ETSI EN 301 461 V1.3.1 (2002-11)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Fixed Radio Systems; Point-to-point equipment; High capacity fixed radio systems carrying SDH signals (2 x STM-1) in frequency bands with 40 MHz channel spacing and using Co-Channel Dual Polarized (CCDP) operation33.060.30Radiorelejni in fiksni satelitski komunikacijski sistemiRadio relay and fixed satellite communications systemsICS:Ta slovenski standard je istoveten z:EN 301 461 Version 1.3.1SIST EN 301 461 V1.3.1:2003en01-december-2003SIST EN 301 461 V1.3.1:2003SLOVENSKI
STANDARD
ETSI ETSI EN 301 461 V1.3.1 (2002-11) 2
Reference REN/TM-04140 Keywords DRRS, point-to-point, radio, SDH, STM, transmission, DFRS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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© European Telecommunications Standards Institute 2002. All rights reserved.
DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTM and the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. SIST EN 301 461 V1.3.1:2003

ETSI ETSI EN 301 461 V1.3.1 (2002-11) 3
Contents Intellectual Property Rights.5 Foreword.5 1 Scope.6 2 References.7 3 Symbols and abbreviations.9 3.1 Symbols.9 3.2 Abbreviations.9 4 General Characteristics.10 4.1 Frequency bands and channel arrangements.10 4.2 Modes of operation.11 4.3 Compatibility requirements between systems.11 4.4 Error performance and availability requirements.11 4.5 Environmental profile.11 4.5.1 Equipment within weather protected locations (indoor locations).12 4.5.2 Equipment for non-weather protected locations (outdoor locations).12 4.6 Mechanical dimensions.12 4.7 Power supply.12 4.8 Electromagnetic compatibility.12 4.9 Block diagram.13 4.10 TMN interface.13 4.11 Branching feeder and antenna requirements.14 4.11.1 Antenna radiation pattern.14 4.11.2 Antenna cross-polar discrimination.14 4.11.3 Antenna Inter-Port Isolation (IPI).14 4.11.4 Waveguide flanges.14 4.11.5 Return Loss (RL).14 4.11.6 Intermodulation products.14 5 Parameters for digital systems.15 5.1 Transmission capacity.15 5.2 Baseband parameters.15 5.2.1 Plesiochronous interfaces.15 5.2.2 SDH baseband interface.15 5.3 Transmitter characteristics.15 5.3.1 Transmitter power range.15 5.3.2 Automatic Transmit Power Control.15 5.3.3 Transmitter output power tolerance.16 5.3.4 TX local oscillator frequency arrangements.16 5.3.5 RF spectrum mask.16 5.3.6 Discrete CW lines exceeding the spectrum mask limit.17 5.3.6.1 Spectral lines at the symbol rate.17 5.3.6.2 Other spectral lines.17 5.3.7 Spurious emissions.18 5.3.7.1 Spurious emissions - external.18 5.3.7.2 Spurious emissions - internal.18 5.3.8 Radio frequency tolerance.19 5.4 Receiver characteristics.19 5.4.1 Input level range.19 5.4.2 RX local oscillator frequency arrangements.19 5.4.3 Spurious emissions.20 5.4.3.1 Spurious emissions - external.20 5.4.3.2 Spurious emissions - internal.20 5.4.4 Receiver image rejection.20 5.5 System performance without diversity.20 SIST EN 301 461 V1.3.1:2003

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5.5.1 BER as a function of receiver input signal level RSL.20 5.5.2 Equipment residual BER.21 5.5.3 Interference sensitivity.21 5.5.3.1 Co-channel "external" interference sensitivity.21 5.5.3.2 Adjacent channel interference sensitivity.21 5.5.3.3 CW interference.22 5.5.4 Distortion sensitivity.22 5.6 Cross Polar Interference Sensitivity.23 5.6.1 Co-channel "internal" interference sensitivity in flat fading conditions.23 5.6.2 Co-channel "internal" interference sensitivity in dispersive fading conditions.23 5.7 System characteristics with diversity.23 5.7.1 Differential delay compensation.23 5.7.2 BER performance.24 Annex A (informative): Additional Information.26 A.1 Antenna requirements.26 A.1.1 Antenna radiation patterns.26 A.1.2 Antenna Cross-Polar Discrimination (XPD).26 A.1.3 Antenna Inter-Port Isolation (IPI).26 A.1.4 Feeder/antenna return loss.26 A.2 Automatic Transmit Power Control.26 A.3 Spectrum masks.27 A.4 Co-channel (internal and external) and adjacent channel interference.27 A.5 Measurement test set for XPI characteristics.29 Annex B (informative): Bibliography.30 History.31
ETSI ETSI EN 301 461 V1.3.1 (2002-11) 5
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 European Standard (Telecommunications series) has been produced by ETSI Technical Committee Transmission and Multiplexing (TM). The present document introduces new classes and grades of equipments focused on applications with single or few channels per links, with or without the XPIC option, suitable for co-polar adjacent channel operation; typical for mobile networks infrastructures.
