SIST EN 300 431 V1.4.1:2003

• Abstract:

  A) Update 5b spectrum masks in frequency bands up to 38 GHz. This will allow systems with software frequency tuning, and higher output power, without interfering with existing links. B) Add new design goal for 5a systems with respect to receiver sensitivity parameters for frequency bands 18-38GHz.

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.040.20 - Transmission systems
• ICS: 33.060.30 - Radio relay and fixed satellite communications systems
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• 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 300 431 V1.4.1 (2002-07) - Fixed Radio Systems; Point-to-point equipment; Parameters for radio system for the transmission of digital signals operating in the frequency range 24,50 GHz to 29,50 GHz

SIST EN 300 431 V1.4.1:2003 is the SIST adoption of ETSI EN 300 431 V1.4.1 for fixed radio systems, point-to-point equipment, in the 24.50 GHz to 29.50 GHz band. It specifies minimum RF and baseband parameters for digital radio links so manufacturers, operators, test labs, and regulators can plan, test, and license compatible point-to-point systems.

What does SIST EN 300 431 V1.4.1:2003 specify?

SIST EN 300 431 V1.4.1:2003 covers terrestrial fixed-service digital radio equipment used for point-to-point connections in local and regional networks. It focuses on compatibility between equipment on the same route and on the transmission quality of the system.

The document is organized into scope, references, symbols and abbreviations, general characteristics, and system parameters, followed by three annexes.

Annex	What it covers
Annex A	Additional information on channel arrangements, feeder/antenna return loss, ATPC, RBER, and co-channel/adjacent channel interference
Annex B	Normative system type codes for regulatory procedures
Annex C	Normative output power tolerance and RBER for class 5b systems

The scope also notes that antenna/feeder system requirements are covered by EN 300 833, while test procedures and test conditions are covered by EN 301 126-1.

What are the key requirements of SIST EN 300 431 V1.4.1:2003?

Frequency use, channeling, and system classes

SIST EN 300 431 V1.4.1:2003 uses the 24.50 GHz to 29.50 GHz range and ties channel arrangements to CEPT Recommendation T/R 13-02 or ITU-R Recommendation F.748-3. It defines classes based on spectrum efficiency and links them to typical bit rates and channel spacings.

This matters in practice because a supplier must choose the right class and channel spacing for the planned capacity and must be able to identify the system type for licensing. The document also states that systems may use separate antennas or separate polarizations on the same antenna, and that vertical and/or horizontal polarization shall be possible where required.

Transmission, power, and spectrum limits

SIST EN 300 431 V1.4.1:2003 sets a maximum mean transmitter output power of +30 dBm at the reference point, with optional ATPC, RTPC, and RFC features handled by manufacturer declaration and verification. The RF spectrum mask is a central requirement, with different masks for class 2, class 4, class 5a, and class 5b systems.

In practice, this means the transmitter must stay inside the mask across the declared power-control range, and the emission shape must fit the capacity and spacing of the link. The document also limits discrete CW lines, spurious emissions, and radio-frequency tolerance, so the transmitter does not disturb adjacent links.

Receiver performance and interference behavior

SIST EN 300 431 V1.4.1:2003 gives receiver sensitivity targets as BER thresholds versus RSL and specifies co-channel and adjacent-channel interference behavior. It also defines RBER expectations, including cases with first adjacent-channel interference, and includes special guidance for class 5a and class 5b systems.

For the reader, this means link design is not only about getting a signal through, but about proving that the receiver still meets error-performance targets when neighboring channels are active. The standard also states that space diversity receive and multipath outage are not relevant for these systems.

Interfaces, environment, and management

SIST EN 300 431 V1.4.1:2003 covers PDH interfaces, SDH baseband interfaces, TMN-related functions, environmental classes, power supply interfaces, and EMC. It also points to specific connector and waveguide flange types where flanges are used.

This matters because procurement and conformity testing need the equipment to match the declared interface type, installation environment, and regulatory EMC expectations.

What terms does SIST EN 300 431 V1.4.1:2003 define?

• ATPC - Automatic Transmit Power Control, an optional feature that changes transmitter power to suit link conditions.
• RTPC - Remote Transmit Power Control, an optional feature where transmitter power is adjusted remotely.
• RFC - Remote Frequency Control, an optional feature for changing frequency within a declared range.
• RSL - Receive Signal Level, the received level used to assess BER performance.
• RBER - Residual BER, the error rate measured under simulated operating conditions after system processing.
• XPD - cross-Polar Discrimination, a measure of separation between orthogonal polarizations.
• TMN - Telecommunications Management Network, the management interface context for SDH equipment.

Who uses SIST EN 300 431 V1.4.1:2003?

Manufacturers use SIST EN 300 431 V1.4.1:2003 when designing point-to-point radio equipment for the 24.50 GHz to 29.50 GHz band. Test laboratories use it to check spectrum masks, BER performance, interference sensitivity, and declared control ranges.

