SIST ETS 300 786:2000

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Transmission and Multiplexing (TM); Digital Radio Relay Systems (DRRS); Sub-STM-1 DRRS operating in the 13 GHz, 15 GHz and 18 GHz frequency bands with about 14 MHz co-polar channel spacing33.060.30Radiorelejni in fiksni satelitski komunikacijski sistemiRadio relay and fixed satellite communications systemsICS:Ta slovenski standard je istoveten z:ETS 300 786 Edition 1SIST ETS 300 786:2000en01-januar-2000SIST ETS 300 786:2000SLOVENSKI
STANDARD



SIST ETS 300 786:2000



EUROPEANETS 300 786TELECOMMUNICATIONOctober 1998STANDARDSource: TMReference: DE/TM-04033ICS:33.020Key words:DRRS, radio, SDH, STM, transmissionTransmission and Multiplexing (TM);Digital Radio Relay Systems (DRRS);Sub-STM-1 DRRS operating in the 13 GHz, 15 GHz and 18 GHzfrequency bands with about 14 MHzco-polar channel spacingETSIEuropean Telecommunications Standards InstituteETSI SecretariatPostal address: F-06921 Sophia Antipolis CEDEX - FRANCEOffice address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCEInternet: secretariat@etsi.fr - http://www.etsi.orgTel.: +33 4 92 94 42 00 - Fax: +33 4 93 65 47 16Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and theforegoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1998. All rights reserved.SIST ETS 300 786:2000



Page 2ETS 300 786: October 1998Whilst every care has been taken in the preparation and publication of this document, errors in content,typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to"ETSI Standards Making Support Dept." at the address shown on the title page.SIST ETS 300 786:2000



Page 3ETS 300 786: October 1998ContentsForeword.51Scope.72Normative References.73Definitions, abbreviations and symbols.103.1Definitions.103.2Abbreviations.103.3Symbols.104General characteristics.104.1Frequency Bands and Channel Arrangements.104.2Performance and availability requirements.114.3Types of Installation.114.4Environmental Conditions.114.4.1Equipment within weather protected locations (indoor locations).114.4.2Equipment for not-weather protected locations (outdoor locations).114.5Electromagnetic compatibility conditions.114.6Mechanical requirements.114.7Power supply.124.8TMN Interface.124.9Branching / feeder / antenna requirements.124.9.1Antenna radiation patterns.124.9.2Return loss.124.9.3Intermodulation Products.124.9.4Equipment Flanges.124.10Block Diagram.124.11Lightning protection.125Baseband characteristics.135.1Synchronous Digital Hierarchy.135.2Plesiochronous Digital Hierarchy.136Transmitter characteristics.136.1Output Power.136.2Automatic Transmit Power Control (ATPC).146.3RF Spectrum Masks.146.4Spectral Lines at the Symbol Rate.146.5Spurious Emissions.156.5.1Spurious Emissions-External.156.5.2Spurious Emissions - Internal.156.6Radio Frequency Tolerance.157Receiver characteristics.167.1Local Oscillator Frequency Tolerance.167.2Receiver IF.167.3Receiver Image(s) Rejection.167.4Spurious Emissions.167.4.1Spurious Emissions-External.167.4.2Spurious Emissions - Internal.167.5Input Level Range.178System characteristics.178.1Equipment Background BER.178.2BER as a Function of Receiver Input Level (without interference).17SIST ETS 300 786:2000



Page 4ETS 300 786: October 19988.3Interference Sensitivity.178.3.1Co-channel Interference Sensitivity.178.3.1AMethod of testing co-channel interference sensitivity.188.3.2Adjacent Channel Sensitivity.188.3.2AMethod of testing adjacent channel (at about 14 MHz channel spacing)interference sensitivity.188.3.3C W Spurious Interference.188.4Distortion Sensitivity.18Annex A (informative):Additional information.23A.1Branching / feeder / antenna requirement.23A.1.1Antenna requirements.23A.1.1.1Antenna radiation patterns.23A.1.1.2Return Loss.23A.2ATPC.23Bibliography.24History.25SIST ETS 300 786:2000



