SIST EN 301 390 V1.1.1:2003
(Main)Fixed Radio Systems; Point-to-point and Point-to-Multipoint Systems; Spurious emissions and receiver immunity at equipment/antenna port of Digital Fixed Radio Systems
Fixed Radio Systems; Point-to-point and Point-to-Multipoint Systems; Spurious emissions and receiver immunity at equipment/antenna port of Digital Fixed Radio Systems
To identify the general requirements for Fixed radio Systems inter-working in various frequency bands of CEPT interest.
Fiksni radijski sistemi – Sistemi točka-točka in točka-več točk – Neželena oddajanja in odpornost sprejemnika pri vhodu v opremo oziroma pri antenskem vhodu digitalnih fiksnih radijskih sistemov
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 301 390 V1.1.1:2003
01-december-2003
)LNVQLUDGLMVNLVLVWHPL±6LVWHPLWRþNDWRþNDLQWRþNDYHþWRþN±1HåHOHQD
RGGDMDQMDLQRGSRUQRVWVSUHMHPQLNDSULYKRGXYRSUHPRR]LURPDSULDQWHQVNHP
YKRGXGLJLWDOQLKILNVQLKUDGLMVNLKVLVWHPRY
Fixed Radio Systems; Point-to-point and Point-to-Multipoint Systems; Spurious
emissions and receiver immunity at equipment/antenna port of Digital Fixed Radio
Systems
Ta slovenski standard je istoveten z: EN 301 390 Version 1.1.1
ICS:
33.060.30 Radiorelejni in fiksni satelitski Radio relay and fixed satellite
komunikacijski sistemi communications systems
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
SIST EN 301 390 V1.1.1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 301 390 V1.1.1:2003
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SIST EN 301 390 V1.1.1:2003
ETSI EN 301 390 V1.1.1 (2000-12)
European Standard (Telecommunications series)
Fixed Radio Systems;
Point-to-point and Point-to-Multipoint Systems;
Spurious emissions and receiver immunity at
equipment/antenna port of Digital Fixed Radio Systems
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SIST EN 301 390 V1.1.1:2003
2 ETSI EN 301 390 V1.1.1 (2000-12)
Reference
DEN/TM-04040
Keywords
antenna, DRRS, EMC, emission, immunity
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Copyright Notification
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The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2000.
All rights reserved.
ETSI
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SIST EN 301 390 V1.1.1:2003
3 ETSI EN 301 390 V1.1.1 (2000-12)
Contents
Intellectual Property Rights .4
Foreword.4
1 Scope.5
2 References.6
3 Definitions, symbols and abbreviations .7
3.1 Definitions . 7
3.2 Symbols . 7
3.3 Abbreviations. 7
4 Transmitter spurious emissions at antenna port .8
4.1 Limits . 8
4.1.1 Point-to-point equipments . 9
4.1.2 Point-to-multipoint equipments with fundamental emission below 21,2 GHz . 9
4.1.3 Point-to-multipoint equipments with fundamental emission above 21,2 GHz. 9
5 Receiver spurious emissions at the antenna port .10
6 Spurious emissions test method.10
7 Receivers immunity at antenna port .11
7.1 Limits . 11
7.2 Receiver immunity test method. 11
Annex A (informative): Application of CEPT/ERC Recommendation 74-01 .12
A.1 Frequency range of applicability .12
A.2 Level limits.13
A.3 Reference bandwidths.13
A.4 Detailed application of the reference bandwidths reported in table A.3.15
A.4.1 P-P and P-MP systems with fundamental emissions from 30 MHz to 1 GHz. 15
A.4.2 P-P and P-MP systems with fundamental emissions from 1 GHz to 21,2 GHz . 15
A.4.3 P-P systems with fundamental emissions above 21,2 GHz. 16
A.4.4 P-MP systems with fundamental emissions above 21,2 GHz . 16
Annex B (informative): Measurement background.17
B.1 Spectrum analyser capability.17
B.2 Application examples .17
History .23
ETSI
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SIST EN 301 390 V1.1.1:2003
4 ETSI EN 301 390 V1.1.1 (2000-12)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is 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 (http://www.etsi.org/ipr).
Pursuant to the ETSI IPR Policy, no investigation, 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.
Foreword
This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Transmission
and Multiplexing (TM).
