ETSI EN 301 721 V2.2.0 (2026-07)

• Abstract:

  REN/SES-00434

• Status: Not Published
• Technical Committee: SES HARM - SES WG on R&TTE dir. 99/5/EC and and RED dir. 2014/53/EU
• Current Stage: 9 - TB approval
• Due Date: 05-Oct-2026
• Ref Project: oSIST prEN 301 721 V2.2.0:2026 - 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 frequency band - Harmonised Standard for access to radio spectrum

Draft ETSI EN 301 721 V2.2.0 (2026-07)

HARMONISED EUROPEAN STANDARD
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 frequency band
Harmonised Standard for access to radio spectrum

2 Draft ETSI EN 301 721 V2.2.0 (2026-07)

Reference
REN/SES-00434
Keywords
earth station, LEO, MES, mobile, MSS, regulation,
satellite
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ETSI
3 Draft ETSI EN 301 721 V2.2.0 (2026-07)
Contents
Intellectual Property Rights . 6
Foreword . 6
Modal verbs terminology . 6
Introduction . 7
1 Scope . 8
2 References . 8
2.1 Normative references . 8
2.2 Informative references . 9
3 Definition of terms, symbols and abbreviations . 9
3.1 Terms . 9
3.2 Symbols . 11
3.3 Abbreviations . 11
4 Technical requirements specifications . 12
4.1 Environmental profile . 12
4.1.1 General . 12
4.1.2 Temperature . 12
4.1.3 Voltage . 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 . 13
4.2.1.3 Requirements for conformance test . 14
4.2.1.4 Requirements for test conditions . 14
4.2.1.5 Requirements for tests . 15
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 Requirements for conformance test . 16
4.2.2.4 Requirements for test conditions . 16
4.2.2.5 Requirements for tests . 17
4.2.3 EIRP density within the operational band. 17
4.2.3.1 Justification . 17
4.2.3.2 Technical requirements . 17
4.2.3.3 Requirements for conformance test . 17
4.2.3.4 Test conditions . 18
4.2.3.5 Requirements for tests . 18
4.2.4 Unwanted emissions in carrier-off state . 18
4.2.4.1 Justification . 18
4.2.4.2 Technical requirements . 18
4.2.4.3 Requirements for conformance test . 18
4.2.4.4 Requirements for test conditions . 19
4.2.4.5 Requirements for tests . 19
4.2.5 MES Control and Monitoring Functions (CMF) . 19
4.2.5.1 Justification . 19
4.2.5.2 Special Test Equipment (STE) . 19
4.2.5.3 Technical requirements . 19
4.2.5.3.1 Void . 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
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4 Draft ETSI EN 301 721 V2.2.0 (2026-07)
4.2.6.2 Technical requirements . 22
4.2.6.3 Requirements for conformance test . 22
4.2.6.4 Requirements for test procedure . 22
4.2.6.5 Requirements for tests . 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 Requirements for 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 Requirements for conformance test . 24
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 Requirements for 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 . 25
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) . 27
5.2.4.2.1 STE description . 27
5.2.4.2.2 Use of STE for control and monitoring functions tests . 27
5.2.4.2.3 Test modulating signal . 28
5.2.4.3 Laboratory Test Equipment (LTE) . 28
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 Test set up arrangements . 28
5.2.5.2 Set up for combined equipment . 28
5.2.5.3 Set up for the use of a test jig . 29
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
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5 Draft ETSI EN 301 721 V2.2.0 (2026-07)
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 (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 36
Annex B (informative): Maximum measurement uncertainty . 39
Annex C (informative): Vibration . 40
Annex D (informative): Bibliography . 41
Annex E (informative): Change history . 42
History . 43

