ETSI EN 302 480 V1.1.2 (2008-04)
Electromagnetic compatibility and Radio spectrum Matters (ERM); Harmonized EN for the GSM onboard aircraft system covering the essential requirements of Article 3.2 of the R&TTE Directive
Electromagnetic compatibility and Radio spectrum Matters (ERM); Harmonized EN for the GSM onboard aircraft system covering the essential requirements of Article 3.2 of the R&TTE Directive
DEN/ERM-GSMOBA-001
Elektromagnetna združljivost in zadeve v zvezi z radijskim spektrom (ERM) - Harmonizirani EN za sisteme GSM na letalih, ki zajema bistvene zahteve člena 3.2 direktive R&TTE
General Information
Standards Content (Sample)
Final draft ETSI EN 302 480 V1.1.2 (2008-02)
Harmonized European Standard (Telecommunications series)
Electromagnetic compatibility
and Radio spectrum Matters (ERM);
Harmonized EN for the GSM onboard aircraft system
covering the essential requirements
of Article 3.2 of the R&TTE Directive
2 Final draft ETSI EN 302 480 V1.1.2 (2008-02)
Reference
DEN/ERM-GSMOBA-001
Keywords
GSM
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ETSI
3 Final draft ETSI EN 302 480 V1.1.2 (2008-02)
Contents
Intellectual Property Rights.6
Foreword.6
Introduction .6
1 Scope.7
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.9
4 Technical requirements specifications .10
4.1 General.10
4.1.1 Environmental profile.10
4.1.2 GSMOBA system states .10
4.2 Conformance requirements.12
4.2.1 OBTS Transmitter Performance.12
4.2.1.1 OBTS maximum output power .12
4.2.1.1.1 Definition.12
4.2.1.1.2 Limits.12
4.2.1.2 OBTS Output RF spectrum.12
4.2.1.2.1 Spectrum due to modulation and wideband noise .12
4.2.1.2.2 Spectrum due to switching transients .12
4.2.1.3 OBTS Radio Frequency Tolerance .12
4.2.1.3.1 Definition.12
4.2.1.3.2 Limits.12
4.2.1.4 OBTS controlled MS RF power.13
4.2.1.4.1 Definition.13
4.2.1.4.2 Limits.13
4.2.2 OBTS Receiver Performance.13
4.2.2.1 OBTS Reference Sensitivity Level .13
4.2.2.1.1 Definition.13
4.2.2.1.2 Limits.13
4.2.2.2 Unwanted emissions in the spurious domain .13
4.2.2.2.1 Definition.13
4.2.2.2.2 Limits.13
4.2.3 NCU Transmitter Performance.13
4.2.3.1 NCU maximum mean power spectral density.13
4.2.3.1.1 Definition.13
4.2.3.1.2 Limits.14
4.2.3.2 NCU power flatness.14
4.2.3.2.1 Definition.14
4.2.3.2.2 Limits.14
4.2.4 GSMOBA Transmitter Performance .14
4.2.4.1 Unwanted emissions in the out-of-band domain.14
4.2.4.1.1 Definition.14
4.2.4.1.2 Limits.14
4.2.4.2 Unwanted emissions in the spurious domain .15
4.2.4.2.1 Definition.15
4.2.4.2.2 Limits.15
4.2.4.3 Cessation of emissions .15
4.2.4.3.1 Definition.15
4.2.4.3.2 Specification.15
5 Testing for compliance with technical requirements.15
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4 Final draft ETSI EN 302 480 V1.1.2 (2008-02)
5.1 Interpretation of results and measurement uncertainty.15
5.1.1 Environmental conditions for testing.15
5.1.2 Interpretation of the measurement results.16
5.1.3 Measurement options.16
5.2 Essential radio test suites.17
5.2.1 OBTS Transmitter Performance.17
5.2.1.1 OBTS Output power .17
5.2.1.1.1 Test purpose .17
5.2.1.1.2 Test case.17
5.2.1.2 OBTS RF spectrum.17
5.2.1.2.1 Spectrum due to modulation and wideband noise .17
5.2.1.2.2 Spectrum due to switching transients .17
5.2.1.3 OBTS Radio Frequency Tolerance .17
5.2.1.3.1 Test purpose .17
5.2.1.3.2 Test case.18
5.2.1.4 OBTS controlled MS RF power.18
5.2.1.4.1 Test purpose .18
5.2.1.4.2 Methods of measurement.18
5.2.2 OBTS Receiver Performance.19
5.2.2.1 OBTS Reference Sensitivity Level .19
5.2.2.1.1 Test Purpose .19
5.2.2.1.2 Test Case.19
5.2.2.2 Unwanted emissions in the spurious domain .19
5.2.2.2.1 Test Purpose .19
5.2.2.2.2 Test Case.19
5.2.3 NCU Transmitter Performance.19
5.2.3.1 NCU maximum mean power spectral density.19
5.2.3.1.1 Test purpose .19
5.2.3.1.2 Methods of measurement.20
5.2.3.2 NCU power flatness.20
5.2.3.2.1 Test purpose .20
5.2.3.2.2 Methods of measurement.21
5.2.4 GSMOBA Transmitter Performance .21
5.2.4.1 Unwanted emissions in the out-of band domain .21
5.2.4.1.1 Test purpose .21
5.2.4.1.2 Methods of measurement.22
5.2.4.1.2.1 Unwanted emissions in the out-of-band domain when OBTS is in standby state.22
5.2.4.1.2.2 Unwanted emissions in the out-of-band domain when OBTS is in active state.22
5.2.4.2 Unwanted emissions in the spurious domain .23
5.2.4.2.1 Test purpose .23
5.2.4.2.2 Methods of measurement.23
5.2.4.2.2.1 Unwanted emissions in the spurious domain when system is in standby state .23
5.2.4.2.2.2 Unwanted emissions in the spurious domain when system is in active state .23
5.2.4.3 Cessation of emissions .24
5.2.4.3.1 Test purpose .24
5.2.4.3.2 Methods of measurement.24
Annex A (normative): HS Requirements and conformance Test specifications Table (HS-
RTT).26
Annex B (normative): Environmental conditions .28
B.1 General.28
B.2 Environmental conformance requirements.28
B.3 Environmental test conditions.28
Annex C (informative): System Description .29
C.1 High level System Description.29
C.2 OBTS.30
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5 Final draft ETSI EN 302 480 V1.1.2 (2008-02)
C.3 RF Screening.30
C.4 Dedicated antenna system .30
C.5 Dedicated antenna installation.31
Annex D (informative): The EN title in the official languages .32
Annex E (informative): Bibliography.33
History .34
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6 Final draft ETSI EN 302 480 V1.1.2 (2008-02)
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 (http://webapp.etsi.org/IPR/home.asp).
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 Harmonized European Standard (Telecommunications series) has been produced by ETSI Technical Committee
Electromagnetic compatibility and Radio spectrum Matters (ERM), and is now submitted for the Vote phase of the
ETSI standards Two-step Approval Procedure.
The present document has been produced by ETSI in response to a mandate from the European Commission issued
under Council Directive 98/34/EC [12] (as amended) laying down a procedure for the provision of information in the
field of technical standards and regulations.
The present document is intended to become a Harmonized Standard, the reference of which will be published in the
Official Journal of the European Communities referencing the Directive 1999/5/EC [11] of the European Parliament
and of the Council of 9 March 1999 on radio equipment and telecommunications terminal equipment and the mutual
recognition of their conformity ("the R&TTE Directive").
Technical specifications relevant to Directive 1999/5/EC [11] are given in annex A.
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
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 R&TTE Directive. The modular
structure is shown in EG 201 399 [13].
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7 Final draft ETSI EN 302 480 V1.1.2 (2008-02)
1 Scope
The present document applies to a system comprising the following radio equipment types:
1) an Onboard GSM Base Transceiver System (OBTS) supporting the GSM 1800 functions with specific
protocols for power constraints;
2) a Network Control Unit (NCU) preventing direct connection of the onboard mobile terminals with mobile
networks on the ground by raising the noise floor in the cabin.
These radio equipment types are capable of operating in all or any part of the frequency bands given below:
Table 1: Radiocommunications service frequency bands
Radiocommunications service frequency bands
Transmit 1 (OBTS) 1 805 MHz to 1 880 MHz
Receive 1 (OBTS) 1 710 MHz to 1 785 MHz
Transmit 2 (NCU) 460 MHz to 470 MHz
Transmit 2 (NCU) 921 MHz to 960 MHz
Transmit 2 (NCU) 1 805 MHz to 1 880 MHz
Transmit 2 (NCU) 2 110 MHz to 2 170 MHz
It applies to equipment for continuous and discontinuous transmission of data and digital speech.
The present document applies only to radio equipment using a dedicated transmitting antenna that is designed as an
indispensable part of the system for usage on board an aircraft.
The system covered by the present document operates in accordance with the operational requirements as outlined in
the Decision CEPT/ECC/DEC/(06)07 [14].
The present document covers the provisions of Directive 1999/5/EC (the R&TTE Directive), Article 3.2, which states
that "…. radio equipment shall be so constructed that it effectively uses the spectrum allocated to terrestrial/space radio
communications and orbital resources so as 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 R&TTE Directive may apply to equipment within the scope of the present
document.
NOTE: A list of such ENs is included on the web site http://www.newapproach.org.
The present document does not cover equipment compliance with relevant civil aviation regulations. In this respect, a
GSMOBA system, for its installation and operation on board an aircraft is subject to additional national or international
civil aviation airworthiness certification requirements, for example to EUROCAE ED-14E [10].
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8 Final draft ETSI EN 302 480 V1.1.2 (2008-02)
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] ETSI TS 145 005: "Digital cellular telecommunications system (Phase 2+); Radio transmission
and reception (3GPP TS 45.005 version 6.14.0 Release 6)".
[2] ETSI TS 145 010: "Digital cellular telecommunications system (Phase 2+); Radio subsystem
synchronization (3GPP TS 45.010 version 6.6.0 Release 6)".
