwidth is considered
coincident with the occupied bandwidth.
noise-like emissions: emissions characterized by a distributed power density within the reference and evaluation
bandwidths
ETSI
9 ETSI EN 301 390 V2.1.1 (2021-11)
occupied bandwidth (1.153 of Radio Regulations [i.12]):
"width of a frequency band such that, below the lower and above the upper frequency limits, the mean powers emitted
are each equal to a specified percentage β/2 of the total mean power of a given emission (Radio Regulations [i.12])"
NOTE: For the purpose of the present document, β/2 is assumed to be equal to 0,5 % (Recommendation ITU-R
F.1191-3 [i.15]).
out-of-band domain (of an emission) (1.146A of Radio Regulations [i.12]):
"frequency range, immediately outside the necessary bandwidth but excluding the spurious domain, in which
out-of-band emissions generally predominate.
Out-of-band emissions, defined based on their source, occur in the out-of-band domain and, to a lesser extent, in the
spurious domain. Spurious emissions likewise may occur in the out-of-band domain as well as in the spurious domain.
However, the limit in the out-of-band-domain applies to any unwanted emissions independently from their formal
identification as out-of-band or spurious emissions"
receiver spurious emissions: spurious sent backwards to the antenna port by a receiver
NOTE: Sometimes they are also referenced as "spurious radiations".
reference bandwidth: bandwidth where the spurious emission limits are defined
NOTE: See also Recommendation ITU-R SM.329-12 [i.13].
spurious domain (of an emission) (1.146B of Radio Regulations [i.12]):
"frequency range beyond the out-of-band domain in which spurious emissions generally predominate.
Spurious emissions may occur in the out-of-band domain as well as in the spurious domain. Likewise out-of-band
emissions, defined based on their source, occur in the out-of-band domain and, to a lesser extent, in the spurious
domain. However, the limit in the spurious-domain applies to any unwanted emissions independently from their formal
identification as out-of-band or spurious emissions"
unwanted emissions (1.146 of Radio Regulations [i.12]):
"emissions composed by out-of-band and spurious emissions"
unwanted emissions in the out-of-band domain: any unwanted emission, outside the channel bandwidth, which falls
at frequencies separated from the centre frequency of the emission by less than 250 % (see note) of the relevant
Channel Separation (CS), where the system is intended to be used
NOTE: When CS > 500 MHz the 250 % should be substituted by (150 % CS + 500 MHz), see CEPT/ERC
Recommendation 74-01 [1].
unwanted emissions in the spurious domain : any unwanted emission which falls at frequencies separated from the
centre frequency of the emission by 250 % (see note) or more of the relevant channel separation, where the system is
intended to be used
NOTE: When CS > 500 MHz the 250 % should be substituted by (150 % CS + 500 MHz), see CEPT/ERC
Recommendation 74-01 [1].
3.2 Symbols
For the purposes of the present document, the following symbols apply:
dBc deciBels relative to carrier mean power
dBi deciBel relative to an isotropic radiator
dBm deciBels relative to milliwatt
GHz GigaHertz
kHz kiloHertz
MHz MegaHertz
ETSI
10 ETSI EN 301 390 V2.1.1 (2021-11)
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ATe external ATtenuator
ATi internal spectrum analyser input ATtenuator
ATPC Automatic Transmission Power Control
BER Bit Error Rate
BS Base (Master) Station of a P-MP system
BW BandWidth
BWA Broadband Wireless Access
BWe evaluation BandWidth for spectral measurement
NOTE: I.e. spectrum analyser resolution bandwidth.
BWr reference BandWidth
CEPT Conférence Européenne des administrations des Postes et des Télécommunications
(European Conference of Postal and Telecommunications administrations)
CS Channel Separation
CW Continuous Wave
DFRS Digital Fixed Radio Systems
DUT Device Under Test
EC European Commission
ECC Electronic Communication Committee of the CEPT
EN European Norm
ERC European Radiocommunications Committee of the CEPT, presently become ECC
Fc cut-off Frequency
FS Fixed Service
G Gross Symbol Frequency
SF
HDFS High Density Fixed Service
i.m.p. intermodulation products
IM InterModulation
ITU-R International Telecommunication Union - Radiocommunications standardization sector
MP MultiPoint
NOTE: Generic term including both P-MP and MP to MP mesh architectures.
