SIST EN 303 135 V2.2.1:2021

ETSI EN 303 135 V2.2.1 (2020-11)






HARMONISED EUROPEAN STANDARD
Coastal Surveillance, Vessel Traffic Services and
Harbour Radars (CS/VTS/HR);
Harmonised Standard for access to radio spectrum

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2 ETSI EN 303 135 V2.2.1 (2020-11)



Reference
REN/ERM-TGMAR-535
Keywords
harmonised standard, maritime, radar, regulation

ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: +33 4 92 94 42 00  Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2020.
All rights reserved.

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.
ETSI

---------------------- Page: 2 ----------------------
3 ETSI EN 303 135 V2.2.1 (2020-11)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 6
3 Definition of terms, symbols and abbreviations . 7
3.1 Terms . 7
3.2 Symbols . 8
3.3 Abbreviations . 8
4 Technical requirements specifications . 9
4.1 Environmental profile . 9
4.2 Conformance requirements . 9
4.2.1 Transmitter requirements . 9
4.2.1.1 Frequency Accuracy. 9
4.2.1.1.1 Definition. 9
4.2.1.1.2 Limits . 9
4.2.1.1.3 Conformance . 9
4.2.1.2 Transmitter power . 10
4.2.1.2.1 Definition. 10
4.2.1.2.2 Limits . 10
4.2.1.2.3 Conformance . 10
4.2.1.3 Measured Bandwidth . 10
4.2.1.3.1 Definition. 10
4.2.1.3.2 Limits . 10
4.2.1.3.3 Conformance . 10
4.2.1.4 Out-of-band emissions . 10
4.2.1.4.1 Definition. 10
4.2.1.4.2 Limits . 11
4.2.1.4.3 Conformance . 12
4.2.1.5 Spurious emissions . 12
4.2.1.5.1 Definition. 12
4.2.1.5.2 Limits . 13
4.2.1.5.3 Conformance . 13
4.2.1.6 Stand-by Mode Emissions . 13
4.2.1.6.1 Definition. 13
4.2.1.6.2 Limits . 14
4.2.1.6.3 Conformance . 14
4.2.2 Receiver requirements . 14
4.2.2.1 System Noise Figure . 14
4.2.2.1.1 Definition. 14
4.2.2.1.2 Limits . 14
4.2.2.1.3 Conformance . 14
4.2.2.2 Receiver Selectivity . 14
4.2.2.2.1 Definition. 14
4.2.2.2.2 Limit . 14
4.2.2.2.3 Conformance . 15
4.2.2.3 Receiver Compression Level . 15
4.2.2.3.1 Definition. 15
4.2.2.3.2 Limit . 15
4.2.2.3.3 Conformance . 15
5 Testing for compliance with technical requirements . 16
5.0 General requirements . 16
ETSI

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4 ETSI EN 303 135 V2.2.1 (2020-11)
5.1 Environmental conditions for testing . 16
5.1.1 Test Conditions . 16
5.1.2 Normal temperature and humidity . 16
5.1.3 Normal test power supply . 16
5.2 Radio test suites . 16
5.2.1 Transmitter test specification . 16
5.2.1.1 Frequency Accuracy. 16
5.2.1.2 Transmitter power . 16
5.2.1.3 Measured Bandwidth . 17
5.2.1.4 Out-of-Band-emissions . 17
5.2.1.5 Spurious emissions . 19
5.2.1.6 Stand-by Mode Emissions . 20
5.2.2 Receiver test specification . 20
5.2.2.1 System Noise Figure . 20
5.2.2.1.0 General . 20
5.2.2.2 Receiver Selectivity . 20
5.2.2.2.0 General . 20
5.2.2.2.1 Receiver Out-of-Band selectivity . 21
5.2.2.3 Receiver Compression Level . 22
Annex A (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 23
Annex B (normative): Transmission power, Frequency Accuracy and Unwanted Emissions
of radar systems with indirect methods . 24
Annex C (normative): Calculation of the -40 dB Bandwidth . 25
Annex D (informative): Maximum Measurement Uncertainty . 27
Annex E (informative): WR90/WG16/R100 waveguide characteristics . 28
Annex F (normative): Noise figure measurement set-up . 30
Annex G (normative): Compression level and selectivity measurement set-up. 31
Annex H (informative): Checklist . 32
Annex I (informative): Bibliography . 35
Annex J (informative): Change history . 36
History . 37


ETSI

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5 ETSI EN 303 135 V2.2.1 (2020-11)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables 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 (https://ipr.etsi.org/).
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.
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.
Foreword
This Harmonised European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic
compatibility and Radio spectrum Matters (ERM).
The present document has been prepared under the Commission's standardisation request C(2015) 5376 final [i.6] to
provide one voluntary means of conforming to the essential requirements of Directive 2014/53/EU on the harmonisation
of the laws of the Member States relating to the making available on the market of radio equipment and repealing
Directive 1999/5/EC [i.1].
Once the present document is cited in the Official Journal of the European Union under that Directive, compliance with
the normative clauses of the present document given in table A.1 confers, within the limits of the scope of the present
document, a presumption of conformity with the corresponding essential requirements of that Directive and associated
EFTA regulations.

