User Manual SRT1F

User Manual SRT 1F Synchronous Radio for Trunk Applications

UMN

911-362/02C0000

Issue 1, July 2002

UMN SRT 1F

911-362/02C0000 Issue 1, July 2002

Siemens Mobile Communications S.p.A. 2002 V.le Piero e Alberto Pirelli, 10 I-20126 Milano Issued by Customer Documentation Department S.S. 11 Padana Superiore, km 158 I-20060 Cassina de Pecchi MI Copyright (C) Fujitsu/Siemens 2002 Technical modifications possible without notice to customers. Technical specifications and features are binding only insofar as they are specifically and expressly agreed upon in a written contract.

UMN Table of Contents

911-362/02C0000 Issue 1, July 2002 i

1 GENERAL DESCRIPTION .......................................................................................1-1 1.1 General description.................................................................................1-1 1.1.1 Introduction to the SRT 1F Radio Equipment..........................................1-1 1.1.2 Equipment Features ...............................................................................1-1 1.2 SRT 1F Equipment Details .....................................................................1-6 1.2.1 Ordering Guide .......................................................................................1-6 1.2.2 BRU (Branching Network Unit) ...............................................................1-8 1.2.3 MSTU (Main Signal Transmission Unit) ..................................................1-8 1.2.4 SCSU (Supervisory, Control and Switching Unit) ....................................1-8 1.2.5 BBIU (Baseband Interface Unit)..............................................................1-9 1.2.6 General Specifications ..........................................................................1-10 1.2.7 General Information ..............................................................................1-10 1.2.8 Transmitter (TX) ...................................................................................1-11 1.2.9 Receiver (RX) .......................................................................................1-15 1.2.10 Modulator (MOD) ..................................................................................1-16 1.2.11 Demodulator (DEM) ..............................................................................1-16 1.2.12 Digital Processing .................................................................................1-17 1.2.13 Overall ..................................................................................................1-19 1.2.14 RF Interference.....................................................................................1-25 1.2.15 Countermeasures to Fading .................................................................1-26 1.2.16 Signal Interface for STM-1 System .......................................................1-27 1.2.16.1 Base Band Signal Interface ..................................................................1-27 1.2.16.2 Base Band for Optical STM-1 Interface ................................................1-27 1.2.16.3 Base Band for Electrical STM-1 Interface .............................................1-28 1.2.16.4 Jitter......................................................................................................1-28 1.2.16.5 Alarm Indication Signal (AIS) ................................................................1-28 1.2.16.6 BSI........................................................................................................1-29 1.2.17 Auxiliary Signal Interface ......................................................................1-29 1.2.17.1 Radio User Channel (RUC)...................................................................1-29 1.2.17.2 Way Side (WS).....................................................................................1-29 1.2.17.3 Order Wire (OW) ..................................................................................1-30 1.2.17.4 User Channel (UC) ...............................................................................1-30 1.3 Mechanical Specification.......................................................................1-31 1.3.1 General.................................................................................................1-31 1.3.2 Rack construction .................................................................................1-32 1.3.3 Inter-Rack Connections ........................................................................1-32 1.3.4 Rack Layout..........................................................................................1-33

Table of Contents UMN

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1.3.5 Unit Layout............................................................................................1-35 1.4 Environmental Specification..................................................................1-37 1.5 Power Requirements ............................................................................1-38 1.5.1 General.................................................................................................1-38 1.5.2 Unit Power Consumption ......................................................................1-38 1.6 Frequency Plan and Antenna System...................................................1-39 1.6.1 General Information ..............................................................................1-39 1.6.2 Frequency Plan.....................................................................................1-39 1.6.2.1 U4 GHz Band Frequency Allocation (ITU-R F.382-6)............................1-43 1.6.2.2 4 GHz Band Frequency Allocation (ITU-R F. 635-3) .............................1-44 1.6.2.3 5 GHz Band Frequency Allocation (ITU-R F.1099 Annex-1) .................1-45 1.6.2.4 L6 GHz Band Frequency Allocation (ITU-R F. 383-5) ...........................1-46 1.6.2.5 U6 GHz Band Frequency Allocation (ITU-R F. 384-5)...........................1-47 1.6.2.6 L7 GHz Band Frequency Allocation (ITU-R F. 385-6) ...........................1-48 1.6.2.7 U7 GHz Band Frequency Allocation (ITU-R F. 385-6)...........................1-49 1.6.2.8 L8 GHz Band Frequency Allocation (ITU-R F. 386-4) ...........................1-50 1.6.2.9 11 GHz Band Frequency Allocation (ITU-R F. 387-6) ...........................1-51 1.6.3 13 GHz Band Frequency Allocation (ITU-R F.497-4) ............................1-53 1.6.4 RF Branching Network..........................................................................1-54

2 EQUIPMENT DESCRIPTION....................................................................................2-1 2.1 Equipment Configurations and Features.................................................2-1 2.1.1 SRT 1F System ......................................................................................2-1 2.1.2 Terminal..................................................................................................2-1 2.1.3 Baseband Interface.................................................................................2-4 2.1.4 Alternated and Co-channel Operation.....................................................2-4 2.2 STM-1 Signal Transmission ....................................................................2-8 2.2.1 STM-1 Electrical Signal Interface............................................................2-8 2.2.2 Main Signal Flow (MSTU Function).........................................................2-8 2.2.3 Space Diversity.....................................................................................2-12 2.2.4 MSTU Front Panel ................................................................................2-13 2.2.4.1 Top View of MSTU Adapter ..................................................................2-15 2.2.5 Engineering Orderwire (OW) ................................................................2-16 2.2.6 User Channel (UC) ...............................................................................2-17 2.2.7 Radio User Channel (RUC)...................................................................2-18 2.2.8 Wayside Traffic (WS)............................................................................2-19 2.2.9 Digital Communication Channel (DCC).................................................2-20 2.3 OverHead Bit Access for SRT 1F System.............................................2-21