Page 5ETS 300 786: October 1998ForewordThis European Telecommunication Standard (ETS) has been produced by the Transmission andMultiplexing (TM) Technical Committee of the European Telecommunications Standards Institute (ETSI).This ETS contains the minimum technical requirements to ensure compatibility of products andconformance with radio regulations across ETSI member states. Radio terminals from differentmanufacturers are not required to interwork at radio frequency (i.e. no common air interface).This ETS defines the requirements of radio terminal and radio-relay equipment and associated interfaces.The requirements for multiplex, network management and antenna / feeder equipment may be addressedelsewhere.Transposition datesDate of adoption of this ETS:30 October 1998Date of latest announcement of this ETS (doa):31 January 1999Date of latest publication of new National Standardor endorsement of this ETS (dop/e):31 July 1999Date of withdrawal of any conflicting National Standard (dow):31 July 1999SIST ETS 300 786:2000



Page 6ETS 300 786: October 1998Blank pageSIST ETS 300 786:2000



Page 7ETS 300 786: October 19981ScopeThis ETS specifies the minimum performance parameters for terrestrial fixed servicesradiocommunications equipment, as given below, for operation in the 13 GHz (12,75 GHz to 13,25 GHz),15 GHz (14,5 GHz to 15,35 GHz ) and 18 GHz (17,7 GHz to 19,7 GHz) frequency bands.This ETS covers equipment for the transmission of sub-STM-1 digital signals with a VC3 payloadcapacity. The standardization of sub-STM-1 radio systems for 13 GHz, 15 GHz and 18 GHz bands hasbeen prepared to ensure the compatibility with the existing plesiochronous and the new synchronoussystems concerning frequency plans and performance.The application of these digital radio-relay systems is anticipated to be for point-to-point links in local,regional and national networks, mobile base station connections, customer and access links.Consideration has to be given to special requirements of the local and access network, e.g. simple towerswith less space for antenna, different network structures with high density nodes.The systems considered shall operate in these networks having regard for existing hop lengths, whichmainly depend on the frequency band envisaged, the performance objectives set by relevantITU-R Recommendations or national Network Operators requirements and existing propagationcharacteristics. The hop lengths are considered to be normally up to 37 km in the 13 GHz band, up to30 km in the 15 GHz band and up to 20 km in the 18 GHz band.The parameters to be specified fall into two categories:a)Those that are required to provide compatibility between RF channels occupied by different sourcesof equipment on the same route connected either to:-separate antennas; or to-separate polarization of the same antenna.NOTE:Equipment supplied by different manufactures on the same path and using differentpolarizations shall operate on different frequencies.b)Parameters defining the transmission quality of the proposed system.The standardization deals with IF, RF and baseband characteristics relevant to Sub-STM-1 SDHtransmission. Spurious emissions and EMC requirements are also included in the present document.Safety regulations are outside the scope of this ETS.2Normative ReferencesThis ETS incorporates by dated and undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listedhereafter. For dated references, subsequent amendments to or revisions of any of these publicationsapply to this ETS only when incorporated in it by amendment or revision. For undated references the latestedition of the publication referred to applies.[1]ITU-R Recommendation F.750-3: "Architectures and functional aspects ofradio-relay systems for SDH-based networks".[2]ITU-R Recommendation F.751-2: "Transmission characteristics andperformance requirements of radio-relay systems for SDH-based networks".[3]ITU-R Recommendation F.634-4: "Error performance objectives for real digitalradio-relay links forming part of the high-grade portion of international digitalconnections at a bit rate below the primary rate within an integrated servicesdigital network".SIST ETS 300 786:2000



