SIST EN 300 234 V1.2.1:2003

• Abstract:

  Revision to return loss parameter.

• Status: Published
• Publication Date: 30-Nov-2003
• Withdrawal Date: 30-Sep-2003
• ICS: 33.040.20 - Transmission systems
• ICS: 33.060.30 - Radio relay and fixed satellite communications systems
• Technical Committee: RES - Radio equipment and systems
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Ref Project: ETSI EN 300 234 V1.2.1 (1998-10) - Transmission and Multiplexing (TM); Digital Radio Relay Systems (DRRS); High capacity DRRS carrying 1 x STM-1 signals and operating in frequency bands with about 30 MHz channel spacing and alternated arrangements

Overview

SIST EN 300 234 V1.2.1:2003 is a standard developed by the Slovenski inštitut za standardizacijo (SIST), harmonized with the European standard EN 300 234. This document details the requirements for high capacity Digital Radio Relay Systems (DRRS) that transport 1 x STM-1 signals, operating within frequency bands utilizing approximately 30 MHz channel spacing and alternate polarizations. The revision primarily addresses the return loss parameter, which is significant for minimizing signal reflection and optimizing performance in digital and hybrid telecommunication networks.

Key Topics

• Digital Radio Relay Systems (DRRS): Specifies technical requirements for high-capacity radio relay links, crucial for backbone and regional telecommunications.
• STM-1 Signals and SDH: Establishes guidelines for DRRS systems handling Synchronous Transport Module-level 1 (STM-1) signals according to the Synchronous Digital Hierarchy (SDH), ensuring network compatibility and efficient data transport.
• Frequency Bands & Channel Spacing: Outlines operation in bands up to 15 GHz, with about 30 MHz spacing between adjacent cross-polar channels, referencing ITU-R recommendations for band allocation.
• Return Loss Requirements: The standard revision focuses on defining minimum return loss values to reduce reflections in both transmitter and receiver subsystems.
• Transmitter/Receiver Performance: Details output power classes, spectrum masks, spurious emissions, and environmental considerations for both indoor and outdoor installations.
• System Interfaces: Includes baseband (STM-1 electrical/optical) and legacy 140 Mbit/s plesiochronous electrical interfaces, referencing ITU-T recommendations for physical layer compatibility.

Applications

SIST EN 300 234 V1.2.1:2003 is directly applicable in the deployment and maintenance of:

• Regional and Trunk Telecommunication Networks: Utilized in medium- and long-distance links, supporting 1 x STM-1 transport for reliable high-capacity data transmission.
• Backbone Infrastructure: Essential for network operators and service providers rolling out or upgrading backbone links with radio relay technology, particularly in regions where fiber may be impractical.
• Converged Networks: Facilitates operation alongside existing analogue and legacy digital systems, providing interoperability at the RF system level.
• Equipment Design and Compliance: Serves as a foundational reference for manufacturers designing radio transmission equipment, ensuring product conformity to European norms for RF performance, environmental tolerance, and electromagnetic compatibility.
• Upgrade of Existing Networks: Addresses system compatibility where digital and analogue channels might share the same antenna infrastructure, thus aiding network evolution.
• Network Management: Supports Telecommunications Management Network (TMN) integration, including SDH-based management features.

Related Standards

To ensure proper implementation and regulatory compliance, SIST EN 300 234 V1.2.1:2003 refers to or aligns with the following international and European standards and recommendations:

• ITU-R Recommendations (e.g., 382, 383, 385, 386, 497, 636, 750, 751) - For channel arrangement and performance of radio-relay systems.
• ITU-T Recommendations (e.g., G.703 for physical/electrical interfaces, G.708 and G.709 for SDH structure, G.773, G.784)
• ETS 300 019 and ETS 300 132 - For environmental test conditions and power supply specifications.
• CEPT Recommendation T/L 04-04 - For harmonization and performance objectives of digital radio relay equipment below 10 GHz.
• EN 300 234 - Parent European norm ensuring cross-market compatibility.
• Other relevant ETSI standards addressing equipment engineering and electromagnetic compatibility.

Practical Value

By conforming to SIST EN 300 234 V1.2.1:2003, telecom operators and equipment vendors benefit from:

• Optimized Signal Quality: Enhanced return loss performance reduces interference and maximizes data throughput.
• Network Interoperability: Ensures devices from different vendors interoperate effectively in shared RF environments.
• Future-Proof Deployments: Supports transition from legacy to modern SDH transport while maintaining backwards compatibility.
• Regulatory Compliance: Simplifies approval and certification processes for network equipment across European and international markets.