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2.3.1 MSOH and RSOH.................................................................................2-22 2.3.2 RFCOH.................................................................................................2-24 2.4 Radio Protection Switch System ...........................................................2-28 2.4.1 Outline of Radio Protection Switching ...................................................2-28 2.4.2 USW and BSW .....................................................................................2-30 2.4.3 Switching Priority ..................................................................................2-32 2.4.4 Switching Initiator and Operation Time .................................................2-33 2.4.5 Occasional Traffic (option) ....................................................................2-34 2.5 Supervisory, Control & Switching Unit (SCSU)......................................2-35 2.5.1 Signal Interface.....................................................................................2-37 2.5.2 Bipolar Switch (BSW) unit.....................................................................2-37 2.5.3 Supervisory (SV) unit ............................................................................2-37 2.5.4 Timing Control Unit (TCU) ....................................................................2-42 2.5.5 Housekeeping (HK) unit........................................................................2-42 2.5.6 Embedded Communication Unit (ECU) (option)...................................2-43 2.5.7 Occasional Interface (OCC INTF) unit (option) ....................................2-43 2.5.8 Baseband Switch Interface (BSW INTF) unit (option) ..........................2-43 2.6 Baseband Interface Unit (BBIU)............................................................2-44 2.6.1 Optical Interface (OPT INTF) unit .........................................................2-44 2.6.2 MSP SW and BBC................................................................................2-48 2.7 Applications ..........................................................................................2-51 2.7.1 Co-Channel Operation ..........................................................................2-51 2.7.2 Synchronization ....................................................................................2-53 2.7.2.1 Synchronization Source ........................................................................2-53 2.7.2.2 Synchronization Mode...........................................................................2-54 2.7.2.3 Clock Mode...........................................................................................2-56 2.7.2.4 Quality Level (S1 byte)..........................................................................2-56 2.7.2.5 Line Clock Priority.................................................................................2-57 2.7.3 Orderwire Applications..........................................................................2-58 2.7.3.1 Orderwire Extension .............................................................................2-58 2.7.3.2 Digital-Through .....................................................................................2-58 2.7.3.3 Ring Protection .....................................................................................2-58

3 INSTALLATION........................................................................................................3-1 3.1 Installation preliminaries .........................................................................3-1 3.1.1 Storage, Unpacking and Inspection ........................................................3-1 3.1.1.1 Storage...................................................................................................3-1 3.1.1.2 Preparation .............................................................................................3-2


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3.1.1.3 Unpacking and Inspection.......................................................................3-2 3.1.1.4 General Unpacking Method ....................................................................3-2 3.1.2 Storage of Spare Units ...........................................................................3-2 3.1.3 Accessories ............................................................................................3-3 3.2 Optical Fiber Cables and Jumpers..........................................................3-3 3.2.1 Warning and General Handling...............................................................3-3 3.2.1.1 Tools Required .......................................................................................3-3 3.2.1.2 Warning Messages.................................................................................3-3 3.2.1.3 Storage...................................................................................................3-4 3.2.1.4 Handling .................................................................................................3-4 3.2.2 Connection and Disconnection of Optical Cables....................................3-6 3.2.2.1 Tools Required .......................................................................................3-6 3.2.2.2 Preparation .............................................................................................3-6 3.2.2.3 Connection Procedure ............................................................................3-6 3.2.2.4 Disconnection Procedure........................................................................3-6 3.2.3 Cleaning of Optical Cables and Connectors............................................3-6 3.2.3.1 Tools Required .......................................................................................3-6 3.2.3.2 Procedure ...............................................................................................3-7 3.2.4 Inspection of Optical Cables and Connectors .........................................3-7 3.2.4.1 Connector End-face Definitions ..............................................................3-7 3.2.4.2 End-face Zone Definitions.......................................................................3-7 3.2.4.3 Defect Definitions....................................................................................3-8 3.2.4.4 Scratch and Pit Defects ..........................................................................3-8 3.2.4.5 Chip Defects ...........................................................................................3-9 3.2.4.6 Crack Defects .......................................................................................3-10 3.2.4.7 Tools Required .....................................................................................3-11 3.2.4.8 Procedure .............................................................................................3-11 3.3 Rack Installation ...................................................................................3-11 3.3.1 Precautions...........................................................................................3-11 3.3.1.1 Suitable Places for Equipment Installation ............................................3-11 3.3.2 Safety Measures for Equipment Handling.............................................3-12 3.3.3 Tools Required .....................................................................................3-12 3.3.4 Preparation ...........................................................................................3-12 3.3.4.1 Bay Mounting........................................................................................3-13 3.3.4.2 Bay Securing ........................................................................................3-13 3.3.5 Rack Configuration ...............................................................................3-14 3.3.6 Shelf Configuration ...............................................................................3-16


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3.3.7 How to Install Shelves & Units ..............................................................3-18 3.3.7.1 Preparation of Shelves..........................................................................3-18 3.3.8 Mounting of Shelves .............................................................................3-20 3.3.8.1 Mounting of Slide-In Units.....................................................................3-22 3.4 Inter Shelf Connections.........................................................................3-26 3.4.1 SRT 1F Input ........................................................................................3-26 3.4.1.1 Warning Messages...............................................................................3-26 3.4.2 Waveguide Connection.........................................................................3-27 3.4.2.1 Tools Required .....................................................................................3-28 3.4.2.2 Preparation ...........................................................................................3-29 3.4.2.3 Precautions...........................................................................................3-29 3.4.3 Connection of Primary Power Lead.......................................................3-29 3.4.3.1 Tools Required .....................................................................................3-29 3.4.3.2 Procedure .............................................................................................3-32 3.4.3.3 Suitable Lead Terminal Treatment........................................................3-33 3.4.3.4 Precautions...........................................................................................3-33 3.4.4 AMP hand Crimping Tool ......................................................................3-34 3.4.4.1 CRIMPING PROCEDURES..................................................................3-36 3.4.4.2 Assembling of AMP Connector .............................................................3-37 3.4.4.3 Office Power Supply Check ..................................................................3-37 3.4.4.4 Tools Required .....................................................................................3-37 3.4.4.5 Procedure .............................................................................................3-37 3.4.5 Frame Grounding..................................................................................3-38 3.4.6 Waveguide Pressurization and Alarms .................................................3-39 3.4.7 Semi-Rigid Coaxial Connectors ............................................................3-39 3.4.8 Inter shelf Connection for RPS, SV, and DCC ......................................3-41 3.4.9 Baseband Signal Cable Connection......................................................3-42 3.4.9.1 STM-1 electrical signal Interface...........................................................3-42 3.4.9.2 STM-1 optical signal Interface...............................................................3-43 3.4.10 Wayside Signal Cable Connection........................................................3-45 3.4.11 Inter shelf connection for CO-channel operation...................................3-46 3.5 Connector and Connector Pin Assignment ...........................................3-48 3.5.1 Connectors Layout on Back Wired Board (BWB)..................................3-48 3.5.1.1 Connectors on the BWB of SCSU ........................................................3-50 3.5.1.2 Connectors on the BWB of BBIU ..........................................................3-51 3.5.2 Connector PIN assignment for OSSI ....................................................3-52 3.5.3 Connector PIN assignment for Housekeeping port 1 ............................3-53


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3.5.4 Connector PIN assignment for Housekeeping port 2 ............................3-54 3.5.5 Connector PIN assignment for Housekeeping port 3 ............................3-55 3.5.6 Connector PIN assignment for Housekeeping port 4 ............................3-56 3.5.7 Connector PIN assignment for Housekeeping port 5 ............................3-57 3.5.8 Connector PIN assignment for Radio User Channel .............................3-58 3.5.9 Connector PIN assignment for Rack Alarm BUS ..................................3-59 3.5.10 Connector PIN assignment for EOW ....................................................3-60 3.5.11 Connector PIN assignment for WS/UC.................................................3-61 3.5.12 Connector PIN assignment for User Channel .......................................3-62 3.5.13 Coaxial Connector assignment for External Clock ................................3-63

