SIST EN 303 981 V1.2.1:2021

Satellite Earth Stations and Systems (SES) - Fixed and in-motion Wide Band Earth Stations communicating with non-geostationary satellite systems (WBES) in the 11 GHz to 14 GHz frequency bands - Harmonised Standard for access to radio spectrum

The present document specifies technical characteristics and methods of measurements for fixed and in-motion Earth
Stations communicating with non-geostationary satellite systems (WBES) in the 11 GHz to 14 GHz FSS frequency
bands, which have the following characteristics:
• The WBES is further defined as one of two classes of Earth stations, class A and class B. The clauses in the
present document apply to both classes unless separately delineated.
• The WBES is designed for both in-motion and stationary operation.
• The WBES operates in-motion on various platforms such as trains, maritime vessels, aircraft and other
vehicles and, therefore, may be subject to occasional disturbances and interruptions in the satellite link.
• The WBES is operating as part of a satellite system used for the provision of broadband communications.
• The WBES is comprised of all the equipment, electrical and mechanical, from the antenna itself to the
interface with other communications equipment on a mobile platform.
• The WBES comprises one or more emitters and the system overview as given in figure 1 should be interpreted
accordingly.
• The transmit and receive frequencies are shown in table 1.
The WBES transmits within the frequency range from 14,0 GHz to 14,50 GHz.
• The WBES receives within the range from 10,70 GHz to 12,75 GHz.
• The Class A WBES transmits at elevation angles of 50° or greater, relative to the horizontal plane.
• The Class B WBES transmits at elevation angles of 25° or greater, relative to the horizontal plane.
• The WBES uses linear or circular polarization.
• The WBES communicates with non-geostationary satellites.
• The WBES is designed for unattended operation.
• The WBES is controlled and monitored by a Network Control Facility (NCF). The NCF is outside the scope of
the present document.
The present document applies to the WBES with its ancillary equipment and its various telecommunication ports, and
when operated within the boundary limits of the operational environmental profile as declared by the manufacturer and
when installed as required by the manufacturer's declaration or in the user documentation.
NOTE: The relationship between the present document and essential requirements of article 3.2 of Directive
2014/53/EU [i.7] is given in annex A.

Satelitske zemeljske postaje in sistemi (SES) - Fiksne in premične širokopasovne zemeljske postaje, ki komunicirajo z negeostacionarnimi satelitskimi sistemi (WBES) v frekvenčnih pasovih od 11 GHz do 14 GHz - Harmonizirani standard za dostop do radijskega spektra

General Information

• Status: Published
• Public Enquiry End Date: 31-Dec-2020
• Publication Date: 22-Apr-2021
• ICS: 33.060.30 - Radio relay and fixed satellite communications systems
• Technical Committee: MOC - Mobile Communications
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 12-Apr-2021
• Due Date: 17-Jun-2021
• Completion Date: 23-Apr-2021
• Directive: 2014/53/EU - 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
• Ref Project: ETSI EN 303 981 V1.2.1 (2021-04) - Satellite Earth Stations and Systems (SES); Fixed and in-motion Wide Band Earth Stations communicating with non-geostationary satellite systems (WBES) in the 11 GHz to 14 GHz frequency bands; Harmonised Standard for access to radio spectrum

Overview

SIST EN 303 981 V1.2.1:2021 is a harmonised standard for Satellite Earth Stations and Systems (SES) that specifies technical characteristics and measurement methods for Fixed and in‑motion Wide Band Earth Stations (WBES) communicating with non‑geostationary satellite systems in the 11 GHz to 14 GHz frequency range. The standard defines two WBES classes (Class A and Class B), covers both stationary and in‑motion platforms (trains, maritime vessels, aircraft, road vehicles), and supports broadband communications with unattended operation and Network Control Facility (NCF) monitoring.

Keywords: SIST EN 303 981, WBES, wide band earth stations, 11 GHz to 14 GHz, harmonised standard, radio spectrum access, non‑geostationary satellite.

Key technical topics and requirements

• Frequency ranges
  • Transmit: 14.0 GHz to 14.50 GHz
  • Receive: 10.70 GHz to 12.75 GHz
• WBES classes & elevation requirements
  • Class A: transmit elevation angles ≥ 50° relative to horizontal
  • Class B: transmit elevation angles ≥ 25°
• Antenna and RF performance
  • Antenna beam pointing accuracy and pointing error detection
  • Off‑axis and on‑axis spurious radiation limits
  • Carrier suppression and conditions for cessation of emissions
  • Receive antenna off‑axis gain pattern, blocking performance, adjacent signal selectivity
• Control & monitoring
  • Control and Monitoring Functions (CMFs) including finite state machine models, processor and transmit subsystem monitoring, control/response channels, network control commands, and inhibition of transmissions
• Conformance & measurement
  • Detailed conformance tests and measurement methods for antenna performance, emissions, monitoring, and fault handling
• Operational profile
  • Applicability limited to equipment operating within the manufacturer‑declared environmental profile and installation/user documentation

Practical applications and users

This harmonised standard is essential for:

• Satellite equipment manufacturers designing WBES for mobile and fixed broadband services
• Satellite network operators and system integrators deploying non‑geostationary constellations
• Test laboratories performing conformance and EMC testing for radio spectrum access
• Regulators and certification bodies assessing compliance with harmonised radio requirements
• OEMs for transportation (maritime, rail, aviation, road vehicles) integrating satellite broadband terminals

Use cases include in‑motion passenger connectivity, maritime broadband, aeronautical data links, and mobile backhaul via non‑GEO broadband satellites.

Related standards

• ETSI EN 303 981 V1.2.1 (2021‑04) - this SIST version is equivalent
• The document notes a relationship to essential requirements of Article 3.2 of Directive 2014/53/EU (see annex A) for radio equipment compliance.

For implementers, SIST EN 303 981 is the go‑to reference for designing, testing and certifying WBES operating in the 11–14 GHz bands with emphasis on antenna pointing, emissions control, and robust control/monitoring for in‑motion and unattended operation.

Standards Content (Sample)

Draft ETSI EN 303 981 V1.1.0 (2020-10)

HARMONISED EUROPEAN STANDARD
Satellite Earth Stations and Systems (SES);
Fixed and in-motion Wide Band Earth Stations communicating
with non-geostationary satellite systems (WBES)
in the 11 GHz to 14 GHz frequency bands;
Harmonised Standard for access to radio spectrum

2 Draft ETSI EN 303 981 V1.1.0 (2020-10)

Reference
DEN/SES-00450
Keywords
broadband, earth station, mobile, regulation,
satellite
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