Network operators and planners use it when selecting channel spacing, polarization use, and power-control features for local, regional, or nodal radio links. Regulatory authorities use Annex B system type codes and the channel arrangements when licensing equipment.

What changed in SIST EN 300 431 V1.4.1:2003 from the previous edition?

The foreword says this version modifies the class 5b spectrum mask to allow more practical implementations and adds proposed design objectives for class 5a BER versus RSL.

The scope also states these revisions and adds:

• unique system type codes for regulatory reference
• additional higher-spectrum-efficiency class 4 systems
• revised spectrum mask and adjacent-channel selectivity for STM-0 systems in 28 MHz spacing to align with EN 300 639
• new class 5 spectrum-efficiency options for STM-1 capacity, including 5a and 5b
• a changed class 4 mask for 140 Mbit/s to 155 Mbit/s systems at f5 to align with 23 GHz and 38 GHz standards

Which standards are used with SIST EN 300 431 V1.4.1:2003?

Reference	Contribution
CEPT Recommendation T/R 13-02	Preferred channel arrangements in 22.0 GHz to 29.5 GHz
ITU-R Recommendation F.748-3	Radio-frequency arrangements for the fixed service in the 25 GHz, 26 GHz, and 28 GHz bands
ETSI EN 301 126-1	Definitions, general requirements, and test procedures for conformance testing
ETSI EN 300 833	Antenna radiation patterns, XPD, and IPI for point-to-point antennas
ETS 300 019	Environmental classes and test severity
ETS 300 132-1 and EN 300 132-2	Power supply interfaces
EN 300 385 and EN 301 489-1 / EN 301 489-4	EMC requirements
ITU-T G.703, G.707, G.708, G.783, G.784, G.957	PDH and SDH interfaces, mapping, functional blocks, management, and optical interfaces
CEPT ERC/REC 74-01	Spurious emission limits
EN 300 639	Mask alignment for STM-0-related spectrum characteristics

What does the SIST EN 300 431 V1.4.1:2003 document contain?

The document contains channel arrangements, bit-rate to channel-spacing tables, spectrum-mask figures, analyser settings for mask measurements, and tables for BER thresholds and interference sensitivity. It also includes transmitter and receiver sections with optional ATPC, RTPC, and RFC behavior, plus spurious-emission rules for external and internal cases.

Annex A adds background material and worked channel arrangements for the two frequency sub-bands. Annex B gives the regulatory system type codes, and Annex C gives the class 5b options for output power tolerance and adjacent-channel RBER behavior.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Fixed Radio Systems; Point-to-point equipment; Parameters for radio system for the transmission of digital signals operating in the frequency range 24,50 GHz to 29,50 GHz33.060.30Radiorelejni in fiksni satelitski komunikacijski sistemiRadio relay and fixed satellite communications systems33.040.20Prenosni sistemTransmission systemsICS:Ta slovenski standard je istoveten z:EN 300 431 Version 1.4.1SIST EN 300 431 V1.4.1:2003en01-december-2003SIST EN 300 431 V1.4.1:2003SLOVENSKI
STANDARD
ETSI ETSI EN 300 431 V1.4.1 (2002-07)2
Reference REN/TM-04149-3 Keywords architecture, DRRS, PDH, point-to-point, radio, SDH, transmission ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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Important notice Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, send your comment to: [e-mail] Copyright Notification No 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 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 300 431 V1.4.1:2003

ETSI ETSI EN 300 431 V1.4.1 (2002-07)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.10 4 General characteristics.10 4.1 Frequency bands and channel arrangements.10 4.1.1 Channel arrangements.10 4.1.2 Channel spacing for systems operating on the same route.11 4.2 Compatibility requirements between systems.11 4.3 Performance and availability requirements.11 4.4 Environmental conditions.11 4.4.1 Equipment within weather protected locations (indoor locations).12 4.4.2 Equipment for non-weather protected locations (outdoor locations).12 4.5 Power supply.12 4.6 Electromagnetic compatibility.12 4.7 System block diagram.12 4.8 Telecommunications Management Network (TMN) interface.13 4.9 Branching/feeder/antenna characteristics.13 4.9.1 Antenna radiation patterns.13 4.9.2 Antenna cross-Polar Discrimination (XPD).13 4.9.3 Antenna Inter-Port Isolation (IPI).13 4.9.4 Waveguide flanges (or other connectors).13 4.9.5 Return loss.13 5 System Parameters.14 5.1 Transmission capacity.14 5.2 Baseband parameters.14 5.2.1 Plesiochronous interfaces.14 5.2.2 SDH baseband interface.14 5.3 Transmitter characteristics.15 5.3.1 Transmitter power range.15 5.3.2 Transmit power and frequency control.15 5.3.2.1 Automatic Transmit Power Control (ATPC).15 5.3.2.2 Remote Transmit Power Control (RTPC).15 5.3.2.3 Remote Frequency Control (RFC).16 5.3.3 Transmitter output power tolerance.16 5.3.4 Transmit Local Oscillator (LO) frequency arrangements.16 5.3.5 RF spectrum mask.16 5.3.6 Discrete CW lines exceeding the spectrum mask limit.19 5.3.6.1 Spectral lines at the symbol rate.19 5.3.6.2 Other spectral lines.19 5.3.7 Spurious emissions.20 5.3.7.1 Spurious emissions - external.20 5.3.7.2 Spurious emissions - internal.21 5.3.8 Radio frequency tolerance.21 5.4 Receiver characteristics.21 5.4.1 Input level range.21 5.4.2 Receiver local oscillator frequency arrangements.21 5.4.3 Spurious emissions.21 5.4.3.1 Spurious emissions - internal.21 5.5 System performance without diversity.21 SIST EN 300 431 V1.4.1:2003