4 ACCEPTANCE AND TURN-UP ................................................................................4-1 4.1 ACCEPTANCE OF THE SRT 1F ............................................................4-1 4.1.1 Perform Overall Visual Inspection...........................................................4-1 4.1.2 Check Incoming Power Supply at SRT 1F Rack .....................................4-2 4.1.2.1 Test Equipment Required .......................................................................4-2 4.1.2.2 Procedure ...............................................................................................4-2 4.2 Installation of the SRT 1F Slide-in Units..................................................4-3 4.2.1 Warning Messages.................................................................................4-3 4.2.1.1 Laser Warning ........................................................................................4-3 4.2.1.2 Electrostatic Discharge Warning.............................................................4-3 4.2.2 Slide-In Installation Procedures ..............................................................4-5 4.2.3 Insertion and Removal of Slide-in Units ..................................................4-5 4.2.3.1 Inserting a Slide-In Unit...........................................................................4-6 4.2.3.2 Removing a Slide-In Unit ........................................................................4-7 4.2.3.3 Removing an Optical Unit .......................................................................4-8 4.2.4 Installing the MSTU Unit .........................................................................4-9 4.2.5 Installing SCSU Unit ...............................................................................4-9 4.2.6 Installing BBIU Unit ................................................................................4-9 4.2.7 Installing the Optical Interface (OPT INTF) Unit......................................4-9 4.2.7.1 Procedure ...............................................................................................4-9 4.3 SRT 1F Acceptance and Turn-Up Tests ...............................................4-10 4.3.1 Warning Messages...............................................................................4-10 4.3.1.1 Laser Warning ......................................................................................4-10 4.3.1.2 Inserting Plugin Units ..........................................................................4-10 4.3.1.3 Electrostatic Discharge Warning...........................................................4-11 4.3.2 SRT 1F In-Station, Inter-Station and End to End Tests.........................4-12 4.3.3 Test Equipment Required .....................................................................4-13


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4.4 Waveguide and Antenna Alignment Tests ............................................4-14 4.4.1 Waveguide Sweeping ...........................................................................4-14 4.4.1.1 Procedure for Return Loss Measurement .............................................4-14 4.4.2 Antenna Alignment ...............................................................................4-16 4.4.2.1 AGC Current Monitoring .......................................................................4-16 4.4.2.2 Antenna XPIC Optimization ..................................................................4-17 4.4.3 Waveguide Pressurization and Alarms .................................................4-17 4.5 SRT 1F In-Station Performance Tests ..................................................4-18 4.5.1 Hardware Settings ................................................................................4-18 4.5.1.1 Default Values ......................................................................................4-18 4.5.2 Provisioning (Software Settings) ...........................................................4-18 4.5.2.1 Default Values ......................................................................................4-18 4.5.3 Transmit (TX) Local OSC Frequency....................................................4-19 4.5.3.1 Equipment Required .............................................................................4-19 4.5.3.2 Specification .........................................................................................4-19 4.5.3.3 Test Procedure .....................................................................................4-20 4.5.4 Transmit Output Power Level................................................................4-21 4.5.4.1 Equipment Required .............................................................................4-21 4.5.4.2 Specification .........................................................................................4-21 4.5.4.3 Test Procedure .....................................................................................4-21 4.5.5 Transmit Spectrum ...............................................................................4-23 4.5.5.1 Equipment Required .............................................................................4-23 4.5.5.2 Specification .........................................................................................4-23 4.5.5.3 Test Procedure .....................................................................................4-24 4.5.6 Receiver (RX) AGC Range ...................................................................4-25 4.5.6.1 Equipment Required .............................................................................4-25 4.5.6.2 Test Procedure .....................................................................................4-25 4.5.7 Optical Output Power Level ..................................................................4-27 4.5.7.1 Equipment Required .............................................................................4-27 4.5.7.2 Specification .........................................................................................4-27 4.5.7.3 Test Procedure .....................................................................................4-27 4.5.8 Minimum and Maximum Optical Receive Level .....................................4-29 4.5.8.1 Test Procedure .....................................................................................4-29 4.5.9 External Clock Supply...........................................................................4-31 4.5.9.1 Warning Messages...............................................................................4-31 4.5.9.2 Test Procedure .....................................................................................4-31 4.5.10 Rack Alarm Test ...................................................................................4-33


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4.5.10.1 Equipment Required .............................................................................4-33 4.5.10.2 Test procedure......................................................................................4-33 4.6 SRT 1F Inter-Station Tests ...................................................................4-35 4.6.1 Receive (RX) Signal Level ....................................................................4-35 4.6.1.1 Equipment Required .............................................................................4-35 4.6.1.2 Test Procedure .....................................................................................4-35 4.6.2 IF FREQUENCY RESPONSE...............................................................4-36 4.6.3 SPACE DIVERSITY EQUALIZATION...................................................4-40 4.6.4 ATPC Test (End to End LAB Test)........................................................4-45 4.6.4.1 Equipment Required .............................................................................4-45 4.6.4.2 Test Procedure .....................................................................................4-45 4.7 SRT 1F End to End Station Performance Tests....................................4-47 4.7.1 Remote NE Management via DCC .......................................................4-47 4.7.1.1 DCC configuration ................................................................................4-47 4.7.1.2 Test ......................................................................................................4-49 4.7.2 Radio Protection Switch (RPS) Test .....................................................4-51 4.7.2.1 Equipment Required .............................................................................4-51 4.7.2.2 Test Procedure .....................................................................................4-51 4.7.3 Way Side Test ......................................................................................4-53 4.7.3.1 Equipment Required .............................................................................4-53 4.7.3.2 Way Side Transmission Test ................................................................4-53 4.7.4 BER Characteristics Test (Lab Test).....................................................4-55 4.7.4.1 Equipment Required .............................................................................4-55 4.7.4.2 Specification .........................................................................................4-55 4.7.5 BACKGROUND BER TEST..................................................................4-58 4.7.6 Synchronization ....................................................................................4-60 4.7.6.1 Clock Sources selection........................................................................4-60 4.7.6.2 Test ......................................................................................................4-62 4.7.7 MSP Switching Test..............................................................................4-63 4.7.7.1 Test Procedure .....................................................................................4-63 4.8 Appendix...............................................................................................4-65 4.8.1 MSTU Setting .......................................................................................4-65 4.8.1.1 MSTU Front Panel ................................................................................4-66 4.8.1.2 DADE setting for SD .............................................................................4-69 4.8.2 Hardware Setting ..................................................................................4-71 4.8.2.1 SV unit ..................................................................................................4-72 4.8.2.2 TCU unit ...............................................................................................4-73