ETSI
6 Draft ETSI EN 301 721 V2.2.0 (2026-07)
Intellectual Property Rights
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ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
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Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
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essential to the present document.
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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
Standardisation Request deliverable Approval Procedure (SRdAP).
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 [i.3].
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).
ETSI
7 Draft ETSI EN 301 721 V2.2.0 (2026-07)
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Introduction
The present document is based on ETSI EN 300 721 [i.5].
The present document does not contain any requirement, recommendation, or information about the installation of the
MESs.
ETSI
8 Draft ETSI EN 301 721 V2.2.0 (2026-07)
1 Scope
The present document specifies technical characteristics and methods of measurements for Mobile Earth Stations
(MES) providing Low Bit Rate Data Communications (LBRDC) using Low Earth Orbit (LEO) satellites and which
have the following characteristics:
- the MES as covered by the present document are 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 are designed to operate in all or any part of the frequency bands given in table 1.
- The MESs have to be part of a satellite network and controlled and monitored by a Network Control Facility
(NCF). The specification of the NCF is outside the scope of the present document.
Table 1: Frequency ranges in Transmit and Receive frequencies
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 MSS 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 MSS 235 to 322 MSS
335,4 to 399,9 MSS
400,15 to 401 MSS
NOTE 1: The acronyms "MSS" and "mss" refer to mobile satellite service (See list of abbreviations). Capital letters
"MSS" refer to Primary MSS service. Lower case "mss" refers to secondary MSS service.
The present document is intended to cover the provisions of article 3.2 of Directive 2014/53/EU [i.3] (RE Directive).
NOTE 2: The relationship between the present document and essential requirements of article 3.2 of the Directive
2014/53 [i.3] is given in Annex A.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found in the
ETSI docbox.
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 (2025): "Environmental testing - Part 2: Tests. Tests A: Cold".
[3] IEC Publication 60068-2-2 (2025): "Environmental testing - Part 2: Tests. Tests B: Dry heat".
[4] Void.
ETSI
9 Draft ETSI EN 301 721 V2.2.0 (2026-07)
[5] Void.
[6] CISPR 16-1-5:2014+AMD1:2016 CSV: "Specification for radio disturbance and immunity
measuring apparatus and methods - Part 1-5: Radio disturbance and immunity measuring
apparatus - Antenna calibration sites and reference test sites for 5 MHz to 18 GHz".
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 may be useful in implementing an ETSI deliverable or add to the reader's
understanding, but are not required for conformance to the present document.
[i.1] Void.
[i.2] Commission Implementing Decision C(2015) 5376 of 4.8.2015 on a standardisation request to the
European Committee for Electrotechnical Standardisation and to the European
Telecommunications Standards Institute as regards radio equipment in support of Directive
2014/53/EU of the European Parliament and of the Council.
[i.3] Directive 2014/53/EU of the European Parliament and of the Council of 16 April 2014 on the
harmonisation of the laws of the Member States relating to the making available on the market of
radio equipment and repealing Directive 1999/5/EC.
[i.4] Recommendation ITU-R M.1039-1: Co-frequency sharing between stations in the mobile service
below 1 GHz and FDMA non-geostationary-satellite orbit (non-GSO) mobile earth stations.
[i.5] ETSI EN 300 721 (V2.1.1) (2016): "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".
[i.6] IEC 60068-2-64:2008+AMD1:2019 CSV: "Environmental testing - Part 2-64: Tests - Test Fh:
Vibration, broadband random and guidance".
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
BMES (Based MES): MES intended to be installed in a fixed location, and which is powered either by DC or AC
power supply
carrier-off state: radio state in which the MES does not actually transmit a carrier
carrier-on state: state in which the MES is transmitting a carrier
conducted measurement: measurement of emissions from an antenna port of the MES made by direct wired
connection to the port
control channel: channel used to transmit a signal from the satellite containing control information used to command
the MES either to enable or disable its transmission
environmental profile: range of environmental conditions under which equipment within the scope of the present
document is required to comply with the provisions of the present document
ETSI
10 Draft ETSI EN 301 721 V2.2.0 (2026-07)
Equivalent Isotropically Radiated Power (EIRP): product of transmitter power and antenna gain, equivalent to an
isotropic source radiating uniformly in all directions
host-connected: MES for which connection to or integration with host equipment is necessary to provide functionality
host equipment: equipment which has a complete user functionality when not connected to the MES, and to which the
MES provides additional functionality, and to which connection is necessary for the MES to provide functionality
in-band signals: signals which are located in the occupied bandwidth
Installable Equipment (IE), Internally Mounted Equipment (IME) And Externally Mounted Equipment (EME):
equipment which is intended to be installed either internally or externally to the MES (usually in a vehicle)
NOTE: An IE consists of one or several interconnected modules. The IE is composed of modules intended to be
externally mounted as defined for the intended use of the MES and defined as Externally Mounted
Equipment (EME) and the remaining modules(s) as Internally Mounted Equipment (IME).
Laboratory Test Equipment (LTE): logical grouping that contains the standard test equipment
Low bit rate data communications: in the present document, bit rates up to 15 kbps
MSS band: continuous range of frequencies allocated by the ITU to the MSS (Mobile Satellite Service)
narrow-band system: a system in which the nominal carrier frequency spacing for MESs in the Earth-to-space
direction is less than 300 kHz
NCF control message: message, normally originating from a network, to a specified terminal or set of terminals of the
network which indicates to the terminal or set of terminals that it/they should carry out some specific action or should
enter or maintain some specific state
NOTE: For test purposes NCF control messages may originate from Special Test Equipment (STE).
network control channel: channel by which an MES receives general control information from the NCF
nominated bandwidth: bandwidth of the MES radio frequency transmission nominated for the intended use of the
MES and which meets the following conditions of notes 1 and 2 below.
NOTE 1: The nominated bandwidth is wide enough to encompass all spectral elements of the transmission which
