SIST EN 301 721 V2.1.1:2016

ETSI EN 301 721 V2.1.1 (2016-05)






HARMONISED EUROPEAN STANDARD
Satellite Earth Stations and Systems (SES);
Harmonised Standard for Mobile Earth Stations (MES)
providing Low Bit Rate Data Communications (LBRDC)
using Low Earth Orbiting (LEO) satellites operating
below 1 GHz frequency band covering the essential
requirements of article 3.2 of the Directive 2014/53/EU

---------------------- Page: 1 ----------------------
2 ETSI EN 301 721 V2.1.1 (2016-05)



Reference
REN/SES-00391
Keywords
earth station, LEO, MES, mobile, MSS,
regulation, satellite
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 only prevailing document is the
print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat.
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.

© European Telecommunications Standards Institute 2016.
All rights reserved.

TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI

---------------------- Page: 2 ----------------------
3 ETSI EN 301 721 V2.1.1 (2016-05)
Contents
Intellectual Property Rights . 6
Foreword . 6
Modal verbs terminology . 6
Introduction . 6
1 Scope . 8
2 References . 8
2.1 Normative references . 8
2.2 Informative references . 9
3 Definitions and abbreviations . 9
3.1 Definitions . 9
3.2 Abbreviations . 10
4 Technical requirements specifications . 11
4.1 Environmental profile . 11
4.1.1 General . 11
4.1.2 Temperature . 11
4.1.3 Voltage . 11
4.1.4 Vibration . 12
4.2 Conformance requirements . 12
4.2.1 Unwanted emission outside the bands 148 MHz to 150,05 MHz, 235 MHz to 322 MHz, 335,4 MHz
to 399,9 MHz and 399,9 MHz to 400,05 MHz . 12
4.2.1.1 Justification . 12
4.2.1.2 Technical requirements . 12
4.2.1.3 Conformance test . 13
4.2.1.4 Test Condition . 14
4.2.1.5 Test requirements . 14
4.2.2 Unwanted emission within the bands 148 MHz to 150,05 MHz, 235 MHz to 322 MHz, 335,4 MHz
to 399,9 MHz and 399,9 MHz to 400,05 MHz . 15
4.2.2.1 Justification . 15
4.2.2.2 Technical requirements . 15
4.2.2.3 Conformance test . 15
4.2.2.4 Test condition . 16
4.2.2.5 Test requirements . 16
4.2.3 EIRP density within the operational band. 16
4.2.3.1 Justification . 16
4.2.3.2 Technical requirements . 16
4.2.3.3 Conformance test . 17
4.2.3.4 Test condition . 17
4.2.3.5 Test requirements . 17
4.2.4 Unwanted emissions in carrier-off state . 17
4.2.4.1 Justification . 17
4.2.4.2 Technical requirements . 18
4.2.4.3 Conformance test . 18
4.2.4.4 Test condition . 18
4.2.4.5 Test requirements . 18
4.2.5 MES Control and Monitoring Functions (CMF) . 18
4.2.5.1 Justification . 18
4.2.5.2 Special Test Equipment (STE) . 19
4.2.5.3 Technical requirements . 19
4.2.5.3.1 Self-monitoring functions . 19
4.2.5.3.2 Network control authorization and reception - Network control authorization . 19
4.2.5.3.3 Network control authorization and reception - Network control reception . 20
4.2.5.3.4 Transmit frequency control . 21
4.2.6 Equipment identity . 22
4.2.6.1 Justification . 22
ETSI