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4.8.2.3 BSW unit ..............................................................................................4-74 4.8.2.4 OCC INTF unit ......................................................................................4-75 4.8.2.5 PE INTF unit .........................................................................................4-76 4.8.3 Provisioning through LCT .....................................................................4-77

5 OPERATION & MAINTENANCE ..............................................................................5-1 5.1 LED Indications.......................................................................................5-1 5.2 LCT.........................................................................................................5-5 5.2.1 Start-up LCT Operation...........................................................................5-6 5.2.2 Alarm (Condition) Type and Description ...............................................5-11 5.2.3 Performance Monitor ............................................................................5-18 5.2.4 Analog Monitor......................................................................................5-21 5.2.5 Radio Section Physical Interface (RSPI) ...............................................5-23 5.3 Radio Protection Switch........................................................................5-24 5.3.1 Automatic Switching and Status Indication............................................5-26 5.3.2 Manual Control .....................................................................................5-26 5.3.3 SW PM Data.........................................................................................5-27 5.3.4 Auto Refresh.........................................................................................5-27 5.3.5 Notice for RPS Operation .....................................................................5-28 5.3.5.1 Power off of SCSU................................................................................5-28 5.3.5.2 Lockout .................................................................................................5-28 5.3.5.3 Power off of MSTU ...............................................................................5-28 5.4 Maintenance Control of Other Functions...............................................5-29 5.4.1 Loop Back.............................................................................................5-29 5.4.2 Protection Switch Operation (MSP).......................................................5-31 5.4.2.1 Multiplex Section Protection..................................................................5-31 5.4.2.2 TCU unit Protection ..............................................................................5-31 5.4.2.3 Synch Switch ........................................................................................5-31 5.4.3 ALS Release.........................................................................................5-32 5.5 Unit Replacement .................................................................................5-33 5.5.1 Fan Replacement .................................................................................5-33 5.5.2 MSTU and Other Units..........................................................................5-35 5.5.3 SV unit Replacement ............................................................................5-36 5.5.4 Returning Replaced Unit .......................................................................5-39 5.6 APPENDIX............................................................................................5-41 5.6.1 LCT Command Tree and Functions......................................................5-41

A APPENDIX...................................................................................................................1 A.1 Abbreviation of SRT 1F Terms...................................................................1


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UMN 1. GENERAL DESCRIPTION

SRT 1F 911-362/02C0000 Issue 1, July 2002 1-1

1 GENERAL DESCRIPTION

1.1 General description

1.1.1 Introduction to the SRT 1F Radio Equipment

The SRT 1F series radio equipment is a high capacity (155 Mbit/s STM-1) system designed for trunk line transmission applications. The SRT 1F series operate in the 4/5/U6/11 GHz radio frequency bands with 40 MHz frequency spacing, and in the U4/L6/7/L8/13 GHz radio frequency bands with 28.00, 29.00 and 29.65 MHz frequency spacing. The equipment is fully solid state and is designed to meet ITU-T and ITU-R Recommendations for long haul and high capacity digital microwave radio systems. The modulation scheme used is 64/128 QAM Multi-Level Coded Modulation (MLCM) with forward error correction. The SRT 1F can be used in various types of SDH networks such as ring, media diversity or linear configurations, and over various communication routes , i.e., waterways, mountains, inter or intra-city routes. The SRT 1F accepts one synchronous 155 Mb/s (STM-1) signal per RF frequency for alternated operation, or two synchronous 155 Mb/s (STM-1) signals per RF frequency for co-channel operation. The protection scheme is N+1 for alternated operation and (N+1)2 for co-channel operation. Various optional functions are provided, such as 2 Mb/s wayside traffic (carried by RFCOH and SOH respectively) and digital service channels (carried by RFCOH). Each RF channel can carry two wayside signals plus two digital service channels, and all protected by the N+1 Radio Protection System (RPS).

1.1.2 Equipment Features

The main features of the SRT 1F series radio equipment are;

Completely solid-state

Fully SDH (Synchronous Digital Hierarchy) compatible digital radio.

Interconnectabilityy with other manufacturers SDH transmission equipment available. (Further study might be necessary for undefined overhead bytes,etc.)

SDH STM-1 optical interface available as an option.

1+1 protected STM-1 optical interface for Multiplex Section Protection (MSP).

Section overhead (SOH) bits insertion/extraction at both terminal and repeater stations, the same as for SDH optical fiber transmission systems.

High power amplifier using GaAs Field Effect Transistor (GaAs FET)

1. GENERAL DESCRIPTION UMN

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Low power consumption of the RF High Power Amplifier using IF pre-distortion linearity compensation.

Automatic Transmit Power Control (ATPC) is available as standard configuration.

Low noise amplifier using High Electron Mobility Transistor (HEMT) with a noise figure of 1.5 dB (typical) for 4-6 GHz band.

High spectral efficiency of 8.5 bits/sec/Hz using 64 QAM Multi-Level Coded Modulation (64 QAM MLCM) and 11.4 bits/sec/Hz using 128 QAM Multi-Level Coded Modulation (128 QAM MLCM) for co-channel operation.

High efficiency error correction using Multi-Level Coded Modulation (MLCM).

Super high density packaging: Eight (8) complete SDH radio system including Synchronous Equipment Management Function (SEMF) are mounted in one ETSI rack (2200600300 mm).

Space diversity reception is available as a standard function (by software-based). In-Phase (IP) combiner is used.

Adaptive demodulator with fully digital linear transversal equalizer (TVE) with decision feedback equalizer (DFE).

Errorless protection switching with early warning detection on fading.

Radio user channel (RUC) for a maximum of 2 channels using RFCOH. Signal interfaces are available for both VF and 64 kb/s signal. 64 kb/s signal interface complies with ITU-T recommendation G.703 for co-directional or contra-directional interface.

One user channel using F1 byte of SOH per STM-1 is also available.

Two 2 Mb/s wayside traffic channels using SOH and RFCOH are available.

Event management facility: Alarms and status of the equipment is reported by the SEMF (Synchronous Equipment Management Function) using the Data Communication Channel (DCC)


SRT 1F 911-362/02C0000 Issue 1, July 2002 1-3

Performance management facility: Traffic performance of each hop and of each end-to-end can be monitored on each RF channel. Monitoring items are BBE (Background Block Error), BBER (Background Block Error Ratio), ES(Errored Seconds), ESR(Errored Second Ratio), SES (Severely Error Seconds), SESR (Severely Error Second Ratio), UAS (UnAvailable Seconds) and OFS (Out of Frame Second), number of pointer change and number of MSP and RPS switching.

Configuration management facility: NE configuration is retrieved by the network management terminal and items such as NE ID, and alarm thresholds can be set as provisioning.

Resource management facility: Physical inventory such as unit name, can be read by the SEMF.