[3] ETSI TS 145 008: "Digital cellular telecommunications system (Phase 2+); Radio subsystem link
control (3GPP TS 45.008 version 6.19.0 Release 6)".
[4] 3GPP2 C.S0011-C (V2.0): "Recommended Minimum Performance Standards for cdma2000
Spread Spectrum Mobile Stations".
NOTE: http://www.3gpp2.org/Public_html/specs/C.S0011-C_v2.0_060315.pdf
[5] ETSI TS 125 104: "Universal Mobile Telecommunications System (UMTS); Base Station (BS)
radio transmission and reception (FDD) (3GPP TS 25.104 version 6.16.0 Release 6)".
[6] ETSI TR 100 028 (all parts) (V1.4.1): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Uncertainties in the measurement of mobile radio equipment characteristics".
[7] ETSI TS 151 021: "Digital cellular telecommunications system (Phase 2+); Base Station System
(BSS) equipment specification; Radio aspects (3GPP TS 51.021 version 6.3.0 Release 6)".
[8] ETSI TS 145 004: "Digital cellular telecommunications system (Phase 2+); Modulation
(3GPP TS 45.004 version 6.0.0 Release 6)".
[9] CISPR 16-2-1 (2005): "Specification for radio disturbance and immunity measuring apparatus and
methods - Part 2-1: Methods of measurement of disturbances and immunity - Conducted
disturbance measurements".
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9 Final draft ETSI EN 302 480 V1.1.2 (2008-02)
[10] EUROCAE ED-14E (2005) (Equivalent to RTCA DO-160E): "Environmental Conditions and Test
Procedures for Airborne Equipment".
2.2 Informative references
[11] Directive 1999/5/EC of the European Parliament and of the Council of 9 March 1999 on radio
equipment and telecommunications terminal equipment and the mutual recognition of their
conformity (R&TTE Directive).
[12] Directive 98/34/EC of the European Parliament and of the Council of 22 June 1998 laying down a
procedure for the provision of information in the field of technical standards and regulations.
[13] ETSI EG 201 399 (V2.1.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
A guide to the production of candidate Harmonized Standards for application under the R&TTE
Directive".
[14] CEPT/ECC/DEC/(06)07: "ECC Decision of 1 December 2006 on the harmonized use of airborne
GSM systems in the frequency bands 1710-1785 and 1805-1880 MHz".
[15] CEPT/ERC/REC 74-01 (2005) (equivalent to ITU-R Recommendation SM.329-10): "Unwanted
emissions in the spurious domain".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
Base Station System Test Equipment (BSSTE): functional tool for the purpose of acceptance testing of GSM Base
Station Systems
NOTE: The BSSTE functionally carries out all tests described in the OBTS specification.
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
GSM onboard aircraft system: system comprising the functions provided by the NCU and the OBTS
Network Control Unit (NCU): component of the GSM onboard aircraft system preventing direct connection of the
onboard mobile terminals with mobile networks on the ground by raising the noise floor in the cabin
Onboard Base Transceiver Station (OBTS): component of the GSM onboard aircraft system responsible for radio
transmission and reception to or from the onboard mobile terminals
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ACU Antenna Coupler Unit
AGL Above Ground Level
BER Bit Error Rate
BCCH Broadcast Control CHannel
BLER Block Error Rate
BSSTE Base Station System Test Equipment
BTS Base Transceiver Station
dB decibel
dBm decibel relative to 1 mW
DTM Dual Transfer Mode
e.i.r.p. equivalent isotropically radiated power
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10 Final draft ETSI EN 302 480 V1.1.2 (2008-02)
ECC Electronic Communications Committee
FER Frame Error Rate
GGW Ground GateWay
GPRS General Packet Radio Service
GSM Global System for Mobile communications
GSMOBA GSM OnBoard Aircraft
MS Mobile Station
MSC Mobile Switching Centre
NCU Network Control Unit
OBTS Onboard Base Transceiver Station
PBCCH Packet Broadcast Control CHannel
R&TTE Radio and Telecommunications Terminal Equipment
RACH Random Access CHannel
RBER Residual BER
RBW Resolution BandWidth
RF Radio Frequency
rms root mean square
SGSN Serving GPRS Support Node
STE Special Test Equipment
TCH Traffic CHannel
VBW Video BandWidth
4 Technical requirements specifications
4.1 General
4.1.1 Environmental profile
The technical requirements of the present document apply under the environmental profile for operation of the
equipment, which shall be declared by the supplier. The equipment shall comply with all the technical requirements of
the present document at all times when operating within the boundary limits of the declared operational environmental
profile and for the environmental conditions (as specified in clause B.3).
4.1.2 GSMOBA system states
Figure 1 represents the state diagram of the GSMOBA system.
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11 Final draft ETSI EN 302 480 V1.1.2 (2008-02)
Figure 1: State diagram of GSMOBA system
When the NCU function of the GSMOBA system is in NCU Active state the Transmitter of the NCU is powered up,
whereas when the NCU function of the GSMOBA system is in NCU Standby state the Transmitter of the NCU is
powered down.
When the OBTS function of the GSMOBA system is in OBTS Active state the Transmitter of the OBTS is powered up,
whereas when the OBTS function of the GSMOBA system is in OBTS Standby state the Transmitter of the OBTS is
powered down.
When the GSMOBA system is in Active state, both the OBTS and the NCU are in Active state, whereas when the
GSMOBA system is in Standby state, both OBTS and NCU are in Standby state.
The NCU function for the relevant frequency band(s) of the GSMOBA system is allowed to enter the "Active" state
after take-off or to remain in the "Active" state during the flight only when the regulatory conditions for the service
operation as authorized by the regulatory administration of the country passed over are satisfied.
The OBTS function of the GSMOBA system is allowed to enter the "Active" state after the take-off or to remain in the
"Active" state during the flight only when the regulatory condition for the service operation as authorized by the
regulatory administration of the country passed over are satisfied and proper NCU initialization has been reached. The
OBTS function is not allowed to be in the "Active" state unless the NCU function is also in the "Active" state.
The OBTS function of the GSMOBA system enters the "Standby" state:
• when the aircraft reaches during the descend phase the regulatory condition as authorized by the regulatory
administration of the country/countries passed over when approaching the airport, or
• before the aircraft enters into the airspace of a country whose regulatory administration does not allow the use
of GSMOBA services in the airspace above its territory.
The NCU function of the GSMOBA system enters the "Standby" state after the OBTS has entered the "Standby" state
and:
• when the aircraft reaches during the descend phase the regulatory condition as authorized by the regulatory
administration of the country/countries passed over when approaching the airport; or
• before the aircraft enters into the airspace of a country whose regulatory administration does not allow the use
of GSMOBA services in the airspace above its territory.
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12 Final draft ETSI EN 302 480 V1.1.2 (2008-02)
4.2 Conformance requirements
4.2.1 OBTS Transmitter Performance
4.2.1.1 OBTS maximum output power
4.2.1.1.1 Definition
Output power refers to the measure of the power when averaged over the useful part of the burst (see clause 4.1.2 of
TS 145 005 [1]).
4.2.1.1.2 Limits
The limit for the OBTS maximum output power shall conform to the maximum limit in clause 4.1.2 of TS 145 005 [1]
for the DCS 1800 BTS power class P1 (pico BTS).
NOTE: Conformance to the power limits in clause 4.1.2 of TS 145 005 [1] for the BTS power class P1 should not
be interpreted as conformance of e.i.r.p. authorization limits as defined in the
CEPT/ECC/DEC/(06)07 [14].
4.2.1.2 OBTS Output RF spectrum
4.2.1.2.1 Spectrum due to modulation and wideband noise
4.2.1.2.1.1 Definition
The spectrum due to modulation and wideband noise is the spectral spread caused by the modulation process in the
transmitter.
4.2.1.2.1.2 Limits
The limit for the OBTS output RF modulation spectrum shall conform to the limits in clause 4.2.1 of TS 145 005 [1] for
the applicable DCS 1800 BTS power class P1 (pico BTS).
4.2.1.2.2 Spectrum due to switching transients
4.2.1.2.2.1 Definition
The spectrum due to switching transients is the undesirable spectrum components in the transmission if the RF power is
ramped too quickly.
4.2.1.2.2.2 Limits
The limit for the OBTS RF switching transients spectrum shall conform to the limits in clause 4.2.2 of TS 145 005 [1]
for the applicable DCS 1800 BTS.
4.2.1.3 OBTS Radio Frequency Tolerance
4.2.1.3.1 Definition
The radio frequency tolerance of the transmitter is the difference between the unmodulated carrier frequency and the
nominal frequency selected for the test.
4.2.1.3.2 Limits
The limit for the radio frequency tolerance shall conform to the limits in clause 5.1 of TS 145 010 [2] for the applicable
DCS 1800 BTS power class P1 (pico BTS).
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13 Final draft ETSI EN 302 480 V1.1.2 (2008-02)
4.2.1.4 OBTS controlled MS RF power
4.2.1.4.1 Definition
When an MS is switched on, it first scans its RF environment, then selects one GSM cell to camp on and then decodes
the System Information transmitted on the BCCH channel of that cell. One of the parameters
(MS_TXPWR_MAX_CCH) contained in the System Information (SI3) indicates to MS the maximum transmit power
level that can be used by an MS during the initial access.
4.2.1.4.2 Limits
The following parameters shall be set to the power control level 15 i.e. 0 dBm as stated for DCS 1800 MS
(TS 145 005 [1], clause 4.1.1):
- MS_TXPWR_MAX_CCH;
- POWER_LEVEL; and
- GPRS_MS_TXPWR_MAX_CCH (if PBCCH is implemented).
POWER OFFSET shall be set to the value "0" i.e. 0 dB (TS 145 008 [3], clause 9 only applicable for class 3
DCS1800 MS).
4.2.2 OBTS Receiver Performance
4.2.2.1 OBTS Reference Sensitivity Level
4.2.2.1.1 Definition
The static reference sensitivity level of the receiver is the level of signal at the receiver input with a standard test signal
at which the receiver will produce after demodulation and channel decoding data with a Frame Erasure Ratio (FER),
Residual Bit Error Ratio (RBER) Bit Error Ratio (BER) or Block Error Ratio (BLER) better than or equal to that
specified for a specific logical channel type under static propagation conditions.