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4 ETSI EN 301 721 V2.1.1 (2016-05)
4.2.6.2 Technical requirements . 22
4.2.6.3 Conformance test . 22
4.2.6.4 Test procedure . 22
4.2.6.5 Test requirements . 22
4.2.7 Protection of the Radio Astronomy Service (RAS) from emissions produced by the MES in the
bands 150,05 MHz to 153 MHz, 322 MHz to 328,6 MHz and 406,1 MHz to 410 MHz . 23
4.2.7.1 Justification . 23
4.2.7.2 Technical requirements . 23
4.2.7.3 Conformance test . 23
4.2.7.4 Test procedure . 23
4.2.7.5 Test requirement . 23
4.2.8 Receiver Performance Requirements . 23
4.2.8.1 General . 23
4.2.8.2 Receiver Adjacent Channel Selectivity . 23
4.2.8.2.1 Justification . 23
4.2.8.2.2 Technical requirements. 23
4.2.8.2.3 Conformance test . 23
4.2.8.2.4 Test procedure . 24
4.2.8.3 Receiver Blocking Characteristics . 24
4.2.8.3.1 Justification . 24
4.2.8.3.2 Technical requirements. 24
4.2.8.3.3 Conformance test . 24
4.2.8.3.4 Test procedure . 24
5 Testing for compliance with technical requirements . 24
5.1 Environmental conditions for testing . 24
5.1.1 General . 24
5.1.2 Specification of the environmental test conditions . 24
5.1.3 Tests under extreme voltage conditions . 25
5.2 Essential radio test suites . 25
5.2.1 Presentation of equipment for testing purposes . 25
5.2.2 Description of equipment . 25
5.2.3 Host-connected equipment . 26
5.2.4 General test requirements . 26
5.2.4.1 MES test modes . 26
5.2.4.2 Special Test Equipment (STE) . 26
5.2.4.2.1 STE description . 26
5.2.4.2.2 Use of STE for control and monitoring functions tests . 27
5.2.4.2.3 Test modulating signal . 27
5.2.4.3 Laboratory Test Equipment (LTE) . 27
5.2.4.4 Methods of test for MES RF emissions. 28
5.2.4.5 Interpretation of the measurement results . 28
5.2.4.6 Test report . 28
5.2.5 Testing of host-connected equipment and plug-in modules . 28
5.2.5.1 Alternative approaches . 28
5.2.5.2 Alternative A: combined equipment . 28
5.2.5.3 Alternative B: use of a test jig . 28
5.2.6 Procedures for measurement of radiated emissions . 29
5.2.6.1 General . 29
5.2.6.2 Test site . 29
5.2.6.3 Test set up for radiated emissions of the MES . 29
5.2.6.4 Reference position of the MES . 30
5.2.6.5 Measurement procedure for radiated emissions (average) . 30
5.2.6.5.1 Measurement procedure for average radiated emissions of the MES . 30
5.2.6.5.2 Measurement procedure for average radiated emissions of the cabinet . 32
5.2.7 Procedures for measurement of conducted emissions . 32
5.2.7.1 General . 32
5.2.7.2 Test site . 32
5.2.7.3 Test set-up . 33
5.2.7.4 Measurement procedure for conducted emissions (average). 33
5.2.8 Receiver Adjacent Channel Selectivity. 33
5.2.8.1 General . 33
ETSI

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5 ETSI EN 301 721 V2.1.1 (2016-05)
5.2.8.2 Test set-up . 34
5.2.8.3 Measurement procedure . 34
5.2.9 Receiver Blocking Characteristics . 34
5.2.9.1 General . 34
5.2.9.2 Test set-up . 34
5.2.9.3 Measurement procedure . 34
Annex A (normative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 36
Annex B (informative): Bibliography . 38
History . 39

ETSI

---------------------- Page: 5 ----------------------
6 ETSI EN 301 721 V2.1.1 (2016-05)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (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.
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.2] 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 [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: 12 May 2016
Date of latest announcement of this EN (doa): 31 August 2016
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 28 February 2017
Date of withdrawal of any conflicting National Standard (dow): 28 February 2018

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Introduction
ETSI has designed a modular structure for the standards. Each standard is a module in the structure. The modular
structure is shown in ETSI EG 201 399 [i.1].
Figure 1: Void
The present document is based on ETSI EN 300 721 [6].
The requirements of the present document have been selected to ensure an adequate level of compatibility with other
radio services.
ETSI

---------------------- Page: 6 ----------------------
7 ETSI EN 301 721 V2.1.1 (2016-05)
The present document does not contain any requirement, recommendation, or information about the installation of the
MESs.
The determination of the parameters of the user earth stations using a given satellite constellation for the protection of
the spectrum allocated to that satellite constellation, is considered to be under the responsibility of the satellite operator
or the satellite network operators.
ETSI