Page 8ETS 300 786: October 1998[4]ITU-R Recommendation F.696-2: "Error performance and availability objectivesfor hypothetical reference digital sections forming part or all of themedium-grade portion of an ISDN connection at a bit rate below the primary rateutilizing digital radio-relay systems".[5]ITU-R Recommendation F.697-2: "Error performance and availability objectivesfor the local-grade portion at each end of an ISDN connection at a bit rate belowthe primary rate utilizing digital radio-relay systems".[6]ITU-T Recommendation G.821: "Error performance of an international digitalconnection operating at a bit rate below the primary rate and forming part of anintegrated services digital network".[7]ITU-T Recommendation G.826: "Error performance parameters and objectivesfor international, constant bit rate digital paths at or above the primary rate".[8]ITU-R Recommendation F.497-5: "Radio-frequency channel arrangements forradio-relay systems operating in the 13 GHz frequency band".[9]ITU-R Recommendation F.636-3: "Radio-frequency channel arrangements forradio-relay systems operating in the 15 GHz band".[10]ITU-R Recommendation F.595-5: "Radio-frequency channel arrangements forradio-relay systems operating in the 18 GHz frequency band".[11]ETS 300 019, Parts 1 and 2: "Equipment engineering; Environmental conditionsand environmental tests for telecommunications equipment Parts 1 and 2".[12]ETS 300 385: "Radio Equipment and Systems (RES); ElectroMagneticCompatibility (EMC) standard for digital fixed radio links and ancillary equipmentwith data rates at around 2 Mbit/s and above".[13]ETS 300 119: "Equipment engineering (EE); European telecommunicationstandard for equipment practice".[14]ETS 300 132: "Equipment engineering (EE); Power supply interface at the inputto telecommunications equipment".[15]ITU-T Recommendation G.784: "Synchronous digital hierarchy (SDH)management".[16]ITU-T Recommendation G.773: "Protocol suites for Q-interfaces formanagement of transmission systems".[17]ITU-T Recommendation G.703: "Physical/electrical characteristics ofhierarchical digital interfaces".[18]ITU-T Recommendation G.707: "Network node interface for the synchronousdigital hierarchy (SDH)".[19]ITU-T Recommendation G.781: "Structure of Recommendations on equipmentfor the synchronous digital hierarchy (SDH)".[20]ITU-T Recommendation G.782: "Types and general characteristics ofsynchronous digital hierarchy (SDH) equipment".[21]ITU-T Recommendation G.783: "Characteristics of synchronous digital hierarchy(SDH) equipment functional blocks".[22]ITU-T Recommendation G.957: "Optical interfaces for equipments and systemsrelating to the synchronous digital hierarchy".SIST ETS 300 786:2000



Page 9ETS 300 786: October 1998[23]ETS 300 174: "Network Aspects (NA); Digital coding of component televisionsignals for contribution quality applications in the range 34 - 45 Mbit/s".[24]Void.[25]ITU-R Recommendation F.695: "Availability objectives for real digital radio-relaylinks forming part of a high grade circuit within an integrated services digitalnetwork".[26]ETS 300 833: "Transmission and Multiplexing (TM); Digital Radio RelaySystems (DRRS); Antennas used in point-to-point DRRS operating in thefrequency band 3 to 60 GHz".[27]Void.[28]EN 301 390: "Transmission and Multiplexing (TM); Digital Radio Relay Systems(DRRS); Spurious emissions and receiver immunity at equipment antenna portsof DRRS".[29]ITU-R Recommendation F.1092-1: "Error performance objectives for constantbit rate digital path at or above the primary rate carried by digital radio-relaysystems which may form part of the international portion of the 27 500 kmhypothetical reference path".[30]ITU-R Recommendation F.1189-1: "Error performance objectives for constantbit rate digital paths at or above the primary rate carried by digital radio-relaysystems which may form part or all of the national portion of the 27 500 kmhypothetical reference path".[31]Void.[32]ETS 300 635: "Transmission and multiplexing(TM); Synchronous digitalhierarchy (SDH); Radio specific functional blocks for transmission of M xSTM-N".[33]TR 101 035: "Transmission and Multiplexing (TM); Synchronous DigitalHierarchy (SDH) aspects regarding Digital Radio Relay Systems (DRRS)".[34]Void.[35]ETS 300 785: "Transmission and Multiplexing (TM); Synchronous DigitalHierarchy (SDH); Radio specific functional blocks for transmission of M xsub-STM-1".[36]ITU-R Recommendation F.752-1: "Diversity Techniques for radio-relaysystems".[37]CEPT/ERC Recommendation T/R 12-02: "Harmonized radio frequency channelarrangements for analogue and digital terrestrial fixed systems operating in theband 12,75 GHz to 13,25 GHz".[38]CEPT/ERC Recommendation T/R 12-07: "Harmonized radio frequency channelarrangements digital terrestrial fixed systems operating in the bands 14.5 GHzto 14.62 GHz paired with 15,23 GHz to 15,35 GHz".[39]CEPT/ERC Recommendation T/R 12-03: "Harmonized radio frequency channelarrangements for digital terrestrial fixed systems operating in the band 17,7 GHzto 19,7 GHz".[40]ITU-T G.861: "Principles and guidelines for the integration of satellite and radiosystems in SDH transport networks".SIST ETS 300 786:2000