National transposition dates
Date of adoption of this EN: 18 November 2020
Date of latest announcement of this EN (doa): 28 February 2021
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 August 2021
Date of withdrawal of any conflicting National Standard (dow): 31 August 2022

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

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6 ETSI EN 303 135 V2.2.1 (2020-11)
1 Scope
The present document specifies technical characteristics and methods of measurements for X-band radar sensors
intended for Coastal Surveillance (CS), Vessel Traffic Services (VTS) and harbour surveillance with the following
characteristics:
• Operating in the following frequency range:
- 8 500 MHz to 10 000 MHz utilizing modulated or unmodulated pulses.
• Transmitter Peak Envelope Power up to 100 kW.
• The transmitter output (from power amplifier) towards the antenna uses a hollow metallic rectangular
waveguide of type WR90/WG16/R100 according to IEC 60153-2 [i.3] with a minimum length of 92 cm
(20 times the wavelength of the waveguide cut-off frequency).
• The antenna is rotating, waveguide-based and passive.
• At the transceiver output an RF-circulator is used.
NOTE: The relationship between the present document and essential requirements of article 3.2 of Directive
2014/53/EU [i.1] is given in annex A.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or non-
specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference/.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] ECC Recommendation (02)05 (2012): "Unwanted emissions".
[2] ERC Recommendation 74-01 (2019): "Unwanted emissions in the spurious domain".
[3] Recommendation ITU-R M.1177-4 (04/2011): "Techniques for measurement of unwanted
emissions of radar 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 specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
ETSI

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7 ETSI EN 303 135 V2.2.1 (2020-11)
[i.1] Directive 2014/53/EU of the European Parliament and of the Council of 16 April 2014 on the
harmonisation of the laws of the Member States relating to the making available on the market of
radio equipment and repealing Directive 1999/5/EC.
[i.2] Merrill I. Skolnik: "Radar Handbook", 2nd Edition, McGraw Hill publications.
[i.3] IEC 60153-2:2016: "Hollow metallic waveguides. Part 2: Relevant specifications for ordinary
rectangular waveguides".
[i.4] ETSI EG 203 336: "Guide for the selection of technical parameters for the production of
Harmonised Standards covering article 3.1(b) and article 3.2 of Directive 2014/53/EU".
[i.5] Recommendation ITU-R SM.1541-6 (08/2015): "Unwanted emissions in the out-of-band domain".
[i.6] Commission Implementing Decision C(2015) 5376 final of 4.8.2015 on a standardisation request
to the European Committee for Electrotechnical Standardisation and to the European
Telecommunications Standards Institute as regards radio equipment in support of Directive
2014/53/EU of the European Parliament and of the Council.
[i.7] ITU Radio Regulations (2016).
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
active state: state producing the authorized emission
allocated band: frequency span that regionally or nationally is allocated to one or more radio services on a primary or
secondary basis
NOTE: A table of national frequency allocations are normally available from the radio authority for each national
state. Also a generic frequency allocation table is available in the ITU Radio Regulations [i.7].
declared band: band or bands within which the product under test is declared to operate in the applicable operating
modes
NOTE: The declared band for a given region or country is always contained within the allocated band.
idle/standby state: state where the transmitter is available for traffic, but is not in the active state
Minimum Detectable Signal (MDS): measure of the lowest detectable signal amplitude for a given signal type for a
given radar
NOTE: For solid state radars a processing gain can be associated with a received signal. This processing gain has
the effect of lowering the MDS level in comparison to a MDS which is based only on noise temperature.
necessary bandwidth: 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 for a given class of emission
NOTE: This definition is taken from ITU Radio Regulations [i.7].
occupied bandwidth: 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
NOTE 1: This definition is taken from ITU Radio Regulations [i.7].
NOTE 2: Unless otherwise specified in an Recommendation ITU-R for the appropriate class of emission, the value
of β/2 should be taken as 0,5 %.
ETSI

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8 ETSI EN 303 135 V2.2.1 (2020-11)
operating mode: predefined configuration for a given service accessible to the operator of the radar system
NOTE 1: Several operating modes may be available.
NOTE 2: Changing operating mode might affect the radio characteristics of the radar system.
Peak Envelope Power (PEP): average power supplied to the antenna transmission line by a transmitter during one
radio frequency cycle at the crest of the modulation envelope taken under normal operating conditions
NOTE: This definition is taken from ITU Radio Regulations [i.7].
product configuration: hardware variant of the same typology of system under test (e.g. different power outputs,
magnetrons)
pulse duration: time between the 50 % amplitude (voltage) points
pulse rise time: time taken for the leading edge of the pulse to increase from 10 % to 90 % of the maximum amplitude
(voltage)
receiver selectivity: ability of a receiver to detect and decode a desired signal in the presence of an unwanted
interfering signal outside the B bandwidth
-40
simple pulse radar: radar using pulsed emissions but not using frequency, phase or power modulation
3.2 Symbols
For the purposes of the present document, the following symbols apply:
B -40 dB bandwidth
-40
B Chirp bandwidth
C
B Necessary bandwidth
N
B 3 dB resolution bandwidth of transceiver
res
dB/dec dB per decade
dBpp dB with respect to peak power
D Detectability Factor (function of PD & Pfa)
no spur
k Boltzmann's constant
NF Noise Factor of the system
sys
P Probability of detection
D
P Probability of false alarm
FA
P Pulse power of transmission
t
t Time
t Pulse duration
p
t Pulse rise time
r
T Temperature in Kelvin
0
T Pulse length (of individual chirp) in seconds
C
λ Wavelength
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AC Alternating Current
CS Coastal Surveillance
CW Continous Wave
dBm Power ratio expressed in decibels (dB) with reference to one milliwatt
dBW Power ratio expressed in decibels (dB) with reference to one Watt
EFTA European Free Trade Association
EM ElectroMagnetic
EN European Norm
ETSI