---------------------- Page: 7 ----------------------
8 ETSI EN 301 721 V2.1.1 (2016-05)
1 Scope
The present document applies to Mobile Earth Stations (MES) providing Low Bit Rate Data Communications
(LBRDC) using Low Earth Orbiting (LEO) satellites and which have the following characteristics:
- the MES could be a Based MES (BMES), a Vehicle mounted MES (VMES), or a Portable MES (PMES);
- the MESs operate through satellites in Low Earth Orbit (LEO) as part of a network providing Low Bit Rate
Data Communications (LBRDC);
- these radio equipment types are capable of operating in all or any part of the frequency bands given in table 1.
Table 1: Frequency ranges
MES Transmit frequencies and Service allocations MES Receive frequencies and Service allocations
(MHz) (MHz)
148 to 149,9 MSS 137 to 137,025 MSS
149,9 to 150,05 LMSS 137,025 to 137,175 MSS
235 to 322 MSS 137,175 to 137,825 MSS
335,4 to 399,9 MSS 137,825 to 138 MSS
399,9 to 400,05 LMSS 235 to 322 MSS
 335,4 to 399,9 MSS
 400,15 to 401 MSS

The present document is intended to cover the provisions of Directive 2014/53/EU [7] (RE Directive) article 3.2 which
states that "….radio equipment shall be so constructed that it both effectively uses and supports the efficient use of
radio spectrum in order to avoid harmful interference".
In addition to the present document, other ENs that specify technical requirements in respect of essential requirements
under other parts of article 3 of the RE Directive [7] may apply to equipment within the scope of the present document.
NOTE 1: A list of such ENs is included on the ETSI web site.
NOTE 2: The MESs are controlled and monitored by a Network Control Facility (NCF). The NCF is outside the
scope of the present document.
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
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] Void.
[2] IEC Publication 60068-2-1 (2007): "Environmental testing - Part 2: Tests. Tests A: Cold".
[3] IEC Publication 60068-2-2 (2007): "Environmental testing - Part 2: Tests. Tests B: Dry heat".
[4] IEC Publication 60068-2-64 (2008): "Environmental testing - Part 2-64: Tests - Test Fh: Vibration,
broadband random and guidance".
[5] Void.
ETSI

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9 ETSI EN 301 721 V2.1.1 (2016-05)
[6] ETSI EN 300 721 (V1.2.2) (07-1999): "Satellite Earth Stations and Systems (SES); Mobile Earth
Stations (MES) providing Low Bit Rate Data Communications (LBRDC) using Low Earth
Orbiting (LEO) satellites operating below 1 GHz".
[7] 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.
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI EG 201 399 (V3.1.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
A guide to the production of Harmonized Standards for application under the Radio &
Telecommunication Terminal Equipment Directive 1999/5/EC (R&TTE) and a first guide on the
impact of the Radio Equipment Directive 2014/53/EU (RED) on H
...

Draft ETSI EN 301 721 V2.1.0 (2016-02)






HARMONISED EUROPEAN STANDARD
Satellite Earth Stations and Systems (SES);
Harmonised Standard for Mobile Earth Stations (MES)
providing Low Bit Rate Data Communications (LBRDC)
using Low Earth Orbiting (LEO) satellites
operating below 1 GHz frequency band covering the essential
requirements of article 3.2 of the Directive 2014/53/EU

---------------------- Page: 1 ----------------------
2 Draft ETSI EN 301 721 V2.1.0 (2016-02)



Reference
REN/SES-00391
Keywords
earth station, LEO, MES, mobile, MSS,
regulation, satellite
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 only prevailing document is the
print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat.
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.

© European Telecommunications Standards Institute 2016.
All rights reserved.

TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI

---------------------- Page: 2 ----------------------
3 Draft ETSI EN 301 721 V2.1.0 (2016-02)
Contents
Intellectual Property Rights . 6
Foreword . 6
Modal verbs terminology . 6
Introduction . 6
1 Scope . 8
2 References . 8
2.1 Normative references . 8
2.2 Informative references . 9
3 Definitions and abbreviations . 9
3.1 Definitions . 9
3.2 Abbreviations . 10
4 Technical requirements specifications . 11
4.1 Environmental profile . 11
4.1.1 General . 11
4.1.2 Temperature . 11
4.1.3 Voltage . 11
4.1.4 Vibration . 12
4.2 Conformance requirements . 12
4.2.1 Unwanted emission outside the bands 148 MHz to 150,05 MHz, 235 MHz to 322 MHz, 335,4 MHz
to 399,9 MHz and 399,9 MHz to 400,05 MHz . 12
4.2.1.1 Justification . 12
4.2.1.2 Technical requirements . 12
4.2.1.3 Conformance test . 13
4.2.1.4 Test Condition . 14
4.2.1.5 Test requirements . 14
4.2.2 Unwanted emission within the bands 148 MHz to 150,05 MHz, 235 MHz to 322 MHz, 335,4 MHz
to 399,9 MHz and 399,9 MHz to 400,05 MHz . 15
4.2.2.1 Justification . 15
4.2.2.2 Technical requirements . 15
4.2.2.3 Conformance test . 15
4.2.2.4 Test condition . 16
4.2.2.5 Test requirements . 16
4.2.3 EIRP density within the operational band. 16
4.2.3.1 Justification . 16
4.2.3.2 Technical requirements . 16
4.2.3.3 Conformance test . 17
4.2.3.4 Test condition . 17
4.2.3.5 Test requirements . 17
4.2.4 Unwanted emissions in carrier-off state . 17
4.2.4.1 Justification . 17
4.2.4.2 Technical requirements . 18
4.2.4.3 Conformance test . 18
4.2.4.4 Test condition . 18
4.2.4.5 Test requirements . 18
4.2.5 MES Control and Monitoring Functions (CMF) . 18
4.2.5.1 Justification . 18
4.2.5.2 Special Test Equipment (STE) . 19
4.2.5.3 Technical requirements . 19
4.2.5.3.1 Self-monitoring functions . 19
4.2.5.3.2 Network control authorization and reception - Network control authorization . 19
4.2.5.3.3 Network control authorization and reception - Network control reception . 20
4.2.5.3.4 Transmit frequency control . 21
4.2.6 Equipment identity . 22
4.2.6.1 Justification . 22
ETSI

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4 Draft ETSI EN 301 721 V2.1.0 (2016-02)
4.2.6.2 Technical requirements . 22
4.2.6.3 Conformance test . 22
4.2.6.4 Test procedure . 22
4.2.6.5 Test requirements . 22
4.2.7 Protection of the Radio Astronomy Service (RAS) from emissions produced by the MES in the
bands 150,05 MHz to 153 MHz, 322 MHz to 328,6 MHz and 406,1 MHz to 410 MHz . 23
4.2.7.1 Justification . 23
4.2.7.2 Technical requirements . 23
4.2.7.3 Conformance test . 23
4.2.7.4 Test procedure . 23
4.2.7.5 Test requirement . 23
4.2.8 Receiver Performance Requirements . 23
4.2.8.1 General . 23
4.2.8.2 Receiver Adjacent Channel Selectivity . 23
4.2.8.2.1 Justification . 23
4.2.8.2.2 Technical requirements. 23
4.2.8.2.3 Conformance test . 23
4.2.8.2.4 Test procedure . 24
4.2.8.3 Receiver Blocking Characteristics . 24
4.2.8.3.1 Justification . 24
4.2.8.3.2 Technical requirements. 24
4.2.8.3.3 Conformance test . 24
4.2.8.3.4 Test procedure . 24
5 Testing for compliance with technical requirements . 24
5.1 Environmental conditions for testing . 24
5.1.1 General . 24
5.1.2 Specification of the environmental test conditions . 24
5.1.3 Tests under extreme voltage conditions . 25
5.2 Essential radio test suites . 25
5.2.1 Presentation of equipment for testing purposes . 25
5.2.2 Description of equipment . 25
5.2.3 Host-connected equipment . 26
5.2.4 General test requirements . 26
5.2.4.1 MES test modes . 26
5.2.4.2 Special Test Equipment (STE) . 26
5.2.4.2.1 STE description . 26
5.2.4.2.2 Use of STE for control and monitoring functions tests . 27
5.2.4.2.3 Test modulating signal . 27
5.2.4.3 Laboratory Test Equipment (LTE) . 27
5.2.4.4 Methods of test for MES RF emissions. 28
5.2.4.5 Interpretation of the measurement results . 28
5.2.4.6 Test report . 28
5.2.5 Testing of host-connected equipment and plug-in modules . 28
5.2.5.1 Alternative approaches . 28
5.2.5.2 Alternative A: combined equipment . 28
5.2.5.3 Alternative B: use of a test jig . 28
5.2.6 Procedures for measurement of radiated emissions . 29
5.2.6.1 General . 29
5.2.6.2 Test site . 29
5.2.6.3 Test set up for radiated emissions of the MES . 29
5.2.6.4 Reference position of the MES . 30
5.2.6.5 Measurement procedure for radiated emissions (average) . 30
5.2.6.5.1 Measurement procedure for average radiated emissions of the MES . 30
5.2.6.5.2 Measurement procedure for average radiated emissions of the cabinet . 32
5.2.7 Procedures for measurement of conducted emissions . 32
5.2.7.1 General . 32
5.2.7.2 Test site . 32
5.2.7.3 Test set-up . 33
5.2.7.4 Measurement procedure for conducted emissions (average). 33
5.2.8 Receiver Adjacent Channel Selectivity. 33
5.2.8.1 General . 33
ETSI