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
3 Draft ETSI EN 303 981 V1.1.0 (2020-10)
Contents
Intellectual Property Rights . 7
Foreword . 7
Modal verbs terminology . 7
Introduction . 8
1 Scope . 9
2 References . 10
2.1 Normative references . 10
2.2 Informative references . 10
3 Definition of terms, symbols and abbreviations . 11
3.1 Terms . 11
3.2 Symbols . 13
3.3 Abbreviations . 13
4 Technical requirements specifications . 14
4.1 General . 14
4.1.0 Target . 14
4.1.1 Environmental profile . 14
4.1.2 Operating configurations . 14
4.1.3 Presentation of equipment for testing purposes . 14
4.1.4 Choice of model for testing . 14
4.1.5 Peak pointing accuracy . 15
4.1.6 Location and Identification of the WBES . 15
4.1.7 Operation of multiple WBES on a single frequency . 15
4.2 Conformance requirements . 15
4.2.1 Antenna beam pointing . 15
4.2.1.1 Pointing accuracy . 15
4.2.1.1.1 Purpose . 15
4.2.1.1.2 Antenna Beam Pointing error . 15
4.2.1.2 Pointing error detection . 15
4.2.1.2.1 Purpose . 15
4.2.1.2.2 Pointing error detection specification . 15
4.2.1.3 Conformance tests . 16
4.2.2 Off-axis spurious radiation . 16
4.2.2.1 Justification . 16
4.2.2.2 Specification. 16
4.2.2.3 Conformance tests . 17
4.2.3 On-axis spurious radiation . 17
4.2.3.1 Justification . 17
4.2.3.2 Specification. 17
4.2.3.2.1 "Carrier-on" radio state . 17
4.2.3.2.2 "Carrier-off" and "Emissions disabled" radio states . 18
4.2.3.3 Conformance tests . 18
4.2.4 Carrier suppression . 18
4.2.4.1 Justification . 18
4.2.4.2 Specification. 18
4.2.4.3 Conformance tests . 18
4.2.5 Cessation of emissions . 18
4.2.5.1 Justification . 18
4.2.5.2 Specification. 18
4.2.5.2.1 Specification 1: Mode of cessation of emissions . 18
4.2.5.2.2 Specification 2: Conditions under which the WBES shall cease emissions . 19
4.2.5.2.3 Specification 3: Cessation of emissions . 19
4.2.5.2.4 Specification 4: Fault conditions . 20
4.2.5.3 Conformance tests . 20
4.2.6 Location and Identification of the WBES . 20
ETSI
4 Draft ETSI EN 303 981 V1.1.0 (2020-10)
4.2.6.1 Justification . 20
4.2.6.2 Specification. 20
4.2.6.3 Conformance tests . 20
4.2.7 Control and Monitoring Functions (CMF) . 20
4.2.7.1 General - Finite State Machine Model . 20
4.2.7.2 Processor monitoring . 22
4.2.7.2.1 Justification . 22
4.2.7.2.2 Specification . 22
4.2.7.2.3 Conformance tests . 23
4.2.7.3 Transmit subsystem monitoring . 23
4.2.7.3.1 Justification . 23
4.2.7.3.2 Specification . 23
4.2.7.3.3 Conformance tests . 23
4.2.7.4 Power-on/Reset . 23
4.2.7.4.1 Justification . 23
4.2.7.4.2 Specification . 23
4.2.7.4.3 Conformance tests . 23
4.2.7.5 Control Channel (CC) and Response Channel (RC) . 23
4.2.7.5.1 Justification . 23
4.2.7.5.2 Specification . 24
4.2.7.5.3 Conformance tests . 24
4.2.7.6 Network control commands . 24
4.2.7.6.1 Justification . 24
4.2.7.6.2 Specification . 25
4.2.7.6.3 Conformance tests . 25
4.2.7.7 Initial burst transmission . 25
4.2.7.7.1 Justification . 25
4.2.7.7.2 Specification . 25
4.2.7.7.3 Conformance tests . 25
4.2.7.8 Inhibition of transmissions . 26
4.2.7.8.1 Justification . 26
4.2.7.8.2 Specification . 26
4.2.7.8.3 Conformance tests . 26
4.2.8 Receive antenna off-axis gain pattern . 26
4.2.8.1 Justification . 26
4.2.8.2 Specification. 26
4.2.8.2.1 Class A WBES . 26
4.2.8.2.2 Class B WBES . 27
4.2.8.3 Conformance tests . 27
4.2.9 Blocking performance . 27
4.2.9.1 Justification . 27
4.2.9.2 Specification. 27
4.2.9.2.1 Class A WBES . 27
4.2.9.2.2 Class B WBES . 28
4.2.9.3 Conformance tests . 28
4.2.10 Adjacent Signal Selectivity . 28
4.2.10.1 Justification . 28
4.2.10.2 Specification. 28
4.2.10.3 Conformance tests . 28
4.2.11 Image frequency rejection . 28
4.2.11.1 Justification . 28
4.2.11.2 Specification. 28
4.2.11.3 Conformance tests . 29
5 Testing for compliance with technical requirements . 29
5.1 Environmental conditions for testing . 29
5.2 Ancillary Equipment . 29
5.3 Nominated Bandwidth . 29
6 Test methods for all aspects of the WBES . 30
6.1 General . 30
6.1.1 General requirements . 30
ETSI
5 Draft ETSI EN 303 981 V1.1.0 (2020-10)
6.2 Off-axis spurious radiation . 30
6.2.1 General . 30
6.2.2 Test method . 30
6.2.2.1 General . 30
6.2.2.2 Multi-carrier operation . 31
6.2.3 Measurements up to 1 000 MHz . 31
6.2.3.1 Test site . 31
6.2.3.2 Procedure . 31
6.2.4 Measurements above 1 000 MHz . 32
6.2.4.1 General . 32
6.2.4.2 Identification of the significant frequencies of spurious radiation . 32
6.2.4.2.1 Test site. 32
6.2.4.2.2 Procedure . 32
6.2.4.3 Measurement of radiated power levels of identified spurious radiation . 32
6.2.4.3.1 Test site. 32
6.2.4.3.2 Procedure . 33
6.2.4.4 Measurement of conducted spurious radiation at the antenna flange . 34
6.2.4.4.1 Test site. 34
6.2.4.4.2 Procedure . 34
6.3 On-axis spurious radiation . 35
6.3.1 Test method . 35
6.3.1.1 General . 35
6.3.1.2 Test site . 35
6.3.1.3 Method of measurement . 35
6.3.1.3.1 General . 35
6.3.1.3.2 Method of measurement at the antenna flange . 35
6.3.1.3.3 Method of measurement for an EUT with antenna . 37
6.4 Carrier suppression . 38
6.4.1 General . 38
6.4.2 Test method . 38
6.5 Antenna beam pointing . 38
6.5.1 General . 38
6.5.2 Test methods . 39
6.6 Cessation of emissions of the WBES . 40
6.6.1 General . 40
6.6.2 Test Method . 40
6.6.2.1 Required documentation . 40
6.6.2.2 Cessation of emissions from the "Transmission enabled" state . 40
6.6.2.3 Cessation of emission from the "Transmission disabled" state . 40
6.6.2.4 Cessation of emission from the "Initial Phase" state . 41
6.6.2.4.1 EUTs transmitting initial bursts . 41
6.6.2.4.2 EUTs not transmitting initial bursts . 41
6.6.2.5 "Single action" means of cessation of emissions. 41
6.6.2.6 Fault conditions . 42
6.7 Location and Identification of WBES . 42
6.7.1 Test arrangement . 42
6.7.2 Test method . 42
6.8 Control and monitoring functions . 43
6.8.1 General . 43
6.8.2 Test arrangement . 43
6.8.3 Processor monitoring- Test method . 43
6.8.4 Transmit subsystem monitoring-Test method . 43
6.8.5 Power-on/Reset-Test method . 43
6.8.6 Control Channel and Response Channel -Test method . 44
6.8.7 Network Control commands-Test method . 45
6.8.8 Initial burst transmission-Test method . 46
6.8.9 Inhibition of transmission-Test method . 46
6.9 Antenna off-axis gain pattern . 46
6.9.1 Test Method . 46
6.9.1.1 Test site . 46
6.9.1.2 Method of measurement for EUT antenna with linear polarization . 47
6.9.1.3 Method of measurement for antennas with circular polarization . 47
ETSI
6 Draft ETSI EN 303 981 V1.1.0 (2020-10)
6.10 Blocking performance . 48
6.10.1 Test method - Class A/B WBES . 48
6.11 Adjacent Signal Selectivity . 48
6.11.1 Test method . 48
Annex A (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 50
Annex B (normative): Radiated measurement . 52
B.1 General . 52
B.2 Free Field Test sites and general arrangements for measurements involving the use of radiated
fields . 52
B.2.1 Anechoic Chamber . 52
B.2.2 Anechoic Chamber with a conductive ground plane . 53
B.2.3 Open Area Test Site (OATS) . 55
B.2.4 Minimum requirements for free field test sites. 56
B.2.4.1 Measurements above 18 GHz . 56
B.2.4.2 Test antenna . 56
B.2.4.3 Substitution antenna . 57
B.2.4.4 Measuring antenna . 57
B.2.5 Guidance on the use of free field radiation test sites . 57
B.2.5.1 General . 57
B.2.5.2 Verification of the test site . 57
B.2.5.3 Preparation of the EUT . 57
B.2.5.4 Power supplies to the EUT . 57
B.2.5.5 Range length . 58
B.2.5.6 Site preparation . 58
B.2.5.7 Coupling of signals . 59
B.2.5.8 Standard test methods . 59
B.2.5.8.0 General . 59
B.2.5.8.1 Calibrated setup . 59
B.2.5.8.2 Substitution method . 59
B.3 Guidance on the use of indirect far field test sites . 61
B.3.1 General . 61
B.3.2 Far-field criteria . 62
B.3.3 Calibration Measurement Procedure . 62
B.4 Guidance on the use of near-field-to-far-field transform test sites . 63
B.4.1 General . 63
B.4.2 Calibration Measurement Procedure . 64
Annex C (normative): Conducted measurements . 66
Annex D (informative): General Requirements for RF Cables . 67
Annex E (informative): RF Waveguides . 68
Annex F (informative): Measurement Equipment . 69
F.1 Special considerations for the interpretation of measurement results . 69
F.2 Maximum measurement uncertainty . 69
F.3 Measuring receiver . 70
Annex G (informative): Applicability of parameters given in ETSI EG 203 336 . 72
Annex H (informative): Bibliography . 74
Annex I (informative): Change history . 75
History . 76