4.2.2.1.2 Limits
The limit for the OBTS reference sensivity level shall conform to the limits in clause 6.2 of TS 145 005 [1] for the
applicable DCS 1800 BTS power class P1 (pico BTS).
4.2.2.2 Unwanted emissions in the spurious domain
4.2.2.2.1 Definition
Unwanted emissions in the spurious domain are emissions at frequencies, other than those of the transmitter carrier and
sidebands associated with normal modulation at the adjacent frequencies.
4.2.2.2.2 Limits
The limit for the spurious emissions for the OBTS Receiver shall conform to the limits in clause 5.4 of TS 145 005 [1].
4.2.3 NCU Transmitter Performance
4.2.3.1 NCU maximum mean power spectral density
4.2.3.1.1 Definition
The mean power spectral density for a given reference bandwidth represents the ratio of the mean value of the measured
power over the reference bandwidth and the reference bandwidth itself.
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14 Final draft ETSI EN 302 480 V1.1.2 (2008-02)
4.2.3.1.2 Limits
The maximum mean power spectral density shall not exceed the value contained in table 2.
Table 2: Power spectral density limit
Frequency band (MHz) 460 to 470 921 to 960 1 805 to 1 880 2 110 to 2 170
Reference bandwidth 1,25 MHz 200 kHz 200 kHz 3,84 MHz
Power (dBm within
25 20 23 24
reference bandwidth)
NOTE 1: The values for frequency bands 900 MHz (20 dBm) and 1 800 MHz (23 dBm) have been taken from the
upper limit of the power class P1 (see TS 145 005 [1], clause 4.1.2), for the 450 MHz (25 dBm) in
C.S0011-C [4] and for the 2 110 MHz (24 dBm) in TS 125 104 [5].
NOTE 2: Conformance to the power limits shown in table 2 should not be interpreted as conformance of
e.i.r.p. authorization limits as defined in the CEPT/ECC/DEC/(06)07 [14].
4.2.3.2 NCU power flatness
4.2.3.2.1 Definition
The power flatness is the variation of the power over each operating frequency band.
4.2.3.2.2 Limits
The power flatness shall be within ±3 dB over each operating frequency band.
4.2.4 GSMOBA Transmitter Performance
4.2.4.1 Unwanted emissions in the out-of-band domain
4.2.4.1.1 Definition
Unwanted emissions in the out-of-band domain are defined as the unwanted emissions outside the channel bandwidth
resulting from the modulation process and non-linearity of the power amplifier in the transmitter and exclude the
spurious emissions.
4.2.4.1.2 Limits
Out-of-band emission power spectral density measured in 100 kHz bandwidth shall be attenuated relative to the
maximum power spectral density in each operating frequency band by the minimum attenuation values and for the
frequency bands in table 3.
Table 3: Frequency parameters
6 dB minimum attenuation 25 dB minimum attenuation 45 dB minimum attenuation
Lower Upper Lower band Upper band Lower band Upper band Lower band Upper band
band limit band limit limit fc- limit fc+ limit fc- limit fc+ limit fc- limit fc+
f1 f2 Bw*58 % Bw*58 % Bw*75 % Bw*75 % Bw*250 % Bw*250 %
(MHz) (MHz) (MHz) (MHz) (MHz) (MHz) (MHz) (MHz)
460 470 459,2 470,8 457,5 472,5 440 490
921 960 917,88 963,12 911,25 969,75 843 1 038
1 805 1 880 1 799,0 1 886,0 1 786,25 1 898,75 1 665 2 030
2 110 2 170 2 105,2 2 174,8 2 095 2 185 1 990 2 290
ETSI
15 Final draft ETSI EN 302 480 V1.1.2 (2008-02)
4.2.4.2 Unwanted emissions in the spurious domain
4.2.4.2.1 Definition
Unwanted emissions in the spurious domain are emissions at frequencies, other than those of the transmitter carrier and
sidebands associated with normal modulation at the adjacent frequencies.
4.2.4.2.2 Limits
The maximum power shall not exceed:
1) when the system is in standby state:
- -57 dBm for 30 MHz ≤ f ≤ 1 GHz in 100 kHz bandwidth;
- -47 dBm for 1 GHz < f ≤12,75 GHz in 1 MHz bandwidth;
2) when the system is in active state:
- -36 dBm for 30 MHz ≤ f ≤ 1 GHz in 100 kHz bandwidth;
- -30 dBm for 1 GHz < f ≤ 12,75 GHz in 1 MHz bandwidth.
NOTE: The frequency boundary and the detailed transitions of the limits between the requirement for out band
emissions and spectrum emissions are based on CEPT/ERC/REC 74-01 [15].
4.2.4.3 Cessation of emissions
4.2.4.3.1 Definition
When the GSMOBA system is in the active state and a condition to the altitude and the geographical position of the
aircraft requiring cessation of emissions occurs, the GSMOBA system shall automatically cease transmissions and enter
into the standby state.
4.2.4.3.2 Specification
When in the active state a condition to the altitude and the geographical position of the aircraft requiring cessation of
emissions occurs, the GSMOBA system shall cease transmissions as described in figure 1 contained in clause 4.1.2 and
enters the standby state.
5 Testing for compliance with technical requirements
5.1 Interpretation of results and measurement uncertainty
5.1.1 Environmental conditions for testing
Tests defined in the present document shall be carried out at representative points within the boundary limits of the
declared operational environmental profile (see clause B.3).
Where the technical performance varies subject to environmental conditions, tests shall be carried out under a sufficient
variety of environmental conditions (within the boundary limits of the declared operational environmental profile) to
give confidence of compliance to the associated technical requirements.
ETSI
16 Final draft ETSI EN 302 480 V1.1.2 (2008-02)
5.1.2 Interpretation of the measurement results
The interpretation of the measurement results recorded in a test report for the compliance testing described in the
present document shall be as follows:
- the measured value related to the corresponding limit shall be used to decide whether an equipment meets the
requirements of the present document;
- the value of the measurement uncertainty for the measurement of each parameter shall be included in the test
report;
- the recorded value of the measurement uncertainty shall be, for each measurement, equal to or better than the
figures in table 4.
For the test methods, according to the present document, the measurement uncertainty figures shall be calculated in
accordance with TR 100 028-1 [6] and shall correspond to an expansion factor (coverage factor) k = 1,96 or k = 2
(which provide confidence levels of respectively 95 % and 95,45 % in the case where the distributions characterizing
the actual measurement uncertainties are normal (Gaussian)). Table 4 is based on such expansion factors.
Table 4: Maximum measurement uncertainty
Parameter Maximum
measurement
uncertainty
Temperature ±1 K
Humidity ±5 %
-7
Radio Frequency tolerance
±1 x 10
Conducted power ±0,75 dB
OBTS output power ±2 dB
OBTS spectrum due to modulation and wideband noise ±2 dB
OBTS spectrum due to switching transients ±1,5 dB
OBTS reference sensivity level ±3 dB
OBTS spurious emissions from the receiver antenna connector ±3 dB
NCU mean power spectral density ±3 dB
NCU power flatness ±3 dB
GSMOBA out-of-band e
...