Page 10ETS 300 786: October 1998[41]IEC 835-2: "Methods of measurement for equipment used in digital microwaveradio transmission systems; Part 2: measurements on terrestrial radio-relaysystems".3Definitions, abbreviations and symbols3.1DefinitionsFor the purposes of this ETS, the following definition applies:Sub-STM-1: Current terminology for medium capacity Synchronous Transport Module at 51,84 Mbit/sdefined by ITU-T Recommendation G.707 [18] and ITU-R Recommendation F.750-3 [1], it also coincidewith RR-STM. Recently renominated as STM-0 by ITU-T Recommendation G.861 [40].3.2AbbreviationsFor the purposes of this ETS, the following abbreviations apply:ATPCAutomatic Transmit Power ControlBERBit Error RatioCMICode Mark InversionIFIntermediate FrequencyL.O.Local OscillatorNFDNet Filter DiscriminationNNINetwork Node InterfacePRBSPseudo-Random Binary SequenceRCSOHRadio Complementary Section Over HeadRFRadio FrequencyRFCOHRadio Frame Complementary Over HeadRXReceiverSDHSynchronous Digital HierarchySOHSection OverHeadSRLSpectrum Reference LevelSTM-1Synchronous Transport Module level 1Sub-STM-1Customary wording for RR-STM (Synchronous Transport Module)TMNTelecommunications Management NetworkTXTransmitter3.3SymbolsFor the purposes of this ETS, the following symbols apply.dBdecibeldBmdecibel relative to 1 mWGHzGigaHertzkmkilometreMbit/sMegabit per secondMHzMegaHertznsnanosecondppmparts per million4General characteristics4.1Frequency Bands and Channel ArrangementsThe frequency bands covered by the present document are the 12,75 GHz to 13,25 GHz band, the14,5 GHz to 15,35 GHz band and the 17,7 GHz to 19,7 GHz band for fixed services.The channelling arrangements according to ITU-R F. Recommendations, the co-polar channel spacingand the centre gap are stated in table 1.The use of co-channel dual polarized (CCDP) operation is also envisaged.SIST ETS 300 786:2000