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5 Draft ETSI EN 301 721 V2.1.0 (2016-02)
5.2.8.2 Test set-up . 34
5.2.8.3 Measurement procedure . 34
5.2.9 Receiver Blocking Characteristics . 34
5.2.9.1 General . 34
5.2.9.2 Test set-up . 34
5.2.9.3 Measurement procedure . 34
Annex A (normative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 36
Annex B (informative): Bibliography . 38
History . 39

ETSI

---------------------- Page: 5 ----------------------
6 Draft ETSI EN 301 721 V2.1.0 (2016-02)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (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.
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.2] 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 [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.
Introduction
ETSI has designed a modular structure for the standards. Each standard is a module in the structure. The modular
structure is shown in ETSI EG 201 399 [i.1].
Figure 1: Void
The present document is based on ETSI EN 300 721 [6].
The requirements of the present document have been selected to ensure an adequate level of compatibility with other
radio services.
ETSI

---------------------- Page: 6 ----------------------
7 Draft ETSI EN 301 721 V2.1.0 (2016-02)
The present document does not contain any requirement, recommendation, or information about the installation of the
MESs.
The determination of the parameters of the user earth stations using a given satellite constellation for the protection of
the spectrum allocated to that satellite constellation, is considered to be under the responsibility of the satellite operator
or the satellite network operators.
ETSI

---------------------- Page: 7 ----------------------
8 Draft ETSI EN 301 721 V2.1.0 (2016-02)
1 Scope
The present document applies to Mobile Earth Stations (MES) providing Low Bit Rate Data Communications
(LBRDC) using Low Earth Orbiting (LEO) satellites and which have the following characteristics:
- the MES could be a Based MES (BMES), a Vehicle mounted MES (VMES), or a Portable MES (PMES);
- the MESs operate through satellites in Low Earth Orbit (LEO) as part of a network providing Low Bit Rate
Data Communications (LBRDC);
- these radio equipment types are capable of operating in all or any part of the frequency bands given in table 1.
Table 1: Frequency ranges
MES Transmit frequencies and Service allocations MES Receive frequencies and Service allocations
(MHz) (MHz)
148 to 149,9 MSS 137 to 137,025 MSS
149,9 to 150,05 LMSS 137,025 to 137,175 MSS
235 to 322 MSS 137,175 to 137,825 MSS
335,4 to 399,9 MSS 137,825 to 138 MSS
399,9 to 400,05 LMSS 235 to 322 MSS
 335,4 to 399,9 MSS
 400,15 to 401 MSS

The present document is intended to cover the provisions of Directive 2014/53/EU [7] (RE Directive) article 3.2 which
states that "….radio equipment shall be so constructed that it both effectively uses and supports the efficient use of
radio spectrum in order to avoid harmful interference".
In addition to the present document, other ENs that specify technical requirements in respect of essential requirements
under other parts of article 3 of the RE Directive [7] may apply to equipment within the scope of the present document.
NOTE 1: A list of such ENs is included on the ETSI web site.
NOTE 2: The MESs are controlled and monitored by a Network Control Facility (NCF). The NCF is outside the
scope of the present document.
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
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] Void.
[2] IEC Publication 60068-2-1 (2007): "Environmental testing - Part 2: Tests. Tests A: Cold".
[3] IEC Publication 60068-2-2 (2007): "Environmental testing - Part 2: Tests. Tests B: Dry heat".
[4] IEC Publication 60068-2-64 (2008): "Environmental testing - Part 2-64: Tests - Test Fh: Vibration,
broadband random and guidance".
[5] Void.
ETSI

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9 Draft ETSI EN 301 721 V2.1.0 (2016-02)
[6] ETSI EN 300 721 (V1.2.2) (07-1999): "Satellite Earth Stations and Systems (SES); Mobile Earth
Stations (MES) providing Low Bit Rate Data Communications (LBRDC) using Low Earth
Orbiting (LEO) satellites operating below 1 GHz".
[7] 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.
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI EG 201 399 (V3.1.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
A guide to the production of Harmonized Standards for application under th
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