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9 ETSI EN 303 135 V2.2.1 (2020-11)
FM Frequency Modulation
HR HaRbour
kW kiloWatt
LNA Low Noise Amplifier
LO Local Oscillator
MDS Minimum Detectable Signal
NA Not Applicable
OoB Out-of-Band
PEP Peak Envelope Power
PPI Plan Position Indicator (Display showing the radar video etc)
ppm part(s) per million
RF Radio Frequency
VTS Vessel Traffic Services
WG WaveGuide
4 Technical requirements specifications
4.1 Environmental profile
The technical requirements of the present document apply under the environmental profile for operation of the
equipment, which shall be in accordance with its intended use, but as a minimum, shall be that specified in the test
conditions contained in the present document. The equipment shall comply with all the technical requirements of the
present document at all times when operating within the boundary limits of the operational environmental profile
defined by its intended use.
4.2 Conformance requirements
4.2.1 Transmitter requirements
4.2.1.1 Frequency Accuracy
4.2.1.1.1 Definition
The transmitter of a pulsed radar produces microwave pulses, which cause a broad frequency spectrum, depending on
the pulse duration.
The frequency accuracy is the maximum permissible departure by the centre frequency of the frequency band occupied
by an emission from the assigned frequency or, by the characteristic frequency of an emission from the reference
frequency.
4.2.1.1.2 Limits
The frequency accuracy at the defined operating frequency for radars applying unmodulated pulses shall not exceed
1 250 ppm.
NOTE: This value is defined in appendix 2 of the ITU Radio Regulations [i.7].
4.2.1.1.3 Conformance
The conformance tests are specified in clause 5.2.1.1.
The results obtained shall not exceed the limits specified in clause 4.2.1.1.2.
ETSI

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10 ETSI EN 303 135 V2.2.1 (2020-11)
4.2.1.2 Transmitter power
4.2.1.2.1 Definition
In the present document the transmitter power of a pulse radar is the peak value of the transmitter pulse power during
the transmission pulse (PEP) measured at the antenna flange (output port of the transmitter).
4.2.1.2.2 Limits
The transmitter power shall not exceed 100 kW (50 dBW).
4.2.1.2.3 Conformance
The conformance tests are specified in clause 5.2.1.2.
The results obtained shall not exceed the limits specified in clause 4.2.1.2.2.
4.2.1.3 Measured Bandwidth
4.2.1.3.1 Definition
The measured -40 dB bandwidth (B ) is the measured bandwidth of the emission 40 dB below the measured PEP.
-40
The measured -20 dB bandwidth (B ) is the measured bandwidth of the emission 20 dB below the measured PEP.
-20
4.2.1.3.2 Limits
For radar types using a modulated pulse the measured -40 dB bandwidth of the signal shall be contained completely
within the declared band in all operating modes.
In case of multiple carrier-frequencies, all measured -40 dB e
...

Draft ETSI EN 303 135 V2.1.2 (2020-08)






HARMONISED EUROPEAN STANDARD
Coastal Surveillance, Vessel Traffic Services and
Harbour Radars (CS/VTS/HR);
Harmonised Standard for access to radio spectrum

---------------------- Page: 1 ----------------------
2 Draft ETSI EN 303 135 V2.1.2 (2020-08)



Reference
REN/ERM-TGMAR-535
Keywords
harmonised standard, maritime, radar regulation

ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: +33 4 92 94 42 00  Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2020.
All rights reserved.