National transposition dates
Date of adoption of this EN: 24 November 2000
Date of latest announcement of this EN (doa): 28 February 2001
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 August 2001
Date of withdrawal of any conflicting National Standard (dow): 31 August 2001
ETSI
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SIST EN 301 390 V1.1.1:2003
5 ETSI EN 301 390 V1.1.1 (2000-12)
1 Scope
The present document deals with spurious emissions at antenna port of Digital Fixed Radio Systems as defined by
Radio Regulation Article 1 [15], ITU-R Recommendation SM.329-7 [1], ITU-R Recommendation F.1191-1 [2] and
CEPT/ERC Recommendation 74-01 [3].
Moreover it covers immunity characteristics at receiver's antenna port.
Scope of the present document is to define specific limits at antenna port of spurious emissions and receiver immunity
for suitable inter-working of Digital Fixed Radio Systems (i.e. Point-to-Point and Point-to-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.
Spurious emissions levels and immunity performance at antenna port are also required to fulfil the
EEC directive 89/336 [14] on EMC.
The present document complements CEPT/ERC Recommendation 74-01 [3] which gives Spurious Emissions limits
with particular regards to "inter Services" operations, while WG TM4 assumed that in some case more protection is
required for compatibility among fixed radio systems deployed in the same geographical area.
Additional considerations and background for producing the present document are:
- Radio Regulations definition of spurious emissions (RR Article 1 N°139 [15]) is aged and give concept and
applicability which do not clearly fit to digital systems;
- ITU-R Recommendation SM.329-7 [1] includes emissions with digital modulation but allows options for the
definition of the frequency boundary between out of band and spurious emissions and two different Category of
level limits applicable to the Fixed Service;
- ITU-R Recommendation F.1191-1 [2] and CEPT/ERC Recommendation 74-01 [3] define the application of
Radio Regulations concepts of Out of band, Unwanted and Spurious emissions to fixed Digital Radio Systems,
clarify the applicability for the boundary between Out of band and Spurious emissions but maintain the same
possible limit options provided by ITU-R Recommendation SM.329-7 [1];
- STC-RES09 has produced many ETSs covering EMC of radio equipment for mobile applications, which include
emissions (or radiation) and immunity at antenna port; STC-RES09 also produced EN 301 489-1 [10] and
EN 301 489-4 [11] covering EMC for fixed Radio links, which exclude, by mutual agreement with WG-TM4,
spurious emissions and immunity at antenna port, which have to be defined by the product standards in order to
cover all the technical parameters for conformance to the EMC Directive 89/336;
- considering the large number of TM4 deliverables it is convenient to maintain a single 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 of spurious emissions shall 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
(informative annex B gives also information in this field);
- it is advisable that Fixed Radio Systems 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 Fixed Radio Systems receivers immunity at antenna port may be
considered the application of a CW interference.
ETSI
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SIST EN 301 390 V1.1.1:2003
6 ETSI EN 301 390 V1.1.1 (2000-12)
The present document will cover the limits of spurious emissions for already published ETSI deliverables for Fixed
Radio Systems, for the time needed to produce suitable revision, in the following cases:
• the ETSI deliverable does not cover the external spurious emissions and/or receiver immunity items;
• the ETSI deliverable contains less demanding limits;
• the ETSI deliverable contains preliminary limits and/or undefined reference bandwidth.
Some ETSI deliverables for Fixed Radio Systems, sometimes, provide limits for both "external" and "internal" spurious
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 fix the suitable limits, in informative annex B, spurious emissions are analysed from the point of view of a
suitable test method for conformance testing.
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
• References are either specific (identified by date of publication, edition number, version number, etc.) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies.
• A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the same
number.
[1] ITU-R Recommendation SM.329-7 (1997): "Spurious Emissions".
[2] ITU-R Recommendation F.1191-1 (1997): "Bandwidths and unwanted emissions of digital
radio-relay systems".
[3] CEPT/ERC Recommendation 74-01 (1998): "Spurious emissions".
[4] ETSI EN 301 126-1: "Fixed Radio Systems; Conformance testing; Part 1: Point-to-Point
equipment - Definitions, general requirements and test procedures".
[5] ETSI EN 301 126-2-1: "Fixed Radio Systems; Conformance testing; Part 2-1: Point-to-Multipoint
equipment; Definitions and general requirements".
[6] ETSI EN 301 126-2-2: "Fixed Radio Systems; Conformance testing; Part 2-2: Point-to-Multipoint
equipment; Test procedures for FDMA systems".
[7] ETSI EN 301 126-2-3: "Fixed Radio Systems; Conformance testing; Part 2-3: Point-to-Multipoint
equipment; Test procedures for TDMA systems".