Harmonized European Standard (Telecommunications series)
Electromagnetic compatibility
and Radio spectrum Matters (ERM);
Harmonized EN for the GSM onboard aircraft system
covering the essential requirements
of Article 3.2 of the R&TTE Directive
2 ETSI EN 302 480 V1.1.2 (2008-04)
Reference
DEN/ERM-GSMOBA-001
Keywords
GSM
ETSI
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ETSI
3 ETSI EN 302 480 V1.1.2 (2008-04)
Contents
Intellectual Property Rights.6
Foreword.6
Introduction .6
1 Scope.7
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.9
4 Technical requirements specifications .10
4.1 General.10
4.1.1 Environmental profile.10
4.1.2 GSMOBA system states .11
4.2 Conformance requirements.12
4.2.1 OBTS Transmitter Performance.12
4.2.1.1 OBTS maximum output power .12
4.2.1.1.1 Definition.12
4.2.1.1.2 Limits.12
4.2.1.2 OBTS Output RF spectrum.12
4.2.1.2.1 Spectrum due to modulation and wideband noise .12
4.2.1.2.2 Spectrum due to switching transients .12
4.2.1.3 OBTS Radio Frequency Tolerance .13
4.2.1.3.1 Definition.13
4.2.1.3.2 Limits.13
4.2.1.4 OBTS controlled MS RF power.13
4.2.1.4.1 Definition.13
4.2.1.4.2 Limits.13
4.2.2 OBTS Receiver Performance.13
4.2.2.1 OBTS Reference Sensitivity Level .13
4.2.2.1.1 Definition.13
4.2.2.1.2 Limits.13
4.2.2.2 Unwanted emissions in the spurious domain .14
4.2.2.2.1 Definition.14
4.2.2.2.2 Limits.14
4.2.3 NCU Transmitter Performance.14
4.2.3.1 NCU maximum mean power spectral density.14
4.2.3.1.1 Definition.14
4.2.3.1.2 Limits.14
4.2.3.2 NCU power flatness.14
4.2.3.2.1 Definition.14
4.2.3.2.2 Limits.14
4.2.4 GSMOBA Transmitter Performance .14
4.2.4.1 Unwanted emissions in the out-of-band domain.14
4.2.4.1.1 Definition.14
4.2.4.1.2 Limits.15
4.2.4.2 Unwanted emissions in the spurious domain .15
4.2.4.2.1 Definition.15
4.2.4.2.2 Limits.15
4.2.4.3 Cessation of emissions .15
4.2.4.3.1 Definition.15
4.2.4.3.2 Specification.15
5 Testing for compliance with technical requirements.16
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4 ETSI EN 302 480 V1.1.2 (2008-04)
5.1 Interpretation of results and measurement uncertainty.16
5.1.1 Environmental conditions for testing.16
5.1.2 Interpretation of the measurement results.16
5.1.3 Measurement options.17
5.2 Essential radio test suites.17
5.2.1 OBTS Transmitter Performance.17
5.2.1.1 OBTS Output power .17
5.2.1.1.1 Test purpose .17
5.2.1.1.2 Test case.17
5.2.1.2 OBTS RF spectrum.17
5.2.1.2.1 Spectrum due to modulation and wideband noise .17
5.2.1.2.2 Spectrum due to switching transients .18
5.2.1.3 OBTS Radio Frequency Tolerance .18
5.2.1.3.1 Test purpose .18
5.2.1.3.2 Test case.18
5.2.1.4 OBTS controlled MS RF power.18
5.2.1.4.1 Test purpose .18
5.2.1.4.2 Methods of measurement.18
5.2.2 OBTS Receiver Performance.19
5.2.2.1 OBTS Reference Sensitivity Level .19
5.2.2.1.1 Test Purpose .19
5.2.2.1.2 Test Case.20
5.2.2.2 Unwanted emissions in the spurious domain .20
5.2.2.2.1 Test Purpose .20
5.2.2.2.2 Test Case.20
5.2.3 NCU Transmitter Performance.20
5.2.3.1 NCU maximum mean power spectral density.20
5.2.3.1.1 Test purpose .20
5.2.3.1.2 Methods of measurement.20
5.2.3.2 NCU power flatness.21
5.2.3.2.1 Test purpose .21
5.2.3.2.2 Methods of measurement.21
5.2.4 GSMOBA Transmitter Performance .22
5.2.4.1 Unwanted emissions in the out-of band domain .22
5.2.4.1.1 Test purpose .22
5.2.4.1.2 Methods of measurement.22
5.2.4.1.2.1 Unwanted emissions in the out-of-band domain when OBTS is in standby state.22
5.2.4.1.2.2 Unwanted emissions in the out-of-band domain when OBTS is in active state.23
5.2.4.2 Unwanted emissions in the spurious domain .23
5.2.4.2.1 Test purpose .23
5.2.4.2.2 Methods of measurement.23
5.2.4.2.2.1 Unwanted emissions in the spurious domain when system is in standby state .24
5.2.4.2.2.2 Unwanted emissions in the spurious domain when system is in active state .24
5.2.4.3 Cessation of emissions .24
5.2.4.3.1 Test purpose .24
5.2.4.3.2 Methods of measurement.25
Annex A (normative): HS Requirements and conformance Test specifications Table (HS-
RTT).26
Annex B (normative): Environmental conditions .28
B.1 General.28
B.2 Environmental conformance requirements.28
B.3 Environmental test conditions.28
Annex C (informative): System Description .29
C.1 High level System Description.29
C.2 OBTS.30
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5 ETSI EN 302 480 V1.1.2 (2008-04)
C.3 RF Screening.30
C.4 Dedicated antenna system .30
C.5 Dedicated antenna installation.31
Annex D (informative): The EN title in the official languages .32
Annex E (informative): Bibliography.33
History .34
ETSI
6 ETSI EN 302 480 V1.1.2 (2008-04)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
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 Harmonized European Standard (Telecommunications series) has been produced by ETSI Technical Committee
Electromagnetic compatibility and Radio spectrum Matters (ERM).
The present document has been produced by ETSI in response to a mandate from the European Commission issued
under Council Directive 98/34/EC [12] (as amended) laying down a procedure for the provision of information in the
field of technical standards and regulations.
The present document is intended to become a Harmonized Standard, the reference of which will be published in the
Official Journal of the European Communities referencing the Directive 1999/5/EC [11] of the European Parliament
and of the Council of 9 March 1999 on radio equipment and telecommunications terminal equipment and the mutual
recognition of their conformity ("the R&TTE Directive").
Technical specifications relevant to Directive 1999/5/EC [11] are given in annex A.
National transposition dates
Date of adoption of this EN: 11 April 2008
Date of latest announcement of this EN (doa): 31 July 2008
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 January 2009
Date of withdrawal of any conflicting National Standard (dow): 31 January 2010
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 R&TTE Directive. The modular
structure is shown in EG 201 399 [13].
ETSI
7 ETSI EN 302 480 V1.1.2 (2008-04)
1 Scope
The present document applies to a system comprising the following radio equipment types:
1) an Onboard GSM Base Transceiver System (OBTS) supporting the GSM 1800 functions with specific
protocols for power constraints;
2) a Network Control Unit (NCU) preventing direct connection of the onboard mobile terminals with mobile
networks on the ground by raising the noise floor in the cabin.
These radio equipment types are capable of operating in all or any part of the frequency bands given below:
Table 1: Radiocommunications service frequency bands
Radiocommunications service frequency bands
Transmit 1 (OBTS) 1 805 MHz to 1 880 MHz
Receive 1 (OBTS) 1 710 MHz to 1 785 MHz
Transmit 2 (NCU) 460 MHz to 470 MHz
Transmit 2 (NCU) 921 MHz to 960 MHz
Transmit 2 (NCU) 1 805 MHz to 1 880 MHz
Transmit 2 (NCU) 2 110 MHz to 2 170 MHz
It applies to equipment for continuous and discontinuous transmission of data and digital speech.
The present document applies only to radio equipment using a dedicated transmitting antenna that is designed as an
indispensable part of the system for usage on board an aircraft.
The system covered by the present document operates in accordance with the operational requirements as outlined in
the Decision CEPT/ECC/DEC/(06)07 [14].
The present document covers the provisions of Directive 1999/5/EC (the R&TTE Directive), Article 3.2, which states
that "…. radio equipment shall be so constructed that it effectively uses the spectrum allocated to terrestrial/space radio
communications and orbital resources so as 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 R&TTE Directive may apply to equipment within the scope of the present
document.
NOTE: A list of such ENs is included on the web site http://www.newapproach.org.
The present document does not cover equipment compliance with relevant civil aviation regulations. In this respect, a
GSMOBA system, for its installation and operation on board an aircraft is subject to additional national or international
civil aviation airworthiness certification requirements, for example to EUROCAE ED-14E [10].
ETSI
8 ETSI EN 302 480 V1.1.2 (2008-04)
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] ETSI TS 145 005: "Digital cellular telecommunications system (Phase 2+); Radio transmission
and reception (3GPP TS 45.005 version 6.14.0 Release 6)".
[2] ETSI TS 145 010: "Digital cellular telecommunications system (Phase 2+); Radio subsystem
synchronization (3GPP TS 45.010 version 6.6.0 Release 6)".
[3] ETSI TS 145 008: "Digital cellular telecommunications system (Phase 2+); Radio subsystem link
control (3GPP TS 45.008 version 6.19.0 Release 6)".
[4] 3GPP2 C.S0011-C (V2.0): "Recommended Minimum Performance Standards for cdma2000
Spread Spectrum Mobile Stations".
NOTE: http://www.3gpp2.org/Public_html/specs/C.S0011-C_v2.0_060315.pdf
[5] ETSI TS 125 104: "Universal Mobile Telecommunications System (UMTS); Base Station (BS)
radio transmission and reception (FDD) (3GPP TS 25.104 version 6.16.0 Release 6)".
[6] ETSI TR 100 028 (all parts) (V1.4.1): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Uncertainties in the measurement of mobile radio equipment characteristics".
[7] ETSI TS 151 021: "Digital cellular telecommunications system (Phase 2+); Base Station System
(BSS) equipment specification; Radio aspects (3GPP TS 51.021 version 6.3.0 Release 6)".
[8] ETSI TS 145 004: "Digital cellular telecommunications system (Phase 2+); Modulation
(3GPP TS 45.004 version 6.0.0 Release 6)".
[9] CISPR 16-2-1 (2005): "Specification for radio disturbance and immunity measuring apparatus and
methods - Part 2-1: Methods of measurement of disturbances and immunity - Conducted
disturbance measurements".
ETSI
9 ETSI EN 302 480 V1.1.2 (2008-04)
[10] EUROCAE ED-14E (2005) (Equivalent to RTCA DO-160E): "Environmental Conditions and Test
Procedures for Airborne Equipment".
2.2 Informative references
The following referenced documents are not essential to the use of the present document but they assist the user with
regard to a particular subject area. For non-specific references, the latest version of the referenced document (including
any amendments) applies.
[11] Directive 1999/5/EC of the European Parliament and of the Council of 9 March 1999 on radio
equipment and telecommunications terminal equipment and the mutual recognition of their
conformity (R&TTE Directive).
[12] Directive 98/34/EC of the European Parliament and of the Council of 22 June 1998 laying down a
procedure for the provision of information in the field of technical standards and regulations.
[13] ETSI EG 201 399 (V2.1.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
A guide to the production of candidate Harmonized Standards for application under the R&TTE
Directive".
[14] CEPT/ECC/DEC/(06)07: "ECC Decision of 1 December 2006 on the harmonized use of airborne
GSM systems in the frequency bands 1710-1785 and 1805-1880 MHz".
[15] CEPT/ERC/REC 74-01 (2005) (equivalent to ITU-R Recommendation SM.329-10): "Unwanted
emissions in the spurious domain".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
Base Station System Test Equipment (BSSTE): functional tool for the purpose of acceptance testing of GSM Base
Station Systems
NOTE: The BSSTE functionally carries out all tests described in the OBTS specification.