ETSI
7 Draft ETSI EN 303 981 V1.1.0 (2020-10)
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 Satellite Earth
Stations and Systems (SES), 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.1] 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.7].
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
8 Draft ETSI EN 303 981 V1.1.0 (2020-10)
Introduction
The present document is part of a set of standards developed by ETSI and is designed to fit in a modular structure to
cover all radio and telecommunications terminal equipment within the scope of the RE Directive [i.7]. The modular
structure is shown in ETSI EG 201 399 [i.2].
The present document is largely based on ETSI EN 303 979 [i.4], for ESOMPs operating with NGSO satellites, and
ETSI EN 303 980 [i.5] for NEST operating with NGSO satellites.
The present document may also be applicable to the frequency band 14,0 GHz to 14,50 GHz (Earth-to-space) and
10,70 GHz to 12,75 GHz (space-to-Earth) subject to national regulation.
Annex A (informative) provides the relationship between the present document and the essential requirements of
Directive 2014/53/EU [i.7].
Annex B (normative) describes methods of taking radiated measurements.
Annex C (normative) describes methods of taking conducted measurements.
Annex D (informative) describes requirements for RF measurement cables.
Annex E (informative) describes use of RF waveguides.
Annex F (informative) describes measurement equipment.
Annex G (informative) describes the applicability of parameters in ETSI EG 203 336 [i.8].
Annex H (informative): Bibliography.
Annex I (informative): Change history.
Recital 10 of Directive 2014/53/EU [i.7] states that "in order to ensure that radio equipment uses the radio spectrum
effectively and supports the efficient use of radio spectrum, radio equipment should be constructed so that: in the case
of a transmitter, when the transmitter is properly installed, maintained and used for its intended purpose it generates
radio waves emissions that do not create harmful interference, while unwanted radio waves emissions generated by the
transmitter (e.g. in adjacent channels) with a potential negative impact on the goals of radio spectrum policy should be
limited to such a level that, according to the state of the art, harmful interference is avoided; and, in the case of a
receiver, it has a level of performance that allows it to operate as intended and protects it against the risk of harmful
interference, in particular from shared or adjacent channels, and, in so doing, supports improvements in the efficient
use of shared or adjacent channels".
Recital 11 of Directive 2014/53/EU [i.7] states that "although receivers do not themselves cause harmful interference,
reception capabilities are an increasingly important factor in ensuring the efficient use of radio spectrum by way of an
increased resilience of receivers against harmful interference and unwanted signals on the basis of the relevant essential
requirements of Union harmonisation legislation".
As a consequence, the present document includes both transmitting and receiving parameters aiming to maximize the
efficient use of radio spectrum.
ETSI
9 Draft ETSI EN 303 981 V1.1.0 (2020-10)
1 Scope
The present document specifies technical characteristics and methods of measurements for fixed and in-motion Earth
Stations communicating with non-geostationary satellite systems (WBES) in the 11 GHz to 14 GHz FSS frequency
bands, which have the following characteristics:
• The WBES is further defined as one of two classes of Earth stations, class A and class B. The clauses in the
present document apply to both classes unless separately delineated.
• The WBES is designed for both in-motion and stationary operation.
• The WBES operates in-motion on various platforms such as trains, maritime vesse
...

Final draft ETSI EN 303 981 V1.2.0 (2021-02)

HARMONISED EUROPEAN STANDARD
Satellite Earth Stations and Systems (SES);
Fixed and in-motion Wide Band Earth Stations communicating
with non-geostationary satellite systems (WBES)
in the 11 GHz to 14 GHz frequency bands;
Harmonised Standard for access to radio spectrum

2 Final draft ETSI EN 303 981 V1.2.0 (2021-02)

Reference
DEN/SES-00450
Keywords
broadband, earth station, mobile, regulation,
satellite
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