[8] ETSI EN 301 126-2-4: "Fixed Radio Systems; Conformance testing; Part 2-4: Point-to-Multipoint
equipment; Test procedures for FH-CDMA systems".
[9] ETSI EN 301 126-2-5: "Fixed Radio Systems; Conformance testing; Part 2-5: Point-to-Multipoint
equipment; Test procedures for DS-CDMA systems".
[10] ETSI EN 301 489-1: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 1:
Common technical requirements".
[11] ETSI EN 301 489-4: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 4: Specific
conditions for fixed radio links and ancillary equipment and services".
ETSI
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SIST EN 301 390 V1.1.1:2003
7 ETSI EN 301 390 V1.1.1 (2000-12)
[12] ETSI TR 101 036-1: "Fixed Radio Systems; Point-to-point equipment; Generic wordings for
standards on digital radio systems characteristics; Part 1: General aspects and point-to-point
equipment parameters".
[13] ITU-R Recommendation F.746-4 (1999): "Radio-frequency channel arrangements for radio-relay
systems".
[14] Council Directive 89/336/EEC of 3 May 1989 on the approximation of the laws of the Member
States relating to electromagnetic compatibility.
[15] ITU-R: "Radio Regulations Article 1".
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply.
evaluation bandwidth: bandwidth where the spurious emission limits are measured (e.g. the spectrum analyser
resolution bandwidth) for further normalization/integration to the Reference bandwidth.
out of band emissions: ITU-R Recommendation F.1191-1 [2] defines that any unwanted emission which falls at
frequencies separated from the centre frequency of the emission by less than 250 % of the relevant channel separation,
where the system is intended to be used, will generally be considered out of band emission. See also
RR Article 1 [15] N°138 and ITU-R Recommendations SM.329-7 [1] and CEPT/ERC Recommendation 74-01 [3].
receiver spurious emissions: spurious sent backwards to the antenna port by a receiver; sometimes they are also
referenced as "spurious radiations".
reference bandwidth: bandwidth where the spurious emission limits are defined,
see ITU-R Recommendation SM.329-7 [1].
spurious emissions: ITU-R Recommendation F.1191-1 [2] defines that any unwanted emission which falls at
frequencies separated from the centre frequency of the emission by 250 % or more of the relevant channel separation,
where the system is intended to be used, will generally be considered spurious emission. See also
RR Article 1 [15] N°139 and ITU-R Recommendations SM.329-7 [1] and CEPT/ERC Recommendation 74-01 [3].
unwanted emissions: they are composed by Out of band and spurious emissions. See also
RR Article 1 [15] N°140 and ITU-R Recommendations SM.329-7 [1] and F.1191-1 [2].
3.2 Symbols
For the purposes of the present document, the following symbols apply:
dBc deciBels to carrier mean power
dBm deciBels to milliwatt
GHz GigaHertz
kHz kilohertz
MHz Megahertz
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ATPC Automatic Transmission Power Control
BER Bit Error Rate
BWe Evaluation BandWidth for spectral measurement (i.e. Spectrum analyser Resolution bandwidth)
BWr Reference BandWidth
CS Channel Separation
ETSI
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SIST EN 301 390 V1.1.1:2003
8 ETSI EN 301 390 V1.1.1 (2000-12)
CW Continuous Wave
DRRS Digital Radio-Relay Systems
DUT Device Under Test
Fc cut-off Frequency
i.m.p. Intermodulation products
MS Master Station of a P-MP system
P-MP Point-to-MultiPoint system
P-P Point-to-Point system
QAM Quadrature Amplitude Modulation
RF Radio Frequency
RR Radio Regulations
RS Repeater Station (of a P-MP system)
RSL Receiver Signal Level
Rx Receiver
TS Terminal Station (Remote out-station with subscriber interface) of a P-MP system
Tx Transmitter
VSWR Voltage Standing Wave Ratio
4 Transmitter spurious emissions at antenna port
According to ITU-R Recommendation SM.329-7 [1] and the application to fixed service provided by
ITU-R Recommendation F.1191-1 [2], the external spurious emissions are defined as emissions at frequencies
which are ±250 % of the relevant channel separation outside the nominal carrier frequency.
According ITU-R Recommendation F.1191-1 [2], 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
ITU-R Recommendation F.746-4 [13].
The emission within ±250 % of the relevant channel separation includes only fundamental and out of band emissions
which are outside the scope of the present document.
4.1 Limits
Unless more severe requirement were reported into a specific product ETSI deliverable, the spurious emissions at
antenna port of Fixed Radio Systems of both transmitter and receiver shall be limited within the average power limits
reported below.