ETSI ETSI EN 300 431 V1.4.1 (2002-07)4
5.5.1 BER as a function of Receiver input Signal Level (RSL).22 5.5.2 Equipment Residual BER.22 5.5.3 Interference sensitivity.23 5.5.3.1 Co-channel interference sensitivity.23 5.5.3.2 Adjacent channel interference.24 5.5.3.3 CW spurious interference.24 5.5.3.4 Front-end non-linearity requirements (two-tone CW spurious interference).25 5.5.4 Distortion sensitivity.25 5.6 System characteristics with diversity.25 Annex A (informative): Additional information.26 A.1 Radio frequency channel arrangement.26 A.1.1 Frequency band 24,50 GHz to 26,50 GHz.26 A.1.2 Frequency band 27,50 GHz to 29,50 GHz.27 A.2 Feeder/antenna return loss.28 A.3 Automatic Transmit Power Control (ATPC).28 A.4 RBER.29 A.5 Co-channel and adjacent channel interference.30 Annex B (normative): System type codes for regulatory procedures.34 Annex C (normative): Output power tolerance and RBER.35 History.36
ETSI ETSI EN 300 431 V1.4.1 (2002-07)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). This new version modifies only class 5b spectrum mask giving more allowance for practical implementations, without modifying any other requirements, and proposed design objectives for class 5a BER versus RSL.
National transposition dates Date of adoption of this EN: 12 July 2002 Date of latest announcement of this EN (doa): 31 October 2002 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
30 April 2003 Date of withdrawal of any conflicting National Standard (dow): 30 April 2003
ETSI ETSI EN 300 431 V1.4.1 (2002-07)6
1 Scope The present document specifies the minimum performance parameters for terrestrial fixed service radio communications equipments operating in the frequency range 24,50 GHz to 29,50 GHz and contains a revision from the previous version, in the areas of: - introduction of unique system type codes for regulatory reference to the various system types detailed in the present document, refer to new annex C and related categories of equipment classes of spectral efficiency; - additional systems with higher spectrum efficiency in the new class 4 systems; - change of spectrum mask and adjacent channel selectivity of STM-0 systems in 28 MHz channel spacing to align to EN 300 639 [34]; - introduction of new spectrum efficiency class 5 for STM-1 capacity for 28 MHz Adjacent Channel Alternate-Polarization (ACAP as class 5a) and Adjacent Channel Co-Polarization (ACCP as class 5b), see examples of the spectrum usage in figures 1.1a and 1.1b;
- change to spectrum mask for class 4 (140 Mbit/s to 155 Mbit/s) at "f5" to align with the mask used in the 23 GHz and 38 GHz standards. NOTE: In a previous version (ETS 300 431 [37]), there was provision for: - further options for Grade A digital radio systems (with 112 MHz channel separation); - specific antenna radiation patterns (now superseded by EN 300 833 [3]). These options are not reprinted in the present document as they are considered to be no longer of interest for ETSI members. However, for regulatory purposes, they may still be referenced from ETS 300 431 [37]. Digital systems are intended to be used for point-to-point connections in local and regional networks at data rates between 2 Mbit/s and the Synchronous Transport Module, level 1 (STM-1). The parameters to be specified fall into two categories: a) those that are 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. b) parameters defining the transmission quality of the proposed system. The present document deals with Radio Frequency (RF) and baseband characteristics relevant to low, medium and high capacity Plesiochronous Digital Hierarchy (PDH) transmission systems, STM-0 and STM-1 Synchronous Digital Hierarchy (SDH) transmission systems. Antenna/feeder system requirements are covered in EN 300 833 [3]. SIST EN 300 431 V1.4.1:2003