Security management: Several maintenance levels are provided to avoid malfunction.

LCT is the local terminal for network element (NE) windows NT based.

Software download (SWDL) facility: Firmware used for SRT 1F operation can be remotely downloaded from the network management terminal.

Repeater hardware configuration: Repeater stations and terminals have the same configuration.


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SDH Radio1+N

MS Mode

SDH Radio1+N

MS Mode

SDH MUXADM

SDH MUXLTE

SDH MUXLTE

TributaryTributaryTributary

MSMSMSMS Note: MS : Multiplex Section LTE : Line Terminal Equipment RS : Regenerator Section ADM : Add Drop Multiplexer

Network feature : Multiplex Section Protection (MSP) with Section Adaption (SA).

Figure 1.1 - Linear Configuration

SDH MUX

ADM

SDH MUX

LTE

SDH MUX

LTE

SDH Radio

1+N or 0+1

MS Mode

SDH Radio

1+N or 0+1

MS Mode Tributary Tributary Tributary

MS MSMS MS Network feature : Network protection switching with media diversity

Figure 1.2 - Media Diversity Configuration


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MS

MS

MS

MSMS

SDH Radio1+N or 0+1MS Mode

SDH Radio1+N or 0+1MS Mode

SDH MUXADM

Tributary

SDH MUXADM

Tributary

SDH MUX ADM

Tributary

Network feature : Network protection switching with ring operation

Figure 1.3 - Standard Ring Configuration


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1.2 SRT 1F Equipment Details

1.2.1 Ordering Guide

Assembling an SRT 1F rack means having to select the proper equipment from the ordering guide. Please contact Siemenss Sales and Marketing dept. for the current ordering guide. Figure 1.4 shows the configuration of an (N+1) SRT 1F terminal equipment.

Figure 1.4 - (N+1, N = max. 7) SRT 1F Terminal Radio Equipment, Alternated operation

BBIU : Base-Band Interface Unit Subrack, optional for Optical Interface

MSP SW

OPT INTF

BBC : Base-Band Control Unit x 1

: Multiplex Section Protection SW Unit for OPT INTF x (Main CHs)

: Optical Interface Unit x (Main CHs) For usage of MSP x (2 Main CHs)

SCSU

MSTU

BRU

SRT 1F Terminal Equipment Rack

: Supervisory, Control, & Switching Unit Subrack x 1

: ETSI Rack x 1

: RF Branching Network Unit Shelf x 1 RF Branching Network Circuit x (Main CHs + Prot)

: Main Signal Transmission Unit x (Main CHs + Prot)

BSW

TCU

HK

OCC INTF

ECU

SV : Supervisory Unit x 1 : Supervisory Unit x 1

: Base-Band Switch Unit x (Main CHs)

: Timing Control Unit x 1 ( + 1 as option)

: Housekeeping Unit (option) x 2 max.

: Occasional traffic Interface Unit (option) x 1

: Embedded Communication Unit (option) x 2 max.


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Figure 1.5 shows the configuration of an SRT 1F terminal radio equipment operating in the 2(N+1) co-channel operation mode. One rack is used for vertical polarization, another for horizontal polarization.

Figure 1.5 - 2 x (N+1, N = max. 7) SRT 1F Terminal Radio Equipment, Co-channel operation

BBIU : Base-Band Interface Unit (option) x 2

BBC : Base-Band Control Unit x 2

MSP SW : Multiplex Section Protection SW Unit for OPT INTF x (Main CHs)

OPT INTF : Optical Interface Unit x (Main CHs) For usage of MSP x (2 Main CHs)

SCSU

MSTU

BRU

SRT 1F Terminal Equipment Rack

: Supervisory, Control, & Switching Unit x 2

: ETSI Rack x 2

: RF Branching Network Unit Shelf x 2 RF Branching Network Circuit x (Main CHs + Prot) x 2

: Main Signal Transmission Unit x (Main CHs + Prot) x 2

BSW

SV : Supervisory Unit x 1 : Supervisory Unit x 1

: Base-Band Switch Unit x (Main CHs)

TCU : Timing Control Unit x 1 ( + 1 as option)

HK : Housekeeping Unit x 2 max.

OCC INTF

: Occasional traffic Interface Unit(option) x 2 max.

ECU : Embedded Communication Unit(option) x 2 max.

BSW INTF : BSW Interface x 1 for RPS Group 2


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1.2.2 BRU (Branching Network Unit)

To define the BRU, the following requirements must be detailed: i) Operating frequency band ii) Assigned RF channel number and frequency iii) System configuration (1+0, 1+1, 2+1,........., 7+1) iv) Operating mode: alternated operation or co-channel operation v) With SD (Space Diversity) or without SD

1.2.3 MSTU (Main Signal Transmission Unit)

To define the MSTU, the following requirements must be detailed: i) Operating frequency band ii) Assigned RF channel number and frequency iii) Operating mode: alternated operation or co-channel operation Note: SD receiver circuit is equipped as a standard circuit on the SRT 1F receiver.

1.2.4 SCSU (Supervisory, Control and Switching Unit)

To define the SCSU, the following requirements must be detailed: i) RPS system configuration: Number of operating RF channels ii) Operating mode: alternated operation or co-channel operation iii) Required optional unit name, such as ECU, HK, TCU, OCC

INTF, and its quantity. iv) Sub-module of SV unit for RUC (VF, Digital interface or none)


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1.2.5 BBIU (Baseband Interface Unit)

To define the BBIU, the following requirements must be detailed: i) RPS system configuration: Number of operating RF channels ii) Operating mode: alternated operation or co-channel operation iii) Requirement for MSP function.


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1.2.6 General Specifications

1.2.7 General Information

Table 1.1 - General Specifications

Description Modulation 64 state Quadrature Amplitude Modulation with Multi Level Coded

Modulation type FEC (64 QAM MLCM) for 4/5/U6/11 GHz band

128 state Quadrature Amplitude Modulation with Multi Level Coded Modulation type FEC (128 QAM MLCM) for U4/L6/7/L8/13 GHz band

Capacity Alternated operation One (1) STM-1 (155.52 Mbit/s) signal per RF frequency

Co-channel operation Two (2) STM-1 (155.52 Mbit/s) signal per RF frequency

Auxiliary signal Wayside traffic (2.048 Mb/s) Maximum 2 channels per STM-1 by using RFCOH and SOH. Maximum 2N channels for N+1 alternated operation or Maximum 2 x 2N channels for 2 x (N+1) co-channel operation

Radio User Channel (64 kb/s) Maximum 2 channels per system using RFCOH for N+1 Maximum 2 channels for N+1 alternated operation or Maximum 2 x 2 channels for 2 x (N+1) co-channel operation

User Channel (SOH, 64 kb/s) One (1) channel per STM-1 using SOH Maximum N channels for N+1 alternated operation or Maximum 2N channels for 2 x (N+1) co-channel operation

Repeating Method Regenerative

Overhead Byte Access

Same insertion/extraction method as for SDH fibre optic transmission system for terminal and repeater station

RS Section (Note-1)

A1, A2, C1, B1, E1, F1, D1D3 byte

MS Section (Note-2) B2, K1, K2, D4D12 and E2, M1 and S1 byte.