NB Necessary Bandwidth
OJEU Official Journal of European Union
P-MP Point-to-MultiPoint system
P-P Point-to-Point system
QAM Quadrature Amplitude Modulation
RF Radio Frequency
RS Repeater Station (of a P-MP system)
RSL Receiver Signal Level
Rx Receiver
SM Spectrum Management
STM-0 Synchronous Transport Module Level 0
STM-1 Synchronous Transport Module Level 1
TS Terminal Station
NOTE: Remote out-station with subscriber interface of a P-MP system.
Tx Transmitter
VSWR Voltage Standing Wave Ratio
WRC World Radio Conference
ETSI
11 ETSI EN 301 390 V2.1.1 (2021-11)
4 Transmitter unwanted emissions in the spurious
domain at antenna port
4.1 Background
For the purpose of the present document the terms defined in clause 3.1 are printed in "italic".
The spurious domain (of an emission) is defined in the Radio Regulations [i.12] 1.146B (see clause 3.1).
For Fixed Service (FS), CEPT/ERC Recommendation 74-01 [1] is based on Recommendation ITU-R SM.329-12 [i.13]
and its applicability to FS provided by Recommendation ITU-R F.1191-3 [i.15].
CEPT/ERC Recommendation 74-01 [1] prescribes that the spurious domain emissions limits are applied to any
unwanted emissions at frequencies which are:
• For channel separations (CS) ≤ 500 MHz:
at frequencies which are outside the [nominal] carrier frequency by more than ±250 % of the relevant CS.
• For channel separation (CS) > 500 MHz:
as given in Recommendation ITU-R SM.1539-1 [i.14] at frequencies which are outside the [nominal] carrier
frequency by more than ± (500 MHz + 150 % CS [MHz]).
According Recommendation ITU-R F.1191-3 [i.15], the Channel separation (CS) is taken as XS/2 for alternated
frequency channel arrangements and XS for co-channel and interleaved frequency channel arrangements as defined by
Recommendation ITU-R F.746-10 [i.10].
The emission within ±250 %, or in case ± (500 MHz + 150 %), of the relevant channel separation includes only
fundamental and unwanted emissions in the out-of-band domain (which are outside the scope of the present document.
The out of band domain is defined in Radio Regulations [i.12] 1.146A (see clause 3.1).
4.2 Limits
4.2.0 Generality
The unwanted emissions in the spurious domain of the transmitter and the receiver spurious emissions, delivered to the
antenna port of Fixed Radio Systems, shall be limited within the average power limits reported below.
For "noise-like" unwanted emissions, the limits are intended not to be exceeded in any elementary evaluation
bandwidth.
The limit values are defined at reference point C' shown in the general RF block diagram of figure 1.
A'
B' C' D'
Z'
Branching
Transmitter RF Tx Filter Feeder
Network
C BA Z
D
Branching
Feeder RF Rx Filter Receiver
Network
Figure 1: RF block diagram
ETSI
12 ETSI EN 301 390 V2.1.1 (2021-11)
4.2.1 Point-to-point equipment
The CEPT/ERC Recommendation 74-01 [1] and its FS specific annex 1 shall apply.
For reader convenience, annex A gives the details for its application to practical systems.
4.2.2 Multipoint equipment
The CEPT/ERC Recommendation 74-01 [1] and its FS specific annex 1 shall apply.
For reader convenience, annex A gives the details for its application to practical systems.
4.2.3 Broadband Wireless Access equipment operating between 1 GHz
and 6 GHz
Broadband Wireless Access (BWA) systems are used for the deployment of radio access networks in both the fixed
service and the mobile service. They operate at frequencies up to 6 GHz and are considered to use terminal stations with
antenna gain less than about 20 dBi.
The CEPT/ERC Recommendation 74-01 [1] and its FS specific annex 1 shall apply.
For reader convenience, annex A gives the details for its application to practical systems.
5 Receiver spurious emissions at the antenna port
Receiver spurious emissions are defined in the same frequency range of transmitters spurious domain emissions,
without any exclusion band (such as the 250 % of the relevant channel separation) and are applicable at the reference
point C of figure 1.
The CEPT/ERC Recommendation 74-01 [1] and its FS specific annex 1 shall apply.
6 Spurious domain emissions test method
The measurement shall be referenced at the Tx/Rx common antenna port (reference points C-C' of figure 1).