National transposition dates Date of adoption of this EN: 1 November 2002 Date of latest announcement of this EN (doa): 28 February 2003 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
31 August 2003 Date of withdrawal of any conflicting National Standard (dow): 31 August 2003
ETSI ETSI EN 301 461 V1.3.1 (2002-11) 6
1 Scope The present document specifies the minimum performance parameters for a high capacity digital radio-relay system operating in frequency bands with 40 MHz channel spacing in the 4 GHz, 5 GHz, U6 GHz and 11 GHz bands. The channel capacity is 1 x STM 1 on each polarization that allows to transmit up to 2 × STM 1 signals in the same RF channel by using both polarizations in co-channel dual polarized (CCDP) mode of operation with cross-polar interference canceller techniques (XPIC). The present document is also applicable to 1 x STM-1 ACCP systems operating with co-polar arrangement of
40 MHz for which the CCDP operation with XPIC is considered a non applicable option; for those systems the clauses relevant to XPIC operation (i.e. co-channel "internal" interference) are not applicable. These systems are intended for local high capacity links (e.g. mobile infrastructure connections) where few channels may be used by different operators) and the crowded environment may require co-polar operation on adjacent channels. Recognizing the benefits from the industrial point of view, two different grades of system have been defined. • Grade A: based on 30 MHz-like system technology (i.e. based on 128 states modulation) with reduced receiver BER threshold capability. • Grade B: based on 40 MHz system technology (i.e. based on 64 states modulation) with improved receiver BER threshold capability. It has to be noted that STM-1 systems can be grouped in order to offer an SDH interface higher than STM-1. The area of application of these digital radio-relay systems is foreseen to be in trunk and access networks forming part of an SDH-network including optical rings. Systems considered in the present document shall be able to respect ITU-R and ITU-T performance objectives. The systems considered should operate in these networks having regard for existing hop length, which are considered to be normally up to about 30 km to 40 km for access and about 60 km for trunk networks, respectively. Hop lengths greater than this latter length are used in special applications. The systems considered in the present document are intended to allow operation with respect to existing PDH systems using 16 QAM modulation and transmitting 140 Mbit/s applying a channel spacing of 40 MHz. The parameters specified fall into two categories: a) parameters that are required to provide compatibility between channels connected to the same antenna via a multichannel branching system, or channels on the same route connected to separate antennas; NOTE: Due to the internal functionality of the XPIC, equipment operating on both polarization of the same channel is considered to form a single CCDP system. b) parameters defining the transmission quality of the proposed system. The standardization deals with baseband, IF and RF characteristics relevant to SDH. Antenna/feeder system requirements are also considered for information to the reader, however antenna characteristics are generally covered in EN 300 833 [34]. Baseband interfaces have to be considered for STM-1 signals in accordance with ITU-T Recommendations G.707 [1] and G.957 [2]. PDH interfaces according to ITU-T Recommendation G.703 [3] for signals mapped into STM-1 signals according to ITU-T Recommendation G.707 [1] could be used. Safety aspects will not be considered in the present document. SIST EN 301 461 V1.3.1:2003