Keywords: Digital Radio Relay Systems, DRRS, STM-1, SDH, frequency bands, radio link standards, return loss, channel spacing, telecommunication backbone, regulatory compliance, SIST EN 300 234.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.RYTransmission and Multiplexing (TM); Digital Radio Relay Systems (DRRS); High capacity DRRS carrying 1 x STM-1 signals and operating in frequency bands with about 30 MHz channel spacing and alternated arrangements33.060.30Radiorelejni in fiksni satelitski komunikacijski sistemiRadio relay and fixed satellite communications systems33.040.20Prenosni sistemTransmission systemsICS:Ta slovenski standard je istoveten z:EN 300 234 Version 1.2.1SIST EN 300 234 V1.2.1:2003en01-december-2003SIST EN 300 234 V1.2.1:2003SLOVENSKI
STANDARD
EN 300 234 V1.2.1 (1998-10)European Standard (Telecommunications series)Transmission and Multiplexing (TM);Digital Radio Relay Systems (DRRS);High capacity DRRS carrying 1 x STM-1signals and operating in frequency bands with about 30 MHzchannel spacing and alternated arrangementsSIST EN 300 234 V1.2.1:2003

ETSIEN 300 234 V1.2.1 (1998-10)2ReferenceREN/TM-04061 (26000ioo.PDF)KeywordsDRRS, SDH, STM, transmissionETSIPostal addressF-06921 Sophia Antipolis Cedex - FRANCEOffice address650 Route des Lucioles - Sophia AntipolisValbonne - FRANCETel.: [phone]
Fax: [phone]Siret N° 348 623 562 00017 - NAF 742 CAssociation à but non lucratif enregistrée à laSous-Préfecture de Grasse (06) N° 7803/[e-mail]://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 300 234 V1.2.1:2003

ETSIEN 300 234 V1.2.1 (1998-10)3ContentsIntellectual Property Rights.5Foreword.51Scope.62References.63Abbreviations and symbols.73.1Abbreviations.73.2Symbols.84Network and system considerations.85General characteristics.85.1Frequency bands and channel arrangements.85.2Modes of operation.95.3Types of installation.95.3.1Environmental conditions.95.3.1.1Equipment within weatherprotected locations.95.3.1.2Equipment for non-weatherprotected locations.95.3.2Electromagnetic compatibility conditions.105.3.3Mechanical dimensions.105.3.4Power supply.105.3.5Safety considerations.115.4Telecommunications Management Network (TMN) interface.115.5System block diagram.115.6Intermediate Frequency (IF).115.7Local oscillator arrangements.126Transmitter characteristics.126.1Output power.126.2Automatic Transmit Power Control (ATPC).126.3RF spectrum masks.126.4Spectral lines at the symbol rate.176.5Spurious emissions.176.5.1Spurious emissions - external.176.5.2Spurious emissions - internal.176.6Radio frequency tolerance.186.7Return loss.187Receiver characteristics.187.1Receiver image rejection.187.2Spurious emissions.187.2.1Spurious emissions - external.197.2.2Spurious emissions - internal.197.3Input level range.197.4Overall receiver selectivity for the L6 GHz innermost channels.197.5Return loss.218System characteristics without diversity.218.1Equipment background BER.218.2BER as a function of receiver input level.218.3Interference sensitivity.218.3.1Co-channel interference sensitivity.218.3.2Adjacent channel interference sensitivity.228.3.3CW Spurious Interference.238.4Distortion sensitivity.23SIST EN 300 234 V1.2.1:2003

ETSIEN 300 234 V1.2.1 (1998-10)49System characteristics with diversity.239.1Differential delay compensation.239.2BER performance.23Annex A (informative):Branching/feeder/antenna requirements.24A.1Cross-Polar Discrimination (XPD).24A.1.1Intermodulation products.24A.1.2Interport isolation.24A.1.3Return loss.24A.2ATPC.24Annex B (informative):Bibliography.25History.26SIST EN 300 234 V1.2.1:2003

ETSIEN 300 234 V1.2.1 (1998-10)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 SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respectof ETSI standards", which is available free of charge from the ETSI Secretariat. Latest updates are available on theETSI Web server (http://www.etsi.org/ipr).Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guaranteecan be given as to the existence of other IPRs not referenced in SR 000 314 (or the updates on the ETSI Web server)which are, or may be, or may become, essential to the present document.ForewordThis European Standard (Telecommunications series) has been produced by ETSI Technical Committee Transmissionand Multiplexing (TM).The present document contains the minimum technical requirements to ensure compatibility of products andconformance with radio regulations across ETSI member states. Radio terminals from different manufacturers are notrequired to interwork at radio frequency (i.e. no common air interface). However, terminals may be combined with othermanufacturers equipment on an Radio Frequency (RF) branching network for operation on different polarizations.The present document 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 addressed elsewhere.National transposition datesDate of adoption of this EN:23 October 1998Date of latest announcement of this EN (doa):31 January 1999Date of latest publication of new National Standardor endorsement of this EN (dop/e):31 July 1999Date of withdrawal of any conflicting National Standard (dow):31 July 1999SIST EN 300 234 V1.2.1:2003