have a level greater than the specified unwanted emissions limits. The nominated bandwidth is also wide
enough to take account of the transmit carrier frequency stability. This definition is chosen to allow
flexibility regarding adjacent channel interference levels which will be taken into account by operational
procedures depending on the exact transponder carrier assignment situation.The nominated bandwidth is
within the MSS transmit frequency band within which the MES operates.
NOTE 2: For FDMA/DCAA [i.4] systems with a bit rate up to 2,4 kbps the Nominated Bandwidth does not exceed
25 kHz. For FDMA/DCAA systems with a bit rate up above 2,4 kbps the Nominated Bandwidth does not
exceed 50 kHz.
occupied Bandwidth: for a digital modulation scheme - the width of the signal spectrum 10 dB below the maximum
inband density
Portable MES (PMES): MES intended to be portable, and powered by a stand alone battery, and generally intended to
be self-contained and free standing
NOTE: A PMES would normally consist of a single module, but may consist of several interconnected modules.
In some cases different specifications apply to PMES and this is specified in the present document
radiated measurement: measurement of an actual radiated field
Special Test Equipment (STE): equipment which permits control of the MES so that the tests required by the present
document can be performed
test load: substantially non-reactive, non-radiating power attenuator which is capable of safely dissipating the power
from the transmitter(s)
unwanted emissions: emissions falling outside the nominated bandwidth in the carrier-on state
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11 Draft ETSI EN 301 721 V2.2.0 (2026-07)
Vehicle Mounted MES (VMES): MES intended to be installed on a vehicle
wideband system: in the context of the present document, it refers to a system in which the nominal carrier frequency
spacing for MESs in the Earth-to-space direction is equal to or greater than 300 kHz
3.2 Symbols
Void.
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AC Alternating Current
ASD Acceleration Spectral Density
BE Lower Band Edge of the operating band
L
BER Bit Error Rate
BE Upper Band Edge of the operating band
U
BMES Base MES
BW Wanted signalOccupied Bandwidth
CMF Control and Monitoring Function
CW Continuous Wave
dB deciBel
dBm deciBel with respect to miliwatt
dBpW deciBel with respect to pico Watt
DC Direct Current
DCAA Dynamic Channel Activity Assignment
DS-SSMA Direct Sequence Spread Spectrum Multiple Access
EIRP Equivalent Isotropically Radiated Power
EMC Electro-Magnetic Compatibility
EME Externally Mounted Equipment
EUT Equipment Under Test
FDMA Frequency Division Multiple Access
GHz Gigahertz
IE Installable Equipment
IEC International Electrotechnical Commission/Committee
IME Internally Mounted Equipment
kbp kilo bits per second
kbps kilobits per second
kHz kilo Hertz
LBRDC Low Bit Rate Data Communications
LEO Low Earth Orbit
LTE Laboratory Test Equipment
MES Mobile Earth Station
MHz Megahertz
MIC MES Identification Code
MSS Mobile satellite service
NOTE: Primary status as defined in Article 1 of the ITU Radio Regulations.
mss Mobile satellite service
NOTE: Secondary status as defined in Article 1 of the ITU Radio Regulations.
NCF Network Control Facility
OATS Open Area Test Site
PMES Portable MES
ppm parts per million
R&TTE Former Radio Directive
RAS Radio Astronomy Service
RE Radio Equipment
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12 Draft ETSI EN 301 721 V2.2.0 (2026-07)
RED Radio Equipment Directive
RF Radio Frequency
RR Radio Regulations
SNR Signal to Noise Ratio
STE Special Test Equipment
U/C Unconditional/Conditional
VMES Vehicle Mounted MES
4 Technical requirements specifications
4.1 Environmental profile
4.1.1 General
The technical requirements of the present document apply under the environmental profile for operation of the
equipment, which shall be in accordance with its intended use, but as a minimum, shall be that specified in the test
conditions contained in the present document. The equipment shall comply with all the technical requirements of the
present document at all times when operating within the boundary limits of the operational environmental profile
defined by its intended use.The environmental profile for operation of the equipment shall include the ranges of
temperature and supply voltage.
4.1.2 Temperature
The MES shall fulfil all the requirements in the full temperature ranges of:
-10 °C to +55 °C;
taken from IEC publications 60068-2-1 [2] and 60068-2-2 [3].
For MESs expected to operate in an environment outside this temperature range the definition of the intended use shall
indicate the necessary actions to ensure proper operation.
4.1.3 Voltage
The nominal, lower and the higher extreme voltages shall be indicated for the intended use of the MES.
The MES shall fulfil all the requirements in the full voltage range between the extreme voltages, for which the
equipment was designed.
Table 2: Void
4.2 Conformance requirements
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
4.2.1.1 Justification
To establish unwanted emission limits to protect other terrestrial services, space radio communications services and the
radio astronomy service from emissions caused by MESs 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.
ETSI
13 Draft ETSI EN 301 721 V2.2.0 (2026-07)
4.2.1.2 Technical requirements
The unwanted emissions from the MES outside the uplink 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, within which the MES is designed to operate, shall not
exceed the limits shown in tables 3, 4 and 5.
Table 3A: Unwanted emissions outside the operational band 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
for FDMA MESs with a bit rate up to 2,4 kbps
Maximum EIRP density
Frequency (dBpW) Measurement
(MHz) FDMA Bandwidth
0,1 to 148 54 100 kHz
150,05 to 235 54 100 kHz
322 to 335,4 54 100 kHz
400,05 to 1 000 54 100 kHz
1 000 to 1 559 60 1 MHz
1 559 to 1 626,5 50 1 MHz
1 626,5 to 12 750 60 1 MHz
Table 3B: Unwanted emissions outside the operational band 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
for FDMA MESs with a bit rate above 2,4 kbps
Maximum EIRP density
Frequency (dBpW) Measurement
(MHz) FDMA Bandwidth
0,1 to 147,900 54 100 kHz
147,9 to 147,950 54 to 85 (note 1) 100 kHz
147,950 to 148 85 (note 2) 100 kHz
150,05 to 150,100 85 (note 2) 100 kHz
150,100 to 150,150 85 to 54 (note 1) 100 kHz
150,150 to 235 54 100 kHz
322 to 335,4 54 100 kHz
400,05 to 1 000 54 100 kHz
1 000 to 1 559 60 1 MHz
1 559 to 1 626,5 50 1 MHz
1 626,5 to 12 750 60 1 MHz
NOTE 1: Linearly interpolated in dBpW vs. frequency.
NOTE 2: The measurement bandwidth is not permitted to overlapthe operational band at any
time during the measurement.
Table 4: Unwanted emissions for DS-SSMA MESs
outside the operational band 148 MHz to 150,05 MHz
Maximum EIRP density
Frequency (dBpW) Measurement
(MHz) DS-SSMA bandwidth
0,1 to 146 54 100 kHz
146 to 147,5 70 100 kHz
147,5 to 148 70 to 105 (see note) 100 kHz
150,05 to 151,15 70 100 kHz
151,15 to 1 000 54 100 kHz
1 000 to 1 559 60 1 MHz
1 559 to 1 626,5 50 1 MHz
1 626,5 to 12 750 60 1 MHz
NOTE: Linearly interpolated in dBpW vs. frequency.