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2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. • 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. • For a non-specific reference, the latest version applies. [1] ITU-T Recommendation G.707/Y.1322 (2000): "Network node interface for the synchronous digital hierarchy (SDH)". [2] ITU-T Recommendation G.957 (1999): "Optical interfaces for equipments and systems relating to the synchronous digital hierarchy". [3] ITU-T Recommendation G.703 (2001): "Physical/electrical characteristics of hierarchical digital interfaces". [4] CEPT/ERC/REC 12-08: "Harmonised radio frequency channel arrangements and block allocations for low, medium and high capacity systems in the band 3 600 MHz to 4 200 MHz". [5] ITU-R Recommendation F.635-6: "Radio-frequency channel arrangements based on a homogeneous pattern for radio-relay systems operating in the 4 GHz band". [6] ITU-R Recommendation F.1099-3: "Radio-frequency channel arrangements for high-capacity digital radio-relay systems in the 5 GHz (4 400 - 5 000 MHz) band". [7] CEPT/ERC/REC 14-02: "Radio-frequency channel arrangements for medium and high capacity analogue or high capacity digital radio-relay systems operating in the band 6 425 MHz -
7 125 MHz". [8] ITU-R Recommendation F.384-7: "Radio-frequency channel arrangements for medium and high capacity analogue or digital radio-relay systems operating in the upper 6 GHz band". [9] CEPT/ERC/REC 12-06: "Harmonised radio frequency channel arrangements for digital terrestrial fixed systems operating in the band 10,7 GHz to 11,7 GHz". [10] ITU-R Recommendation F.387-9: "Radio-frequency channel arrangements for radio-relay systems operating in the 11 GHz band". [11] ITU-T Recommendation G.826 (1999): "Error performance parameters and objectives for international, constant bit rate digital paths at or above the primary rate". [12] ITU-R Recommendation F.1397: "Error performance objectives for real digital radio links used in the international portion of a 27 500 km hypothetical reference path at or above the primary rate". [13] ITU-R Recommendation F.1491: "Error performance objectives for real digital radio links used in the national portion of a 27 500 km hypothetical reference path at or above the primary rate". [14] ITU-R Recommendation F.752-1: "Diversity techniques for radio-relay systems". [15] ITU-R Recommendation F.1093-1: "Effects of multipath propagation on the design and operation of line-of-sight digital radio-relay systems". [16] ITU-R Recommendation F.1101: "Characteristics of digital fixed wireless systems below about
17 GHz". [17] ETSI EN 300 019 (all parts): "Environmental Engineering (EE); Environmental conditions and environmental tests for telecommunications equipment". SIST EN 301 461 V1.3.1:2003

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[18] ETSI ETS 300 132-1: "Equipment Engineering (EE); Power supply interface at the input to telecommunications equipment; Part 1: Operated by alternating current (ac) derived from direct current (dc) sources". [19] ETSI EN 300 132-2: "Environmental Engineering (EE); Power supply interface at the input to telecommunications equipment; Part 2: Operated by direct current (dc)". [20] ETSI EN 300 385: "Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for fixed radio links and ancillary equipment". [21] ETSI EN 300 417-7-1: "Transmission and Multiplexing (TM); Generic requirements of transport functionality of equipment; Part 7-1: Equipment management and auxiliary layer functions". [22] ETSI EN 301 167: "Transmission and Multiplexing (TM); Management of Synchronous Digital Hierarchy (SDH) transmission equipment; Fault management and performance monitoring; Functional description". [23] ITU-T Recommendation G.783 (2000): "Characteristics of synchronous digital hierarchy (SDH) equipment functional blocks". [24] ITU-T Recommendation G.784 (1999): "Synchronous digital hierarchy (SDH) management". [25] IEC 60154 (all parts): "Flanges for waveguides". [26] ETSI ETS 300 635: "Transmission and Multiplexing (TM); Synchronous Digital Hierarchy (SDH); Radio specific functional blocks for transmission of M x STM-N". [27] ITU-R Recommendation F.750-4: "Architectures and functional aspects of radio-relay systems for synchronous digital hierarchy (SDH)-based network". [28] ETSI TR 101 035: "Transmission and Multiplexing (TM); Synchronous Digital Hierarchy (SDH) aspects regarding Digital