For "noise-like" emissions, the limits are intended not to be exceeded in any elementary measuring 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
BA
C Z
D
Branching
Feeder RF Rx Filter Receiver
Network
Figure 1: RF block diagram
ETSI
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SIST EN 301 390 V1.1.1:2003
9 ETSI EN 301 390 V1.1.1 (2000-12)
4.1.1 Point-to-point equipments
The CEPT/ERC Recommendation 74-01 [3] shall apply.
For readers convenience, informative annex A gives the details for its application to practical systems.
4.1.2 Point-to-multipoint equipments with fundamental emission
below 21,2 GHz
The CEPT/ERC Recommendation 74-01 [3] shall apply.
For readers convenience, informative annex A gives the details for its application to practical systems.
4.1.3 Point-to-multipoint equipments with fundamental emission
above 21,2 GHz
The CEPT/ERC Recommendation 74-01 [3] shall apply for spurious emissions in the frequency range 9 kHz to
21,2 GHz and above 43,5 GHz.
For spurious emissions falling in the range 21,2 GHz to 43,5 GHz the tighter limits shown in figures 2 and 3 shall apply
to both Central and Terminal Stations.
In this frequency range, where the -40 dBm limit shown in figures 2 and 3 apply, allowance is given for no more than
10 discrete (CW) spurious emissions which are permitted to exceed the limit up to -30 dBm.
In the same figures, for comparison, the less stringent limits from CEPT/ERC Recommendation 74-01 [3] are also
shown.
Channel Centre Frequency
Out-of-band emission limit (TM4 Mask)
CEPT/ERC
CEPT/ERC
Recommendation 74-01 Recommendation 74-01
Limits apply
Limits apply
-30 dBm/100 kHz
-30 dBm/100 kHz
-30 dBm/1 MHz -30 dBm/1 MHz
-40 dBm/1 MHz -40 dBm/1 MHz
CS
+-250% CS
21,2 GHz 43,5 GHz
+- 56 MHz
+- 70 MHz (CEPT/ERC only)
+- 112 MHz
CEPT/ERC Recommendation 74-01 limits
Additional requirement of this EN for all stations
Figure 2: P-MP equipments for channel separation 1 < CS ≤≤≤≤ 10 MHz
ETSI
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SIST EN 301 390 V1.1.1:2003
10 ETSI EN 301 390 V1.1.1 (2000-12)
Channel Centre Frequency
Out-of-band emission limit (Spectrum Mask)
CEPT/ERC
CEPT/ERC
Recommendation 74-01
Recommendation 74-01
Limits apply Limits apply
-30 dBm/1 MHz
-30 dBm/1 MHz
-40 dBm/1 MHz
-40 dBm/1 MHz
CS
+-250% CS
43,5 GHz
21,2 GHz
+- 112 MHz or 450%CS (whichever is greater)
CEPT/ERC Recommendation 74-01 limits
Additional requirement of this EN for all stations
Figure 3: P-MP equipments for channel separation CS > 10 MHz
5 Receiver spurious emissions at the antenna port
Receiver spurious emissions are defined in the same frequency range of transmitters spurious 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 [3] shall apply.
6 Spurious 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 in
EN 301 126-1 [4] and EN 301 126-2-1 [5], EN 301 126-2-2 [6], EN 301 126-2-3 [7], EN 301 126-2-4 [8] and
EN 301 126-2-5 [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
ITU-R Recommendation F.1191-1 [2] and CEPT/ERC Recommendation 74-01 [3].
NOTE: With ATPC disabled and set to the higher emission power.
ETSI
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SIST EN 301 390 V1.1.1:2003
11 ETSI EN 301 390 V1.1.1 (2000-12)
7 Receivers immunity at antenna port
7.1 Limits
A suitable and easy to perform criterion is considered the application of a CW interference.
CW spurious response rejection ratio of a receiver is a measure of its ability to discriminate between the wanted signal
at the nominal channel frequency of the receiver and an unwanted signal at any other frequency at which a response is
obtained.
Unless more severe requirement were reported into a specific product ETSI deliverable, for a receiver operating at a
-6
RSL corresponding to the nominal 10 BER threshold given by the relevant ETSI deliverable or in their vacancy by the
Manufacturer declaration, the introduction of a CW interferer at a level of + 30 dB, with respect to the "wanted" signal
-5
shall not result in a BER greater than 10 .
-6
NOTE 1: This requirement is considered equivalent to a degradation of 1 dB of the 10 BER threshold.