ETSI ETSI EN 300 431 V1.4.1 (2002-07)7
For digital systems, with capacities up to 34 Mbit/s, for class 2 equipment there are also two types of equipment specified: - grade A equipment, intended for applications where moderate frequency congestion is envisaged; - the deployment of grade A equipment in new links will be limited and stopped over a period of time. Therefore, it is likely that provision for grade A equipment will be removed from the present document during the next revision; - grade B equipment, intended for applications where higher nodal capacity is required. The present document does not contain aspects related to test procedures and test conditions, however they are to be found in EN 301 126-1 [2]. As the maximum transmission rate in a given bandwidth depends on system spectral efficiency, different equipment classes are defined: class 2: equipment spectral efficiency based on typically 4-states modulation scheme (e.g. 4-FSK, 4-QAM, or equivalent); class 3: equipment spectral efficiency based on typically 8-states modulation scheme (e.g. 8PSK, or equivalent); class 4: equipment spectral efficiency based on typically 16 or 32-states modulation scheme (e.g. 16-QAM, 32-QAM, or equivalent); class 5: equipment spectral efficiency based on typically 64 or 128-states modulation scheme (e.g. 64-QAM, 128-QAM, or equivalent). The above classes are indicative only and do not imply any constraint to the actual modulation format, provided that all the requirements in the present document are met. Safety aspects will not be considered in the present document. However compliance to EN 60950 [35] will be required to comply with Directive 1999/5/EC [36] (R&TTE). Technical background for most of the parameters and requirements referred in the present document may be found in TR 101 036-1 [21]. 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] CEPT Recommendation T/R 13-02: "Preferred channel arrangements for fixed services in the range 22,0-29,5 GHz". [2] ETSI EN 301 126-1: "Fixed Radio Systems; Conformance testing; Part 1: Point-to-point equipment - Definitions, general requirements and test procedures". [3] 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". [4] ITU-R Recommendation F.748: "Radio-frequency arrangements for systems of the fixed service operating in the 25, 26 and 28 GHz bands".[5] ETSI EN 300 645: "Telecommunications Management Network (TMN); Synchronous Digital Hierarchy (SDH) radio relay equipment; Information model for use on Q interfaces". SIST EN 300 431 V1.4.1:2003

ETSI ETSI EN 300 431 V1.4.1 (2002-07)8
[6] ETSI ETS 300 019 (all parts): "Equipment Engineering (EE); Environmental conditions and environmental tests for telecommunications equipment". [7] 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". [8] ETSI EN 300 132-2: "Environmental Engineering (EE); Power supply interface at the input to telecommunications equipment; Part 2: Operated by direct current (dc)". [9] ETSI EN 300 385: "Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for fixed radio links and ancillary equipment". [10] ETSI ETS 300 635: "Transmission and Multiplexing (TM); Synchronous Digital Hierarchy (SDH); Radio specific functional blocks for transmission of Mx STM-N". [11] ETSI ETS 300 785: "Transmission and Multiplexing (TM); Synchronous Digital Hierarchy (SDH); Radio specific functional blocks for transmission of M x sub-STM-1". [12] ITU-R Recommendation F.750: "Architectures and functional aspects of radio-relay systems for synchronous digital hierarchy (SDH)-based network".[13] ITU-R Recommendation F.751: "Transmission characteristics and performance requirements of radio-relay systems for SDH-based networks". [14] ITU-R Recommendation F.1102: "Characteristics of fixed wireless systems operating in frequency bands above about 17 GHz".[15] ITU-R Recommendation F.1189: "Error performance objectives for constant bit rate digital paths at or above the primary rate carried by digital radio-relay systems which may form part or all of the national portion of a 27 500 km hypothetical reference path".[16] ITU-R Recommendation F.1191: "Bandwidths and unwanted emissions of digital fixed service systems".[17] ITU-R Recommendation P.530: "Propagation data and prediction methods required for the design of terrestrial line-of-sight systems". [18] ITU-T Recommendation G.703: "Physical/electrical characteristics of hierarchical digital interfaces". [19] ITU-T Recommendation G.707: "Network node interface for the synchronous digital hierarchy (SDH)". [20] ITU-T Recommendation G.773: "Protocol suites for Q-interfaces for management of transmission systems". [21] 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". [22] IEC 60154-2: "Flanges for waveguides; Part 2: Relevant specifications for flanges for ordinary rectangular waveguides". [23] ITU-T Recommendation G.783: "Characteristics of synchronous digital hierarchy (SDH) equipment functional blocks". [24] ITU-T Recommendation G.784: "Synchronous digital hierarchy (SDH) management". [25] ITU-T Recommendation G.826: "Error performance parameters and objectives for international, constant bit rate digital paths at or above the primary rate". [26] ITU-T Recommendation G.708: "Sub STM-0 network node interface for the synchronous digital hierarchy (SDH)". SIST EN 300 431 V1.4.1:2003