Radio Relay Systems (DRRS)". [29] ITU-T Recommendation O.151 (1992): "Error performance measuring equipment operating at the primary rate and above". [30] ITU-T Recommendation O.181 (2002): "Equipment to assess error performance on STM-N interfaces". [31] CEPT/ERC/REC 74-01: "Spurious emissions". [32] ITU-R Recommendation SM.329-9: "Spurious emissions". [33] ITU-R Recommendation F.1191-2: "Bandwidths and unwanted emissions of digital fixed service systems". [34] ETSI EN 300 833: "Fixed Radio Systems; Point-to-point Antennas; Antennas for point-to-point fixed radio systems operating in the frequency band 3 GHz to 60 GHz". [35] ETSI TR 101 036-1: "Fixed Radio Systems; Point-to-point equipment; Generic wordings for standards on digital radio systems characteristics; Part 1: General aspects and point-to-point equipment parameters". [36] ETSI EN 301 489-1: "Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services;
Part 1: Common technical requirements". [37] ETSI EN 301 489-4: "Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 4: Specific conditions for fixed radio links and ancillary equipment and services". [38] 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). SIST EN 301 461 V1.3.1:2003

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[39] ITU-T Recommendation G.828: "Error performance parameters and objectives for international, constant bit rate synchronous digital paths". [40] ITU-T Recommendation G.829: "Error performance events for SDH Multiplex and regenerator sections". [41] ITU-R Recommendation F.1492: "Availability objectives for real digital radio-relay links forming part of international portion constant bit rate digital path at or above the primary rate". [42] ITU-R Recommendation F.1493: "Availability objectives for real digital radio-relay links forming part of national portion constant bit rate digital path at or above the primary rate". [43] ITU-R Recommendation F.1102-1: "Characteristics of fixed wireless systems operating in frequency bands above about 17 GHz". [44] ITU-R Recommendation P.530-10: "Propagation data and prediction methods required for the design of terrestrial line-of-sight systems". [45] ETSI EN 301 126-1: "Fixed Radio Systems; Conformance testing; Part 1: Point-to-point equipment - Definitions, general requirements and test procedures". [46] ETSI ETS 300 019-1-3: "Equipment Engineering (EE); Environmental conditions and environmental tests for telecommunications equipment; Part 1-3: Classification of environmental conditions; Stationary use at weatherprotected locations". [47] ETSI ETS 300 019-1-4: "Equipment Engineering (EE); Environmental conditions and environmental tests for telecommunications equipment; Part 1-4: Classification of environmental conditions; Stationary use at non-weatherprotected locations". 3 Symbols and abbreviations 3.1 Symbols For the purposes of the present document, the following symbols apply: dB deciBel dBm deciBel relative to 1 mW GHz GigaHertz Hz Hertz kHz kiloHertz km kilometre Mbit/s Megabits per second MHz MegaHertz ns nanosecond ppm part per million 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: ACCP Adjacent Channel Co-Polar ATPC Automatic Transmit Power Control BBER Background Block Error Rate BER Bit Error Rate CCDP Co-Channel Dual Polar CMI Coded Marked Inverted CSmin minimum practical Channel Separation (for a given radio-frequency channel arrangement) CW Continuous Wave DC Direct Current EMC Electro Magnetic Compatibility SIST EN 301 461 V1.3.1:2003