ETSI
14 Draft ETSI EN 301 721 V2.2.0 (2026-07)
Table 5: Unwanted emissions for DS-SSMA MESs outside the operational bands
235 MHz to 322 MHz, 335,4 MHz to 399,9 MHz and 399,9 MHz to 400,05 MHz
Frequency Maximum EIRP density Measuring bandwidth
(MHz) (dBpW)
0,1 to 30 54 100 kHz
30 to 235 54 100 kHz
322 to 335,4 54 100 kHz
400,05 to 1 000 54 100 kHz
1 000 to 1 559 60 1 MHz
1 559 to 1 626,5 50 1 MHz
1 626,5 to 12 750 60 1 MHz
In tables 3, 4 and 5, whenever a change of limit between adjacent frequency bands occurs, the lower of the two limits
shall apply at the transition frequency.
The technical requirements apply for the full range of environmental conditions corresponding to the type of equipment
as specified in clause 5.1.2 (see clause 5.2.2).
4.2.1.3 Requirements for conformance test
This test shall be carried out for two MES frequencies, the minimum and the maximum MES transmit frequencies for
which the MES is designed to operate, as specified for the intended use of the MES.
The environmental test conditions are given in clause 5.1.2.
For each test, the MES shall be set to transmit (carrier-on state) on one of the specified transmitting frequencies to be
tested at its maximum power for that transmit frequency, by means of the STE provided within the EUT as for the
intended use of the MES.
When a handover function in the MES (to allow change of frequency channel during a transmission) is used, this
function shall be disabled.
The transmitted carrier shall be modulated by a pseudorandom bit sequence generated by the MES or by the STE. For a
MES operational in short burst mode, this sequence will be of length compatible with the maximum burst length
duration or the transmitted carrier shall be modulated by a test signal at maximum rate as specified in clause 5.2.4.2.3.
In the test equipment, the sp
...