ETSI ETSI EN 300 431 V1.4.1 (2002-07)9
[27] ITU-T Recommendation G.957: "Optical interfaces for equipments and systems relating to the synchronous digital hierarchy". [28] ITU-T Recommendation O.151: "Error performance measuring equipment operating at the primary rate and above". [29] ITU-T Recommendation O.181: "Equipment to assess error performance on STM-N interfaces". [30] IEC 60153-2: "Hollow metallic waveguides. Part 2: Relevant specifications for ordinary rectangular waveguides". [31] CEPT ERC/REC 74-01: "Spurious Emissions". [32] ETSI TR 101 035: "Transmission and Multiplexing (TM); Synchronous Digital Hierarchy (SDH) aspects regarding Digital Radio Relay Systems (DRRS)". [33] Council Directive 89/336/EEC of 3 May 1989 on the approximation of the laws of the Member States relating to electromagnetic compatibility. [34] ETSI EN 300 639: "Fixed Radio Systems; Point-to-point equipment; Sub-STM-1 digital radio systems operating in the 13 GHz, 15 GHz and 18 GHz frequency bands with about 28 MHz co-polar and 14 MHz cross-polar channel spacing". [35] EN 60950: "Safety of information technology equipment". [36] 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. [37] ETSI ETS 300 431: "Transmission and Multiplexing (TM); Digital fixed point-to-point radio link equipment operating in the frequency range 24,25 GHz to 29,50 GHz". [38] 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". [39] 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". [40] ERC/DEC(99)09:"ERC Decision of 10 March 1999 on the adoption of approval regulations for equipment to be used for digital point-to-point radio relay systems operating in fixed service between 24.25 and 29.50 GHz, based on the European Telecommunications Standard (ETS) 300 431. 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 milliwatt GHz GigaHertz kHz kiloHertz Mbit/s Megabits per second MHz MegaHertz n.a. not applicable ppm parts per million SIST EN 300 431 V1.4.1:2003

ETSI ETSI EN 300 431 V1.4.1 (2002-07)10 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: ac alternating current ACAP Adjacent Channel Alternate Polarization ACCP Adjacent Channel Co-Polarization ATPC Automatic Transmit Power Control AU Administrative Unit BBER Background Block Error Rate BER Bit Error Rate C/I Carrier to Interference ratio CMI Coded Mark Inversion CSmin minimum practical Channel Separation (for a given radio-frequency channel arrangement) CW Continuous Wave dc direct current DRRS Digital Radio Relay Systems EIRP Equivalent Isotropically Radiated Power EMC ElectroMagnetic Compatibility ESR Errored Second Ratio FSK Frequency-Shift Keying (modulation) IF Intermediate Frequency IPI Inter-Port Isolation LO Local Oscillator PDH Plesiochronous Digital Hierarchy PRBS Pseudo Random Binary Sequence QAM Quadrature Amplitude Modulation RBER Residual BER RF Radio Frequency RFC Remote Frequency Control RSL Receive Signal Level RTPC Remote Transmit Power Control Rx Receiver SDH Synchronous Digital Hierarchy SOH Section OverHead STM-0 medium capacity SDH radio Transport Module 51,840 Mbit/s AU-3 equivalent STM-N Synchronous Transport Module, level N sub-STM-0 low capacity SDH radio Transport Module (n times VC-12 or VC2 equivalent) TMN Telecommunications Management Network Tx Transmitter VC Virtual Container XPD cross-Polar Discrimination 4 General characteristics 4.1 Frequency bands and channel arrangements 4.1.1 Channel arrangements The frequency range is 24,50 GHz to 29,50 GHz. The channel plan shall be in accordance with CEPT Recommendation T/R 13-02 [1] or ITU-R Recommendation F.748-3 [4]. For reader convenience, the basic parameters of the CEPT Recommendation are shown in annex A. SIST EN 300 431 V1.4.1:2003

ETSI ETSI EN 300 431 V1.4.1 (2002-07)11 4.1.2 Channel spacing for systems operating on the same route System bit rates and their relevant channel spacing in the present document are reported in table 1 (for the precise payload bit rates, see clause 5.1). NOTE: According to systems characteristics the equipment can be connected either to separate antennas or on a separate polarization to the same antenna. Table 1: Digital systems channel spacings for various bit rates
Payload Bit Rate [Mbit/s] 2 2 × 2 8 2 × 8 34 51 140 and 155 Channel
Class 2 equipments
3,5 3,5 7 14 28 56
Spacings [MHz] Class 4 equipments
3,5 7 14 14/28
Class 5 equipments
NOTE: n × 2 Mbit/s and n × 34 Mbit/s bit rates may be used where appropriate.
n × 2 Mbit/s mapped into SDH VC12 transport bit rates (sub-STM-0 defined by ITU-T Recommendation G.708 [26]) may be used where appropriate (e.g. three or four times VC12 into an 8 Mbit/s channel spacing).
The class 2, 2 Mbit/s in 3,5 MHz and the class 4 in 28 MHz reflects equipment more typical to a class 1 (2 Mbit/s) and class 3 (STM-0) system and as a result the adjacent channel interference parameters are more stringent.
For regulatory purposes in national procedures for licensing radio equipments according to the present document, the above system types shall be identified by the "system type codes" reported in annex C. 4.2 Compatibility requirements between systems The compatibility requirements between systems are as follows: - there shall be no requirement to operate transmitting equipment from one manufacturer with receiving equipment from another; - there shall not be a requirement to multiplex different manufacturers equipment on the same polarization of the same antenna; - there may be a requirement to multiplex different manufacturers equipment on different polarization of the same antenna. This will not apply to systems with integral antenna; - depending on the application, it shall be possible to operate the system in vertical and/or horizontal polarization, if required by the channel arrangement. 4.3 Performance and availability requirements Digital equipment shall be designed in order to meet network performance and availability requirements foreseen by ITU-T Recommendation G.826 [25], following the criteria defined in ITU-R Recommendation F.1189 [15] for the national portion of the digital connection. The implication of the link design on the performance is recognized and the general design criteria reported in ITU-R Recommendations P.530 [17] and F.1102 [14] shall be applied. 4.4 Environmental conditions The equipment shall be required to meet the environmental conditions set out in ETS 300 019 [6] which defines weather protected and non-weather protected locations, classes and test severity. The manufacturer shall state which class the equipment is designed to withstand. SIST EN 300 431 V1.4.1:2003