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.
ETSI

---------------------- Page: 2 ----------------------
3 Draft ETSI EN 303 135 V2.1.2 (2020-08)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 6
3 Definition of terms, symbols and abbreviations . 7
3.1 Terms . 7
3.2 Symbols . 8
3.3 Abbreviations . 8
4 Technical requirements specifications . 9
4.1 Environmental profile . 9
4.2 Conformance requirements . 9
4.2.1 Transmitter requirements . 9
4.2.1.1 Frequency Accuracy. 9
4.2.1.1.1 Definition. 9
4.2.1.1.2 Limits . 9
4.2.1.1.3 Conformance . 9
4.2.1.2 Transmitter power . 10
4.2.1.2.1 Definition. 10
4.2.1.2.2 Limits . 10
4.2.1.2.3 Conformance . 10
4.2.1.3 Measured Bandwidth . 10
4.2.1.3.1 Definition. 10
4.2.1.3.2 Limits . 10
4.2.1.3.3 Conformance . 10
4.2.1.4 Out-of-band emissions . 10
4.2.1.4.1 Definition. 10
4.2.1.4.2 Limits . 11
4.2.1.4.3 Conformance . 12
4.2.1.5 Spurious emissions . 12
4.2.1.5.1 Definition. 12
4.2.1.5.2 Limits . 13
4.2.1.5.3 Conformance . 13
4.2.1.6 Stand-by Mode Emissions . 13
4.2.1.6.1 Definition. 13
4.2.1.6.2 Limits . 14
4.2.1.6.3 Conformance . 14
4.2.2 Receiver requirements . 14
4.2.2.1 System Noise Figure . 14
4.2.2.1.1 Definition. 14
4.2.2.1.2 Limits . 14
4.2.2.1.3 Conformance . 14
4.2.2.2 Receiver Selectivity . 14
4.2.2.2.1 Definition. 14
4.2.2.2.2 Limit . 14
4.2.2.2.3 Conformance . 15
4.2.2.3 Receiver Compression Level . 15
4.2.2.3.1 Definition. 15
4.2.2.3.2 Limit . 15
4.2.2.3.3 Conformance . 15
5 Testing for compliance with technical requirements . 16
5.0 General requirements . 16
ETSI

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4 Draft ETSI EN 303 135 V2.1.2 (2020-08)
5.1 Environmental conditions for testing . 16
5.1.1 Test Conditions . 16
5.1.2 Normal temperature and humidity . 16
5.1.3 Normal test power supply . 16
5.2 Radio test suites . 16
5.2.1 Transmitter test specification . 16
5.2.1.1 Frequency Accuracy. 16
5.2.1.2 Transmitter power . 16
5.2.1.3 Measured Bandwidth . 17
5.2.1.4 Out-of-Band-emissions . 17
5.2.1.5 Spurious emissions . 19
5.2.1.6 Stand-by Mode Emissions . 20
5.2.2 Receiver test specification . 20
5.2.2.1 System Noise Figure . 20
5.2.2.1.0 General . 20
5.2.2.2 Receiver Selectivity . 20
5.2.2.2.0 General . 20
5.2.2.2.1 Receiver Out-of-Band selectivity . 21
5.2.2.3 Receiver Compression Level . 22
Annex A (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 23
Annex B (normative): Transmission power, Frequency Accuracy and Unwanted Emissions
of radar systems with indirect methods . 24
Annex C (normative): Calculation of the -40 dB Bandwidth . 25
Annex D (informative): Maximum Measurement Uncertainty . 27
Annex E (informative): WR90/WG16/R100 waveguide characteristics . 28
Annex F (normative): Noise figure measurement set-up . 30
Annex G (normative): Compression level and selectivity measurement set-up. 31
Annex H (informative): Checklist . 32
Annex I (informative): Bibliography . 35
Annex J (informative): Change history . 36
History . 37


ETSI

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5 Draft ETSI EN 303 135 V2.1.2 (2020-08)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables 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 (https://ipr.etsi.org/).
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.
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.
Foreword
This draft Harmonised European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic
compatibility and Radio spectrum Matters (ERM), and is now submitted for the combined Public Enquiry and Vote
phase of the ETSI standards EN Approval Procedure.
The present document has been prepared under the Commission's standardisation request C(2015) 5376 final [i.6] to
provide one voluntary means of conforming to the essential requirements of Directive 2014/53/EU on the harmonisation
of the laws of the Member States relating to the making available on the market of radio equipment and repealing
Directive 1999/5/EC [i.1].
Once the present document is cited in the Official Journal of the European Union under that Directive, compliance with
the normative clauses of the present document given in table A.1 confers, within the limits of the scope of the present
document, a presumption of conformity with the corresponding essential requirements of that Directive and associated
EFTA regulations.

Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 18 months after doa

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

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6 Draft ETSI EN 303 135 V2.1.2 (2020-08)
1 Scope
The present document specifies technical characteristics and methods of measurements for X-band radar sensors
intended for Coastal Surveillance (CS), Vessel Traffic Services (VTS) and harbour surveillance with the following
characteristics:
• Operating in the following frequency range:
- 8 500 MHz to 10 000 MHz utilizing modulated or unmodulated pulses.
• Transmitter Peak Envelope Power up to 100 kW.
• The transmitter output (from power amplifier) towards the antenna uses a hollow metallic rectangular
waveguide of type WR90/WG16/R100 according to IEC 60153-2 [i.3] with a minimum length of 92 cm
(20 times the wavelength of the waveguide cut-off frequency).
• The antenna is rotating, waveguide-based and passive.
• At the transceiver output an RF-circulator is used.
NOTE: The relationship between the present document and essential requirements of article 3.2 of Directive
2014/53/EU [i.1] is given in annex A.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or non-
specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference/.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] ECC Recommendation (02)05 (2012): "Unwanted emissions".
[2] ERC Recommendation 74-01 (2019): "Unwanted emissions in the spurious domain".
[3] Recommendation ITU-R M.1177-4 (04/2011): "Techniques for measurement of unwanted
emissions of radar 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 specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
ETSI