Page 11ETS 300 786: October 1998Table 1 Frequency bands and channel arrangementsDescriptionFrequency bands13 GHz15 GHz18 GHzITU-R Recommendation F497-5 [8]636-3 [9]595-5 [10]CEPT/ERC RecommendationT/R 12-02 [37]T/R 12-07[38]T/R 12-03 [39]Co-polar adjacent channelspacing (MHz)141413,75Centre gap (MHz)70N x 28(> 84 MHz)61,254.2Performance and availability requirementsEquipment shall be designed in order to meet network performance and availability requirements foreseenby ITU-T Recommendation(s) G.821 [6] or/and G.826 [7], following the criteria defined inITU-R Recommendations F.634-4 [3], F.695 [25], F.696-2 [4], F.697-2 [5], F.1092-1 [29] and F.1189-1 [30]for high or medium or local grade or international or national portion of the digital connection.The implication of the link design on the performance is recognized and the general design criteriareported in ITU-R Recommendations F.752-1 [36], is to be applied.4.3Types of InstallationBoth indoor and partially outdoor installations are considered.The equipment shall be required to meet the environmental conditions set out in ETS 300 019 [11] whichdefines weather protected and non-weather protected locations, classes and test severity.The manufacturer shall state which class the equipment is designed to withstand.4.4Environmental Conditions4.4.1Equipment within weather protected locations (indoor locations)Equipment intended for operation within temperature controlled locations or partially temperaturecontrolled locations shall meet the requirements of ETS 300 019 [11] classes 3.1 and 3.2 respectively.Optionally, the more stringent requirements of ETS 300 019 [11] classes 3.3 (Non temperature controlledlocations), 3.4 (Sites with heat trap) and 3.5 (Sheltered locations) may be applied.4.4.2Equipment for not-weather protected locations (outdoor locations)Equipment intended for operation within non-weather protected locations shall meet the requirements ofETS 300 019 [11], class 4.1 or 4.1E.Class 4.1 applies to many European countries and class 4.1E applies to all European countries.4.5Electromagnetic compatibility conditionsEquipment shall operate under the conditions specified in relevant standard produced by ETSI(ETS 300 385) [12].4.6Mechanical requirementsThe mechanical dimensions for indoor installations shall be in agreement with ETS 300 119 [13].For outdoor installation each of the outdoor unit shall be weather proof or weather protected.The outdoor unit shall be separable from the antenna.SIST ETS 300 786:2000



Page 12ETS 300 786: October 19984.7Power supplyThe equipment shall operate from any of the supply voltages within the ranges specified in draftETS 300 132 [14]. For DC systems, the positive pole of the battery will be earthed at the source.NOTE:Some countries may require to use a primary supply of 24 V DC or 110 V AC, which isnot covered by ETS 300 132 [14].4.8TMN InterfaceITU-T Recommendations G.784 [15 ] and G.773 [16], ITU-R Recommendations F.750-3 [1] andF.751-2 [2] give the general requirements for TMN interface and functionality; ETS 300 635 [32] gives theradio specific functional block description and the related radio fragment information model respectively.NOTE:The standardization of TMN interface functionalities is under responsibility anddevelopment of ETSI TC TMN, and will be applicable to the radio relay systemsconsidered in this ETS.4.9Branching / feeder / antenna requirements4.9.1Antenna radiation patternsSee annex A.4.9.2Return lossThe minimum return loss of the branching system shall be 23 dB for indoor systems and 20 dB for partiallyoutdoor systems. The measurement shall be referred to point C/C' towards the radio equipment andacross a frequency band greater than or equal to 1,3 times the maximum symbol frequency away from theactual centre frequency used for the equipment.When the antenna is an integral part of the equipment there shall be no requirement.4.9.3Intermodulation ProductsWhen multi-channel branching is used each intermodulation product measured at point C' shall notexceed -110 dBm referenced to the point B for transmitter output power levels up to the maximumnominal level.4.9.4Equipment FlangesWhen wave guides are required at reference point C /C', standard IEC flanges should be used for thefrequency bands in question (e.g. PDR/UBR/UDR120 for 13 GHz-band, PDR/UBR/UDR 140 for15 GHz-band and either PDR/UBR/UDR180 or PDR/UBR/UDR220 for 18 GHz-band).4.10Block DiagramThe system block diagram is shown in figure 1. The intersection points are for reference only and notnecessarily for measurement purposes nor do they indicate a specific design structure.4.11Lightning protectionLightning discharge protection shall be applied at the relevant points of outdoor equipment to safeguardagainst damage to equipment. Detailed requirements for lightning protection are under study.SIST ETS 300 786:2000