ETSI ETSI EN 300 431 V1.4.1 (2002-07)12 4.4.1 Equipment within weather protected locations (indoor locations) Equipment intended for operation within temperature controlled locations or partially temperature controlled locations should meet the requirements of ETS 300 019 [6] classes 3.1 and 3.2 respectively. Optionally, the more stringent requirements of ETS 300 019 [6] classes 3.3 (non-temperature controlled locations), 3.4 (sites with heat trap) and 3.5 (sheltered locations) may be applied. 4.4.2 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 [6], class 4.1 or 4.1E. Class 4.1 applies to many European countries and class 4.1E applies to all European countries. 4.5 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 [7] and EN 300 132-2 [8]. NOTE: Some applications may require secondary voltages that are not covered by ETS 300 132-1 [7] and EN 300 132-2 [8]. 4.6 Electromagnetic compatibility Equipment shall operate under the conditions specified in EN 300 385 [9] or relevant parts of EN 301 489-1 [38] and EN 301 489-4 [39]. 4.7 System block diagram MODULATORTRANSMITTERZ'E'A'TRANSMITRF FILTERB'BRANCHINGC'D'FEEDERFEEDERBRANCHINGRF FILTERD(*)CBRECEIVEARECEIVEREDEMODULATORZ(*) NO FILTERING INCLUDED(*) NOTE 1: For the purpose of defining the measurement points, the branching network does not include a hybrid. NOTE 2: The points shown above are reference points only; points C and C', D and D' in general coincide. NOTE 3: Points B and C, B' and C' may coincide when simple duplexer is used.
Figure 2: System block diagram SIST EN 300 431 V1.4.1:2003

ETSI ETSI EN 300 431 V1.4.1 (2002-07)13 4.8 Telecommunications Management Network (TMN) interface For SDH equipment ITU-T Recommendations G.784 [24] and G.773 [20] and ITU-R Recommendations F.750 [12] and F.751 [13] give the general requirements for TMN interface and functionality. ETS 300 635 [10], ETS 300 785 [11] and EN 300 645 [5] give the radio specific functional block description and the related radio fragment information model respectively. NOTE: The standardization of TMN interface functionality is under study in ETSI TMN and will be applicable to the radio relay systems considered in the present document. 4.9 Branching/feeder/antenna characteristics 4.9.1 Antenna radiation patterns See EN 300 833 [3]. 4.9.2 Antenna cross-Polar Discrimination (XPD) See EN 300 833 [3]. 4.9.3 Antenna Inter-Port Isolation (IPI) See EN 300 833 [3]. 4.9.4 Waveguide flanges (or other connectors) When flanges are required at reference point C, C', the following shall be used according to IEC 60154-2 [22]: - UBR/PBR/CBR 260, for the complete frequency range 24,50 GHz to 29,50 GHz; - UBR/PBR/CBR 220, for the lower part of the frequency range; - UBR/PBR/CBR 320, for the higher part of the frequency range. NOTE 1: The upper frequency limit for waveguide R 220 is 26,50 GHz, according to IEC 60153-2 [30]. NOTE 2: The lower frequency limit for waveguide R 320 is 26,50 GHz, according to IEC 60153-2 [30]. 4.9.5 Return loss Equipment according to the present document is likely to have integral antennas or very similar technical solutions, without long feeder connections; return loss is not considered an essential requirement. When an antenna is an integral part of the equipment there shall be no requirement. For feeder/antenna return loss requirement see annex A. SIST EN 300 431 V1.4.1:2003