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
GSM onboard aircraft system: system comprising the functions provided by the NCU and the OBTS
Network Control Unit (NCU): component of the GSM onboard aircraft system preventing direct connection of the
onboard mobile terminals with mobile networks on the ground by raising the noise floor in the cabin
Onboard Base Transceiver Station (OBTS): component of the GSM onboard aircraft system responsible for radio
transmission and reception to or from the onboard mobile terminals
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ACU Antenna Coupler Unit
AGL Above Ground Level
BER Bit Error Rate
BCCH Broadcast Control CHannel
BLER Block Error Rate
BSSTE Base Station System Test Equipment
BTS Base Transceiver Station
ETSI
10 ETSI EN 302 480 V1.1.2 (2008-04)
dB decibel
dBm decibel relative to 1 mW
DTM Dual Transfer Mode
e.i.r.p. equivalent isotropically radiated power
ECC Electronic Communications Committee
FER Frame Error Rate
GGW Ground GateWay
GPRS General Packet Radio Service
GSM Global System for Mobile communications
GSMOBA GSM OnBoard Aircraft
MS Mobile Station
MSC Mobile Switching Centre
NCU Network Control Unit
OBTS Onboard Base Transceiver Station
PBCCH Packet Broadcast Control CHannel
R&TTE Radio and Telecommunications Terminal Equipment
RACH Random Access CHannel
RBER Residual BER
RBW Resolution BandWidth
RF Radio Frequency
rms root mean square
SGSN Serving GPRS Support Node
STE Special Test Equipment
TCH Traffic CHannel
VBW Video BandWidth
4 Technical requirements specifications
4.1 General
4.1.1 Environmental profile
The technical requirements of the present document apply under the environmental profile for operation of the
equipment, which shall be declared by the supplier. The equipment shall comply with all the technical requirements of
the present document at all times when operating within the boundary limits of the declared operational environmental
profile and for the environmental conditions (as specified in clause B.3).
ETSI
11 ETSI EN 302 480 V1.1.2 (2008-04)
4.1.2 GSMOBA system states
Figure 1 represents the state diagram of the GSMOBA system.
Figure 1: State diagram of GSMOBA system
When the NCU function of the GSMOBA system is in NCU Active state the Transmitter of the NCU is powered up,
whereas when the NCU function of the GSMOBA system is in NCU Standby state the Transmitter of the NCU is
powered down.
When the OBTS function of the GSMOBA system is in OBTS Active state the Transmitter of the OBTS is powered up,
whereas when the OBTS function of the GSMOBA system is in OBTS Standby state the Transmitter of the OBTS is
powered down.
When the GSMOBA system is in Active state, both the OBTS and the NCU are in Active state, whereas when the
GSMOBA system is in Standby state, both OBTS and NCU are in Standby state.
The NCU function for the relevant frequency band(s) of the GSMOBA system is allowed to enter the "Active" state
after take-off or to remain in the "Active" state during the flight only when the regulatory conditions for the service
operation as authorized by the regulatory administration of the country passed over are satisfied.
The OBTS function of the GSMOBA system is allowed to enter the "Active" state after the take-off or to remain in the
"Active" state during the flight only when the regulatory condition for the service operation as authorized by the
regulatory administration of the country passed over are satisfied and proper NCU initialization has been reached. The
OBTS function is not allowed to be in the "Active" state unless the NCU function is also in the "Active" state.
The OBTS function of the GSMOBA system enters the "Standby" state:
• when the aircraft reaches during the descend phase the regulatory condition as authorized by the regulatory
administration of the country/countries passed over when approaching the airport, or
• before the aircraft enters into the airspace of a country whose regulatory administration does not allow the use
of GSMOBA services in the airspace above its territory.
ETSI
12 ETSI EN 302 480 V1.1.2 (2008-04)
The NCU function of the GSMOBA system enters the "Standby" state after the OBTS has entered the "Standby" state
and:
• when the aircraft reaches during the descend phase the regulatory condition as authorized by the regulatory
administration of the country/countries passed over when approaching the airport; or
• before the aircraft enters into the airspace of a country whose regulatory administration does not allow the use
of GSMOBA services in the airspace above its territory.
4.2 Conformance requirements
4.2.1 OBTS Transmitter Performance
4.2.1.1 OBTS maximum output power
4.2.1.1.1 Definition
Output power refers to the measure of the power when averaged over the useful part of the burst (see clause 4.1.2 of
TS 145 005 [1]).
4.2.1.1.2 Limits
The limit for the OBTS maximum output power shall conform to the maximum limit in clause 4.1.2 of TS 145 005 [1]
for the DCS 1800 BTS power class P1 (pico BTS).
NOTE: Conformance to the power limits in clause 4.1.2 of TS 145 005 [1] for the BTS power class P1 should not
be interpreted as conformance of e.i.r.p. authorization limits as defined in the
CEPT/ECC/DEC/(06)07 [14].
4.2.1.2 OBTS Output RF spectrum
4.2.1.2.1 Spectrum due to modulation and wideband noise
4.2.1.2.1.1 Definition
The spectrum due to modulation and wideband noise is the spectral spread caused by the modulation process in the
transmitter.
4.2.1.2.1.2 Limits
The limit for the OBTS output RF modulation spectrum shall conform to the limits in clause 4.2.1 of TS 145 005 [1] for
the applicable DCS 1800 BTS power class P1 (pico BTS).
4.2.1.2.2 Spectrum due to switching transients
4.2.1.2.2.1 Definition
The spectrum due to switching transients is the undesirable spectrum components in the transmission if the RF power is
ramped too quickly.
4.2.1.2.2.2 Limits
The limit for the OBTS RF switching transients spectrum shall conform to the limits in clause 4.2.2 of TS 145 005 [1]
for the applicable DCS 1800 BTS.
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13 ETSI EN 302 480 V1.1.2 (2008-04)
4.2.1.3 OBTS Radio Frequency Tolerance
4.2.1.3.1 Definition
The radio frequency tolerance of the transmitter is the difference between the unmodulated carrier frequency and the
nominal frequency selected for the test.
4.2.1.3.2 Limits
The limit for the radio frequency tolerance shall conform to the limits in clause 5.1 of TS 145 010 [2] for the applicable
DCS 1800 BTS power class P1 (pico BTS).
4.2.1.4 OBTS controlled MS RF power
4.2.1.4.1 Definition
When an MS is switched on, it first scans its RF environment, then selects one GSM cell to camp on and then decodes
the System Information transmitted on the BCCH channel of that cell. One of the parameters
(MS_TXPWR_MAX_CCH) contained in the System Information (SI3) indicates to MS the maximum transmit power
level that can be used by an MS during the initial access.
4.2.1.4.2 Limits
The following parameters shall be set to the power control level 15 i.e. 0 dBm as stated for DCS 1800 MS
(TS 145 005 [1], clause 4.1.1):
- MS_TXPWR_MAX_CCH;
- POWER_LEVEL; and
- GPRS_MS_TXPWR_MAX_CCH (if PBCCH is implemented).
POWER OFFSET shall be set to the value "0" i.e. 0 dB (TS 145 008 [3], clause 9 only applicable for class 3
DCS1800 MS).
4.2.2 OBTS Receiver Performance
4.2.2.1 OBTS Reference Sensitivity Level
4.2.2.1.1 Definition
The static reference sensitivity level of the receiver is the level of signal at the receiver input with a standard test signal
at which the receiver will produce after demodulation and channel decoding data with a Frame Erasure Ratio (FER),
Residual Bit Error Ratio (RBER) Bit Error Ratio (BER) or Block Error Ratio (BLER) better than or equal to that
specified for a specific logical channel type under static propagation conditions.
4.2.2.1.2 Limits
The limit for the OBTS reference sensivity level shall conform to the limits in clause 6.2 of TS 145 005 [1] for the
applicable DCS 1800 BTS power class P1 (pico BTS).
ETSI
14 ETSI EN 302 480 V1.1.2 (2008-04)
4.2.2.2 Unwanted emissions in the spurious domain
4.2.2.2.1 Definition
Unwanted emissions in the spurious domain are emissions at frequencies, other than those of the transmitter carrier and
sidebands associated with normal modulation at the adjacent frequencies.
4.2.2.2.2 Limits
The limit for the spurious emissions for the OBTS Receiver shall conform to the limits in clause 5.4 of TS 145 005 [1].
4.2.3 NCU Transmitter Performance
4.2.3.1 NCU maximum mean power spectral density
4.2.3.1.1 Definition
The mean power spectral density for a given reference bandwidth represents the ratio of the mean value of the measured
power over the reference bandwidth and the reference bandwidth itself.
4.2.3.1.2 Limits
The maximum mean power spectral density shall not exceed the value contained in table 2.
Table 2: Power spectral density limit
Frequency band (MHz) 460 to 470 921 to 960 1 805 to 1 880 2 110 to 2 170
Reference bandwidth 1,25 MHz 200 kHz 200 kHz 3,84 MHz
Power (dBm within
25 20 23 24
reference bandwidth)
NOTE 1: The values for frequency bands 900 MHz (20 dBm) and 1 800 MHz (23 dBm) have been taken from the
upper limit of the power class P1 (see TS 145 005 [1], clause 4.1.2), for the 450 MHz (25 dBm) in
C.S0011-C [4] and for the 2 110 MHz (24 dBm) in TS 125 104 [5].
NOTE 2: Conformance to the power limits shown in table 2 should not be interpreted as conformance of
e.i.r.p. authorization limits as defined in the CEPT/ECC/DEC/(06)07 [14].
4.2.3.2 NCU power flatness
4.2.3.2.1 Definition
The power flatness is the variation of the power over each operating frequency band.
4.2.3.2.2 Limits
The power flatness shall be within ±3 dB over each operating frequency band.
4.2.4 GSMOBA Transmitter Performance
4.2.4.1 Unwanted emissions in the out-of-band domain
4.2.4.1.1 Definition
Unwanted emissions in the out-of-band domain are defined as the unwanted emissions outside the channel bandwidth
resulting from the modulation process and non-linearity of the power amplifier in the transmitter and exclude the
spurious emissions.
ETSI
15 ETSI EN 302 480 V1.1.2 (2008-04)
4.2.4.1.2 Limits
Out-of-band emission power spectral density measured in 100 kHz bandwidth shall be attenuated relative to the
maximum power spectral density in each operating frequency band by the minimum attenuation values and for the
frequency bands in table 3.