ETSI ETSI EN 301 461 V1.3.1 (2002-11) 10 Fc cut-off Frequency IF Intermediate Frequency IPI Inter Port Isolation LO Local Oscillator NFD Net Filter Discrimination PDH Plesiochronous Digital Hierarchy PRBS Pseudo Random Bit Sequence QAM Quadrature Amplitude Modulation RCSOH Radio Complementary Section OverHead RF Radio Frequency RL Return Loss RSL Receive Signal Level RX Receiver S/I Signal to Interference ratio SOH Section OverHead S/XPI Signal to Cross Polar Interference ratio SDH Synchronous Digital Hierarchy STM Synchronous Transfer Module TMN Telecommunications Management Network TX Transmitter XPD Cross Polar Discrimination XPI Cross Polar Interference XPIC Cross Polar Interference Canceller 4 General Characteristics 4.1 Frequency bands and channel arrangements The equipment shall operate on one or more of the channels as defined below. 4 GHz The frequency range is 3,6 GHz to 4,2 GHz. The channel plan shall be in accordance with CEPT/ERC/REC 12-08 [4], annex A, Part 1 or ITU-R Recommendation F.635-6 [5], with 40 MHz channel spacing. The centre gap is 80 MHz. 5 GHz The frequency range is 4,4 GHz to 5 GHz. The channel plan shall be in accordance with ITU-R Recommendation F.1099-3 [6] with 40 MHz channel spacing. The centre gap is 60 MHz. U6 GHz The frequency range is 6 425 GHz to 7 110 GHz. The channel plan shall be in accordance with CEPT/ERC/REC 14-02 [7] or ITU-R Recommendation F.384-7 [8] with 40 MHz channel spacing. The centre gap is 60 MHz. 11 GHz The frequency range is 10,7 GHz to 11,7 GHz. The channel plan shall be in accordance with CEPT/ERC/REC 12-06 [9] or ITU-R Recommendation F.387-9 [10] with 40 MHz channel spacing. The centre gap is 130 MHz, 90 MHz or 50 MHz according to the frequency arrangement. NOTE: With a frequency arrangement providing a central gap of 50 MHz, common TX/RX operation of the nearest channels is not required. SIST EN 301 461 V1.3.1:2003

ETSI ETSI EN 301 461 V1.3.1 (2002-11) 11 4.2 Modes of operation The mode of operation is co-polar with possible frequency reuse with co-channel dual polar (CCDP) operation for all frequency bands. The actual exploiting of both polarizations is considered optional, while compatibility with other systems, that fully exploit the CCDP frequency reuse, is maintained. NOTE: For frequency planning purposes these systems can be deployed with co-polar operation using adjacent channel (ACCP) or frequency reuse with co-channel dual polar operation (CCDP). The combination of both operations is to be considered in the frequency planning. In defining system characteristics for CCDP systems the additional losses introduced by the branching networks must be taken into account. Depending on the implementation (split branching for even and odd channels followed by a 3 dB loss hybrid put at reference points C and/or C', narrow band RF filters concept or other solutions) additional losses ranging from 3 dB to 6 dB must be considered in evaluating the available net system gain. When narrow-band RF filters are used losses affect directly receiver thresholds at reference point B. As a consequence this must be taken into account in specifying receiver threshold limits. 4.3 Compatibility requirements between systems The compatibility requirements between systems are as follows: a) There shall be no requirement to operate transmitting equipment from one manufacturer with receiving equipment from another. b) There shall be no requirement to operate, on the same radio frequency channel, systems from different manufacturer on vertical and horizontal polarization. c) There may be a requirement to multiplex different manufacturers equipment on the same polarization of the same antenna, on different frequency channels. This is not applicable to systems with integral antenna. 4.4 Error performance and availability requirements Equipment shall be designed in order to meet network performance and availability requirements foreseen by ITU-T Recommendations G.826 [11] and G.828 [39]. The events for SDH multiplex and regenerator sections should be measured according to ITU-T Recommendation G.829 [40]. The performance and availability objectives for any overall radio connection, used in the international or national portion of the digital path, have to be based on the criteria defined in: • ITU-R Recommendations F.1397 [12] and F.1492 [41], for international portion; • ITU-R Recommendations F.1491 [13] and F.1493 [42], for the national portion. The implication of the link design on the performance is recognized and the general design criteria reported in ITU-R Recommendations F.752-1 [14], F.1093-1 [15], F.1101 [16], F.1102-1 [43] and F.1397 [12] are to be applied according the foreseen propagation scenario reported in ITU-R Recommendation P.530-10 [44]. 