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 2021.
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
3 Final draft ETSI EN 303 981 V1.2.0 (2021-02)
Contents
Intellectual Property Rights . 7
Foreword . 7
Modal verbs terminology . 7
Introduction . 8
1 Scope . 9
2 References . 10
2.1 Normative references . 10
2.2 Informative references . 10
3 Definition of terms, symbols and abbreviations . 11
3.1 Terms . 11
3.2 Symbols . 13
3.3 Abbreviations . 13
4 Technical requirements specifications . 14
4.1 General . 14
4.1.0 Target . 14
4.1.1 Environmental profile . 14
4.1.2 Operating configurations . 14
4.1.3 Presentation of equipment for testing purposes . 14
4.1.4 Choice of model for testing . 15
4.1.5 Peak pointing accuracy . 15
4.1.6 Location and Identification of the WBES . 15
4.1.7 Operation of multiple WBES on a single frequency . 15
4.2 Conformance requirements . 15
4.2.1 Antenna beam pointing . 15
4.2.1.1 Pointing accuracy . 15
4.2.1.1.1 Purpose . 15
4.2.1.1.2 Antenna Beam Pointing error . 15
4.2.1.2 Pointing error detection . 16
4.2.1.2.1 Purpose . 16
4.2.1.2.2 Pointing error detection specification . 16
4.2.1.3 Conformance tests . 16
4.2.2 Off-axis spurious radiation . 16
4.2.2.1 Justification . 16
4.2.2.2 Specification. 16
4.2.2.3 Conformance tests . 17
4.2.3 On-axis spurious radiation . 17
4.2.3.1 Justification . 17
4.2.3.2 Specification. 18
4.2.3.2.1 "Carrier-on" radio state . 18
4.2.3.2.2 "Carrier-off" and "Emissions disabled" radio states . 18
4.2.3.3 Conformance tests . 18
4.2.4 Carrier suppression . 18
4.2.4.1 Justification . 18
4.2.4.2 Specification. 18
4.2.4.3 Conformance tests . 18
4.2.5 Cessation of emissions . 19
4.2.5.1 Justification . 19
4.2.5.2 Specification. 19
4.2.5.2.1 Specification 1: Mode of cessation of emissions . 19
4.2.5.2.2 Specification 2: Conditions under which the WBES shall cease emissions . 19
4.2.5.2.3 Specification 3: Cessation of emissions . 20
4.2.5.2.4 Specification 4: Fault conditions . 20
4.2.5.3 Conformance tests . 20
4.2.6 Location and Identification of the WBES . 20
ETSI
4 Final draft ETSI EN 303 981 V1.2.0 (2021-02)
4.2.6.1 Justification . 20
4.2.6.2 Specification. 20
4.2.6.3 Conformance tests . 20
4.2.7 Control and Monitoring Functions (CMF) . 21
4.2.7.1 General - Finite State Machine Model . 21
4.2.7.2 Processor monitoring . 23
4.2.7.2.1 Justification . 23
4.2.7.2.2 Specification . 23
4.2.7.2.3 Conformance tests . 24
4.2.7.3 Transmit subsystem monitoring . 24
4.2.7.3.1 Justification . 24
4.2.7.3.2 Specification . 24
4.2.7.3.3 Conformance tests . 24
4.2.7.4 Power-on/Reset . 24
4.2.7.4.1 Justification . 24
4.2.7.4.2 Specification . 24
4.2.7.4.3 Conformance tests . 24
4.2.7.5 Control Channel (CC) and Response Channel (RC) . 24
4.2.7.5.1 Justification . 24
4.2.7.5.2 Specification . 25
4.2.7.5.3 Conformance tests . 25
4.2.7.6 Network control commands . 25
4.2.7.6.1 Justification . 25
4.2.7.6.2 Specification . 26
4.2.7.6.3 Conformance tests . 26
4.2.7.7 Initial burst transmission . 26
4.2.7.7.1 Justification . 26
4.2.7.7.2 Specification . 26
4.2.7.7.3 Conformance tests . 26
4.2.7.8 Inhibition of transmissions . 27
4.2.7.8.1 Justification . 27
4.2.7.8.2 Specification . 27
4.2.7.8.3 Conformance tests . 27
4.2.8 Receive antenna off-axis gain pattern . 27
4.2.8.1 Justification . 27
4.2.8.2 Specification. 27
4.2.8.2.1 Class A WBES . 27
4.2.8.2.2 Class B WBES . 28
4.2.8.3 Conformance tests . 28
4.2.9 Blocking performance . 28
4.2.9.1 Justification . 28
4.2.9.2 Specification. 28
4.2.9.2.1 Class A WBES . 28
4.2.9.2.2 Class B WBES . 29
4.2.9.3 Conformance tests . 29
4.2.10 Adjacent Signal Selectivity . 29
4.2.10.1 Justification . 29
4.2.10.2 Specification. 29
4.2.10.3 Conformance tests . 29
4.2.11 Image frequency rejection . 29
4.2.11.1 Justification . 29
4.2.11.2 Specification. 29
4.2.11.3 Conformance tests . 30
5 Testing for compliance with technical requirements . 30
5.1 Environmental conditions for testing . 30
5.2 Ancillary Equipment . 30
5.3 Nominated Bandwidth . 30
6 Test methods for all aspects of the WBES . 31
6.1 General . 31
6.1.1 General requirements . 31
ETSI
5 Final draft ETSI EN 303 981 V1.2.0 (2021-02)
6.2 Off-axis spurious radiation . 31
6.2.1 General . 31
6.2.2 Test method . 31
6.2.2.1 General . 31
6.2.2.2 Multi-carrier operation . 32
6.2.3 Measurements up to 1 000 MHz . 32
6.2.3.1 Test site . 32
6.2.3.2 Procedure . 32
6.2.4 Measurements above 1 000 MHz . 33
6.2.4.1 General . 33
6.2.4.2 Identification of the significant frequencies of spurious radiation . 33
6.2.4.2.1 Test site. 33
6.2.4.2.2 Procedure . 33
6.2.4.3 Measurement of radiated power levels of identified spurious radiation . 33
6.2.4.3.1 Test site. 33
6.2.4.3.2 Procedure . 34
6.2.4.4 Measurement of conducted spurious radiation at the antenna flange . 35
6.2.4.4.1 Test site. 35
6.2.4.4.2 Procedure . 35
6.3 On-axis spurious radiation . 36
6.3.1 Test method . 36
6.3.1.1 General . 36
6.3.1.2 Test site . 36
6.3.1.3 Method of measurement . 36
6.3.1.3.1 General . 36
6.3.1.3.2 Method of measurement at the antenna flange . 36
6.3.1.3.3 Method of measurement for an EUT with antenna . 38
6.4 Carrier suppression . 39
6.4.1 General . 39
6.4.2 Test method . 39
6.5 Antenna beam pointing . 39
6.5.1 General . 39
6.5.2 Test methods . 40
6.6 Cessation of emissions of the WBES . 41
6.6.1 General . 41
6.6.2 Test Method . 41
6.6.2.1 Required documentation . 41
6.6.2.2 Cessation of emissions from the "Transmission enabled" state . 41
6.6.2.3 Cessation of emission from the "Transmission disabled" state . 41
6.6.2.4 Cessation of emission from the "Initial Phase" state . 42
6.6.2.4.1 EUTs transmitting initial bursts . 42
6.6.2.4.2 EUTs not transmitting initial bursts . 42
6.6.2.5 "Single action" means of cessation of emissions. 42
6.6.2.6 Fault conditions . 43
6.7 Location and Identification of WBES . 43
6.7.1 Test arrangement . 43
6.7.2 Test method . 43
6.8 Control and monitoring functions . 44
6.8.1 General . 44
6.8.2 Test arrangement . 44
6.8.3 Processor monitoring- Test method . 44
6.8.4 Transmit subsystem monitoring-Test method . 44
6.8.5 Power-on/Reset-Test method . 44
6.8.6 Control Channel and Response Channel -Test method . 45
6.8.7 Network Control commands-Test method . 46
6.8.8 Initial burst transmission-Test method . 47
6.8.9 Inhibition of transmission-Test method . 47
6.9 Antenna off-axis gain pattern . 47
6.9.1 Test Method . 47
6.9.1.1 Test site . 47
6.9.1.2 Method of measurement for EUT antenna with linear polarization . 48
6.9.1.3 Method of measurement for antennas with circular polarization . 48
ETSI
6 Final draft ETSI EN 303 981 V1.2.0 (2021-02)
6.10 Blocking performance . 49
6.10.1 Test method - Class A/B WBES . 49
6.11 Adjacent Signal Selectivity . 49
6.11.1 Test method . 49
Annex A (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 51
Annex B (normative): Radiated measurement . 53
B.1 General . 53
B.2 Free Field Test sites and general arrangements for measurements involving the use of radiated
fields . 53
B.2.1 Anechoic Chamber . 53
B.2.2 Anechoic Chamber with a conductive ground plane . 54
B.2.3 Open Area Test Site (OATS) . 56
B.2.4 Minimum requirements for free field test sites. 57
B.2.4.1 Measurements above 18 GHz . 57
B.2.4.2 Test antenna . 57
B.2.4.3 Substitution antenna . 58
B.2.4.4 Measuring antenna . 58
B.2.5 Guidance on the use of free field radiation test sites . 58
B.2.5.1 General . 58
B.2.5.2 Verification of the test site . 58
B.2.5.3 Preparation of the EUT . 58
B.2.5.4 Power supplies to the EUT . 58
B.2.5.5 Range length . 59
B.2.5.6 Site preparation . 59
B.2.5.7 Coupling of signals . 60
B.2.5.8 Standard test methods . 60
B.2.5.8.0 General . 60
B.2.5.8.1 Calibrated setup . 60
B.2.5.8.2 Substitution method . 60
B.3 Guidance on the use of indirect far field test sites . 62
B.3.1 General . 62
B.3.2 Far-field criteria . 63
B.3.3 Calibration Measurement Procedure . 63
B.4 Guidance on the use of near-field-to-far-field transform test sites . 64
B.4.1 General . 64
B.4.2 Calibration Measurement Procedure . 65
Annex C (normative): Conducted measurements . 67
Annex D (informative): General Requirements for RF Cables . 68
Annex E (informative): RF Waveguides . 69
Annex F (informative): Measurement Equipment . 70
F.1 Special considerations for the interpretation of measurement results . 70
F.2 Maximum measurement uncertainty . 70
F.3 Measuring receiver . 71
Annex G (informative): Applicability of parameters given in ETSI EG 203 336 . 73
Annex H (informative): Bibliography . 75
Annex I (informative): Change history . 76
History . 77