ETSIEN 300 234 V1.2.1 (1998-10)61ScopeThe present document specifies parameters for digital radio-relay systems with a channel capacity of 1 x SynchronousTransport Module-level 1 (1 x STM-1) designed to operate in defined bands up to 15 GHz utilising approximately30 MHz between adjacent cross-polar channels.The parameters specified fall into two categories:a)those required to provide compatibility between channels from different sources of equipment on the same route,connected either to separate antennas, or to separate polarizations of the same antenna. This category alsoincludes parameters providing compatibility with the existing radio-relay network;b)parameters defining the transmission quality of the proposed systems.The task of defining compatibility requirements with analogue and digital systems on the same hop and at nodes is madecomplex by the fact that analogue systems and some digital systems are not standardized. Compatibility requirementsare, therefore, limited to allowing the operation of digital and analogue channels on separate ports of the same antenna.The standardization includes the following specifications:-transmitter and receiver characteristics;-baseband and Radio Frequency (RF) interface characteristics;-diversity system characteristics.Two possible baseband interfaces have to be considered:-one for STM-1 signals (electrical and/or optical) in accordance with ITU-R Recommendation 750; and-one for 140 Mbit/s plesiochronous signals (only electrical), according to ITU-T Recommendation G.703.The 140 Mbit/s signals should be carried "open-port", i.e. in a transparent manner independent of their content. Theyshould be mapped into a 155 Mbit/s STM-1 signal as described in ITU-T Recommendations G.708 and G.709.As regards the STM-1 signal the Section Overhead (SOH) processing is covered in a separate ETSI STC TM 4document (a report on Synchronous Digital Hierarchy (SDH) aspects) and in ITU-R Recommendation 750 [7].2ReferencesThe following documents contain provisions which, through reference in this text, constitute provisions of the presentdocument.· References are either specific (identified by date of publication, edition number, version number, etc.) ornon-specific.· For a specific reference, subsequent revisions do not apply.· For a non-specific reference, 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]ITU-R Recommendation 382: "Radio-frequency channel arrangements for medium and highcapacity analogue radio-relay systems operating in the 2 and 4 GHz bands, or for medium and highcapacity digital radio-relay systems operating in the 4 GHz band".[2]ITU-R Recommendation 385: "Radio-frequency channel arrangements for radio-relay systemsoperating in the 7 GHz band".[3]ITU-R Recommendation 383: "Radio-frequency channel arrangements for radio-relay systemsoperating in the Lower 6 GHz band".SIST EN 300 234 V1.2.1:2003

ETSIEN 300 234 V1.2.1 (1998-10)7[4]ITU-R Recommendation 386, Annex I: "Description of the radio-frequency channel arrangementreferred to in recommends 7".[5]ITU-R Recommendation 497: "Radio-frequency channel arrangements for low and mediumcapacity analogue or medium and high capacity digital radio-relay systems operating in the 13 GHzband".[6]ITU-R Recommendation 636: "Radio-frequency channel arrangements for radio-relay systemsoperating in the 15 GHz band".[7]ITU-R Recommendation 750: "Architectures and functional aspects of radio-relay systems forSDH-based networks".[8]ITU-R Recommendation 751: "Transmission characteristics and performance requirements ofradio-relay systems for SDH-based networks".[9]ETS 300 019: "Equipment Engineering (EE); Environmental conditions and environmental testsfor telecommunications equipment".[10]ETS 300 132: "Equipment Engineering (EE); Power supply interface at the input totelecommunications equipment".[11]CEPT Recommendation T/L 04-04: "Harmonization of 140 Mbit/s digital radio relay systems foroperation below 10 GHz utilising 64 QAM at about 30 MHz spacing".[12]ITU-T Recommendation G.708 (1990): "Network Node Interface for the Synchronous DigitalHierarchy".[13]ITU-T Recommendation G.709 (1990): "Synchronous Multiplexing Structure".[14]ITU-T Recommendation G.773: "Protocol suites for Q-interfaces for management of transmissionsystems".[15]ITU-T Recommendation G.784: "Synchronous digital hierarchy (SDH) management".[16]ITU-T Recommendation G.703: "Physical/electrical characteristics of hierarchical digitalinterfaces".3Abbreviations and symbols3.1AbbreviationsFor the purposes of the present document the following abbreviations apply:ATPCAutomatic Transmit Power ControlBERBit Error RatioDRRSDigital Radio-Relay SystemIFIntermediate FrequencyL6Lower 6 (GHz band)PRBSPseudo-Random Binary SequenceQAMQuadrature Amplitude ModulationRFRadio FrequencyRxReceive (Receiver)SDHSynchronous Digital HierarchySOHSection OverheadSTM-1Synchronous Transport Module-level 1TMNTelecommunications Management NetworkTxTransmit (Transmitter)VSWRVoltage Standing Wave RatioXPDCross-Polar DiscriminationSIST EN 300 234 V1.2.1:2003