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7 Draft ETSI EN 303 135 V2.1.2 (2020-08)
[i.1] Directive 2014/53/EU of the European Parliament and of the Council of 16 April 2014 on the
harmonisation of the laws of the Member States relating to the making available on the market of
radio equipment and repealing Directive 1999/5/EC.
[i.2] Merrill I. Skolnik: "Radar Handbook", 2nd Edition, McGraw Hill publications.
[i.3] IEC 60153-2:2016: "Hollow metallic waveguides. Part 2: Relevant specifications for ordinary
rectangular waveguides".
[i.4] ETSI EG 203 336: "Guide for the selection of technical parameters for the production of
Harmonised Standards covering article 3.1(b) and article 3.2 of Directive 2014/53/EU".
[i.5] Recommendation ITU-R SM.1541-6 (08/2015): "Unwanted emissions in the out-of-band domain".
[i.6] Commission Implementing Decision C(2015) 5376 final of 4.8.2015 on a standardisation request
to the European Committee for Electrotechnical Standardisation and to the European
Telecommunications Standards Institute as regards radio equipment in support of Directive
2014/53/EU of the European Parliament and of the Council.
[i.7] ITU Radio Regulations (2016).
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
active state: state producing the authorized emission
allocated band: frequency span that regionally or nationally is allocated to one or more radio services on a primary or
secondary basis
NOTE: A table of national frequency allocations are normally available from the radio authority for each national
state. Also a generic frequency allocation table is available in the ITU Radio Regulations [i.7].
declared band: band or bands within which the product under test is declared to operate in the applicable operating
modes
NOTE: The declared band for a given region or country is always contained within the allocated band.
idle/standby state: state where the transmitter is available for traffic, but is not in the active state
Minimum Detectable Signal (MDS): measure of the lowest detectable signal amplitude for a given signal type for a
given radar
NOTE: For solid state radars a processing gain can be associated with a received signal. This processing gain has
the effect of lowering the MDS level in comparison to a MDS which is based only on noise temperature.
necessary bandwidth: 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 for a given class of emission
NOTE: This definition is taken from ITU Radio Regulations [i.7].
occupied bandwidth: 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
NOTE 1: This definition is taken from ITU Radio Regulations [i.7].
NOTE 2: Unless otherwise specified in an Recommendation ITU-R for the appropriate class of emission, the value
of β/2 should be taken as 0,5 %.
ETSI

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8 Draft ETSI EN 303 135 V2.1.2 (2020-08)
operating mode: predefined configuration for a given service accessible to the operator of the radar system
NOTE 1: Several operating modes may be available.
NOTE 2: Changing operating mode might affect the radio characteristics of the radar system.
Peak Envelope Power (PEP): average power supplied to the antenna transmission line by a transmitter during one
radio frequency cycle at the crest of the modulation envelope taken under normal operating conditions
NOTE: This definition is taken from ITU Radio Regulations [i.7].
product configuration: hardware variant of the same typology of system under test (e.g. different power outputs,
magnetrons)
pulse duration: time between the 50 % amplitude (voltage) points
pulse rise time: time taken for the leading edge of the pulse to increase from 10 % to 90 % of the maximum amplitude
(voltage)
receiver selectivity: ability of a receiver to detect and decode a desired signal in the presence of an unwanted
interfering signal outside the B bandwidth.
-40
simple pulse radar: radar using pulsed emissions but not using frequency, phase or power modulation
3.2 Symbols
For the purposes of the present document, the following symbols apply:
B -40 dB bandwidth
-40
B Chirp bandwidth
C
B Necessary bandwidth
N
B 3 dB resolution bandwidth of transceiver
res
dB/dec dB per decade
dBpp dB with respect to peak power
D Detectability Factor (function of PD & Pfa)
no spur
k Boltzmann's constant
NF Noise Factor of the system
sys
P Probability of detection
D
P Probability of false alarm
FA
P Pulse power of transmission
t
t Time
t Pulse duration
p
t Pulse rise time
r
T Temperature in Kelvin
0
T Pulse length (of individual chirp) in seconds
C
λ Wavelength
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AC Alternating Current
CS Coastal Surveillance
CW Continous Wave
dBm Power ratio expressed in decibels (dB) with reference to one milliwatt
dBW Power ratio expressed in decibels (dB) with reference to one Watt
EFTA European Free Trade Association
EM ElectroMagnetic
EN European Norm
ETSI