ETSI
7 Final draft ETSI EN 303 981 V1.2.0 (2021-02)
Intellectual Property Rights
Essential patents
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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.
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ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
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 final draft Harmonised European Standard (EN) has been produced by ETSI Technical Committee Satellite Earth
Stations and Systems (SES), and is now submitted for the Vote phase of the ETSI standards EN Approval Procedure.
The present document has been prepared under the Commission's standardisation request C(2015) 5376 final [i.1] 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.7].
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
8 Final draft ETSI EN 303 981 V1.2.0 (2021-02)
Introduction
The present document is part of a set of standards developed by ETSI and is designed to fit in a modular structure to
cover all radio and telecommunications terminal equipment within the scope of the RE Directive [i.7]. The modular
structure is shown in ETSI EG 201 399 [i.2].
The present document is largely based on ETSI EN 303 979 [i.4], for ESOMPs operating with NGSO satellites, and
ETSI EN 303 980 [i.5] for NEST operating with NGSO satellites.
The present document may also be applicable to the frequency band 14,0 GHz to 14,50 GHz (Earth-to-space) and
10,70 GHz to 12,75 GHz (space-to-Earth) subject to national regulation.
Annex A (informative) provides the relationship between the present document and the essential requirements of
Directive 2014/53/EU [i.7].
Annex B (normative) describes methods of taking radiated measurements.
Annex C (normative) describes methods of taking conducted measurements.
Annex D (informative) describes requirements for RF measurement cables.
Annex E (informative) describes use of RF waveguides.
Annex F (informative) describes measurement equipment.
Annex G (informative) describes the applicability of parameters in ETSI EG 203 336 [i.8].
Annex H (informative) is the Bibliography.
Annex I (informative) is the Change history.
Recital 10 of Directive 2014/53/EU [i.7] states that "in order to ensure that radio equipment uses the radio spectrum
effectively and supports the efficient use of radio spectrum, radio equipment should be constructed so that: in the case
of a transmitter, when the transmitter is properly installed, maintained and used for its intended purpose it generates
radio waves emissions that do not create harmful interference, while unwanted radio waves emissions generated by the
transmitter (e.g. in adjacent channels) with a potential negative impact on the goals of radio spectrum policy should be
limited to such a level that, according to the state of the art, harmful interference is avoided; and, in the case of a
receiver, it has a level of performance that allows it to operate as intended and protects it against the risk of harmful
interference, in particular from shared or adjacent channels, and, in so doing, supports improvements in the efficient
use of shared or adjacent channels".
Recital 11 of Directive 2014/53/EU [i.7] states that "although receivers do not themselves cause harmful interference,
reception capabilities are an increasingly important factor in ensuring the efficient use of radio spectrum by way of an
increased resilience of receivers against harmful interference and unwanted signals on the basis of the relevant essential
requirements of Union harmonisation legislation".
As a consequence, the present document includes both transmitting and receiving parameters aiming to maximize the
efficient use of radio spectrum.
ETSI
9 Final draft ETSI EN 303 981 V1.2.0 (2021-02)
1 Scope
The present document specifies technical characteristics and methods of measurements for fixed and in-motion Earth
Stations communicating with non-geostationary satellite systems (WBES) in the 11 GHz to 14 GHz FSS frequency
bands, which have the following characteristics:
• The WBES is further defined as one of two classes of Earth stations, class A and class B. The clauses in the
present document apply to both classes unless separately delineated.
• The WBES is designed for both in-motion and stationary operation.
• The WBES operates in-motion on var
...

HARMONISED EUROPEAN STANDARD
Satellite Earth Stations and Systems (SES);
Fixed and in-motion Wide Band Earth Stations communicating
with non-geostationary satellite systems (WBES)
in the 11 GHz to 14 GHz frequency bands;
Harmonised Standard for access to radio spectrum

