SIST EN 300 789:2000
(Main)ElectroMagnetic Compatibility and Radio Spectrum Matters (ERM); Terrestrial Flight Telecommunications System (TFTS); Avionic termination radio testing specification
General Information
- Abstract
To provide for testing methods of the phase 1 TFTS standard (speech services). A separate I-ETS (-05003), which needs further consideration, would deal with the facsimile & data services.
- Status
- Published
- Publication Date
- 31-Mar-2000
- Technical Committee
- RES - Radio equipment and systems
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Apr-2000
- Due Date
- 01-Apr-2000
- Completion Date
- 01-Apr-2000
Overview
SIST EN 300 789:2000 is a European standard developed by the Slovenski inštitut za standardizacijo (SIST) and aligned with ETSI EN 300 789 V1.1.1. It defines essential test methods for the avionic termination (AT) radio components of the Terrestrial Flight Telecommunications System (TFTS), specifically for phase 1 speech services. The standard ensures electromagnetic compatibility (EMC) and supports effective radio spectrum management, aiming to promote interoperability, performance, and minimization of radio interference in aviation telecommunication systems.
This standard addresses the measurement procedures needed to verify the radio-frequency characteristics, unwanted emissions, transmitter accuracy, and receiver sensitivity for avionic units operating in specified frequency ranges. While this document covers speech service testing, other services such as facsimile or data are considered separately through related standards.
Key Topics
- Electromagnetic Compatibility (EMC): Defines procedures for testing avionic equipment to assure compatibility with other electronic and radio systems onboard aircraft, and with external services sharing the radio spectrum.
- Radio Spectrum Management: Establishes requirements to ensure that avionic terminations do not interfere with neighboring radio services, either within the aircraft or externally.
- Frequency Ranges and Channels: AT receive: 1670–1675 MHz; AT transmit: 1800–1805 MHz. The standard defines specific radio channels and arrangements necessary for consistent operation and minimal interference.
- Testing Procedures:
- Protection of both the TFTS network and other spectrum users.
- Measurement of unwanted emissions (spurious and out-of-band) to ensure compliance with international limits.
- Assessment of transmitter output power, frequency error, and signal modulation accuracy.
- Evaluation of receiver sensitivity, including performance under co-channel and adjacent channel conditions.
- Environmental and Power Requirements: Specifies the acceptable ranges for temperature, humidity, and supply voltage to ensure reliable test results representative of real operating conditions.
- Test Apparatus and Methodology: Details standard test equipment, control software, and setup procedures to obtain consistent, reproducible results.
Applications
The primary applications of SIST EN 300 789:2000 include:
- Certification of Avionic Equipment: Manufacturers and certification labs use the testing procedures to verify compliance of TFTS avionic termination units, a prerequisite for installation in commercial or civil aircraft operating within the defined frequency bands.
- System Integration: Ensures that TFTS equipment from multiple manufacturers can be integrated into a single network without causing disruptive interference-crucial for airlines, avionics suppliers, and aircraft integrators.
- Regulatory Compliance: Helps organizations demonstrate conformance with European requirements for electromagnetic compatibility and radio spectrum usage, facilitating approval from regulatory authorities.
- Network Integrity and Safety: Protects both the TFTS network and external radio services from interference, contributing to safer and more reliable aircraft telecommunications.
Related Standards
For comprehensive system implementation and compliance, consider the following related standards:
- ETS 300 326-2: Radio Equipment and Systems (RES); Terrestrial Flight Telephone System (TFTS); Part 2: Speech services, radio interface – Specifies the foundational technical requirements for TFTS.
- ETR 028: Radio Equipment and Systems (RES); Uncertainties in the measurement of mobile radio equipment characteristics.
- ARINC 752: Terrestrial Flight Telephone System (TFTS) Airborne Radio Subsystem – Industry guidance for airborne TFTS equipment.
- EUROCAE ED-14C: Environmental Conditions and Test Procedures for Airborne Equipment – Relevant for environmental test conditions.
- ITU Radio Regulations: Defines international requirements for radio emissions and interference.