According to the equipment physical construction, the test shall be carried on with the methodologies given, for
P-P equipment, in ETSI EN 301 126-1 [3] and, for P-MP equipment, according their access methods, in ETSI
EN 301 126-2-1 [4], ETSI EN 301 126-2-2 [5], ETSI EN 301 126-2-3 [6], ETSI EN 301 126-2-4 [7], ETSI
EN 301 126-2-5 [8] and ETSI EN 301 126-2-6 [9]. The measurement shall be carried out with transmitters set to the
higher level of continuous emission (see note) with the payloads inputs connected to a suitable test pattern, defined, for
the equipment under consideration, in the applicable ETSI deliverable, if available, or by manufacturer declaration.
In order to provide easy and cost effective Conformance Test, the measurement may be carried out with wider BWe,
provided that the results will be normalized to the required bandwidth with the methods reported in CEPT/ERC
Recommendation 74-01 [1].
NOTE: With ATPC disabled and set to the higher emission power.
7 Receiver immunity at antenna port
7.0 Definitions
The receiver immunity at antenna port is ability of a receiver to perform within a predefined degradation in the
presence, at its antenna port, of an interfering signal within a range of frequency outside its operating, first and second
adjacent channels.
ETSI
13 ETSI EN 301 390 V2.1.1 (2021-11)
A suitable and easy to perform criterion is considered the application of a continuous wave CW spurious interference.
CW spurious interference sensitivity of a receiver is a measure of its ability to discriminate between the wanted signal at
the nominal channel frequency of the receiver and a CW unwanted signal at any other frequency at which a response is
obtained.
7.1 Limits
Unless different requirement were reported into a specific product ETSI deliverable, for a receiver operating at a RSL
-6
corresponding to the nominal 10 BER threshold, or any other suitable quality threshold, given by the relevant ETSI
deliverable, the introduction of a CW interferer level, with respect to the "wanted" signal, of:
a) for Point-to-point equipment operating on channel spacing lower than or equal to 14 MHz:
- +20 dB at any frequency either side of the wanted centre frequency of the RF channel from 250 % up to
500 % the channel spacing;
- +30 dB outside 500 % the channel spacing;
b) for Point-to-point equipment operating on channel spacing greater than 14 MHz and less than 500 MHz:
- +30 dB at any frequency either side of the wanted centre frequency of the RF channel outside 250 % of
the channel spacing;
c) for Point-to-point equipment operating on channel spacing equal or greater than 500 MHz:
- +30 dB at any frequency, either side of the wanted centre frequency of the RF channel, spaced more than
± (150 % of the relevant CS + 500 MHz);
d) for Multipoint equipment:
- +30 dB at any frequency either side of the wanted centre frequency of the RF channel outside 550 % of
the channel spacing;
-6
shall not result in more than 1 dB degradation of the 10 BER threshold.
The requirement above shall be fulfilled at any frequency in the range given in table 1.
However, systems having an integral antenna incorporating an unperturbed waveguide section, or with an antenna
connection in same form, and of length equal to at least twice the cut-off wavelength, will not require receiver immunity
measurement below 0,7 times the waveguide cut-off frequency; when the waveguide section is at least twenty times the
cut-off wavelength measurement below waveguide cut-off frequency are not required.
Table 1
Fundamental receiver CW Spurious Response frequency range
frequency range
Lower frequency Upper frequency (see note)
9 kHz to 100 MHz 9 kHz 1 GHz
th
100 MHz to 300 MHz 9 kHz
10 harmonic
300 MHz to 600 MHz 30 MHz 3 GHz
th
600 MHz to 5,2 GHz 30 MHz
5 harmonic
5,2 GHz to 13 GHz 30 MHz 26 GHz
nd
13 GHz to 150 GHz 30 MHz
2 harmonic
150 GHz to 300 GHz 30 MHz 300 GHz
NOTE: The test should include the entire harmonic band and not be truncated at the precise upper
frequency limit stated.
ETSI
14 ETSI EN 301 390 V2.1.1 (2021-11)
7.2 Receiver immunity test method
The measurement shall be referenced at the Tx/Rx common antenna port (reference points C-C' of figure 1).