2 ETSI EN 303 981 V1.2.1 (2021-04)

Reference
DEN/SES-00450
Keywords
broadband, earth station, mobile, regulation,
satellite
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ETSI
3 ETSI EN 303 981 V1.2.1 (2021-04)
Contents
Intellectual Property Rights . 7
Foreword . 7
Modal verbs terminology . 7
Introduction . 8
1 Scope . 9
2 References . 10
2.1 Normative references . 10
2.2 Informative references . 10
3 Definition of terms, symbols and abbreviations . 11
3.1 Terms . 11
3.2 Symbols . 13
3.3 Abbreviations . 13
4 Technical requirements specifications . 14
4.1 General . 14
4.1.0 Target . 14
4.1.1 Environmental profile . 14
4.1.2 Operating configurations . 14
4.1.3 Presentation of equipment for testing purposes . 14
4.1.4 Choice of model for testing . 15
4.1.5 Peak pointing accuracy . 15
4.1.6 Location and Identification of the WBES . 15
4.1.7 Operation of multiple WBES on a single frequency . 15
4.2 Conformance requirements . 15
4.2.1 Antenna beam pointing . 15
4.2.1.1 Pointing accuracy . 15
4.2.1.1.1 Purpose . 15
4.2.1.1.2 Antenna Beam Pointing error . 15
4.2.1.2 Pointing error detection . 16
4.2.1.2.1 Purpose . 16
4.2.1.2.2 Pointing error detection specification . 16
4.2.1.3 Conformance tests . 16
4.2.2 Off-axis spurious radiation . 16
4.2.2.1 Justification . 16
4.2.2.2 Specification. 16
4.2.2.3 Conformance tests . 17
4.2.3 On-axis spurious radiation . 17
4.2.3.1 Justification . 17
4.2.3.2 Specification. 18
4.2.3.2.1 "Carrier-on" radio state . 18
4.2.3.2.2 "Carrier-off" and "Emissions disabled" radio states . 18
4.2.3.3 Conformance tests . 18
4.2.4 Carrier suppression . 18
4.2.4.1 Justification . 18
4.2.4.2 Specification. 18
4.2.4.3 Conformance tests . 18
4.2.5 Cessation of emissions . 19
4.2.5.1 Justification . 19
4.2.5.2 Specification. 19
4.2.5.2.1 Specification 1: Mode of cessation of emissions . 19
4.2.5.2.2 Specification 2: Conditions under which the WBES shall cease emissions . 19
4.2.5.2.3 Specification 3: Cessation of emissions . 20
4.2.5.2.4 Specification 4: Fault conditions . 20
4.2.5.3 Conformance tests . 20
4.2.6 Location and Identification of the WBES . 20
ETSI
4 ETSI EN 303 981 V1.2.1 (2021-04)
4.2.6.1 Justification . 20
4.2.6.2 Specification. 20
4.2.6.3 Conformance tests . 20
4.2.7 Control and Monitoring Functions (CMFs) . 21
4.2.7.1 General - Finite State Machine Model . 21
4.2.7.2 Processor monitoring . 23
4.2.7.2.1 Justification . 23
4.2.7.2.2 Specification . 23
4.2.7.2.3 Conformance tests . 24
4.2.7.3 Transmit subsystem monitoring . 24
4.2.7.3.1 Justification . 24
4.2.7.3.2 Specification . 24
4.2.7.3.3 Conformance tests . 24
4.2.7.4 Power-on/Reset . 24
4.2.7.4.1 Justification . 24
4.2.7.4.2 Specification . 24
4.2.7.4.3 Conformance tests . 24
4.2.7.5 Control Channel (CC) and Response Channel (RC) . 24
4.2.7.5.1 Justification . 24
4.2.7.5.2 Specification . 25
4.2.7.5.3 Conformance tests . 25
4.2.7.6 Network control commands . 25
4.2.7.6.1 Justification . 25
4.2.7.6.2 Specification . 26
4.2.7.6.3 Conformance tests . 26
4.2.7.7 Initial burst transmission . 26
4.2.7.7.1 Justification . 26
4.2.7.7.2 Specification . 26
4.2.7.7.3 Conformance tests . 26
4.2.7.8 Inhibition of transmissions . 27
4.2.7.8.1 Justification . 27
4.2.7.8.2 Specification . 27
4.2.7.8.3 Conformance tests . 27
4.2.8 Receive antenna off-axis gain pattern . 27
4.2.8.1 Justification . 27
4.2.8.2 Specification. 27
4.2.8.2.1 Class A WBES . 27
4.2.8.2.2 Class B WBES . 28
4.2.8.3 Conformance tests . 28
4.2.9 Blocking performance . 28
4.2.9.1 Justification . 28
4.2.9.2 Specification. 28
4.2.9.2.1 Class A WBES . 28
4.2.9.2.2 Class B WBES . 29
4.2.9.3 Conformance tests . 29
4.2.10 Adjacent Signal Selectivity . 29
4.2.10.1 Justification . 29
4.2.10.2 Specification. 29
4.2.10.3 Conformance tests . 29
4.2.11 Image frequency rejection . 29
4.2.11.1 Justification . 29
4.2.11.2 Specification. 29
4.2.11.3 Conformance tests . 30
5 Testing for compliance with technical requirements . 30
5.1 Environmental conditions for testing . 30
5.2 Ancillary Equipment . 30
5.3 Nominated Bandwidth . 30
6 Test methods for all aspects of the WBES . 31
6.1 General . 31
6.1.1 General requirements . 31
ETSI
5 ETSI EN 303 981 V1.2.1 (2021-04)
6.2 Off-axis spurious radiation . 31
6.2.1 General . 31
6.2.2 Test method . 31
6.2.2.1 General . 31
6.2.2.2 Multi-carrier operation . 32
6.2.3 Measurements up to 1 000 MHz . 32
6.2.3.1 Test site . 32
6.2.3.2 Procedure . 32
6.2.4 Measurements above 1 000 MHz . 33
6.2.4.1 General . 33
6.2.4.2 Identification of the significant frequencies of spurious radiation . 33
6.2.4.2.1 Test site. 33
6.2.4.2.2 Procedure . 33
6.2.4.3 Measurement of radiated power levels of identified spurious radiation . 33
6.2.4.3.1 Test site. 33
6.2.4.3.2 Procedure . 34
6.2.4.4 Measurement of conducted spurious radiation at the antenna flange . 35
6.2.4.4.1 Test site. 35
6.2.4.4.2 Procedure . 35
6.3 On-axis spurious radiation . 36
6.3.1 Test method . 36
6.3.1.1 General . 36
6.3.1.2 Test site . 36
6.3.1.3 Method of measurement . 36
6.3.1.3.1 General . 36
6.3.1.3.2 Method of measurement at the antenna flange . 36
6.3.1.3.3 Method of measurement for an EUT with antenna . 38
6.4 Carrier suppression . 39
6.4.1 General . 39
6.4.2 Test method . 39
6.5 Antenna beam pointing . 39
6.5.1 General . 39
6.5.2 Test methods . 40
6.6 Cessation of emissions of the WBES . 41
6.6.1 General . 41
6.6.2 Test Method . 41
6.6.2.1 Required documentation . 41
6.6.2.2 Cessation of emissions from the "Transmission enabled" state . 41
6.6.2.3 Cessation of emission from the "Transmission disabled" state . 41
6.6.2.4 Cessation of emission from the "Initial Phase" state . 42
6.6.2.4.1 EUTs transmitting initial bursts . 42
6.6.2.4.2 EUTs not transmitting initial bursts . 42
6.6.2.5 "Single action" means of cessation of emissions. 42
6.6.2.6 Fault conditions . 43
6.7 Location and Identification of WBES . 43
6.7.1 Test arrangement . 43
6.7.2 Test method . 43
6.8 Control and monitoring functions . 44
6.8.1 General . 44
6.8.2 Test arrangement . 44
6.8.3 Processor monitoring- Test method . 44
6.8.4 Transmit subsystem monitoring-Test method . 44
6.8.5 Power-on/Reset-Test method . 44
6.8.6 Control Channel and Response Channel -Test method . 45
6.8.7 Network Control commands-Test method . 46
6.8.8 Initial burst transmission-Test method . 47
6.8.9 Inhibition of transmission-Test method . 47
6.9 Antenna off-axis gain pattern . 47
6.9.1 Test Method . 47
6.9.1.1 Test site . 47
6.9.1.2 Method of measurement for EUT antenna with linear polarization . 48
6.9.1.3 Method of measurement for antennas with circular polarization . 48
ETSI
6 ETSI EN 303 981 V1.2.1 (2021-04)
6.10 Blocking performance . 49
6.10.1 Test method - Class A/B WBES . 49
6.11 Adjacent Signal Selectivity . 49
6.11.1 Test method . 49
Annex A (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 51
Annex B (normative): Radiated measurement . 53
B.1 General . 53
B.2 Free Field Test sites and general arrangements for measurements involving the use of radiated
fields . 53
B.2.1 Anechoic Chamber . 53
B.2.2 Anechoic Chamber with a conductive ground plane . 54
B.2.3 Open Area Test Site (OATS) . 56
B.2.4 Minimum requirements for free field test sites. 57
B.2.4.1 Measurements above 18 GHz . 57
B.2.4.2 Test antenna . 57
B.2.4.3 Substitution antenna . 58
B.2.4.4 Measuring antenna . 58
B.2.5 Guidance on the use of free field radiation test sites . 58
B.2.5.1 General . 58
B.2.5.2 Verification of the test site . 58
B.2.5.3 Preparation of the EUT . 58
B.2.5.4 Power supplies to the EUT . 58
B.2.5.5 Range length . 59
B.2.5.6 Site preparation . 59
B.2.5.7 Coupling of signals . 60
B.2.5.8 Standard test methods . 60
B.2.5.8.0 General . 60
B.2.5.8.1 Calibrated setup . 60
B.2.5.8.2 Substitution method . 60
B.3 Guidance on the use of indirect far field test sites . 62
B.3.1 General . 62
B.3.2 Far-field criteria . 63
B.3.3 Calibration Measurement Procedure . 63
B.4 Guidance on the use of near-field-to-far-field transform test sites . 64
B.4.1 General . 64
B.4.2 Calibration Measurement Procedure . 65
Annex C (normative): Conducted measurements . 67
Annex D (informative): General Requirements for RF Cables . 68
Annex E (informative): RF Waveguides . 69
Annex F (informative): Measurement Equipment . 70
F.1 Special considerations for the interpretation of measurement results . 70
F.2 Maximum measurement uncertainty . 70
F.3 Measuring receiver . 71
Annex G (informative): Applicability of parameters given in ETSI EG 203 336 . 73
Annex H (informative): Bibliography . 75
Annex I (informative): Change history . 76
History . 77

ETSI
7 ETSI EN 303 981 V1.2.1 (2021-04)
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 Satellite Earth Stations
and Systems (SES).
The present document has been prepared under the Commission's standardisation request C(2015) 5376 final [i.1] 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.7].
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: 6 April 2021
Date of latest announcement of this EN (doa): 31 July 2021
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 January 2022
Date of withdrawal of any conflicting National Standard (dow): 31 January 2023

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
8 ETSI EN 303 981 V1.2.1 (2021-04)
Introduction
The present document is part of a set of standards developed by ETSI and is designed to fit in a modular structure to
cover all radio and telecommunications terminal equipment within the scope of the RE Directive [i.7]. The modular
structure is shown in ETSI EG 201 399 [i.2].
The present document is largely based on ETSI EN 303 979 [i.4], for ESOMPs operating with NGSO satellites, and
ETSI EN 303 980 [i.5] for NEST operating with NGSO satellites.
The present document may also be applicable to the frequency band 14,0 GHz to 14,50 GHz (Earth-to-space) and
10,70 GHz to 12,75 GHz (space-to-Earth) subject to national regulation.
Annex A (informative) provides the relationship between the present document and the essential requirements of
Directive 2014/53/EU [i.7].
Annex B (normative) describes methods of taking radiated measurements.
Annex C (normative) describes methods of taking conducted measurements.
Annex D (informative) describes requirements for RF measurement cables.
Annex E (informative) describes use of RF waveguides.
Annex F (informative) describes measurement equipment.
Annex G (informative) describes the applicability of parameters in ETSI EG 203 336 [i.8].
Annex H (informative) is the Bibliography.
Annex I (informative) is the Change history.
Recital 10 of Directive 2014/53/EU [i.7] states that "in order to ensure that radio equipment uses the radio spectrum
effectively and supports the efficient use of radio spectrum, radio equipment should be constructed so that: in the case
of a transmitter, when the transmitter is properly installed, maintained and used for its intended purpose it generates
radio waves emissions that do not create harmful interference, while unwanted radio waves emissions generated by the
transmitter (e.g. in adjacent channels) with a potential negative impact on the goals of radio spectrum policy should be
limited to such a level that, according to the state of the art, harmful interference is avoided; and, in the case of a
receiver, it has a level of performance that allows it to operate as intended and protects it against the risk of harmful
interference, in particular from shared or adjacent channels, and, in so doing, supports improvements in the efficient
use of shared or adjacent channels".
Recital 11 of Directive 2014/53/EU [i.7] states that "although receivers do not themselves cause harmful interference,
reception capabilities are an increasingly important factor in ensuring the efficient use of radio spectrum by way of an
increased resilience of receivers against harmful interference and unwanted signals on the basis of the relevant essential
requirements of Union harmonisation legislation".
As a consequence, the present document includes both transmitting and receiving parameters aiming to maximize the
efficient use of radio spectrum.
ETSI
9 ETSI EN 303 981 V1.2.1 (2021-04)
1 Scope
The present document specifies technical characteristics and methods of measurements for fixed and in-motion Earth
Stations communicating with non-geostationary satellite systems (WBES) in the 11 GHz to 14 GHz FSS frequency
bands, which have the following characteristics:
• The WBES is further defined as one of two classes of Earth stations, class A and class B. The clauses in the
present document apply to both classes unless separately delineated.
• The WBES is designed for both in-motion and stationary operation.
• The WBES operates in-motion on various platforms such as trains, maritime vessels, aircraft and other
vehicles and, therefore, may be subject to occasional disturbances and interruptions in the satellite link.
• The WBES i
...