4.5 Environmental profile The equipment shall be required to meet the environmental conditions set out in the multipart standard EN 300 019 [17] which defines weather protected and non-weather protected locations, classes and test severity. The equipment shall comply with all the requirements of the present document at all times when operating within the boundary limits of the operational environmental profile of the equipment. The environmental profile of the equipment shall be declared by the manufacturer. SIST EN 301 461 V1.3.1:2003

ETSI ETSI EN 301 461 V1.3.1 (2002-11) 12 The fulfilment of EN 300 019 [17] environmental profiles is voluntary and not essential from the point of view of the R&TTE Directive [38]; for this purpose any operational environmental profile, as declared by the manufacturer, shall be used. Any test, carried out to generate the test report and/or declaration of conformity, required to fulfil any Conformity assessment procedure foreseen by the R&TTE Directive [38] for radio equipment, shall be carried-out with the same principles and procedures, for reference and extreme conditions, reported in clause 4.4 of EN 301 126-1 [45]. 4.5.1 Equipment within weather protected locations (indoor locations) Equipment intended for operation within temperature controlled locations or partially temperature controlled locations shall meet the requirements of ETS 300 019-1-3 [46] classes 3.1 and 3.2 respectively. Optionally, the more stringent requirements of ETS 300 019-1-3 [46] classes 3.3 (Non temperature controlled locations), 3.4 (Sites with heat trap) and 3.5 (Sheltered locations) may be applied. 4.5.2 Equipment for non-weather protected locations (outdoor locations) Equipment intended for operation within non-weather protected locations shall meet the requirements of ETS 300 019-1-4 [47], class 4.1 or 4.1E. Class 4.1 applies to many ETSI countries and class 4.1E applies to all ETSI countries. 4.6 Mechanical dimensions For outdoor installation, the outdoor unit may be separable from the antenna. For indoor installation the equipment shall conform to EN 300 019 [17]. Other mechanical arrangement which can be made compatible with EN 300 019 [17] may also be considered. 4.7 Power supply The power supply interface shall be in accordance with the characteristics of one or more of the secondary voltages foreseen in ETS 300 132-1 [18] and EN 300 132-2 [19]. NOTE: Some applications may require secondary voltages that are not covered by ETS 300 132-1 [18] and EN 300 132-2 [19]. For DC systems, the positive pole of the voltage supply shall be earthen at the source. 4.8 Electromagnetic compatibility The equipment shall comply with EN 300 385 [20] or to relevant parts of the multipart standard EN 301 489-1 [36] and EN 301 489-4 [37]. SIST EN 301 461 V1.3.1:2003

ETSI ETSI EN 301 461 V1.3.1 (2002-11) 13 4.9 Block diagram ' ' Z EDV EDH RECEIVER ADV RECEIVER ADH RECEIVE BDV BDH BRANCHING CDV BRANCHING CDH RF FILTER RECEIVE RF FILTER FEEDER DDV FEEDER DDH (*) (*) EV EH RECEIVER AV RECEIVER AH RECEIVE BV BH BRANCHING CV BRANCHING CH RF FILTER RECEIVE RF FILTER FEEDER DV FEEDER DH Z (*) (*) (**) (**) (**) DIVERSITY RECEIVER PATH MAIN RECEIVER PATH EV MODV EH ' TRANSMITTER AV ' TRANSMITTER AH ' TRANSMIT BV ' BH ' BRANCHING (*) CV ' BRANCHING (*) CH ' RF FILTER TRANSMIT RF FILTER FEEDER DV FEEDER DH ' MODH DEMODV DEMODHDEMODV DEMODH ' (*) No filter included. (**) Connection at IFor Baseband. NOTE 1: A 2 x STM-1 or 2 x 140 Mb/S interface is used at Z and Z". NOTE 2: For the purpose of defining the measurement points, the branching network does not include a hybrid. NOTE 3: The points shown above are reference points only; points C and C', D and D' in general coincide. NOTE 4: Points B and C, B' and C' may coincide when simple duplexer is used. NOTE 5: Diversity is an optional feature. NOTE 6:
When CCDP operation mode is not provided only one half of the dual TX and RX paths (e.g. the H or V path) is relevant.