Summary
SIST EN 300 789:2000 is a critical standard for the testing and certification of avionic radio equipment in the Terrestrial Flight Telecommunications System. By ensuring electromagnetic compatibility, minimizing interference, and promoting interoperability, it supports the safe and effective operation of aeronautical public correspondence services in European airspace. For organizations engaged in aviation telecommunications, adherence to this standard is essential for product approval and operational reliability.
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Frequently Asked Questions
SIST EN 300 789:2000 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "ElectroMagnetic Compatibility and Radio Spectrum Matters (ERM); Terrestrial Flight Telecommunications System (TFTS); Avionic termination radio testing specification". This standard covers: To provide for testing methods of the phase 1 TFTS standard (speech services). A separate I-ETS (-05003), which needs further consideration, would deal with the facsimile & data services.
To provide for testing methods of the phase 1 TFTS standard (speech services). A separate I-ETS (-05003), which needs further consideration, would deal with the facsimile & data services.
SIST EN 300 789:2000 is classified under the following ICS (International Classification for Standards) categories: 33.060.99 - Other equipment for radiocommunications; 33.100.01 - Electromagnetic compatibility in general; 49.060 - Aerospace electric equipment and systems. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 300 789:2000 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.ElectroMagnetic Compatibility and Radio Spectrum Matters (ERM); Terrestrial Flight Telecommunications System (TFTS); Avionic termination radio testing specification49.060Aerospace electric equipment and systems33.100.01Elektromagnetna združljivost na splošnoElectromagnetic compatibility in general33.060.99Druga oprema za radijske komunikacijeOther equipment for radiocommunicationsICS:Ta slovenski standard je istoveten z:EN 300 789 Version 1.1.1SIST EN 300 789:2000en01-april-2000SIST EN 300 789:2000SLOVENSKI
STANDARD
European Telecommunications Standards Institute EN 300 789 V1.1.1 (1998-03)European Standard (Telecommunications series)Electromagnetic compatibilityand Radio spectrum Matters (ERM);Terrestrial Flight Telecommunications System (TFTS);Avionic termination radio testing specificationSIST EN 300 789:2000
EN 300 789 V1.1.1 (1998-03)2ReferenceDEN/ERM-RP05-01/4 (7b000ico.PDF)KeywordsRadio, testing, TFTSETSI SecretariatPostal addressF-06921 Sophia Antipolis Cedex - FRANCEOffice address650 Route des Lucioles - Sophia AntipolisValbonne - FRANCETel.: +33 4 92 94 42 00
Fax: +33 4 93 65 47 16Siret N° 348 623 562 00017 - NAF 742 CAssociation à but non lucratif enregistrée à laSous-Préfecture de Grasse (06) N° 7803/88Internetsecretariat@etsi.frhttp://www.etsi.frhttp://www.etsi.orgCopyright NotificationNo part may be reproduced except as authorized by written permission.The copyright and the foregoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1998.All rights reserved.SIST EN 300 789:2000
EN 300 789 V1.1.1 (1998-03)3ContentsIntellectual Property Rights.5Foreword.51Scope.62Normative references.63Definitions, abbreviations and symbols.63.1Definitions.63.2Abbreviations.73.3Symbols.74Frequency range and radio channel arrangement.74.1Frequency range.74.2Radio channel arrangement.74.3Modulation.85General aspects of TFTS testing procedures.95.1Protection of the TFTS network.95.2Protection of other services.95.3Access to signals.95.4Environmental conditions for tests.95.5Power supply requirements.96Tests of radio aspects of the physical layer.106.1General.106.1.1Documentation.106.1.2Limits for radio measurements for conformance testing.106.1.2.1Unwanted emissions.106.1.2.2Modulator and transmitter accuracy.106.1.2.3Frequency error.106.1.2.4Transmitter output power.106.1.2.5RF spectrum.106.1.2.6Receiver sensitivity without interferer.106.1.2.7Co-channel sensitivity.106.1.2.8Adjacent channel sensitivity.116.1.3Test apparatus.116.1.4AT testing facilities.116.1.4.1Direct control of AT.116.1.4.2Loopback facility.116.1.4.3Continuous modulation mode.126.1.4.3.1Test signals.126.1.4.4Suppressed modulation mode.126.1.4.5Standby mode.126.1.5Mean to peak ratio of p/4)DQPSK modulation.126.1.6Uncertainty in measurements.136.1.7Measurements made under continuous or burst modulation.136.1.8EMC.136.2Measurement of unwanted emissions.136.2.1General.136.2.2Reference documents and specification.136.2.2.1Out of band emissions.136.2.2.2Spurious emissions.136.2.3Purpose of the tests.146.2.4Method of measurement.146.2.4.1Out of band emissions.146.2.4.2Spurious emissions.146.2.5Test bank characteristics.14SIST EN 300 789:2000