Table 3: Frequency parameters
6 dB minimum attenuation 25 dB minimum attenuation 45 dB minimum attenuation
Lower Upper Lower band Upper band Lower band Upper band Lower band Upper band
band limit band limit limit fc- limit fc+ limit fc- limit fc+ limit fc- limit fc+
f1 f2 Bw*58 % Bw*58 % Bw*75 % Bw*75 % Bw*250 % Bw*250 %
(MHz) (MHz) (MHz) (MHz) (MHz) (MHz) (MHz) (MHz)
460 470 459,2 470,8 457,5 472,5 440 490
921 960 917,88 963,12 911,25 969,75 843 1 038
1 805 1 880 1 799,0 1 886,0 1 786,25 1 898,75 1 665 2 030
2 110 2 170 2 105,2 2 174,8 2 095 2 185 1 990 2 290
4.2.4.2 Unwanted emissions in the spurious domain
4.2.4.2.1 Definition
Unwanted emissions in the spurious domain are emissions at frequencies, other than those of the transmitter carrier and
sidebands associated with normal modulation at the adjacent frequencies.
4.2.4.2.2 Limits
The maximum power shall not exceed:
1) when the system is in standby state:
- -57 dBm for 30 MHz ≤ f ≤ 1 GHz in 100 kHz bandwidth;
- -47 dBm for 1 GHz < f ≤12,75 GHz in 1 MHz bandwidth;
2) when the system is in active state:
- -36 dBm for 30 MHz ≤ f ≤ 1 GHz in 100 kHz bandwidth;
- -30 dBm for 1 GHz < f ≤ 12,75 GHz in 1 MHz bandwidth.
NOTE: The frequency boundary and the detailed transitions of the limits between the requirement for out band
emissions and spectrum emissions are based on CEPT/ERC/REC 74-01 [15].
4.2.4.3 Cessation of emissions
4.2.4.3.1 Definition
When the GSMOBA system is in the active state and a condition to the altitude and the geographical position of the
aircraft requiring cessation of emissions occurs, the GSMOBA system shall automatically cease transmissions and enter
into the standby state.
4.2.4.3.2 Specification
When in the active state a condition to the altitude and the geographical position of the aircraft requiring cessation of
emissions occurs, the GSMOBA system shall cease transmissions as described in figure 1 contained in clause 4.1.2 and
enters the standby state.
ETSI
16 ETSI EN 302 480 V1.1.2 (2008-04)
5 Testing for compliance with technical requirements
5.1 Interpretation of results and measurement uncertainty
5.1.1 Environmental conditions for testing
Tests defined in the present document shall be carried out at representative points within the boundary limits of the
declared operational environmental profile (see clause B.3).
Where the technical performance varies subject to environmental conditions, tests shall be carried out under a sufficient
variety of environmental conditions (within the boundary limits of the declared operational environmental profile) to
give confidence of compliance to the associated technical requirements.
5.1.2 Interpretation of the measurement results
The interpretation of the measurement results recorded in a test report for the compliance testing described in the
present document shall be as follows:
- the measured value related to the corresponding limit shall be used to decide whether an equipment meets the
requirements of the present document;
- the value of the measurement uncertainty for the measurement of each parameter shall be included in the test
report;
- the recorded value of the measurement uncertainty shall be, for each measurement, equal to or better than the
figures in table 4.
For the test methods, according to the present document, the measurement uncertainty figures shall be calculated in
accordance with TR 100 028-1 [6] and shall correspond to an expansion factor (coverage factor) k = 1,96 or k = 2
(which provide confidence levels of respectively 95 % and 95,45 % in the case where the distributions characterizing
the actual measurement uncertainties are normal (Gaussian)). Table 4 is based on such expansion factors.
Table 4: Maximum measurement uncertainty
Parameter Maximum
measurement
uncertainty
Temperature ±1 K
Humidity ±5 %
-7
Radio Frequency tolerance
±1 x 10
Conducted power ±0,75 dB
OBTS output power ±2 dB
OBTS spectrum due to modulation and wideband noise ±2 dB
OBTS spectrum due to switching transients ±1,5 dB
OBTS reference sensivity level ±3 dB
OBTS spurious emissions from the receiver antenna connector ±3 dB
NCU mean power spectral density ±3 dB
NCU power flatness ±3 dB
GSMOBA out-of-band emissio
...
SLOVENSKI STANDARD
01-september-2008
(OHNWURPDJQHWQD]GUXåOMLYRVWLQ]DGHYHY]YH]L]UDGLMVNLPVSHNWURP (50
+DUPRQL]LUDQL(1]DVLVWHPH*60QDOHWDOLKNL]DMHPDELVWYHQH]DKWHYHþOHQD
GLUHNWLYH5 77(
Electromagnetic compatibility and Radio spectrum Matters (ERM) - Harmonized EN for
the GSM onboard aircraft system covering essential requirements of Article 3.2 of the
R&TTE Directive
Ta slovenski standard je istoveten z: EN 302 480 Version 1.1.2
ICS:
33.060.99 Druga oprema za radijske Other equipment for
komunikacije radiocommunications
33.070.50 Globalni sistem za mobilno Global System for Mobile
telekomunikacijo (GSM) Communication (GSM)
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
Harmonized European Standard (Telecommunications series)
Electromagnetic compatibility
and Radio spectrum Matters (ERM);
Harmonized EN for the GSM onboard aircraft system
covering the essential requirements
of Article 3.2 of the R&TTE Directive
2 ETSI EN 302 480 V1.1.2 (2008-04)
Reference
DEN/ERM-GSMOBA-001
Keywords
GSM
ETSI
650 Route des Lucioles
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Sous-Préfecture de Grasse (06) N° 7803/88
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ETSI
3 ETSI EN 302 480 V1.1.2 (2008-04)
Contents
Intellectual Property Rights.6
Foreword.6
Introduction .6
1 Scope.7
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.9
4 Technical requirements specifications .10
4.1 General.10
4.1.1 Environmental profile.10
4.1.2 GSMOBA system states .11
4.2 Conformance requirements.12
4.2.1 OBTS Transmitter Performance.12
4.2.1.1 OBTS maximum output power .12
4.2.1.1.1 Definition.12
4.2.1.1.2 Limits.12
4.2.1.2 OBTS Output RF spectrum.12
4.2.1.2.1 Spectrum due to modulation and wideband noise .12
4.2.1.2.2 Spectrum due to switching transients .12
4.2.1.3 OBTS Radio Frequency Tolerance .13
4.2.1.3.1 Definition.13
4.2.1.3.2 Limits.13
4.2.1.4 OBTS controlled MS RF power.13
4.2.1.4.1 Definition.13
4.2.1.4.2 Limits.13
4.2.2 OBTS Receiver Performance.13
4.2.2.1 OBTS Reference Sensitivity Level .13
4.2.2.1.1 Definition.13
4.2.2.1.2 Limits.13
4.2.2.2 Unwanted emissions in the spurious domain .14
4.2.2.2.1 Definition.14
4.2.2.2.2 Limits.14
4.2.3 NCU Transmitter Performance.14
4.2.3.1 NCU maximum mean power spectral density.14
4.2.3.1.1 Definition.14
4.2.3.1.2 Limits.14
4.2.3.2 NCU power flatness.14
4.2.3.2.1 Definition.14
4.2.3.2.2 Limits.14
4.2.4 GSMOBA Transmitter Performance .14
4.2.4.1 Unwanted emissions in the out-of-band domain.14
4.2.4.1.1 Definition.14
4.2.4.1.2 Limits.15
4.2.4.2 Unwanted emissions in the spurious domain .15
4.2.4.2.1 Definition.15
4.2.4.2.2 Limits.15
4.2.4.3 Cessation of emissions .15
4.2.4.3.1 Definition.15
4.2.4.3.2 Specification.15
5 Testing for compliance with technical requirements.16
ETSI
4 ETSI EN 302 480 V1.1.2 (2008-04)
5.1 Interpretation of results and measurement uncertainty.16
5.1.1 Environmental conditions for testing.16
5.1.2 Interpretation of the measurement results.16
5.1.3 Measurement options.17
5.2 Essential radio test suites.17
5.2.1 OBTS Transmitter Performance.17
5.2.1.1 OBTS Output power .17
5.2.1.1.1 Test purpose .17
5.2.1.1.2 Test case.17
5.2.1.2 OBTS RF spectrum.17
5.2.1.2.1 Spectrum due to modulation and wideband noise .17
5.2.1.2.2 Spectrum due to switching transients .18
5.2.1.3 OBTS Radio Frequency Tolerance .18
5.2.1.3.1 Test purpose .18
5.2.1.3.2 Test case.18
5.2.1.4 OBTS controlled MS RF power.18
5.2.1.4.1 Test purpose .18
5.2.1.4.2 Methods of measurement.18
5.2.2 OBTS Receiver Performance.19
5.2.2.1 OBTS Reference Sensitivity Level .19
5.2.2.1.1 Test Purpose .19
5.2.2.1.2 Test Case.20
5.2.2.2 Unwanted emissions in the spurious domain .20
5.2.2.2.1 Test Purpose .20
5.2.2.2.2 Test Case.20
5.2.3 NCU Transmitter Performance.20
5.2.3.1 NCU maximum mean power spectral density.20
5.2.3.1.1 Test purpose .20
5.2.3.1.2 Methods of measurement.20
5.2.3.2 NCU power flatness.21
5.2.3.2.1 Test purpose .21
5.2.3.2.2 Methods of measurement.21
5.2.4 GSMOBA Transmitter Performance .22
5.2.4.1 Unwanted emissions in the out-of band domain .22
5.2.4.1.1 Test purpose .22
5.2.4.1.2 Methods of measurement.22
5.2.4.1.2.1 Unwanted emissions in the out-of-band domain when OBTS is in standby state.22
5.2.4.1.2.2 Unwanted emissions in the out-of-band domain when OBTS is in active state.23
5.2.4.2 Unwanted emissions in the spurious domain .23
5.2.4.2.1 Test purpose .23
5.2.4.2.2 Methods of measurement.23
5.2.4.2.2.1 Unwanted emissions in the spurious domain when system is in standby state .24
5.2.4.2.2.2 Unwanted emissions in the spurious domain when system is in active state .24
5.2.4.3 Cessation of emissions .24
5.2.4.3.1 Test purpose .24
5.2.4.3.2 Methods of measurement.25
Annex A (normative): HS Requirements and conformance Test specifications Table (HS-
RTT).26
Annex B (normative): Environmental conditions .28
B.1 General.28
B.2 Environmental conformance requirements.28
B.3 Environmental test conditions.28
Annex C (informative): System Description .29
C.1 High level System Description.29
C.2 OBTS.30
ETSI
5 ETSI EN 302 480 V1.1.2 (2008-04)
C.3 RF Screening.30
C.4 Dedicated antenna system .30
C.5 Dedicated antenna installation.31
Annex D (informative): The EN title in the official languages .32
Annex E (informative): Bibliography.33
History .34
ETSI
6 ETSI EN 302 480 V1.1.2 (2008-04)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
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 Harmonized European Standard (Telecommunications series) has been produced by ETSI Technical Committee
Electromagnetic compatibility and Radio spectrum Matters (ERM).