Figure 1: Block diagram 4.10 TMN interface Where provided, TMN interface shall follow relevant ITU-T and ITU-R Recommendations, and ENs/ETSs. NOTE: The standardization of TMN interface functionalities is under responsibility and development in ETSI TC TMN (formerly in TM2), and will be applicable to the radio relay systems considered in the present document. The management requirements (i.e. fault management, performance management, etc.) shall be compliant with the specification for a STM-1 rate defined in EN 300 417-7-1 [21], EN 301 167 [22] and in ITU-T Recommendations G.783 [23] and G.784 [24]. SIST EN 301 461 V1.3.1:2003

ETSI ETSI EN 301 461 V1.3.1 (2002-11) 14 4.11 Branching feeder and antenna requirements 4.11.1 Antenna radiation pattern The radiation pattern shall be in accordance with EN 300 833 [34]. See also clause A.1. 4.11.2 Antenna cross-polar discrimination The cross polarization discrimination shall be in accordance with EN 300 833 [34]. See also clause A.1. 4.11.3 Antenna Inter-Port Isolation (IPI) See clause A.1. 4.11.4 Waveguide flanges If a waveguide flange is used at point C/C', the following type shall be used in accordance with IEC 60154 [25]. Table 1: RF Waveguide interfaces Frequency band Waveguide flange 4 GHz UDR/UBR/PBR/CBR 40 5 GHz UDR/UBR/PBR/CBR 48 U6 GHz UDR/UBR/PBR/CBR 70 11 GHz UDR/PDR/CDR 100 UBR/PBR/CBR 100 UDR/PDR/CDR 120 UBR/PBR/CBR 120
4.11.5 Return Loss (RL) The minimum return loss of the branching system shall be 24 dB for indoor systems and 20 dB for partially outdoor systems. The measurement shall be referred to reference point C/C' towards the radio equipment and across a frequency band greater than or equal to 1,3 times the maximum symbol frequency foreseen for the equipment. Equipment according to the present document may also have system configurations with integral antennas or very similar technical solutions, without long feeder connections; return loss is not considered an important requirement. In these cases there shall be no requirement. For feeder/antenna RL information see clause A.1. 4.11.6 Intermodulation products When multi-channel branching system are concerned, in case the system is intended to comply with compatibility requirement in clause 4.3 c), each intermodulation product, caused by different transmitters linked to the same antenna branching system, shall be less than -110 dBm referenced to reference point C with an output power per transmitter relevant to the one referred in clause 5.3.1. NOTE: The reference power shall be the maximum power stated by the manufacturer for the equipment. This clause is not intended for conformance test, but only, if required, for type test agreed between user and manufacturer. The measurement, if any, will be carried out with unmodulated signals of the same power of the average level of the digital signals. SIST EN 301 461 V1.3.1:2003

ETSI ETSI EN 301 461 V1.3.1 (2002-11) 15 5 Parameters for digital systems 5.1 Transmission capacity The transmission capacities considered in the present document are:
• 2 x STM-1 (2 x 155,520 Mbit/s) and 2 x 139 264 Mbit/s in a 40 MHz RF channel using CCDP operation; • STM-1 (155,520 Mbit/s) and 139 264 Mbit/s in a 40 MHz RF channel using ACCP and no frequency reuse. 5.2 Baseband parameters 5.2.1 Plesiochronous interfaces The PDH interfaces at 140 Mbit/s may be used. They shall be compliant with ITU-T Recommendation G.703 [3]. These baseband signals shall be carried "open port", i.e. in a transparent manner independent of their content and they shall be mapped into a STM-1 signal as described in ITU-T Recommendation G.707 [1]. Parameters for service channels and wayside traffic channels are outside the scope of the present document. 