EN 300 789 V1.1.1 (1998-03)46.2.6Measurement uncertainty.156.3Modulator and transmitter accuracy.156.3.1General.156.3.2Reference documents and specification.156.3.3Purpose of the test.156.3.4Method of measurement.166.3.5Test bank characteristics.166.3.6Measurement uncertainty.166.4Frequency error.166.4.1General.166.4.2Reference documents and specification.166.4.3Purpose of the test.166.4.4Method of measurement.166.4.5Test bank characteristics.176.4.6Measurement uncertainty.176.5Mean transmitter output power.176.5.1General.176.5.2Mean transmitter power output under continuous transmission.176.5.2.1Reference documents and specification.176.5.2.2Purpose of the test.176.5.2.3Method of measurement.186.5.2.4Test bank characteristics.186.5.2.5Measurement uncertainty.186.6RF spectrum mask.196.6.1General.196.6.2Reference documents and specification.196.6.3Purpose of the test.196.6.4Method of measurement.196.6.5Test bank characteristics.196.6.6Measurement uncertainty.206.7Receiver sensitivity.206.7.1General.206.7.2Receiver sensitivity with thermal noise.206.7.2.1Reference documents and specification.206.7.2.2Purpose of the test.206.7.2.3Method of measurement.206.7.2.4Test bank characteristics.216.7.2.5Measurement uncertainty.216.7.3Receiver sensitivity with in-band intermodulation products.216.7.3.1Reference documents and specification.216.7.3.2Purpose of the test.216.7.3.3Method of measurement.216.7.3.4Test bank characteristics.216.7.3.5Measurement uncertainty.226.8Co-channel and adjacent channel sensitivity.226.8.1General.226.8.2Reference document and specification.226.8.3Purpose of the test.236.8.4Method of measurement.236.8.5Test bank characteristics.236.8.6Measurement uncertainty.24History.25SIST EN 300 789:2000
EN 300 789 V1.1.1 (1998-03)5Intellectual Property RightsIPRs essential or potentially essential to the present document may have been declared to ETSI. The informationpertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be foundin ETR 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect ofETSI standards", which is available free of charge from the ETSI Secretariat. Latest updates are available on the ETSIWeb server (http://www.etsi.fr/ipr).Pursuant to the ETSI Interim IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. Noguarantee can be given as to the existence of other IPRs not referenced in ETR 314 (or the updates onhttp://www.etsi.fr/ipr) which are, or may be, or may become, essential to the present document.ForewordThe European Standard (Telecommunications series) has been produced by ETSI Technical Committee Electromagneticcompatibility and Radio spectrum Matters (ERM).National transposition datesDate of adoption of this EN:20 February 1998Date of latest announcement of this EN (doa):30 June 1998Date of latest publication of new National Standardor endorsement of this EN (dop/e):31 December 1998Date of withdrawal of any conflicting National Standard (dow):31 December 1998SIST EN 300 789:2000
EN 300 789 V1.1.1 (1998-03)61ScopeThe present document specifies the measurements to be made to test the radio characteristics of the Avionic Termination(AT) of the Terrestrial Flight Telecommunications System (TFTS), operating in the frequency bands 1 670 MHz to1 675 MHz (receive) and 1 800 MHz to 1 805 MHz (transmit), and designed according to ETS 300 326 -2 [1]. Thepresent document does not constitute a full Conformance Testing Specification for the TFTS AT.2Normative referencesReferences may be made to:a)specific versions of publications (identified by date of publication, edition number, version number, etc.), inwhich case, subsequent revisions to the referenced document do not apply; orb)all versions up to and including the identified version (identified by "up to and including" before the versionidentity); orc)all versions subsequent to and including the identified version (identified by "onwards" following the versionidentity); ord)publications without mention of a specific version, in which case the latest version applies.A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the samenumber.