The present document has been produced by ETSI in response to a mandate from the European Commission issued
under Council Directive 98/34/EC [12] (as amended) laying down a procedure for the provision of information in the
field of technical standards and regulations.
The present document is intended to become a Harmonized Standard, the reference of which will be published in the
Official Journal of the European Communities referencing the Directive 1999/5/EC [11] of the European Parliament
and of the Council of 9 March 1999 on radio equipment and telecommunications terminal equipment and the mutual
recognition of their conformity ("the R&TTE Directive").
Technical specifications relevant to Directive 1999/5/EC [11] are given in annex A.
National transposition dates
Date of adoption of this EN: 11 April 2008
Date of latest announcement of this EN (doa): 31 July 2008
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 January 2009
Date of withdrawal of any conflicting National Standard (dow): 31 January 2010
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 R&TTE Directive. The modular
structure is shown in EG 201 399 [13].
ETSI
7 ETSI EN 302 480 V1.1.2 (2008-04)
1 Scope
The present document applies to a system comprising the following radio equipment types:
1) an Onboard GSM Base Transceiver System (OBTS) supporting the GSM 1800 functions with specific
protocols for power constraints;
2) a Network Control Unit (NCU) preventing direct connection of the onboard mobile terminals with mobile
networks on the ground by raising the noise floor in the cabin.
These radio equipment types are capable of operating in all or any part of the frequency bands given below:
Table 1: Radiocommunications service frequency bands
Radiocommunications service frequency bands
Transmit 1 (OBTS) 1 805 MHz to 1 880 MHz
Receive 1 (OBTS) 1 710 MHz to 1 785 MHz
Transmit 2 (NCU) 460 MHz to 470 MHz
Transmit 2 (NCU) 921 MHz to 960 MHz
Transmit 2 (NCU) 1 805 MHz to 1 880 MHz
Transmit 2 (NCU) 2 110 MHz to 2 170 MHz
It applies to equipment for continuous and discontinuous transmission of data and digital speech.
The present document applies only to radio equipment using a dedicated transmitting antenna that is designed as an
indispensable part of the system for usage on board an aircraft.
The system covered by the present document operates in accordance with the operational requirements as outlined in
the Decision CEPT/ECC/DEC/(06)07 [14].
The present document covers the provisions of Directive 1999/5/EC (the R&TTE Directive), Article 3.2, which states
that "…. radio equipment shall be so constructed that it effectively uses the spectrum allocated to terrestrial/space radio
communications and orbital resources so as 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 R&TTE Directive may apply to equipment within the scope of the present
document.
NOTE: A list of such ENs is included on the web site http://www.newapproach.org.
The present document does not cover equipment compliance with relevant civil aviation regulations. In this respect, a
GSMOBA system, for its installation and operation on board an aircraft is subject to additional national or international
civil aviation airworthiness certification requirements, for example to EUROCAE ED-14E [10].
ETSI
8 ETSI EN 302 480 V1.1.2 (2008-04)
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] ETSI TS 145 005: "Digital cellular telecommunications system (Phase 2+); Radio transmission
and reception (3GPP TS 45.005 version 6.14.0 Release 6)".
[2] ETSI TS 145 010: "Digital cellular telecommunications system (Phase 2+); Radio subsystem
synchronization (3GPP TS 45.010 version 6.6.0 Release 6)".
[3] ETSI TS 145 008: "Digital cellular telecommunications system (Phase 2+); Radio subsystem link
control (3GPP TS 45.008 version 6.19.0 Release 6)".
[4] 3GPP2 C.S0011-C (V2.0): "Recommended Minimum Performance Standards for cdma2000
Spread Spectrum Mobile Stations".
NOTE: http://www.3gpp2.org/Public_html/specs/C.S0011-C_v2.0_060315.pdf
[5] ETSI TS 125 104: "Universal Mobile Telecommunications System (UMTS); Base Station (BS)
radio transmission and reception (FDD) (3GPP TS 25.104 version 6.16.0 Release 6)".
[6] ETSI TR 100 028 (all parts) (V1.4.1): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Uncertainties in the measurement of mobile radio equipment characteristics".
[7] ETSI TS 151 021: "Digital cellular telecommunications system (Phase 2+); Base Station System
(BSS) equipment specification; Radio aspects (3GPP TS 51.021 version 6.3.0 Release 6)".
[8] ETSI TS 145 004: "Digital cellular telecommunications system (Phase 2+); Modulation
(3GPP TS 45.004 version 6.0.0 Release 6)".
[9] CISPR 16-2-1 (2005): "Specification for radio disturbance and immunity measuring apparatus and
methods - Part 2-1: Methods of measurement of disturbances and immunity - Conducted
disturbance measurements".
ETSI
9 ETSI EN 302 480 V1.1.2 (2008-04)
[10] EUROCAE ED-14E (2005) (Equivalent to RTCA DO-160E): "Environmental Conditions and Test
Procedures for Airborne Equipment".
2.2 Informative references
The following referenced documents are not essential to the use of the present document but they assist the user with
regard to a particular subject area. For non-specific references, the latest version of the referenced document (including
any amendments) applies.
[11] Directive 1999/5/EC of the European Parliament and of the Council of 9 March 1999 on radio
equipment and telecommunications terminal equipment and the mutual recognition of their
conformity (R&TTE Directive).
[12] Directive 98/34/EC of the European Parliament and of the Council of 22 June 1998 laying down a
procedure for the provision of information in the field of technical standards and regulations.
[13] ETSI EG 201 399 (V2.1.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
A guide to the production of candidate Harmonized Standards for application under the R&TTE
Directive".
[14] CEPT/ECC/DEC/(06)07: "ECC Decision of 1 December 2006 on the harmonized use of airborne
GSM systems in the frequency bands 1710-1785 and 1805-1880 MHz".
[15] CEPT/ERC/REC 74-01 (2005) (equivalent to ITU-R Recommendation SM.329-10): "Unwanted
emissions in the spurious domain".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
Base Station System Test Equipment (BSSTE): functional tool for the purpose of acceptance testing of GSM Base
Station Systems
NOTE: The BSSTE functionally carries out all tests described in the OBTS specification.
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
GSM onboard aircraft system: system comprising the functions provided by the NCU and the OBTS
Network Control Unit (NCU): component of the GSM onboard aircraft system preventing direct connection of the
onboard mobile terminals with mobile networks on the ground by raising the noise floor in the cabin
Onboard Base Transceiver Station (OBTS): component of the GSM onboard aircraft system responsible for radio
transmission and reception to or from the onboard mobile terminals
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ACU Antenna Coupler Unit
AGL Above Ground Level
BER Bit Error Rate
BCCH Broadcast Control CHannel
BLER Block Error Rate
BSSTE Base Station System Test Equipment
BTS Base Transceiver Station
ETSI
10 ETSI EN 302 480 V1.1.2 (2008-04)
dB decibel
dBm decibel relative to 1 mW
DTM Dual Transfer Mode
e.i.r.p. equivalent isotropically radiated power
ECC Electronic Communications Committee
FER Frame Error Rate
GGW Ground GateWay
GPRS General Packet Radio Service
GSM Global System for Mobile communications
GSMOBA GSM OnBoard Aircraft
MS Mobile Station
MSC Mobile Switching Centre
NCU Network Control Unit
OBTS Onboard Base Transceiver Station
PBCCH Packet Broadcast Control CHannel
R&TTE Radio and Telecommunications Terminal Equipment
RACH Random Access CHannel
RBER Residual BER
RBW Resolution BandWidth
RF Radio Frequency
rms root mean square
SGSN Serving GPRS Support Node
STE Special Test Equipment
TCH Traffic CHannel
VBW Video BandWidth
4 Technical requirements specifications
4.1 General
4.1.1 Environmental profile
The technical requirements of the present document apply under the environmental profile for operation of the
equipment, which shall be declared by the supplier. The equipment shall comply with all the technical requirements of
the present document at all times when operating within the boundary limits of the declared operational environmental
profile and for the environmental conditions (as specified in clause B.3).
ETSI
11 ETSI EN 302 480 V1.1.2 (2008-04)
4.1.2 GSMOBA system states
Figure 1 represents the state diagram of the GSMOBA system.
Figure 1: State diagram of GSMOBA system
When the NCU function of the GSMOBA system is in NCU Active state the Transmitter of the NCU is powered up,
whereas when the NCU function of the GSMOBA system is in NCU Standby state the Transmitter of the NCU is
powered down.
When the OBTS function of the GSMOBA system is in OBTS Active state the Transmitter of the OBTS is powered up,
whereas when the OBTS function of the GSMOBA system is in OBTS Standby state the Transmitter of the OBTS is
powered down.
When the GSMOBA system is in Active state, both the OBTS and the NCU are in Active state, whereas when the
GSMOBA system is in Standby state, both OBTS and NCU are in Standby state.
The NCU function for the relevant frequency band(s) of the GSMOBA system is allowed to enter the "Active" state
after take-off or to remain in the "Active" state during the flight only when the regulatory conditions for the service
operation as authorized by the regulatory administration of the country passed over are satisfied.
The OBTS function of the GSMOBA system is allowed to enter the "Active" state after the take-off or to remain in the
"Active" state during the flight only when the regulatory condition for the service operation as authorized by the
regulatory administration of the country passed over are satisfied and proper NCU initialization has been reached. The
OBTS function is not allowed to be in the "Active" state unless the NCU function is also in the "Active" state.