The requirement above shall be fulfilled at any frequency in the range given in table 1 (see note 2), excluding
frequencies either side of the wanted frequency by:
- up to twice the foreseen co-polar channel spacing (for P-P systems);
- up to five times the foreseen co-polar channel spacing (for P-MP systems).
NOTE 2: When waveguide is used between reference points A and C of figure 1, which length is higher than twice
the free space wavelength of cut-off frequency (Fc), the lower limit of measurement will be increased to
0,7 Fc and, when the length is higher than four times the same wavelength, to 0,9 Fc.
Table 1
Fundamental receiver CW Spurious Response frequency range
frequency range
Lower frequency Upper frequency
(the test should include the entire harmonic band and not
be truncated at the precise upper frequency limit stated)
9 kHz to 100 MHz 9 kHz 1 GHz
100 MHz to 300 MHz 9 kHz 10th harmonic
300 MHz to 600 MHz 30 MHz 3 GHz
300 MHz to 5,2 GHz 30 MHz 5th harmonic
5,2 GHz to 13 GHz 30 MHz 26 GHz
13 GHz to 150 GHz 30 MHz 2nd harmonic
150 GHz to 300 GHz 30 MHz 300 GHz
The above kind of immunity do not exclude other more demanding requirement of a specific product (pr)ETSI
deliverable, if any.
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 in
EN 301 126-1 [4] and EN 301 126-2-1 [5], EN 301 126-2-2 [6], EN 301 126-2-3 [7], EN 301 126-2-4 [8] and
EN 301 126-2-5 [9].
ETSI
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SIST EN 301 390 V1.1.1:2003
12 ETSI EN 301 390 V1.1.1 (2000-12)
Annex A (informative):
Application of CEPT/ERC Recommendation 74-01
The limits of the spurious emissions required by the present document are reported in
CEPT/ERC Recommendation 74-01 [3]; however, for reader convenience, relevant limits of this recommendation
is reported below in relation to those required by the present document.
A.1 Frequency range of applicability
According to ITU-R Recommendation SM.329-7 [1] and the application to fixed service provided by
ITU-R Recommendation F.1191-1 [2], CEPT/ERC Recommendation 74-01 [3] defines spurious emissions as any
emission at frequencies which are outside the nominal carrier frequency by more than ±250 % of the relevant channel
separation.
The CEPT/ERC Recommendation 74-01 [3] requires that the limits on spurious emissions for radio equipments 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 emissions may be restricted. As guidance for practical purposes, the measurement
parameters reported in table A.1 are normally recommended by CEPT/ERC Recommendation 74-01 [3].
Table A.1
Fundamental frequency Spurious frequency range
range
Lower frequency Upper frequency
(The test should include the entire harmonic band and
not be truncated at the precise upper frequency limit
stated)
9 kHz to 100 MHz 9 kHz 1 GHz
100 MHz to 300 MHz 9 kHz 10th harmonic
300 MHz to 600 MHz 30 MHz 3 GHz
300 MHz to 5,2 GHz 30 MHz 5th harmonic
5,2 GHz to 13 GHz 30 MHz 26 GHz
13 GHz to 150 GHz 30 MHz 2nd harmonic
150 GHz to 300 GHz 30 MHz 300 GHz
These parameters reflect the increasing difficulty in undertaking practicable tests, especially at frequencies approaching
or beyond 110 GHz, taking into account such factors as availability and usability of suitable measurement equipment. In
some circumstances, it may be necessary to extend the range of test frequencies in order to better facilitate protection of
other services such as Radioastronomy. 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 emissions measurement below 0,7 times the waveguide cut-off frequency.
For "noise-like" emissions, the limits are intended not to be exceeded in any elementary measuring bandwidth.
ETSI
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SIST EN 301 390 V1.1.1:2003
13 ETSI EN 301 390 V1.1.1 (2000-12)
A.2 Level limits
The CEPT/ERC Recommendation 74-01 [3] requires the limits reported in table A.2.
Table A.2
LIMIT FOR FIXED SERVICE RADIO RELAY SYSTEMS
Type of equipment Limits
mean power or, when applicable, average power during
bursts duration in the reference bandwidth
Fixed Service (all station except those below) -50 dBm 9 kHz < f<21,2GHz(note1)
-30dBm 21,2GHz< f (see clause A.1) (note 1)
Fixed Service - Terminal station (out station with -40 dBm 9 kHz < f<21,2GHz(note1)
subscriber equipment interfaces) (note 2) -30d
...
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