SLOVENSKI STANDARD
01-junij-2021
Satelitske zemeljske postaje in sistemi (SES) - Fiksne in premične širokopasovne
zemeljske postaje, ki komunicirajo z negeostacionarnimi satelitskimi sistemi
(WBES) v frekvenčnih pasovih od 11 GHz do 14 GHz - Harmonizirani standard za
dostop do radijskega spektra
Satellite Earth Stations and Systems (SES) - Fixed and in-motion Wide Band Earth
Stations communicating with non-geostationary satellite systems (WBES) in the 11 GHz
to 14 GHz frequency bands - Harmonised Standard for access to radio spectrum
Ta slovenski standard je istoveten z: ETSI EN 303 981 V1.2.1 (2021-04)
ICS:
33.060.30 Radiorelejni in fiksni satelitski Radio relay and fixed satellite
komunikacijski sistemi communications systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

HARMONISED EUROPEAN STANDARD
Satellite Earth Stations and Systems (SES);
Fixed and in-motion Wide Band Earth Stations communicating
with non-geostationary satellite systems (WBES)
in the 11 GHz to 14 GHz frequency bands;
Harmonised Standard for access to radio spectrum

2 ETSI EN 303 981 V1.2.1 (2021-04)

Reference
DEN/SES-00450
Keywords
broadband, earth station, mobile, regulation,
satellite
ETSI
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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.
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GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
3 ETSI EN 303 981 V1.2.1 (2021-04)
Contents
Intellectual Property Rights . 7
Foreword . 7
Modal verbs terminology . 7
Introduction . 8
1 Scope . 9
2 References . 10
2.1 Normative references . 10
2.2 Informative references . 10
3 Definition of terms, symbols and abbreviations . 11
3.1 Terms . 11
3.2 Symbols . 13
3.3 Abbreviations . 13
4 Technical requirements specifications . 14
4.1 General . 14
4.1.0 Target . 14
4.1.1 Environmental profile . 14
4.1.2 Operating configurations . 14
4.1.3 Presentation of equipment for testing purposes . 14
4.1.4 Choice of model for testing . 15
4.1.5 Peak pointing accuracy . 15
4.1.6 Location and Identification of the WBES . 15
4.1.7 Operation of multiple WBES on a single frequency . 15
4.2 Conformance requirements . 15
4.2.1 Antenna beam pointing . 15
4.2.1.1 Pointing accuracy . 15
4.2.1.1.1 Purpose . 15
4.2.1.1.2 Antenna Beam Pointing error . 15
4.2.1.2 Pointing error detection . 16
4.2.1.2.1 Purpose . 16
4.2.1.2.2 Pointing error detection specification . 16
4.2.1.3 Conformance tests . 16
4.2.2 Off-axis spurious radiation . 16
4.2.2.1 Justification . 16
4.2.2.2 Specification. 16
4.2.2.3 Conformance tests . 17
4.2.3 On-axis spurious radiation . 17
4.2.3.1 Justification . 17
4.2.3.2 Specification. 18
4.2.3.2.1 "Carrier-on" radio state . 18
4.2.3.2.2 "Carrier-off" and "Emissions disabled" radio states . 18
4.2.3.3 Conformance tests . 18
4.2.4 Carrier suppression . 18
4.2.4.1 Justification . 18
4.2.4.2 Specification. 18
4.2.4.3 Conformance tests . 18
4.2.5 Cessation of emissions . 19
4.2.5.1 Justification . 19
4.2.5.2 Specification. 19
4.2.5.2.1 Specification 1: Mode of cessation of emissions . 19
4.2.5.2.2 Specification 2: Conditions under which the WBES shall cease emissions . 19
4.2.5.2.3 Specification 3: Cessation of emissions . 20
4.2.5.2.4 Specification 4: Fault conditions . 20
4.2.5.3 Conformance tests . 20
4.2.6 Location and Identification of the WBES . 20
ETSI
4 ETSI EN 303 981 V1.2.1 (2021-04)
4.2.6.1 Justification . 20
4.2.6.2 Specification. 20
4.2.6.3 Conformance tests . 20
4.2.7 Control and Monitoring Functions (CMFs) . 21
4.2.7.1 General - Finite State Machine Model . 21
4.2.7.2 Processor monitoring . 23
4.2.7.2.1 Justification . 23
4.2.7.2.2 Specification . 23
4.2.7.2.3 Conformance tests . 24
4.2.7.3 Transmit subsystem monitoring . 24
4.2.7.3.1 Justification . 24
4.2.7.3.2 Specification . 24
4.2.7.3.3 Conformance tests . 24
4.2.7.4 Power-on/Reset . 24
4.2.7.4.1 Justification . 24
4.2.7.4.2 Specification . 24
4.2.7.4.3 Conformance tests . 24
4.2.7.5 Control Channel (CC) and Response Channel (RC) . 24
4.2.7.5.1 Justification . 24
4.2.7.5.2 Specification . 25
4.2.7.5.3 Conformance tests . 25
4.2.7.6 Network control commands . 25
4.2.7.6.1 Justification . 25
4.2.7.6.2 Specification . 26
4.2.7.6.3 Conformance tests . 26
4.2.7.7 Initial burst transmission . 26
4.2.7.7.1 Justification . 26
4.2.7.7.2 Specification . 26
4.2.7.7.3 Conformance tests . 26
4.2.7.8 Inhibition of transmissions . 27
4.2.7.8.1 Justification . 27
4.2.7.8.2 Specification . 27
4.2.7.8.3 Conformance tests . 27
4.2.8 Receive antenna off-axis gain pattern . 27
4.2.8.1 Justification . 27
4.2.8.2 Specification. 27
4.2.8.2.1 Class A WBES . 27
4.2.8.2.2 Class B WBES . 28
4.2.8.3 Conformance tests . 28
4.2.9 Blocking performance . 28
4.2.9.1 Justification . 28
4.2.9.2 Specification. 28
4.2.9.2.1 Class A WBES . 28
4.2.9.2.2 Class B WBES . 29
4.2.9.3 Conformance tests . 29
4.2.10 Adjacent Signal Selectivity . 29
4.2.10.1 Justification . 29
4.2.10.2 Specification. 29
4.2.10.3 Conformance tests . 29
4.2.11 Image frequency rejection . 29
4.2.11.1 Justification . 29
4.2.11.2 Specification. 29
4.2.11.3 Conformance tests . 30
5 Testing for compliance with technical requirements . 30
5.1 Environmental conditions for testing . 30
5.2 Ancillary Equipment . 30
5.3 Nominated Bandwidth . 30
6 Test methods for all aspects of the WBES . 31
6.1 General . 31
6.1.1 General requirements . 31
ETSI
5 ETSI EN 303 981 V1.2.1 (2021-04)
6.2 Off-axis spurious radiation . 31
6.2.1 General . 31
6.2.2 Test method . 31
6.2.2.1 General . 31
6.2.2.2 Multi-carrier operation . 32
6.2.3 Measurements up to 1 000 MHz . 32
6.2.3.1 Test site . 32
6.2.3.2 Procedure . 32
6.2.4 Measurements above 1 000 MHz . 33
6.2.4.1 General . 33
6.2.4.2 Identification of the significant frequencies of spurious radiation . 33
6.2.4.2.1 Test site. 33
6.2.4.2.2 Procedure . 33
6.2.4.3 Measurement of radiated power levels of identified spurious radiation . 33
6.2.4.3.1 Test site. 33
6.2.4.3.2 Procedure . 34
6.2.4.4 Measurement of conducted spurious radiation at the antenna flange . 35
6.2.4.4.1 Test site. 35
6.2.4.4.2 Procedure . 35
6.3 On-axis spurious radiation . 36
6.3.1 Test method . 36
6.3.1.1 General . 36
6.3.1.2 Test site . 36
6.3.1.3 Method of measurement . 36
6.3.1.3.1 General . 36
6.3.1.3.2 Method of measurement at the antenna flange . 36
6.3.1.3.3 Method of measurement for an EUT with antenna . 38
6.4 Carrier suppression . 39
6.4.1 General . 39
6.4.2 Test method . 39