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9 Draft ETSI EN 303 135 V2.1.2 (2020-08)
FM Frequency Modulation
HR HaRbour
kW kiloWatt
LNA Low Noise Amplifier
LO Local Oscillator
MDS Minimum Detectable Signal
NA Not Applicable
OoB Out-of-Band
PEP Peak Envelope Power
PPI Plan Position Indicator (Display showing the radar video etc)
ppm part(s) per million
RF Radio Frequency
VTS Vessel Traffic Services
WG WaveGuide
4 Technical requirements specifications
4.1 Environmental profile
The technical requirements of the present document apply under the environmental profile for operation of the
equipment, which shall be in accordance with its intended use, but as a minimum, shall be that specified in the test
conditions contained in the present document. The equipment shall comply with all the technical requirements of the
present document at all times when operating within the boundary limits of the operational environmental profile
defined by its intended use.
4.2 Conformance requirements
4.2.1 Transmitter requirements
4.2.1.1 Frequency Accuracy
4.2.1.1.1 Definition
The transmitter of a pulsed radar produces microwave pulses, which cause a broad frequency spectrum, depending on
the pulse duration.
The frequency accuracy is the maximum permissible departure by the centre frequency of the frequency band occupied
by an emission from the assigned frequency or, by the characteristic frequency of an emission from the reference
frequency.
4.2.1.1.2 Limits
The frequency accuracy at the defined operating frequency for radars applying unmodulated pulses shall not exceed
1 250 ppm.
NOTE: This value is defined in appendix 2 of the ITU Radio Regulations [i.7].
4.2.1.1.3 Conformance
The conformance tests are specified in clause 5.2.1.1.
The results obtained shall not exceed the limits specified in clause 4.2.1.1.2.
ETSI

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10 Draft ETSI EN 303 135 V2.1.2 (2020-08)
4.2.1.2 Transmitter power
4.2.1.2.1 Definition
In the present document the transmitter power of a pulse radar is the peak value of the transmitter pulse power during
the transmission pulse (PEP) measured at the antenna flange (output port of the transmitter).
4.2.1.2.2 Limits
The transmitter power shall not exceed 100 kW (50 dBW).
4.2.1.2.3 Conformance
The conformance tests are specified in clause 5.2.1.2.
The results obtained shall not exceed the limits specified in clause 4.2.1.2.2.
4.2.1.3 Measured Bandwidth
4.2.1.3.1 Definition
The measured -40 dB bandwidth (B ) is the measured bandwidth of the emission 40 dB below the measured PEP.
-40
The measured -20 dB bandwidth (B ) is the measured bandwidth of the emission 20 dB below the measured PEP.
-20
4.2.1.3.2 Limits
For radar types using a modulated pulse the measured -40 d
...

SLOVENSKI STANDARD
oSIST prEN 303 135 V2.1.2:2020
01-oktober-2020
Obalni nadzor, sistemi za nadzor plovbe in pristaniški radarji (CS/VTS/HR) -
Harmonizirani standard za dostop do radijskega spektra
Coastal Surveillance, Vessel Traffic Services and Harbour Radars (CS/VTS/HR) -
Harmonised Standard for access to radio spectrum
Ta slovenski standard je istoveten z: ETSI EN 303 135 V2.1.2 (2020-08)
ICS:
33.060.99 Druga oprema za radijske Other equipment for
komunikacije radiocommunications
47.020.70 Navigacijska in krmilna Navigation and control
oprema equipment
oSIST prEN 303 135 V2.1.2:2020 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 303 135 V2.1.2:2020

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oSIST prEN 303 135 V2.1.2:2020
Draft ETSI EN 303 135 V2.1.2 (2020-08)






HARMONISED EUROPEAN STANDARD
Coastal Surveillance, Vessel Traffic Services and
Harbour Radars (CS/VTS/HR);
Harmonised Standard for access to radio spectrum

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oSIST prEN 303 135 V2.1.2:2020

2 Draft ETSI EN 303 135 V2.1.2 (2020-08)



Reference
REN/ERM-TGMAR-535
Keywords
harmonised standard, maritime, radar regulation

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ETSI

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oSIST prEN 303 135 V2.1.2:2020

3 Draft ETSI EN 303 135 V2.1.2 (2020-08)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 6
3 Definition of terms, symbols and abbreviations . 7
3.1 Terms . 7
3.2 Symbols . 8
3.3 Abbreviations . 8
4 Technical requirements specifications . 9
4.1 Environmental profile . 9
4.2 Conformance requirements . 9
4.2.1 Transmitter requirements . 9
4.2.1.1 Frequency Accuracy. 9
4.2.1.1.1 Definition. 9
4.2.1.1.2 Limits . 9
4.2.1.1.3 Conformance . 9
4.2.1.2 Transmitter power . 10
4.2.1.2.1 Definition. 10
4.2.1.2.2 Limits . 10
4.2.1.2.3 Conformance . 10
4.2.1.3 Measured Bandwidth . 10
4.2.1.3.1 Definition. 10
4.2.1.3.2 Limits . 10
4.2.1.3.3 Conformance . 10
4.2.1.4 Out-of-band emissions . 10
4.2.1.4.1 Definition. 10
4.2.1.4.2 Limits . 11
4.2.1.4.3 Conformance . 12
4.2.1.5 Spurious emissions . 12
4.2.1.5.1 Definition. 12
4.2.1.5.2 Limits . 13
4.2.1.5.3 Conformance . 13
4.2.1.6 Stand-by Mode Emissions . 13
4.2.1.6.1 Definition. 13
4.2.1.6.2 Limits . 14
4.2.1.6.3 Conformance . 14
4.2.2 Receiver requirements . 14
4.2.2.1 System Noise Figure . 14
4.2.2.1.1 Definition. 14
4.2.2.1.2 Limits . 14
4.2.2.1.3 Conformance . 14
4.2.2.2 Receiver Selectivity . 14
4.2.2.2.1 Definition. 14
4.2.2.2.2 Limit . 14
4.2.2.2.3 Conformance . 15
4.2.2.3 Receiver Compression Level . 15
4.2.2.3.1 Definition. 15
4.2.2.3.2 Limit . 15
4.2.2.3.3 Conformance . 15
5 Testing for compliance with technical requirements . 16
5.0 General requirements . 16
ETSI