SLOVENSKI STANDARD
01-september-2026
Satelitske zemeljske postaje in sistemi (SES) - Mobilne zemeljske postaje (MES), ki
zagotavljajo podatkovne komunikacije z majhno bitno hitrostjo (LBRDC) in
uporabljajo satelite na nizki orbiti (LEO) ter delujejo v frekvenčnem pasu pod 1
GHz - Harmonizirani standard za dostop do radijskega spektra
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 frequency band - Harmonised Standard for access to radio
spectrum
Ta slovenski standard je istoveten z: ETSI EN 301 721 V2.2.0 (2026-07)
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.

Draft ETSI EN 301 721 V2.2.0 (2026-07)

HARMONISED EUROPEAN STANDARD
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 frequency band
Harmonised Standard for access to radio spectrum

2 Draft ETSI EN 301 721 V2.2.0 (2026-07)

Reference
REN/SES-00434
Keywords
earth station, LEO, MES, mobile, MSS, regulation,
satellite
ETSI
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ETSI
3 Draft ETSI EN 301 721 V2.2.0 (2026-07)
Contents
Intellectual Property Rights . 6
Foreword . 6
Modal verbs terminology . 6
Introduction . 7
1 Scope . 8
2 References . 8
2.1 Normative references . 8
2.2 Informative references . 9
3 Definition of terms, symbols and abbreviations . 9
3.1 Terms . 9
3.2 Symbols . 11
3.3 Abbreviations . 11
4 Technical requirements specifications . 12
4.1 Environmental profile . 12
4.1.1 General . 12
4.1.2 Temperature . 12
4.1.3 Voltage . 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 . 13
4.2.1.3 Requirements for conformance test . 14
4.2.1.4 Requirements for test conditions . 14
4.2.1.5 Requirements for tests . 15
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 Requirements for conformance test . 16
4.2.2.4 Requirements for test conditions . 16
4.2.2.5 Requirements for tests . 17
4.2.3 EIRP density within the operational band. 17
4.2.3.1 Justification . 17
4.2.3.2 Technical requirements . 17
4.2.3.3 Requirements for conformance test . 17
4.2.3.4 Test conditions . 18
4.2.3.5 Requirements for tests . 18
4.2.4 Unwanted emissions in carrier-off state . 18
4.2.4.1 Justification . 18
4.2.4.2 Technical requirements . 18
4.2.4.3 Requirements for conformance test . 18
4.2.4.4 Requirements for test conditions . 19
4.2.4.5 Requirements for tests . 19
4.2.5 MES Control and Monitoring Functions (CMF) . 19
4.2.5.1 Justification . 19
4.2.5.2 Special Test Equipment (STE) . 19
4.2.5.3 Technical requirements . 19
4.2.5.3.1 Void . 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
4 Draft ETSI EN 301 721 V2.2.0 (2026-07)
4.2.6.2 Technical requirements . 22
4.2.6.3 Requirements for conformance test . 22
4.2.6.4 Requirements for test procedure . 22
4.2.6.5 Requirements for tests . 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 Requirements for 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 Requirements for conformance test . 24
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 Requirements for 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 . 25
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) . 27
5.2.4.2.1 STE description . 27
5.2.4.2.2 Use of STE for control and monitoring functions tests . 27
5.2.4.2.3 Test modulating signal . 28
5.2.4.3 Laboratory Test Equipment (LTE) . 28
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 Test set up arrangements . 28
5.2.5.2 Set up for combined equipment . 28
5.2.5.3 Set up for the use of a test jig . 29
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
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5 Draft ETSI EN 301 721 V2.2.0 (2026-07)
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 (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 36
Annex B (informative): Maximum measurement uncertainty . 39
Annex C (informative): Vibration . 40
Annex D (informative): Bibliography . 41
Annex E (informative): Change history . 42
History . 43