Hypothetical Reference Digital Path (HRDP)

In accordance with the latest ITU-R recommendation


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1.2.8 Transmitter (TX)

Table 1.2 - Transmitter section

Description Output power +32/29 dBm1 dB for 4-L8GHz band

+29 dBm1 dB for 11GHz band +27 dBm1 dB for 13GHz band measured at MSTU unit output

Linearity compensation

Linearizer circuit is employed to maintain optimum linearity

Local carrier RF band oscillation With PLL Synthesizer type, frequency pre-settable Coverage of upper or lower half of the corresponding band (quarter band for 11 and 13GHz).

Local Frequency stability

Within 10 ppm

Spurious emission For unmodulated carrier measured at duplexer output < 60 dBm in the frequency range 30.0 MHz to 21.2 GHz < 30 dBm in the frequency range 21.2 GHz to 40.0 GHz

IF 1st IF: 70 MHz 2nd IF: 844 MHz

IF input (Test In)

Signal level: 10 dBm nominal Variation: 1 dB

Impedance: 75 ohm unbalanced

Return loss: > 20 dB/ 70 MHz 13 MHz for 64 QAM > 20 dB/ 70 MHz 11 MHz for 128 QAM

RF filter Chebycheff type

3 dB bandwidth: 40 MHz for 64 QAM 30 MHz for 128 QAM

ATPC

Automatic transmit power control (ATPC) is standard. Power control level: 10 dB Response time: 100 ms Control initiation: Received signal threshold detection

Transmitted output spectrum

64 MLCM: Figure 1.6 128 MLCM: Figure 1.7 128 MLCM: Figure 1.8


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Figure 1.6 Transmitter output spectrum

(64QAM system, 40 MHz spacing)

(Exclude emissions which result from the modulation process)

RF frequency (MHz)

39.5MHz-65dB

24MHz-35dB

14MHz+1dB

19.5MHz-10dB

-90

-100

-80

-70

-60

-50

0 5 10 15 20 25 30 35 40 45 50 55 100

-40

-30

-20

-10

0 +1

55MHz-95dB


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RF frequency (MHz)

50-110

34MHz-65dB

22MHz-45dB

18MHz-32dB

17MHz-32dB

12MHz+2dB

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

1510 20 30 35 40 45 50 55 60 65

14.5MHz-6dB

32MHz-85dB

40MHz-95dB

70

60MHz-105dB

+2


(128QAM system, 29 / 29.65 MHz spacing)



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(128QAM system, 28 MHz spacing)


RF frequency (MHz)

5 0

29.5MHz-65dB

21MHz-35dB

20MHz -35dB

13MHz+1dB

-80

-70

-60

-50

-40

-30

-20

-10

0

15 10 20 25 30 35 40 45 50 55 60 65 70

+1


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1.2.9 Receiver (RX)

Table 1.3 - Receiver section

Description Noise figure (Note 1)

1.5 dB typical (for 4 ~ 6 GHz band) 2.0 dB guaranteed (for 4 ~ 6 GHz band 2.0 dB typical (for 7 ~ 8 GHz band) 2.5 dB guaranteed (for 7 ~ 8 GHz band) 2.5 dB typical (for 11 GHz band) 3.0 dB guaranteed (for 11 GHz band) 4.0 dB typical (for 13 GHz band) 4.5 dB guaranteed (for 13 GHz band)

Note 1: Noise figure is measured at the MSTU unit input on both the main and SD receiver, independently, and at maximum IF amplifier gain.

Local carrier RF band oscillation with PLL Synthesizer type, frequency pre-settable Half band coverage on lower or upper half of the corresponding band (quarter band for 11 and 13 GHz band).

Spurious emission For unmodulated carrier measured at duplexer output < 60 dBm in the frequency range 30.0 MHz to 21.2 GHz < 30 dBm in the frequency range 21.2 GHz to 40.0 GHz

Local Frequency stability Within 10 ppm (11 GHz)

Image rejection More than 100 dB with RX BPF measured at the MSTU output when the image and main signal levels are equal, and with unmodulated carrier.

Normal received power 32 to 55 dBm

Received input range

(for BER at 1 x 10 3)

Maximum level: 17 dBm

Minimum level: 74.5 dBm for 64QAM 72.0 dBm for 128QAM

AGC dynamic range 17 to 77 dBm measured at MSTU input

IF 1st IF: 70MHz 2nd IF: 844MHz

IF output (70 MHz) (Test Out)

Signal level: 10 dBm nominal, +l dB/2 dB variation for 17 to 77 dBm modulated RX input

Impedance : 75 ohm unbalanced

Return loss : > 20 dB/ 70 MHz 13 MHz for 64 QAM 11 MHz for 128 QAM

Measured at the MSTU unit monitoring point.

RF filter Chebycheff type

3 dB bandwidth: 40 MHz for 64 QAM 30 MHz for 128 QAM

IF filter Butterworth type 3 dB bandwidth 40 MHz


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1.2.10 Modulator (MOD)

Table 1.4 - Modulation Description

Modulation For 40 MHz Channel spacing: 64-state Quadrature Amplitude Modulation with Multi-Level Coded Modulation type FEC (64 QAM MLCM) For 28/29/29.65/30 MHz Channel spacing: 128-state Quadrature Amplitude Modulation with Multi-Level Coded Modulation type FEC (128 QAM MLCM)

Spectrum shaping 35 % raised cosine roll-off factor for 64 QAM MLCM or 25 % raised cosine roll-off factor for 128 QAM MLCM Spectrum shaping is root Nyquist distribution.

Local carrier Crystal oscillator (XO) Local frequency stability

Within 15 ppm

IF 70 MHz

1.2.11 Demodulator (DEM)

Table 1.5 - Demodulation Description

Demodulation Coherent detection/instantaneous decision Spectrum shaping 35 % raised cosine roll-off factor for 64 QAM MLCM

or 25 % raised cosine roll-off factor for 128 QAM MLCM Spectrum shaping is root Nyquist distribution.