6.5 Antenna beam pointing . 39
6.5.1 General . 39
6.5.2 Test methods . 40
6.6 Cessation of emissions of the WBES . 41
6.6.1 General . 41
6.6.2 Test Method . 41
6.6.2.1 Required documentation . 41
6.6.2.2 Cessation of emissions from the "Transmission enabled" state . 41
6.6.2.3 Cessation of emission from the "Transmission disabled" state . 41
6.6.2.4 Cessation of emission from the "Initial Phase" state . 42
6.6.2.4.1 EUTs transmitting initial bursts . 42
6.6.2.4.2 EUTs not transmitting initial bursts . 42
6.6.2.5 "Single action" means of cessation of emissions. 42
6.6.2.6 Fault conditions . 43
6.7 Location and Identification of WBES . 43
6.7.1 Test arrangement . 43
6.7.2 Test method . 43
6.8 Control and monitoring functions . 44
6.8.1 General . 44
6.8.2 Test arrangement . 44
6.8.3 Processor monitoring- Test method . 44
6.8.4 Transmit subsystem monitoring-Test method . 44
6.8.5 Power-on/Reset-Test method . 44
6.8.6 Control Channel and Response Channel -Test method . 45
6.8.7 Network Control commands-Test method . 46
6.8.8 Initial burst transmission-Test method . 47
6.8.9 Inhibition of transmission-Test method . 47
6.9 Antenna off-axis gain pattern . 47
6.9.1 Test Method . 47
6.9.1.1 Test site . 47
6.9.1.2 Method of measurement for EUT antenna with linear polarization . 48
6.9.1.3 Method of measurement for antennas with circular polarization . 48
ETSI
6 ETSI EN 303 981 V1.2.1 (2021-04)
6.10 Blocking performance . 49
6.10.1 Test method - Class A/B WBES . 49
6.11 Adjacent Signal Selectivity . 49
6.11.1 Test method . 49
Annex A (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 51
Annex B (normative): Radiated measurement . 53
B.1 General . 53
B.2 Free Field Test sites and general arrangements for measurements involving the use of radiated
fields . 53
B.2.1 Anechoic Chamber . 53
B.2.2 Anechoic Chamber with a conductive ground plane . 54
B.2.3 Open Area Test Site (OATS) . 56
B.2.4 Minimum requirements for free field test sites. 57
B.2.4.1 Measurements above 18 GHz . 57
B.2.4.2 Test antenna . 57
B.2.4.3 Substitution antenna . 58
B.2.4.4 Measuring antenna . 58
B.2.5 Guidance on the use of free field radiation test sites . 58
B.2.5.1 General . 58
B.2.5.2 Verification of the test site . 58
B.2.5.3 Preparation of the EUT . 58
B.2.5.4 Power supplies to the EUT . 58
B.2.5.5 Range length . 59
B.2.5.6 Site preparation . 59
B.2.5.7 Coupling of signals . 60
B.2.5.8 Standard test methods . 60
B.2.5.8.0 General . 60
B.2.5.8.1 Calibrated setup . 60
B.2.5.8.2 Substitution method . 60
B.3 Guidance on the use of indirect far field test sites . 62
B.3.1 General . 62
B.3.2 Far-field criteria . 63
B.3.3 Calibration Measurement Procedure . 63
B.4 Guidance on the use of near-field-to-far-field transform test sites . 64
B.4.1 General . 64
B.4.2 Calibration Measurement Procedure . 65
Annex C (normative): Conducted measurements . 67
Annex D (informative): General Requirements for RF Cables . 68
Annex E (informative): RF Waveguides . 69
Annex F (informative): Measurement Equipment . 70
F.1 Special considerations for the interpretation of measurement results . 70
F.2 Maximum measurement uncertainty . 70
F.3 Measuring receiver . 71
Annex G (informative): Applicability of parameters given in ETSI EG 203 336 . 73
Annex H (informative): Bibliography . 75
Annex I (informative): Change history . 76
History . 77

ETSI
7 ETSI EN 303 981 V1.2.1 (2021-04)
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 Satellite Earth Stations
and Systems (SES).
The present document has been prepared under the Commission's standardisation request C(2015) 5376 final [i.1] 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.7].
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: 6 April 2021
Date of latest announcement of this EN (doa): 31 July 2021
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 January 2022
Date of withdrawal of any conflicting National Standard (dow): 31 January 2023

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
8 ETSI EN 303 981 V1.2.1 (2021-04)
Introduction
The present document is part of a set of standards developed by ETSI and is designed to fit in a modular structure to
cover all radio and telecommunications terminal equipment within the scope of the RE Directive [i.7]. The modular
structure is shown in ETSI EG 201 399 [i.2].
The present document is largely based on ETSI EN 303 979 [i.4], for ESOMPs operating with NGSO satellites, and
ETSI EN 303 980 [i.5] for NEST operating with NGSO satellites.
The present document may also be applicable to the frequency band 14,0 GHz to 14,50 GHz (Earth-to-space) and
10,70 GHz to 12,75 GHz (space-to-Earth) subject to national regulation.
Annex A (informative) provides the relationship between the present document and the essential requirements of
Directive 2014/53/EU [i.7].
Annex B (normative) describes methods of taking radiated measurements.
Annex C (normative) describes methods of taking conducted measurements.
Annex D (informative) describes requirements for RF measurement cables.
Annex E (informative) describes use of RF waveguides.
Annex F (informative) describes measurement equipment.
Annex G (informative) describes the applicability of parameters in ETSI EG 203 336 [i.8].
Annex H (informative) is the Bibliography.
Annex I (informative) is the Change history.
Recital 10 of Directive 2014/53/EU [i.7] states that "in order to ensure that radio equipment uses the radio spectrum
effectively and supports the efficient use of radio spectrum, radio equipment should be constructed so that: in the case
of a transmitter, when the transmitter is properly installed, maintained and used for its intended purpose it generates
radio waves emissions that do not create harmful interference, while unwanted radio waves emissions generated by the
transmitter (e.g. in adjacent channels) with a potential negative impact on the goals of radio spectrum policy should be
limited to such a level that, according to the state of the art, harmful interference is avoided; and, in the case of a
receiver, it has a level of performance that allows it to operate as intended and protects it against the risk of harmful
interference, in particular from shared or adjacent channels, and, in so doing, supports improvements in the efficient
use of shared or adjacent channels".
Recital 11 of Directive 2014/53/EU [i.7] states that "although receivers do not themselves cause harmful interference,
reception cap
...