ETSI
6 Draft ETSI EN 301 721 V2.2.0 (2026-07)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI IPR online database.
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
Trademarks
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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.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its
Members. 3GPP™, LTE™ and 5G™ logo are trademarks of ETSI registered for the benefit of its Members and of the
3GPP Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of ®
the oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
Foreword
This 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
Standardisation Request deliverable Approval Procedure (SRdAP).
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 [i.3].
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).
ETSI
7 Draft ETSI EN 301 721 V2.2.0 (2026-07)
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Introduction
The present document is based on ETSI EN 300 721 [i.5].
The present document does not contain any requirement, recommendation, or information about the installation of the
MESs.
ETSI
8 Draft ETSI EN 301 721 V2.2.0 (2026-07)
1 Scope
The present document specifies technical characteristics and methods of measurements for Mobile Earth Stations
(MES) providing Low Bit Rate Data Communications (LBRDC) using Low Earth Orbit (LEO) satellites and which
have the following characteristics:
- the MES as covered by the present document are 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 are designed to operate in all or any part of the frequency bands given in table 1.
- The MESs have to be part of a satellite network and controlled and monitored by a Network Control Facility
(NCF). The specification of the NCF is outside the scope of the present document.
Table 1: Frequency ranges in Transmit and Receive frequencies
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 MSS 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 MSS 235 to 322 MSS
335,4 to 399,9 MSS
400,15 to 401 MSS
NOTE 1: The acronyms "MSS" and "mss" refer to mobile satellite service (See list of abbreviations). Capital letters
"MSS" refer to Primary MSS service. Lower case "mss" refers to secondary MSS service.
The present document is intended to cover the provisions of article 3.2 of Directive 2014/53/EU [i.3] (RE Directive).
NOTE 2: The relationship between the present document and essential requirements of article 3.2 of the Directive
2014/53 [i.3] is given in Annex A.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found in the
ETSI docbox.
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 (2025): "Environmental testing - Part 2: Tests. Tests A: Cold".
[3] IEC Publication 60068-2-2 (2025): "Environmental testing - Part 2: Tests. Tests B: Dry heat".
[4] Void.
ETSI
9 Draft ETSI EN 301 721 V2.2.0 (2026-07)
[5] Void.
[6] CISPR 16-1-5:2014+AMD1:2016 CSV: "Specification for radio disturbance and immunity
measuring apparatus and methods - Part 1-5: Radio disturbance and immunity measuring
apparatus - Antenna calibration sites and reference test sites for 5 MHz to 18 GHz".
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 may be useful in implementing an ETSI deliverable or add to the reader's
understanding, but are not required for conformance to the present document.
[i.1] Void.
[i.2] Commission Implementing Decision C(2015) 5376 of 4.8.2015 on a standardisation request to the
European Committee for Electrotechnical Standardisation and to the European
Telecommunications Standards Institute as regards radio equipment in support of Directive
2014/53/EU of the European Parliament and of the Council.
[i.3] Directive 2014/53/EU of the European Parliament and of the Council of 16 April 2014 on the
harmonisation of the laws of the Member States relating to the making available on the market of
radio equipment and repealing Directive 1999/5/EC.
[i.4] Recommendation ITU-R M.1039-1: Co-frequency sharing between stations in the mobile service
below 1 GHz and FDMA non-geostationary-satellite orbit (non-GSO) mobile earth stations.
[i.5] ETSI EN 300 721 (V2.1.1) (2016): "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".
[i.6] IEC 60068-2-64:2008+AMD1:2019 CSV: "Environmental testing - Part 2-64: Tests - Test Fh:
Vibration, broadband random and guidance".
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
BMES (Based MES): MES intended to be installed in a fixed location, and which is powered either by DC or AC
power supply
carrier-off state: radio state in which the MES does not actually transmit a carrier
carrier-on state: state in which the MES is transmitting a carrier
conducted measurement: measurement of emissions from an antenna port of the MES made by direct wired
connection to the port
control channel: channel used to transmit a signal from the satellite containing control information used to command
the MES either to enable or disable its transmission