ETSI ETSI EN 300 431 V1.4.1 (2002-07)14 5 System Parameters 5.1 Transmission capacity Payload bit rates considered in the present document are: - 2,048 Mbit/s; - 2 × 2,048 Mbit/s; - 8,448 Mbit/s; - 2 × 8,448 Mbit/s; - 34,68 Mbit/s; - 51,840 Mbit/s (STM-0); - 139,264 Mbit/s; and - 155,520 Mbit/s (STM-1). System rates configured as n-times 2 Mbit/s or n-times 34 Mbit/s or n-times 2 Mbit/s mapped into SDH VC-12 (sub-STM-0) are also considered. In the following clauses, these capacities will be simply referred as 2 Mbit/s, 2 × 2 Mbit/s, 8 Mbit/s, 2 × 8 Mbit/s, 34 Mbit/s, 51 Mbit/s (STM-0), 140 Mbit/s, and 155 Mbit/s (STM-1) respectively. 5.2 Baseband parameters All the following specified baseband parameters refer to point Z and Z' of figure 2. Parameters for service channels and wayside traffic channels are outside the scope of the present document. 5.2.1 Plesiochronous interfaces Plesiochronous interfaces at 2 Mbit/s, 8 Mbit/s, 34 Mbit/s and 140 Mbit/s shall comply with ITU-T Recommendation G.703 [18]. 5.2.2 SDH baseband interface The SDH baseband interface shall be in accordance with ITU-T Recommendations G.703 [18], G.707 [19], G.783 [23], G.784 [24] and G.957 [27] and ITU-R Recommendations F.750 [12] and F.751 [13]. For sub-STM-0 rates ITU-T Recommendation G.708 [26] mapping applies. Two STM-1 interfaces shall be possible: - Coded Mark Inversion (CMI) electrical (ITU-T Recommendation G.703 [18]); and - optical (ITU-T Recommendation G.957 [27]). The use of reserved bytes contained in the Section OverHead (SOH), and their termination shall be in accordance with ITU-R Recommendations F.750 [12], F.751 [13] and for sub-STM-0 with ITU-T Recommendation G.708 [26]. NOTE: Further details on the possible use of the SOH bytes reserved for future international standardization are given in TR 101 035 [32]. SIST EN 300 431 V1.4.1:2003

ETSI ETSI EN 300 431 V1.4.1 (2002-07)15 5.3 Transmitter characteristics The specified transmitter characteristics shall be met with the appropriate baseband signals applied at reference point Z' of figure 2. For PDH interface this shall be a Pseudo Random Binary Sequence (PRBS) according to ITU-T Recommendation O.151 [28] while for SDH interface ITU-T Recommendation O.181 [29] test signal applies. 5.3.1 Transmitter power range Transmitter maximum mean output power at reference point C' of the system block diagram (see figure 2) shall not exceed +30 dBm (including tolerance and, if applicable, ATPC/RTPC influence). Regulatory administrations may define nominal sub-ranges below this maximum limit. NOTE: The technological evolution may result in equipment falling outside of the range(s) foreseen in this clause. In this case the equipments of different output power sub-ranges are not considered to require individual type approval, however their use is subject to individual national agreements. 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 Transmit power and frequency control 5.3.2.1 Automatic Transmit Power Control (ATPC) ATPC is an optional feature. Equipment with ATPC will be subject to manufacturer declaration of ATPC ranges and related tolerances. The manufacturer shall declare if the equipment is designed with ATPC as a fixed permanent feature. Testing shall be carried out with output power level corresponding to: - ATPC set manually to a fixed value for system performance (see clauses 5.5 and 5.6); - ATPC set at maximum available power for transmit performance (see clause 5.3). It shall be verified that the emitted RF spectrum is within the absolute RF spectrum mask evaluated for the maximum available output power of the equipment, including the attenuation introduced by RTPC, if any. NOTE: Where the use of ATPC is considered compulsory for regulatory purposes the transmitter output power should meet the spectrum mask limits throughout the ATPC range. 5.3.2.2 Remote Transmit Power Control (RTPC) RTPC is an optional feature. Equipment with RTPC will be subject to manufacturer declaration of RTPC ranges and related tolerances. Testing shall be carried out with output power level corresponding to: - RTPC set to the maximum nominal power for transmit performance (see clause 5.3) and for system performance (see clauses 5.5 and 5.6). The RF spectrum mask shall be verified in three points (low, medium, and high) of the RTPC power excursion and with ATPC set to maximum available power (if any). When these spectrum measurements are made difficulties may be experienced. Actual measurement methods shall be addressed in further investigations and will be defined in the conformance testing standard, EN 301 126-1 [2]. RTPC range should be restricted, taking into account the wideband noise generated by the transmitter chain, to ensure the spectrum mask requirements are met throughout the transmitter output power range. NOTE: Where the use of ATPC is considered compulsory for regulatory purposes the transmitter output power should meet the spectrum mask limits throughout the ATPC range. SIST EN 300 431 V1.4.1:2003