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oSIST prEN 303 135 V2.1.2:2020

4 Draft ETSI EN 303 135 V2.1.2 (2020-08)
5.1 Environmental conditions for testing . 16
5.1.1 Test Conditions . 16
5.1.2 Normal temperature and humidity . 16
5.1.3 Normal test power supply . 16
5.2 Radio test suites . 16
5.2.1 Transmitter test specification . 16
5.2.1.1 Frequency Accuracy. 16
5.2.1.2 Transmitter power . 16
5.2.1.3 Measured Bandwidth . 17
5.2.1.4 Out-of-Band-emissions . 17
5.2.1.5 Spurious emissions . 19
5.2.1.6 Stand-by Mode Emissions . 20
5.2.2 Receiver test specification . 20
5.2.2.1 System Noise Figure . 20
5.2.2.1.0 General . 20
5.2.2.2 Receiver Selectivity . 20
5.2.2.2.0 General . 20
5.2.2.2.1 Receiver Out-of-Band selectivity . 21
5.2.2.3 Receiver Compression Level . 22
Annex A (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 23
Annex B (normative): Transmission power, Frequency Accuracy and Unwanted Emissions
of radar systems with indirect methods . 24
Annex C (normative): Calculation of the -40 dB Bandwidth . 25
Annex D (informative): Maximum Measurement Uncertainty . 27
Annex E (informative): WR90/WG16/R100 waveguide characteristics . 28
Annex F (normative): Noise figure measurement set-up . 30
Annex G (normative): Compression level and selectivity measurement set-up. 31
Annex H (informative): Checklist . 32
Annex I (informative): Bibliography . 35
Annex J (informative): Change history . 36
History . 37


ETSI

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oSIST prEN 303 135 V2.1.2:2020

5 Draft ETSI EN 303 135 V2.1.2 (2020-08)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables 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 (https://ipr.etsi.org/).
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.
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.
Foreword
This draft Harmonised European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic
compatibility and Radio spectrum Matters (ERM), and is now submitted for the combined Public Enquiry and Vote
phase of the ETSI standards EN Approval Procedure.
The present document has been prepared under the Commission's standardisation request C(2015) 5376 final [i.6] to
provide one voluntary means of conforming to the essential requirements of Directive 2014/53/EU on the harmonisation
of the laws of the Member States relating to the making available on the market of radio equipment and repealing
Directive 1999/5/EC [i.1].
Once the present document is cited in the Official Journal of the European Union under that Directive, compliance with
the normative clauses of the present document given in table A.1 confers, within the limits of the scope of the present
document, a presumption of conformity with the corresponding essential requirements of that Directive and associated
EFTA regulations.

Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 18 months after doa

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

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oSIST prEN 303 135 V2.1.2:2020

6 Draft ETSI EN 303 135 V2.1.2 (2020-08)
1 Scope
The present document specifies technical characteristics and methods of measurements for X-band radar sensors
intended for Coastal Surveillance (CS), Vessel Traffic Services (VTS) and harbour surveillance with the following
characteristics:
• Operating in the following frequency range:
- 8 500 MHz to 10 000 MHz utilizing modulated or unmodulated pulses.
• Transmitter Peak Envelope Power up to 100 kW.
• The transmitter output (from power amplifier) towards the antenna uses a hollow metallic rectangular
waveguide of type WR90/WG16/R100 according to IEC 60153-2 [i.3] with a minimum length of 92 cm
(20 times the wavelength of the waveguide cut-off frequency).
• The antenna is rotating, waveguide-based and passive.
• At the transceiver output an RF-circulator is used.
NOTE: The relationship between the present document and essential requirements of article 3.2 of Directive
2014/53/EU [i.1] is given in annex A.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or non-
specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference/.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] ECC Recommendation (02)05 (2012): "Unwanted emissions".
[2] ERC Recommendation 74-01 (2019): "Unwanted emissions in the spurious domain".
[3] Recommendation ITU-R M.1177-4 (04/2011): "Techniques for measurement of unwanted
emissions of radar 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 specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
ETSI

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oSIST prEN 303 135 V2.1.2:2020