[1]ETS 300 326-2 (1996): "Radio Equipment and Systems (RES); Terrestrial Flight TelephoneSystem (TFTS); Part 2: Speech services, radio interface".[2]ETR 028: "Radio Equipment and Systems (RES); Uncertainties in the measurement of mobileradio equipment characteristics".[3]The Radio Regulations of the International Telecommunications Union (1993).[4]ARINC characteristic 752 (January 1993): "Terrestrial Flight Telephone System (TFTS) AirborneRadio Subsystem".[5]EUROCAE ED-14C: "Environmental Conditions and Test Procedures for Airborne Equipment".3Definitions, abbreviations and symbols3.1DefinitionsFor the purposes of the present document, the following definitions apply:out-of-band emission: Emission on a frequency or frequencies immediately outside the necessary bandwidth whichresults from the modulation process, but excluding spurious emissions.spurious emission: Emission on a frequency or frequencies which are outside the necessary bandwidth and the level ofwhich may be reduced without affecting the corresponding transmission of information. Spurious emissions includeharmonic emissions, parasitic emissions, intermodulation products and frequency conversion products, but excludeout-of-band emissions.unwanted emissions: Consist of spurious emissions and out-of-band emissions.necessary bandwidth: For a given class of emission, the width of the frequency band which is just sufficient to ensurethe transmission of information at the rate and with the quality required under specified conditions.occupied bandwidth: The width of a frequency band such that, below the lower and above the upper frequency limits,the mean powers emitted are each equal to a specified percentage P/2 of the total mean power of a given emission.SIST EN 300 789:2000
EN 300 789 V1.1.1 (1998-03)795% confidence level: 1,96 times the total standard deviation. Based on Student's t factor.continuous modulation mode: See subclause 6.1.4.3.suppressed modulation mode: See subclause 6.1.4.4.burst mode: Transmission with one or more of the four voice channels switched off.antenna port: The end of the diplexer to antenna cable that is connected to the antenna, see subclause 5.3.3.2AbbreviationsFor the purposes of the present document, the following abbreviations apply:p/4 DQPSKp/4 Differential Quaternary Phase Shift KeyingAPCAeronautical Public CorrespondenceAT Avionic TerminationBERBit Error Ratioc/icarrier to interference ratioDQPSKDifferential Quaternary Phase Shift KeyingGSGround StationISIInter Symbol InterferenceOSIOpen System InterconnectPFDPower Flux Densityppmparts per millionPRBSPseudo Random Bit SequenceRFRadio Frequencyrmsroot mean squareTDMATime Division Multiple AccessTFTSTerrestrial Flight Telecommunications SystemWOWWeight On Wheels3.3SymbolsFor the purposes of the present document, the following symbol applies:C0modulator offset (see subclause 6.3.2)4Frequency range and radio channel arrangementThe frequency range and channel arrangements are specified in ETS 300 326-2 [1] subclauses 8.8.1.1.1 and 8.8.1.1.2.4.1Frequency rangeThe frequency range for terrestrial Aeronautical Public Correspondence (APC) is as follows:-1 670 MHz to 1 675 MHz for ground to air use (AT receive);-1 800 MHz to 1 805 MHz for air to ground use (AT transmit).4.2Radio channel arrangementThe Terrestrial Flight Telecommunications System (TFTS) radio frequency channel arrangement provides for 164 pairsof Radio Frequency (RF) channels (one channel for each direction of transmission). The centre frequencies of thesechannels are given by the following:-Fg(n) = 1 670 + n/33 MHz;SIST EN 300 789:2000
EN 300 789 V1.1.1 (1998-03)8-Fa(n) = Fg(n) + 130 MHz;where:-Fg(n) is the frequency of the nth ground transmit channel;-Fa(n) is the frequency of the nth airborne transmit channel;-n is the channel number (1 to 164).Where frequencies have been specified in the present document, they are rounded up with a resolution of 1 Hz.4.3ModulationThe modulation method used shall be p/4 Differential Quaternary Phase Shift Keying (p/4 DQPSK). The modulationscheme shall use the phase constellation shown in figure 1.Q101IFigure 1: p/4 DQPSK constellationSIST EN 300 789:2000