ETSI ETSI EN 300 431 V1.4.1 (2002-07)16 5.3.2.3 Remote Frequency Control (RFC) RFC is an optional feature. Equipment with RFC will be subject to manufacturer declaration of RFC ranges and related change frequency procedure. Testing shall be carried out including: - RFC setting procedure at least for three frequencies (lower, centre and higher of the covered range); - RFC setting procedure shall not produce emissions outside the previous and final frequency spectrum mask. 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: - nominal output power ±2 dB: for classes 3.1 and 3.2 as defined by ETS 300 019 [6]; - nominal output power ±2 dB: for classes 3, 4 and 5 systems operating within non-weather protected locations
and within classes 3.3, 3.4 and 3.5 weather protected locations; - nominal output power ±3 dB: for grade A systems operating within non-weather protected locations and within
classes 3.3, 3.4 and 3.5 weather protected locations. For class 5b systems refer to the annex D for further details. 5.3.4 Transmit Local Oscillator (LO) frequency arrangements There shall be no requirement on transmit LO frequency arrangement. 5.3.5 RF spectrum mask The spectrum masks are shown in figures 3a to 3d. The 0 dB level shown on the spectrum masks relates to the spectral power density of the nominal centre frequency disregarding residual carrier. Masks shall be measured with a modulating base-band signal given by a PRBS signal given in ITU-T Recommendation O.151 [28] in the case of PDH signal or ITU-T Recommendation O.181 [29] in the case of STM-1 signal. The masks for class 2 systems include an allowance for frequency tolerance (see note) while for class 3, 4 and 5 systems it does not include frequency tolerance. NOTE: The frequency tolerance includes both short term (environmental) and long term (ageing) tolerance. The recommended spectrum analyser settings for measuring the RF spectrum mask detailed in figures 3a to 3d are shown in table 2. Table 2: Spectrum analyser settings for RF power spectrum measurement Channel spacing [MHz] 3,5 7 14 28 56 Sweep width [MHz] 20 40 80 160 320 Scan time
Auto Auto Auto Auto Auto IF bandwidth [kHz] 30 30 30 100 100 Video bandwidth [kHz] 0,1 0,3 0,3 0,3 0,3
ETSI ETSI EN 300 431 V1.4.1 (2002-07)17 f00-10-30-50-60+K1[dB]TransmitterSpectralPower Density[dB]f1f2f3f4-23-45Class
2f5 NOTE: Frequency expresses from nominal transmitter centre frequency [MHz].
Figure 3a: Limits of spectral power density for class 2 systems
f0
- 10
- 30
- 50
- 60
+K1[dB]
Transmitter
Spectral
Power Density
f1
f3
f4
- 35
f6
[
dB]
f5
Class 4
All other rates
f2
Class 4
51Mbit/s in
28 MHz spacin g only
NOTE: Frequency expresses from nominal transmitter centre frequency [MHz].
Figure 3b: Limits of spectral power density for class 4 systems SIST EN 300 431 V1.4.1:2003

ETSI ETSI EN 300 431 V1.4.1 (2002-07)18
f0 0 -10 -50 -60 +K1[dB] Transmitter Spectral Power Density f1 f2 f3 f4 -35 f5 [ dB] -32 f6 -55 See table 3 note 2 (f5)
NOTE: Frequency expresses from actual transmitter centre frequency [MHz].
Figure 3c: Limits of spectral power density for Class 5a systems f0 0 -10 -50 -60 +K1[dB] Transmitter Spectral Power Density f1 f2 f3 f4 f5 [ dB] -32 f6 f7 -36 -55 See table 3 note 2 -45 (f6)
NOTE: Frequency expresses from actual transmitter centre frequency [MHz].
Figure 3d: Limits of spectral power density for Class 5b systems Due to limitations of some spectrum analysers, difficulties may be experienced when testing high capacity/wideband systems. In this event, the following options are to be considered: measurement using high performance spectrum analyser, use of notch filters and two step measurement technique. Where difficulties are experienced, the plots of one test conducted at ambient and environmental extremes, may be produced as evidence to conformance to the spectrum mask. SIST EN 300 431 V1.4.1:2003

ETSI ETSI EN 300 431 V1.4.1 (2002-07)19 Reference frequencies f 1 to f 7 and relative attenuation K1[dB] are reported in table 3 for the bit rate and channel spacing foreseen. Table 3: Spectrum mask frequency limits Spectrum efficiency class Bit-rate [Mbit/s] Channel spacing [MHz] System grade Figure K1 [dB] f 1 [MHz] f 2 [MHz] f 3 [MHz] f 4 [MHz] f 5 [MHz] f 6 [MHz] f 7 [MHz]
2 3,5 A
+2 1,3 2 2,3 4,3 8,75 n.a. n.a.
2 × 2 3,5 A
+2 1,4 2,8 3,5 7 8,75 n.a. n.a.
8 7 A
+2 2,8 5,6 7 14 17,5 n.a. n.a.
34 28 A
[phone] n.a. n.a. 2 2 3,5 B 3a +1 1,3 2 2,3 4,3 8,75 n.a. n.a.
2 × 2 3,5 B
+1 1,4 2,8 3,5 7 8,75 n.a. n.a.
8 7 B
+1 2,8 5,6 7 14 17,5 n.a. n.a.
2 × 8 14 B
+1 5,6 11,2 14 28 35 n.a. n.a.
34 28 B
[phone] n.a. n.a.
51 56 B
[phone] n.a. n.a.
8 3,5 n.a.
+1 1,4 n.a. 2,8 3,5 6,15 8,75 n.a. 4 2 × 8 7 n.a. 3b +1 2,8 n.a. 5,6 7 12,25 17,5 n.a.
34 14 n.a.
+1 5,6 n.a
...