7 Draft ETSI EN 303 135 V2.1.2 (2020-08)
[i.1] Directive 2014/53/EU of the European Parliament and of the Council of 16 April 2014 on the
harmonisation of the laws of the Member States relating to the making available on the market of
radio equipment and repealing Directive 1999/5/EC.
[i.2] Merrill I. Skolnik: "Radar Handbook", 2nd Edition, McGraw Hill publications.
[i.3] IEC 60153-2:2016: "Hollow metallic waveguides. Part 2: Relevant specifications for ordinary
rectangular waveguides".
[i.4] ETSI EG 203 336: "Guide for the selection of technical parameters for the production of
Harmonised Standards covering article 3.1(b) and article 3.2 of Directive 2014/53/EU".
[i.5] Recommendation ITU-R SM.1541-6 (08/2015): "Unwanted emissions in the out-of-band domain".
[i.6] Commission Implementing Decision C(2015) 5376 final of 4.8.2015 on a standardisation request
to the European Committee for Electrotechnical Standardisation and to the European
Telecommunications Standards Institute as regards radio equipment in support of Directive
2014/53/EU of the European Parliament and of the Council.
[i.7] ITU Radio Regulations (2016).
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
active state: state producing the authorized emission
allocated band: frequency span that regionally or nationally is allocated to one or more radio services on a primary or
secondary basis
NOTE: A table of national frequency allocations are normally available from the radio authority for each national
state. Also a generic frequency allocation table is available in the ITU Radio Regulations [i.7].
declared band: band or bands within which the product under test is declared to operate in the applicable operating
modes
NOTE: The declared band for a given region or country is always contained within the allocated band.
idle/standby state: state where the transmitter is available for traffic, but is not in the active state
Minimum Detectable Signal (MDS): measure of the lowest detectable signal amplitude for a given signal type for a
given radar
NOTE: For solid state radars a processing gain can be associated with a received signal. This processing gain has
the effect of lowering the MDS level in comparison to a MDS which is based only on noise temperature.
necessary bandwidth: 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 for a given class of emission
NOTE: This definition is taken from ITU Radio Regulations [i.7].
occupied bandwidth: 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
NOTE 1: This definition is taken from ITU Radio Regulations [i.7].
NOTE 2: Unless otherwise specified in an Recommendation ITU-R for the appropriate class of emission, the value
of β/2 should be taken as 0,5 %.
ETSI

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oSIST prEN 303 135 V2.1.2:2020

8 Draft ETSI EN 303 135 V2.1.2 (2020-08)
operating mode: predefined configuration for a given service accessible to the operator of the radar system
NOTE 1: Several operating modes may be available.
NOTE 2: Changing operating mode might affect the radio characteristics of the radar system.
Peak Envelope Power (PEP): average power supplied to the antenna transmission line by a transmitter during one
radio frequency cycle at the crest of the modulation envelope taken under normal operating conditions
NOTE: This definition is taken from ITU Radio Regulations [i.7].
product configuration: hardware variant of the same typology of system under test (e.g. different power outputs,
magnetrons)
pulse duration: time between the 50 % amplitude (voltage) points
pulse rise time: time taken for the leading edge of the pulse to increase from 10 % to 90 % of the maximum amplitude
(voltage)
receiver selectivity: ability of a receiver to detect and decode a desired signal in the presence of an unwanted
interfering signal outside the B bandwidth.
-40
simple pulse radar: radar using pulsed emissions but not using frequency, phase or power modulation
3.2 Symbols
For the purposes of the present document, the following symbols apply:
B -40 dB bandwidth
-40
B Chirp bandwidth
C
B Necessary bandwidth
N
B 3 dB resolution bandwidth of transceiver
res
dB/dec dB per decade
dBpp dB with respect to peak power
D Detectability Factor (function of PD & Pfa)
no spur
k Boltzmann's constant
NF Noise Factor of the system
sys
P Probability of detection
D
P Probability of false alarm
FA
P Pulse power of transmission
t
t Time
t Pulse duration
p
t Pulse rise time
r
T Temperature in Kelvin
0
T Pulse length (of individual chirp) in seconds
C
λ Wavelength
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AC Alternating Current
CS Coastal Surveillance
CW Continous Wave
dBm Power ratio expressed in decibels (dB) with reference to one milliwatt
dBW Power ratio expressed in decibels (dB) with reference to one Watt
EFTA European Free Trade Association
EM ElectroMagnetic
EN European Norm
ETSI

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9 Draft ETSI EN 303 135 V2.1.2 (2020-08)
FM Frequency Modulation
HR HaRbour
kW kiloWatt
LNA Low Noise Amplifier
LO Local Oscillator
MDS Minimum Detectable Signal
NA Not Applicable
OoB Out-of-Band
PEP Peak Envelope Power
PPI Plan Position Indicator (Display showing the radar video etc)
ppm part(s) per million
RF Radio Frequency
VTS Vessel Traffic Services
WG WaveGuide
4 Technical requirements specifications
4.1 Environmental profile
The technical requirements of the present document apply under the environmental profile for operation of the
equipment, which shall be in accordance with its intended use, but as a minimum, shall be that specified in the test
conditions contained in the present document. The equipment shall comply with all the technical requirements of the
present document at all times when operating within the boundary limits of the operational environmental profile
defined by its intended use.
4.2 Conformance requirements
4.2.1 Transmitter requirements
4.2.1.1 Frequency Accuracy
4.2.1.1.1 Definition
The transmitter of a pulsed radar produces microwave pulses, which cause a broad frequency spectrum, depending on
the pulse duration.
The frequency accuracy is the maximum permissible departure by the centre frequency of the frequency band occupied
by an emission from the assigned frequency or, by the characteristic frequency of an emission from the reference
frequency.
4.2.1.1.2 Limits
The frequency accuracy at the defined operating frequency for radars applying unmodulated pulses shall not exceed
1 250 ppm.
NOTE: This value is defined in a
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