IF 70 MHz Adaptive equalizer in baseband

10-tap linear transversal equalizer (TVE) and 10-tap decision feedback equalizer (DFE)

Adaptive equalizer in IF

Slope equalizer


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1.2.12 Digital Processing

Table 1.6 - Digital Processing

Description SDH Electrical interface

CMI-to-unipolar conversion

Unipolar-to-CMI conversion

Frame synchronization to STM-1 frame

Section Adaptation (change the pointer)

Scrambler/descrambler

Addition/drop of section Overhead bit (1) Framing bit (A1, A2) (2) Regenerator section party (B1) (3) Network management for regenerator section (D1 to D3) (4) Regenerator section orderwire (E1) (5) User channel (F1) (6) Multiplex section Parity (B2) (7) Network management for multiplex section (D4 to D12) (8) Multiplex section orderwire (E2) (9) AIS, FERF (K1, K2) (10) Section trace (J0) (11) Far End Block Error (M1) (12) Synchronization status byte (S1)

SDH optical interface Optical-to-electrical conversion

Electrical-to-optical conversion

Frame synchronization to STM-1 frame

Section Adaptation (change the pointer)

Scrambler/descrambler

Addition/drop of section Overhead byte (1) Framing bit (A1, A2) (2) Regenerator section parity (B1) (3) Network management for regenerator section (D1 to D3) (4) Regenerator section orderwire (E1) (5) User channel (F1) (6) Multiplex section Parity (B2) (7) Network management for multiplex section (D4 to D12) (8) Multiplex section orderwire (E2) (9) MSP CONT (K1, K2) (10) Section trace (J0) (11) Far End Block Error (M1) (12) Synchronization status byte (S1)

FERF = Far End Receive Failure MSP = Multiplex Section Protection


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Table 1.6 - Digital Processing (continued)

Description For Radio SDH frame to Radio frame conversion

Radio frame complementary Overhead (RFCOH) insertion and detection

(1) Route ID (2) Radio protection switch (RPS) initiator (3) Digital service channel (4) RPS control signal (5) Far end control signal (6) Way side traffic (7) ATPC Control signal

Scrambling 2151 patterns

Route ID 16 addresses pre-settable ATPC = Automatic Transmit Power Control


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1.2.13 Overall

Table 1.7 Overall

Description Up-fade BER BER = 103 at RSL of 17 dBm measured at MSTU input

Down-fade BER For 64 QAM MLCM (Figure 1.9): BER = 103 at RSL of 76.5 dBm typical BER = 103 at RSL of 74.5 dBm guaranteed

BER = 106 at RSL of 73.5 dBm typical BER = 106 at RSL of 70.5 dBm guaranteed

Measured at MSTU input

For 128 QAM MLCM (Figure 1.10): BER = 103 at RSL of 74.0 dBm typical BER = 103 at RSL of 72.0 dBm guaranteed

BER = 106 at RSL of 71.0 dBm typical BER = 106 at RSL of 68.0 dBm guaranteed

Measured at MSTU input

Note 1 : Space Diversity improves RSL by 2 dB. Note 2 : RSL is 1.0 dB higher for 11 GHz and 2.5 dB higher for 13 GHz. Note 3 : Down-fade BER at point B is as follows. 64QAM Figure 1.11 128QAM CC Figure 1.12 128QAM AP (7/13GHz) Figure 1.13

Residual BER BER < Typical:1013 /hop/day at normal receiving condition Guaranteed:1012 /hop/day at normal receiving condition

RSL = Receive Signal Level


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Receive Signal Level (RSL) at point A (MSTU input)

Figure 1.9 BER vs RSL (64 QAM system)

(Down-fade)

10-3

BER

10-6

-70-727476 -78 -68 [dBm]

BER=10-3 at RSL=-74.5 dBm (Guaranteed)

BER=10-6 at RSL=-70.5 dBm (Guaranteed)

-76.5 dBm

-73.5 dBm

Typical curve


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Receive Signal Level (RSL) at point A (MSTU input)


(Down-fade)

BER=10-6 at RSL=-68 dBm (Guaranteed)

10-3

BER

10-6

-68-70-72 -74 -76 -66 [dBm]

BER=10-3 at RSL=-72 dBm (Guaranteed)

Typical curve

-71.0 dBm

-74.0 dBm


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Receive Signal Level (RSL) at point B


(Down-fade)

10 11 12 13 14 15 16 17 18 19 20

10 -2

-80 -70 -60RSL (dBm)

10 -6

10 -7

10 -9

10 -11

10 -10

10 -8

10 -4

10 -3

10 -5

RSL - BER Mask at point B(64QAM CC)

ETSI

U6G

at A

ETSI 11G

11G

4G

5G


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(Down-fade)

10 11 12 13 14 15 16 17 18 19 20

10 -2

-80 -70 -60RSL (dBm)

10 -6

10 -7

10 -9

10 -11

10 -10

10 -8

10 -4

10 -3

10 -5

RSL - BER Mask at point B(128QAM CC)

L6G

at A

L8G

ETSI

U4G


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(Down-fade)

10 11 12 13 14 15 16 17 18 19 20

10 -2

-80 -70 -60RSL (dBm)

10 -6

10 -7

10 -9

10 -11

10 -10

10 -8

10 -4

10 -3

10 -5

RSL - BER Mask at point B(128QAM AP)

ETSI

at A

U7G

ETSI 13G

L7G

13G


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1.2.14 RF Interference

Table 1.8 - RF Interference

Description Co-channel BER = 103 at C/I = 22 dB for 64 QAM MLCM and 25 dB for 128

QAM MLCM measured at duplexer input and RSL of 50 dBm

Adjacent channel BER = 103 at C/I = 33 dB for 64 QAM MLCM and 30 dB for 128 QAM MLCM measured at duplexer input and RSL of 50 dBm

Innermost channel C/N degradation at BER = 103 : < 1 dB measured at duplexer input and Inter-Port Isolation (IPI) of 40 dB

XPIC Improvement factor using XPIC for co-channel operation = 18 dB measured at BER = 103 interference curve

The following is the RF waveguide interface to/from the antenna system;

Frequency band Flange (IEC standard)

4 GHz band UDR 40

5 GHz band UDR 48

L6 GHz band UDR 70

7 GHz UDR 70

U6 GHz band UDR 70

L8 GHz band UDR 84

11 GHz band UDR 100

13 GHz band UDR 120


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1.2.15 Countermeasures to Fading

Table 1.9 - Countermeasures to Fading

Description SD In Phase combiner in IF stage LO endless phase shifter

SD DADE Method Two types are available;

Compensation with RF feeder length (equivalent to 25 m), or Compensation with delay adjuster at IF (equivalent to 100 ns).

SD DADE is adjusted through the delay line on the MSTU unit.