environmental profile: range of environmental conditions under which equipment within the scope of the present
document is required to comply with the provisions of the present document
ETSI
10 Draft ETSI EN 301 721 V2.2.0 (2026-07)
Equivalent Isotropically Radiated Power (EIRP): product of transmitter power and antenna gain, equivalent to an
isotropic source radiating uniformly in all directions
host-connected: MES for which connection to or integration with host equipment is necessary to provide functionality
host equipment: equipment which has a complete user functionality when not connected to the MES, and to which the
MES provides additional functionality, and to which connection is necessary for the MES to provide functionality
in-band signals: signals which are located in the occupied bandwidth
Installable Equipment (IE), Internally Mounted Equipment (IME) And Externally Mounted Equipment (EME):
equipment which is intended to be installed either internally or externally to the MES (usually in a vehicle)
NOTE: An IE consists of one or several interconnected modules. The IE is composed of modules intended to be
externally mounted as defined for the intended use of the MES and defined as Externally Mounted
Equipment (EME) and the remaining modules(s) as Internally Mounted Equipment (IME).
Laboratory Test Equipment (LTE): logical grouping that contains the standard test equipment
Low bit rate data communications: in the present document, bit rates up to 15 kbps
MSS band: continuous range of frequencies allocated by the ITU to the MSS (Mobile Satellite Service)
narrow-band system: a system in which the nominal carrier frequency spacing for MESs in the Earth-to-space
direction is less than 300 kHz
NCF control message: message, normally originating from a network, to a specified terminal or set of terminals of the
network which indicates to the terminal or set of terminals that it/they should carry out some specific action or should
enter or maintain some specific state
NOTE: For test purposes NCF control messages may originate from Special Test Equipment (STE).
network control channel: channel by which an MES receives general control information from the NCF
nominated bandwidth: bandwidth of the MES radio frequency transmission nominated for the intended use of the
MES and which meets the following conditions of notes 1 and 2 below.
NOTE 1: The nominated bandwidth is wide enough to encompass all spectral elements of the transmission which
have a level greater than the specified unwanted emissions limits. The nominated bandwidth is also wide
enough to take account of the transmit carrier frequency stability. This definition is chosen to allow
flexibility regarding adjacent channel interference levels which will be taken into account by operational
procedures depending on the exact transponder carrier assignment situation.The nominated bandwidth is
within the MSS transmit frequency band within which the MES operates.
NOTE 2: For FDMA/DCAA [i.4] systems with a bit rate up to 2,4 kbps the Nominated Bandwidth does not exceed
25 kHz. For FDMA/DCAA systems with a bit rate up above 2,4 kbps the Nominated Bandwidth does not
exceed 50 kHz.
occupied Bandwidth: for a digital modulation scheme - the width of the signal spectrum 10 dB below the maximum
inband density
Portable MES (PMES): MES intended to be portable, and powered by a stand alone battery, and generally intended to
be self-contained and free standing
NOTE: A PMES would normally consist of a single module, but may consist of several interconnected modules.
In some cases different specifications apply to PMES and this is specified in the present document
radiated measurement: measurement of an actual radiated field
Special Test Equipment (STE): equipment which permits control of the MES so that the tests required by the present
document can be performed
test load: substantially non-reactive, non-radiating power attenuator which is capable of safely dissipating the power
from the transmitter(s)
unwanted emissions: emissions falling outside the nominated bandwidth in the carrier-on state
ETSI
11 Draft ETSI EN 301 721 V2.2.0 (2026-07)
Vehicle Mounted MES (VMES): MES intended to be installed on a vehicle
wideband system: in the context of the present document, it refers to a system in which the nominal carrier frequency
spacing for MESs in the Earth-to-space direction is equal to or greater than 300 kHz
3.2 Symbols
Void.
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AC Alternating Current
ASD Acceleration Spectral Density
BE Lower Band Edge of the operating band
L
BER Bit Error Rate
BE Upper Band Edge of the operating band
U
BMES Base MES
BW Wanted signalOccupied Bandwidth
CMF Control and Monitoring Function
CW Continuous Wave
dB deciBel
dBm deciBel with respect to miliwatt
dBpW deciBel with respect to pico Watt
DC Direct Current
DCAA Dynamic Channel Activity Assignment
DS-SSMA Direct Sequence Spread Spectrum Multiple Access