According to the equipment physical construction, the test shall be carried on with the methodologies given, for
P-P equipment, in ETSI EN 301 126-1 [3] and, for P-MP equipment, ETSI EN 301 126-2-1 [4], ETSI
EN 301 126-2-2 [5], ETSI EN 301 126-2-3 [6], ETSI EN 301 126-2-4 [7] and ETSI EN 301 126-2-5 [8].
ETSI
15 ETSI EN 301 390 V2.1.1 (2021-11)
Annex A (informative):
Application of CEPT/ERC Recommendation 74-01
A.0 Introduction
The limits of the spurious domain emissions required by the present document are reported in CEPT/ERC
Recommendation 74-01 [1]; however, for reader convenience, relevant parts of this recommendation are reported and
commented below.
A.1 Frequency range of applicability
For channel separation ≤ 500 MHz, according to Recommendation ITU-R SM.329-12 [i.13] and the application to
fixed service provided by Recommendation ITU-R F.1191-3 [i.15], annex 1 of CEPT/ERC Recommendation 74-01 [1]
defines unwanted emissions in the spurious domain as any emission at frequencies which are outside the nominal carrier
frequency by more than ±250 % of the relevant channel separation.
However, for channel separation > 500 MHz, according Recommendation ITU-R SM.1539-1 [i.14], annex 1 of
CEPT/ERC Recommendation 74−01 [1], defines spurious emissions limits as any unwanted emissions at frequencies
which are outside the nominal carrier frequency by more than ± (500 MHz + 150 % of the relevant channel separation
expressed in MHz).
Whenever a channel arrangement is not present and a CS cannot be identified, limits can still consistently apply noting
that:
• Recommends 1 of CEPT/ERC Recommendation 74−01 [1], recommends that the limits: "apply at frequencies
beyond the limit of 250 % of the necessary bandwidth above and below the centre frequency of the emission".
• According recommends 2.2 of Recommendation ITU-R F.1191-3 [i.15], the Necessary Bandwidth (NB)
should be considered to have the same value as the occupied bandwidth.
• According the 1.146 of the Radio Regulations [i.12] and recommends 2.1 of Recommendation ITU-R
F.1191-3 [i.15], the occupied bandwidth for digital fixed service systems is equal to that containing the 99 %
of the emitted power.
The CEPT/ERC Recommendation 74-01 [1] requires that the limits on spurious domain emissions for radio equipment
are considered here to be applicable to the range 9 kHz to 300 GHz. However, for practical measurement purpose only,
the frequency range of spurious domain emissions may be restricted. As guidance for practical purposes, the
measurement parameters reported in table 1 and its related notes 1 and 2 of CEPT/ERC Recommendation 74-01 [1]
reprinted, for reader convenience in table A.1.
ETSI
16 ETSI EN 301 390 V2.1.1 (2021-11)
Table A.1: Abstract of CEPT/ERC Recommendation 74-01 [1]
Table 1: Frequency range for measurement of unwanted emissions
Fundamental frequency Frequency range for measurements
range
Lower frequency Upper frequency (see note)
9 kHz to 100 MHz 9 kHz 1 GHz
th
100 MHz to 300 MHz 9 kHz
10 harmonic
300 MHz to 600 MHz 30 MHz 3 GHz
th
600 MHz to 5,2 GHz 30 MHz
5 harmonic
5,2 GHz to 13 GHz 30 MHz 26 GHz
nd
13 GHz to 150 GHz 30 MHz
2 harmonic
150 GHz to 300 GHz 30 MHz 300 GHz
NOTE: The test should include the entire harmonic band and not be truncated at the
precise upper frequency limit stated.

NOTE 1: The parameters in table 1 reflect the increasing difficulty in undertaking real tests at higher frequencies,
taking into account such factors as availability and usability of suitable measurement equipment. In such
cases, when systems with integral antenna would require radiated measurement, their antenna gain should
be taken into account either with separate test or with appropriate theoretical calculation. In some
circumstances, it may be necessary to extend the range of test frequencies in order to facilitate better
protection of other services, including passive services. In any case, systems having an integral antenna
incorporating a waveguide section, or with an antenna connection in such form, and of length equal to at
least twice the cut-off wavelength, should not require spurious domain emissions measurement below
0,7 times the waveguide cut-off frequency.
NOTE 2: Although measurements are outside the scope of this Recommendation, it is recognized that testing at
higher frequency may not have a defined measurement uncertainty due to absence of primary references.
In addition furt
...