Page 13ETS 300 786: October 19985Baseband characteristics5.1Synchronous Digital HierarchyThe SDH baseband interface shall be a network node interface (NNI) at the STM-1 level in accordancewith ITU-T Recommendations G.703 [17], G.707 [18], G.781 [19], G.782 [20], G.783 [21], G.784 [15],G.957 [22], ETS 300 635 [32] and ETS 300 785 [35] (with possible simplifications under study in ETSITM3 and TM4) and ITU-R Recommendation F.750-3 [1].Two versions of the STM-1 interface are possible:-a CMI electrical interface (ITU-T Recommendations G.703 [17], G.707 [18]); and-an optical interface (ITU-T Recommendation G.957 [22]).The use of reserved bytes contained in the SOH, and their termination shall be in accordance withITU-R Recommendation F.750-3 [1]. Further details on the possible use of the SOH bytes includingadditional RFCOH or RCSOH are given in TR 101 035 [33].5.2Plesiochronous Digital HierarchyThe following optional baseband interfaces are required at the PDH level in accordance withITU-T Recommendation G.703 [17]:a)2 Mbit/s;b)34 Mbit/s.For digital video applications (ETS 300 174 covering VC2-5c concatenation) an interface at 45 Mbit/s inaccordance with ITU-T Recommendation G.703 (clause 5) [17] may be required.6Transmitter characteristics6.1Output PowerThe maximum absolute output power (averaged) shall not exceed +40 dBm.The value of the nominal output power ( averaged) declared by the supplier, referred to point B', shall bein the range for:-class A³ +30 dBm to £+40 dBm;-class B³ +20 dBm to £ +30 dBm;-class C³ +15 dBm to £ +20 dBm;including all tolerances.The tolerances shall be as follows:-nominal output power ± 2 dB: for systems operating within non-weather protected locations;-nominal output power ± 1 dB: for systems operating within weather protected locations.A means to vary the transmitter output power (for frequency co-ordination purposes) may be required.In the case of STM-1 interface, the measurement of output power shall be carried out using an STM-1 testsignal, to be defined.In the case of PDH signals, the measurement of output power shall be carried out with the carriermodulated by a pseudo-random bit sequence of length 223 - 1 for 34 Mbit/s interface and a length of 215-1for 2 Mbit/s interface.SIST ETS 300 786:2000



Page 14ETS 300 786: October 19986.2Automatic Transmit Power Control (ATPC)The ATPC range is defined as the power interval from the maximum (including tolerances) output powerlevel to the lowest transmitter output power level (at reference point B') with ATPC.ATPC is an optional feature. If ATPC is implemented the range shall not be less than 10 dB.NOTE:For hop lengths of more than about 25 km which are of interest at least in the 13 GHzband, the ATPC device with a range of 15 dB may be required.Equipment with ATPC will be subject to Manufacturer declaration of ATPC ranges and related tolerances.Testing shall be carried out with output power level corresponding to:-ATPC set manually to a fixed value for system performance;-ATPC set at maximum provided power for Tx performance.Further information on ATPC is given in an informative annex (see clause A.2).6.3RF Spectrum MasksThe System shall comply with the RF spectrum mask shown in figure 2 referenced to point B'. Theobjective of this mask is to provide the required NFD between adjacent channels with a copolar spacing ofabout 14 MHz. With the mask shown in figure 2 a calculated NFD of about 32 dB is achieved. Howevertaking into account the real spectrum shape the NFD will be about 36 dB.NOTE:On short hops or in cases where there is no interference from an adjacent channelATPC is not required. For hop lengths of more than about 25 km which are of interestat least at the 13 GHz band, ATPC in connection with a NFD of more than 39 dB maybe required.The mask shall be measured with a modulating baseb
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