The OBTS function of the GSMOBA system enters the "Standby" state:
• when the aircraft reaches during the descend phase the regulatory condition as authorized by the regulatory
administration of the country/countries passed over when approaching the airport, or
• before the aircraft enters into the airspace of a country whose regulatory administration does not allow the use
of GSMOBA services in the airspace above its territory.
ETSI
12 ETSI EN 302 480 V1.1.2 (2008-04)
The NCU function of the GSMOBA system enters the "Standby" state after the OBTS has entered the "Standby" state
and:
• when the aircraft reaches during the descend phase the regulatory condition as authorized by the regulatory
administration of the country/countries passed over when approaching the airport; or
• before the aircraft enters into the airspace of a country whose regulatory administration does not allow the use
of GSMOBA services in the airspace above its territory.
4.2 Conformance requirements
4.2.1 OBTS Transmitter Performance
4.2.1.1 OBTS maximum output power
4.2.1.1.1 Definition
Output power refers to the measure of the power when averaged over the useful part of the burst (see clause 4.1.2 of
TS 145 005 [1]).
4.2.1.1.2 Limits
The limit for the OBTS maximum output power shall conform to the maximum limit in clause 4.1.2 of TS 145 005 [1]
for the DCS 1800 BTS power class P1 (pico BTS).
NOTE: Conformance to the power limits in clause 4.1.2 of TS 145 005 [1] for the BTS power class P1 should not
be interpreted as conformance of e.i.r.p. authorization limits as defined in the
CEPT/ECC/DEC/(06)07 [14].
4.2.1.2 OBTS Output RF spectrum
4.2.1.2.1 Spectrum due to modulation and wideband noise
4.2.1.2.1.1 Definition
The spectrum due to modulation and wideband noise is the spectral spread caused by the modulation process in the
transmitter.
4.2.1.2.1.2 Limits
The limit for the OBTS output RF modulation spectrum shall conform to the limits in clause 4.2.1 of TS 145 005 [1] for
the applicable DCS 1800 BTS power class P1 (pico BTS).
4.2.1.2.2 Spectrum due to switching transients
4.2.1.2.2.1 Definition
The spectrum due to switching transients is the undesirable spectrum components in the transmission if the RF power is
ramped too quickly.
4.2.1.2.2.2 Limits
The limit for the OBTS RF switching transients spectrum shall conform to the limits in clause 4.2.2 of TS 145 005 [1]
for the applicable DCS 1800 BTS.
ETSI
13 ETSI EN 302 480 V1.1.2 (2008-04)
4.2.1.3 OBTS Radio Frequency Tolerance
4.2.1.3.1 Definition
The radio frequency tolerance of the transmitter is the difference between the unmodulated carrier frequency and the
nominal frequency selected for the test.
4.2.1.3.2 Limits
The limit for the radio frequency tolerance shall conform to the limits in clause 5.1 of TS 145 010 [2] for the applicable
DCS 1800 BTS power class P1 (pico BTS).
4.2.1.4 OBTS controlled MS RF power
4.2.1.4.1 Definition
When an MS is switched on, it first scans its RF environment, then selects one GSM cell to camp on and then decodes
the System Information transmitted on the BCCH channel of that cell. One of the parameters
(MS_TXPWR_MAX_CCH) contained in the System Information (SI3) indicates to MS the maximum transmit power
level that can be used by an MS during the initial access.
4.2.1.4.2 Limits
The following parameters shall be set to the power control level 15 i.e. 0 dBm as stated for DCS 1800 MS
(TS 145 005 [1], clause 4.1.1):
- MS_TXPWR_MAX_CCH;
- POWER_LEVEL; and
- GPRS_MS_TXPWR_MAX_CCH (if PBCCH is implemented).
POWER OFFSET shall be set to the value "0" i.e. 0 dB (TS 145 008 [3], clause 9 only applicable for class 3
DCS1800 MS).
4.2.2 OBTS Receiver Performance
4.2.2.1 OBTS Reference Sensitivity Level
4.2.2.1.1 Definition
The static reference sensitivity level of the receiver is the level of signal at the receiver input with a standard test signal
at which the receiver will produce after demodulation and channel decoding data with a Frame Erasure Ratio (FER),
Residual Bit Error Ratio (RBER) Bit Error Ratio (BER) or Block Error Ratio (BLER) better than or equal to that
specified for a specific logical channel type under static propagation conditions.
4.2.2.1.2 Limits
The limit for the OBTS reference sensivity level shall conform to the limits in clause 6.2 of TS 145 005 [1] for the
applicable DCS 1800 BTS power class P1 (pico BTS).
ETSI
14 ETSI EN 302 480 V1.1.2 (2008-04)
4.2.2.2 Unwanted emissions in the spurious domain
4.2.2.2.1 Definition
Unwanted emissions in the spurious domain are emissions at frequencies, other than those of the transmitter carrier and
sidebands associated with normal modulation at the adjacent frequencies.
4.2.2.2.2 Limits
The limit for the spurious emissions for the OBTS Receiver shall conform to the limits in clause 5.4 of TS 145 005 [1].
4.2.3 NCU Transmitter Performance
4.2.3.1 NCU maximum mean power spectral density
4.2.3.1.1 Definition
The mean power spectral density for a given reference bandwidth represents the ratio of the mean value of the measured
power over the reference bandwidth and the reference bandwidth itself.
4.2.3.1.2 Limits
The maximum mean power spectral density shall not exceed the value contained in table 2.
Table 2: Power spectral density limit
Frequency band (MHz) 460 to 470 921 to 960 1 805 to 1 880 2 110 to 2 170
Reference bandwidth 1,25 MHz 200 kHz 200 kHz 3,84 MHz
Power (dBm within
25 20 23 24
reference bandwidth)
NOTE 1: The values for frequency bands 900 MHz (20 dBm) and 1 800 MHz (23 dBm) have been taken from the
upper limit of the power class P1 (see TS 145 005 [1], clause 4.1.2), for the 450 MHz (25 dBm) in
C.S0011-C [4] and for the 2 110 MHz (24 dBm) in TS 125 104 [5].
NOTE 2: Conformance to the power limits shown in table 2 should not be interpreted as conformance of
e.i.r.p. authorization limits as defined in the CEPT/ECC/DEC/(06)07 [14].
4.2.3.2 NCU power flatness
4.2.3.2.1 Definition
The power flatness is the variation of the power over each operating frequency band.
4.2.3.2.2 Limits
The power flatness shall be within ±3 dB over each operating frequency band.
4.2.4 GSMOBA Transmitter Performance
4.2.4.1 Unwanted emissions in the out-of-band domain
4.2.4.1.1 Definition
Unwanted emissions in the out-of-band domain are defined as the unwanted emissions outside the channel bandwidth
resulting from the modulation process and non-linearity of the power amplifier in the transmitter and exclude the
spurious emissions.
ETSI
15 ETSI EN 302 480 V1.1.2 (2008-04)
4.2.4.1.2 Limits
Out-of-band emission power spectral density measured in 100 kHz bandwidth shall be attenuated relative to the
maximum power spectral density in each operating frequency band by the minimum attenuation values and for the
frequency bands in table 3.
Table 3: Frequency parameters
6 dB minimum attenuation 25 dB minimum attenuation 45 dB minimum attenuation
Lower Upper Lower band Upper band Lower band Upper band Lower band Upper band
band limit band limit limit fc- limit fc+ limit fc- limit fc+ limit fc- limit fc+
f1 f2 Bw*58 % Bw*58 % Bw*75 % Bw*75 % Bw*250 % Bw*250 %
(MHz) (MHz) (MHz) (MHz) (MHz) (MHz) (MHz) (MHz)
460 470 459,2 470,8 457,5 472,5 440 490
921 960 917,88 963,12 911,25 969,75 843 1 038
1 805 1 880 1 799,0 1 886,0 1 786,25 1 898,75 1 665 2 030
2 110 2 170 2 105,2 2 174,8 2 095 2 185 1 990 2 290
4.2.4.2 Unwanted emissions in the spurious domain
4.2.4.2.1 Definition
Unwanted emissions in the spurious domain are emissions at frequencies, other than those of the transmitter carrier and
sidebands associated with normal modulation at the adjacent frequencies.
4.2.4.2.2 Limits
The maximum power shall not exceed:
1) when the system is in standby state:
- -57 dBm for 30 MHz ≤ f ≤ 1 GHz in 100 kHz bandwidth;
- -47 dBm for 1 GHz < f ≤12,75 GHz in 1 MHz bandwidth;
2) when the system is in active state:
- -36 dBm for 30 MHz ≤ f ≤ 1 GHz in 100 kHz bandwidth;
- -30 dBm for 1 GHz < f ≤ 12,75 GHz in 1 MHz bandwidth.
NOTE: The frequency boundary and the detailed transitions of the limits between the requirement for out band
emissions and spectrum emissions are based on CEPT/ERC/REC 74-01 [15].
4.2.4.3 Cessation of emissions
4.2.4.3.1 Definition
When the GSMOBA system is in the active state and a condition to the altitude and the geographical position of the
aircraft requiring cessation of emissions occurs, the GSMOBA system shall automatically cease transmissions and enter
into the standby state.
4.2.4.3.2 Specification
When in the active state a condition to the altitude and the geographical position of the aircraft requiring cessation of
emissions occurs, the GSMOBA system shall cease transmissions as described in figure 1 contained in clause 4.1.2 and
enters the standby state.
ETSI
16 ETSI EN 302 480 V1.1.2 (2008-04)
5 Testing for compliance with technical requirements
5.1 Interpretation of results and measurement uncertainty
5.1.1 Environmental conditions for testing
Tests defined in the present document shall be carried out at representative points within the boundary limits of the
declared operational environmental profile (see clause B.3).
Where the technical performance varies subject to environmental conditions, tests shall be carried out under a sufficient
variety of environmental conditions (within the boundary limits of the declared operational environmental profile) to
give confidence of compliance to the associated technical requirements.
5.
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