EIRP Equivalent Isotropically Radiated Power
EMC Electro-Magnetic Compatibility
EME Externally Mounted Equipment
EUT Equipment Under Test
FDMA Frequency Division Multiple Access
GHz Gigahertz
IE Installable Equipment
IEC International Electrotechnical Commission/Committee
IME Internally Mounted Equipment
kbp kilo bits per second
kbps kilobits per second
kHz kilo Hertz
LBRDC Low Bit Rate Data Communications
LEO Low Earth Orbit
LTE Laboratory Test Equipment
MES Mobile Earth Station
MHz Megahertz
MIC MES Identification Code
MSS Mobile satellite service
NOTE: Primary status as defined in Article 1 of the ITU Radio Regulations.
mss Mobile satellite service
NOTE: Secondary status as defined in Article 1 of the ITU Radio Regulations.
NCF Network Control Facility
OATS Open Area Test Site
PMES Portable MES
ppm parts per million
R&TTE Former Radio Directive
RAS Radio Astronomy Service
RE Radio Equipment
ETSI
12 Draft ETSI EN 301 721 V2.2.0 (2026-07)
RED Radio Equipment Directive
RF Radio Frequency
RR Radio Regulations
SNR Signal to Noise Ratio
STE Special Test Equipment
U/C Unconditional/Conditional
VMES Vehicle Mounted MES
4 Technical requirements specifications
4.1 Environmental profile
4.1.1 General
The technical requirements of the present document apply under the environmental profile for operation of the
equipment, which shall be in accordance with its intended use, but as a minimum, shall be that specified in the test
conditions contained in the present document. The equipment shall comply with all the technical requirements of the
present document at all times when operating within the boundary limits of the operational environmental profile
defined by its intended use.The environmental profile for operation of the equipment shall include the ranges of
temperature and supply voltage.
4.1.2 Temperature
The MES shall fulfil all the requirements in the full temperature ranges of:
-10 °C to +55 °C;
taken from IEC publications 60068-2-1 [2] and 60068-2-2 [3].
For MESs expected to operate in an environment outside this temperature range the definition of the intended use shall
indicate the necessary actions to ensure proper operation.
4.1.3 Voltage
The nominal, lower and the higher extreme voltages shall be indicated for the intended use of the MES.
The MES shall fulfil all the requirements in the full voltage range between the extreme voltages, for which the
equipment was designed.
Table 2: Void
4.2 Conformance requirements
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
4.2.1.1 Justification
To establish unwanted emission limits to protect other terrestrial services, space radio communications services and the
radio astronomy service from emissions caused by MESs 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.
ETSI
13 Draft ETSI EN 301 721 V2.2.0 (2026-07)
4.2.1.2 Technical requirements
The unwanted emissions from the MES outside the uplink 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, within which the MES is designed to operate, shall not
exceed the limits shown in tables 3, 4 and 5.
Table 3A: Unwanted emissions outside the operational band 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
for FDMA MESs with a bit rate up to 2,4 kbps
Maximum EIRP density
Frequency (dBpW) Measurement
(MHz) FDMA Bandwidth
0,1 to 148 54 100 kHz
150,05 to 235 54 100 kHz
322 to 335,4 54 100 kHz
400,05 to 1 000 54 100 kHz
1 000 to 1 559 60 1 MHz
1 559 to 1 626,5 50 1 MHz
1 626,5 to 12 750 60 1 MHz
Table 3B: Unwanted emissions outside the operational band 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
for FDMA MESs with a bit rate above 2,4 kbps
Maximum EIRP density
Frequency (dBpW) Measurement
(MHz) FDMA Bandwidth
0,1 to 147,900 54 100 kHz
147,9 to 147,950 54 to 85 (note 1) 100 kHz
147,950 to 148 85 (note 2) 100 kHz
150,05 to 150,100 85 (note 2) 100 kHz
150,100 to 150,150 85 to 54 (note 1) 100 kHz
150,150 to 235 54 100 kHz
322 to 335,4 54 100 kHz
400,05 to 1 000 54 100 kHz
1 000 to 1 559 60 1 MHz
1 559 to 1 626,5 50 1 MHz
1 626,5 to 12 750 60 1 MHz
NOTE 1: Linearly interpolated in dBpW vs. frequency.
NOTE 2: The measurement bandwidth is not permitted to overlapthe operational band at any
time during the measurement.
Table 4: Unwanted emissions for DS-SSMA MESs
outside the operational band 148 MHz to 150,05 MHz
Maximum EIRP density
Frequency (dBpW) Measurement
(MHz) DS-SSMA bandwidth
0,1 to 146 54 100 kHz
146 to 147,5 70 100 kHz
147,5 to 148 70 to 105 (see note) 100 kHz
150,05 to 151,15 70 100 kHz
151,15 to 1 000 54 100 kHz
1 000 to 1 559 60 1 MHz
1 559 to 1 626,5 50 1 MHz
1 626,5 to 12 750 60 1 MHz
NOTE: Linearly interpolated in dBpW vs. frequency.

ETSI
14 Draft ETSI EN 301 721 V2.2.0 (2026-07)
Table 5: Unwanted emissions for DS-SSMA MESs outside the operational bands
235 MHz to 322 MHz, 335,4 MHz to 399,9 MHz and 399,9 MHz to 400,05 MHz
Frequency Maximum EIRP density Measuring bandwidth
(MHz) (dBpW)
0,1 to 30 54 100 kHz
...