EN 300 789 V1.1.1 (1998-03)95General aspects of TFTS testing proceduresTwo testing procedures are covered by the present document: a testing procedure for the protection and compatibility ofthe TFTS network equipment and a testing procedure for the protection of other radio services.5.1Protection of the TFTS networkThese tests may be described as assuring that:-interchange of TFTS equipment from several manufacturers is possible;-no harm is done to the TFTS network.5.2Protection of other servicesBasic tests to ensure that the level of protection afforded to other services is as has been specified in ETS 300 326-2 [1].These tests may be described as assuring that no unacceptable interference occurs to other radio services.5.3Access to signalsThe standard interface points of the AT shall be used for testing purposes, see subclause 6.2 of ETS 300 326 part 2 [1]:Ua interface: This shall be replaced by an equivalent interface at the AT transceiver RF access points which shall allowfor the connection of signals coming from or going to the RF test system. Measurements shall be made at the antennaport, unless stated otherwise, using the antenna feed cable.This test configuration has assumed a cable loss of 3 dB between the diplexer and the antenna port, see figure 2.TXRXAeTFTS DiplexerRF o/pTFTS Tx/RxRF i/pTFTS AntennaCable loss 3 dBAntenna portFigure 2: Antenna port interface point5.4Environmental conditions for tests-temperature:15 °C to 35 °C;-relative humidity:20 % to 75 %;-pressure:990 mBar to 1 014 mBar.Testing under other environmental conditions will have been undertaken by manufacturers according to ARINCcharacteristic 752 [4] and EUROCAE ED-14C [5] and shall not be repeated for the present document.5.5Power supply requirementsThe power supply shall be in accordance with ARINC characteristic 752 [4] i.e. 115 V AC (nominal) supply at 400 Hz(nominal) single phase.SIST EN 300 789:2000
EN 300 789 V1.1.1 (1998-03)106Tests of radio aspects of the physical layerThe physical layer is the lowest level of the Open System Interconnect (OSI) reference model and supports all of thefunctions required for the transmission of bit streams on the physical medium (see ETS 300 326 part 2 [1],subclause 8.1).6.1GeneralThis subclause describes the tests that are necessary to ensure conformance to the required protection criteria for otherservices operating in the same or adjacent bands to those used by TFTS as given in subclause 4.1 and the tests necessaryto ensure that no unacceptable interference is caused to other radio services elsewhere in the radio spectrum.6.1.1DocumentationLayer 1 TFTS Radio Interface requirements are given in the following subclauses of ETS 300 326-2 [1]:-8.6Time Division Multiple Access (TDMA) characteristics;-8.7Modulation characteristics;-8.8Radio transmission and reception characteristics;-8.10Radio sub-system link control;-8.11Radio sub-system synchronisation.6.1.2Limits for radio measurements for conformance testing6.1.2.1Unwanted emissionsETS 300 326-2 [1] subclauses 8.8.2.5 and 8.8.2.6.6.1.2.2Modulator and transmitter accuracyETS 300 326-2 [1] subclause 8.7.2.3.6.1.2.3Frequency errorETS 300 326-2 [1] subclause 8.8.1.3.1.6.1.2.4Transmitter output powerETS 300 326-2 [1] subclause 8.8.2.2.1.6.1.2.5RF spectrumETS 300 326-2 [1] subclause 8.8.2.4.6.1.2.6Receiver sensitivity without interfererETS 300 326-2 [1] subclause 8.8.3.2.1.6.1.2.7Co-channel sensitivityETS 300 326-2 [1] subclause 8.8.3.2.3.SIST EN 300 789:2000
EN 300 789 V1.1.1 (1998-03)116.1.2.8Adjacent channel sensitivityETS 300 326-2 [1] subclause 8.8.3.2.4.6.1.3Test apparatusThe tests require the AT to be set up in various power and frequency configurations which require a suitably interfacedtest system to command the AT directly (see subclause 6.1.4.1).Certain items of standard test equipment are required, these are given in table 1.Table 1: Standard test equipmentItemDescriptionAT control test softwareMeans of controlling AT functions without a Ground Station (GS) (e.g.RS232 interface on AT with control command set and ability to readdata from the AT).Spectrum AnalyserSweep 9 kHz to 12,75 G
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