ETSIEN 300 234 V1.2.1 (1998-10)83.2SymbolsFor the purposes of the present document the following symbols apply:dBdecibeldBmdecibel relative to 1 mWGHzGigaHertzkmkilometrem/smetres per secondMbit/sMegabit per secondMHzMegaHertznsnanosecondppmparts per millionW/m²Watts per square metre4Network and system considerationsThe area of application of these digital radio-relay systems is foreseen to be in regional and trunk networks.Consideration shall be given to the special requirement in the case of a regional network, e.g. simpler towers with lessspace for antenna, different network structures with high density nodes. Application may also be envisaged for locallinks and unidirectional connections.Systems considered in the present document should be able to respect ITU-R high grade performance objectives.The systems considered should operate in these networks having regard for existing hop lengths, which are consideredto be normally up to about 30 km to 40 km for regional and about 60 km for trunk networks, respectively. Hop lengthsgreater than this latter length, up to about 100 km, are used in special applications.5General characteristics5.1Frequency bands and channel arrangementsThe systems shall be required to operate in the following frequency bands, to the specified ITU-R Recommendation onthe quoted channel spacings.4 GHzITU-R Recommendation 382 [1] with 29 MHz channel spacing. The centre gap between transmitters and receivers inITU-R Recommendation 382 [1] is 68 MHz.Lower 6 GHzITU-R Recommendation 383 [3] with 29,65 MHz spacing and a centre gap of 44,49 MHz. The alternative plan in whichchannels 8 and 1' operate on opposite polarizations should be utilised.7 GHzA number of frequency channelling plans are in use at 7 GHz, including that given in ITU-R Recommendation 385 [2]Annex III. These plans all make use of 28 MHz channel spacing with centre gaps of 56 MHz or 84 MHz.8 GHzITU-R Recommendation 386 [4], Annex 1, with 29,650 MHz spacing and a centre gap of 103,770 MHz.13 GHzITU-R Recommendation 497 [5] with 28 MHz spacing and a centre gap of 70 MHz.SIST EN 300 234 V1.2.1:2003

ETSIEN 300 234 V1.2.1 (1998-10)915 GHzITU-R Recommendation 636 [6] with 28 MHz spacing. The centre gap shall be equal to N x 28 MHz (N integer) andgreater than 84 MHz.5.2Modes of operationThe mode of operation shall make use of alternate polarizations for adjacent channels in all frequency bands up to15 GHz (covered by the present document).It should be noted that systems designed for co-frequency cross-polar operation with a 30 MHz channel spacing are alsoexpected to comply at least with the specifications contained in the present document.However, more stringent specifications for spectrum masks and interference sensitivity would certainly be required forco-frequency cross-polar operation.5.3Types of installationFor frequency bands below 10 GHz mainly indoor installations are foreseen.For radio-relay systems operating in the 13 GHz and 15 GHz bands both indoor and partially outdoor installations areforeseen.5.3.1Environmental conditionsThe equipment shall be required to meet either the environmental conditions set out in ETS 300 019-1-3 [9] andETS 300 019-1-4 [9], which define weatherprotected and non-weatherprotected locations, classes and test severities, orone of the conditions listed in subclause 5.3.1.2.5.3.1.1Equipment within weatherprotected locationsThe most important climatic parameters for the five classes defined are given in table 1.Table 1Climatic class3.13.23.33.43.5High air temperature (ºC)+40+45+55+70+40Low air temperature (ºC)[phone]High relative humidity (%)8595100100100Low relative humidity (%)55101010Air movement (m/s)55555Solar radiation (W/m²)7007001 1201 120-For equipment designed for stationary use in weatherprotected locations (indoor installation), only classes 3.1 or 3.2shall apply (see ETS 300 019-1-3 [9]).5.3.1.2Equipment for non-weatherprotected locationsThis type of equipment is generally described as "outdoor" equipment. Class 4.1 or extended class 4.1E parametersshould be applied. Class 4.1 applies to many ETSI countries and class 4.1E applies to them all. The most important
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