5.2.2 SDH baseband interface The SDH baseband interface shall be in accordance with ITU-T Recommendations G.703 [3], G.707 [1], G.783 [23], G.784 [24], G.957 [2], and ETS 300 635 [26]. Two STM-1 interfaces are possible: • STM-1 optical interface (ITU-T Recommendation G.957 [2]); • STM-1 CMI electrical interface (ITU-T Recommendation G.703 [3]). The use of reserved bytes contained in the SOH, and their termination shall be in accordance with ITU-R Recommendation F.750-4 [27]. Further details on the possible use of the SOH bytes including additional RFCOH or RCSOH are given in ETSI TM4 document TR 101 035 [28]. 5.3 Transmitter characteristics The specified transmitter characteristics shall be met with the appropriate baseband signals applied at reference points Z' of figure 1. For PDH interfaces this shall be a PRBS in accordance with ITU-T Recommendation O.151 [29], for SDH interfaces this shall be in accordance with ITU-T Recommendation O.181 [30]. 5.3.1 Transmitter power range Transmitter maximum mean output power at reference point C' of the system block diagram (figure 1) shall not exceed +38 dBm (including tolerance and, if applicable, ATPC/RTPC influence). A capability for output power level adjustment may be required for regulatory purposes, in which case the range of adjustment, either by fixed or automatic attenuators, should be in steps of 5 dB or less. 5.3.2 Automatic Transmit Power Control ATPC is an optional feature. The manufacturer shall declare if the equipment is designated with ATPC as a fixed permanent feature. If implemented, the ATPC range shall not be less than 10 dB. SIST EN 301 461 V1.3.1:2003

ETSI ETSI EN 301 461 V1.3.1 (2002-11) 16 NOTE: For hop lengths of more than about 35 km an ATPC device with a range of more than 20 dB may be required for use on the same polarization on different antennas on the same route. Equipment with ATPC will be subject to Manufacturer declaration of ATPC range and related tolerances. Testing shall be carried out with output power level corresponding to: - ATPC set manually to a fixed value for system performance (clauses 5.5 and 5.6); - ATPC set at maximum provided power for TX spectral emissions (clause 5.3). Further information on ATPC is given in clause A.2. 5.3.3 Transmitter output power tolerance The nominal output power shall be declared by the supplier. The tolerance of the nominal output power shall be within: - for systems operating within non-weather protected locations classes 4.1 and 4.1E and within classes 3.3, 3.4 and 3.5 weather protected locations defined in EN 300 019 [17]:
nominal output power ±2 dB; - for systems operating within other classes of weather protected locations defined in EN 300 019 [17]:
nominal output power ±1 dB; The above limits are intended as ETSI voluntary requirements; from the point of view of declaration of conformity to article 3.2 of the R&TTE Directive [38], the power tolerance shall be: - nominal output power ±2 dB; within the environmental profile declared by the manufacturer for the intended limits of usage of the equipment. 5.3.4 TX local oscillator frequency arrangements There shall be no requirement on transmitter LO frequency arrangement. 5.3.5 RF spectrum mask The spectrum masks are shown in figures 3 and 4; in figure 3 masks are shown both for the normal channels and for the inner side of innermost channels on the same branching networks and fix a lower limit of -95 dB in order to control local interference between transmitters and receivers on same polarization. Spectrum masks in figure 3 are applicable to multi-channel systems (systems typically in fully indoor trunk applications) where all channels in both polarization are exploited under the same branching/antenna system and systems from different suppliers may be required to operate under the same branching system according clause 4.3 c). NOTE: Due to limitations of some spectrum analysers, difficulties may be experienced when
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