Adaptive Equalizer Adaptive time domain equalizer in baseband 20 tap full digital type

(a) 10-tap transversal equalizer (TVE) (b) 10-tap decision feedback equalizer (DFE)

Adaptive frequency domain equalizer in IF

(a) Slope equalizer (SLP EQL)

XPIC Cross Polarization Interference Canceller (XPIC) is inside the Demodulator module (optionally configure for co-channel operation only)

FEC Multi-Level Coded Modulation(MLCM)

Coding gain for 64QAM MLCM: 2.0 dB at BER=103 3.5 dB at BER=106

Coding gain for 128QAM MLCM: 2.0 dB at BER=103 3.7 dB at BER=106

ATPC ATPC range: 10 dB Control speed: 100 dB/sec


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1.2.16 Signal Interface for STM-1 System

1.2.16.1 Base Band Signal Interface The Base Band Signal interface is in accordance with ITU-T G.957 and G.703 Recs.

1.2.16.2 Base Band for Optical STM-1 Interface

Table 1.10 - Base Band for Optical STM-1 Interface (OPT INTF unit)

Bit Rate SDH level 1 155.52 Mbit/s 20 ppm

Unit Name OPT INTF 1 OPT INTF 2

Application code (ITU-T G.957) (S-1.1) (L-1.1)

Typical hop 0-15 Km 15-40 Km

Operation wavelength range (nm) 1260-1360 1280-1335

Transmitter at reference point S: Source type * MLM MLM

Spectral characteristics: Maximum RMS width (nm) 7.7 4.0

Maximum 20 dB width (nm)

Minimum side mode suppression ratio (dB)

Mean launched power: Maximum(dBm) Minimum (dBm)

8 15

0 5

Mi Bit rate minimum extinction ratio (dB) 8.2 10

Optical path between S & R: Attenuation range (dB) Maximum dispersion (ps/nm)

012 96

1028 N/A

Optical path between S and R: Attenuation range 0-12 10-28

Maximum dispersion (ps/nm) 96 186

Minimum optical return loss of cable point at S, including and connectors (dB)

NA NA

Maximum discrete reflectance between S and R NA NA

Receiving at reference point R

Minimum sensitivity (dBm)

Minimum overload

Maximum optical path penalty (including chirp penalty and dispersion penalty (dB)

Maximum reflectance of receiver, measured at R (dB)

28

8

1

NA

34

10

1

NA

Connector Used SC type or FC type

* Note : MLM = Multi-Longitudinal Mode SLM = Single-Longitudinal Mode


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1.2.16.3 Base Band for Electrical STM-1 Interface

Table 1.11 - Base Band for Electrical STM-1 Interface (BSW unit)

Bit rate 155.52 Mbit/s 20 ppm

Code format Coded Mark Inversion (CMI)

Pulse mask In accordance with ITU-T Rec. G.703

Impedance 75-ohm nominal, unbalanced

Return loss > 15 dB / 8~240 MHz, measured at base band input port

Input cable length

The attenuation of the coaxial cable pair should be assumed to follow an approximately root f law and to have a maximum insertion loss of 12.7 dB at a frequency of 78 MHz.

Coaxial cable 2.5C-QEW or equivalent

Connector used

27CP coaxial connector is standard. Other connectors are available at customer's request.

1.2.16.4 Jitter

Jitter tolerance

The SRT 1F radio equipment tolerates the input jitter applied according to ITU-T Rec. G.958 with Type A specified on Table 2.

Jitter transfer

The SRT 1F radio equipment meets the jitter transfer specification given in ITU-T Rec. G.958 Figure 6.2 with the jitter transfer parameter specified for Type B in Table 1/G.958 when sinusoidal jitter up to the mask level in Figure 6.3/G.958 with the jitter tolerance parameter specified for Type A in Table 2/G.958 is applied at the STM-1 input.

1.2.16.5 Alarm Indication Signal (AIS)

Terminal

When the Base Band signal (optical/electrical) or radio signal from the optical equipment or radio equipment is lost, the SRT 1F generates a AU- AIS (MS mode) or a MS-AIS (RS mode) to the next equipment

When the AU-AIS is detected from Base Band or radio signal, the SRT 1F transfer the AU-AIS to the next equipment after SOH processing.

When MS-AIS is detected from Base Band or radio signal, the SRT 1F transfers MS-AIS to the next equipment after RSOH processing (in case of RS operation), and transfers AU-AIS to the next equipment after RSOH and MSOH processing (in case of MS operation).


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Repeater

When frame or signal loss is detected, the SRT 1F generates MS-AIS to the next equipment

1.2.16.6 BSI Transmission Transparent transmission (BSI transmission). The property of a binary transmission channel, telecommunication circuit or connection, that permits all sequences of binary signal elements to be conveyed over it at its specified bit rate, without change to the value of any signal elements.

1.2.17 Auxiliary Signal Interface

1.2.17.1 Radio User Channel (RUC)

Table 1.12 - Auxiliary Signal Interface (RUC)

Transmission - Bit insertion/separation to/from RFCOH bits

Bit rate 64 kbit/s x 2 (equivalent to 2 CH telephony) per system

Interface Combination of VF and 64 kbit/s available by mounting optional sub-PCB module on the SV units.

VF interface Input level : 16 dBr nominal (16 to-0.5 dBr, 0.5 step) Output level: +7 dBr nominal (8.5 to +7 dBr, 0.5 step)

Voice maximum level: 3 dBmo

No. of CH Maximum 2 CH

Amplitude response: In accordance with ITU-T G.712

Signal-to-distortion: In accordance with ITU-T G.712

Impedance 600- balanced

Digital interface Interface: Co-directional or contra-directional

Connector used Multi-pin connector

1.2.17.2 Way Side (WS)

Table 1.13 - Auxiliary Signal Interface (WS)

Capacity 2048 kbit/s x 2 per STM-1

Transmission Bit insertion/separation to/from RFCOH and/or SOH bits

One wayside traffic is transferred through RFCOH bits, the other is through undefined bytes in SOH

Digital interface In accordance with ITU-T G.703 Rec.

Connector used Multi-pin connector for 120 balanced Coaxial connector, 27CP for 75 unbalanced


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1.2.17.3 Order Wire (OW)

Table 1.14 - Auxiliary Signal Interface (OW)

Transmission Bit insertion/separation to/from E1 and E2 of SOH.

Bit rate 64 kbit/s x 2 (equivalent to 2 CH telephony) Express orderwire and omnibus orderwire

Interface 2-W for internal telephone set and external use 4-W for branching connector

Interface level 2W Interface

Input level : 0.0 dBr nominal Output level : 2.0 dBr nominal


4W Interface

Input level : 4 dBr nominal (16 to 0.5 dBr, 0.5 step) Output level : 4 dBr nominal (8.5 to +7 dBr, 0.5 step)


1.2.17.4 User Channel (UC)

Table 1.15 - Auxiliary Signal Interface (User Channel)

Transmission Bit insertion/separation to/from F1 byte of SOH.

Bit rate 64 kbit/s x 1 (equivalent to 1 CH telephony) per STM-1

Interface 64 kbit/s

Interface Interface : Co-directional or contra directional

Pulse mask: In accordance with ITU-T G.703

Connector used Multi-pin connector


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1.3 Mechanical Specification

1.3.1 General

Rack has dimension as follows:

2200 mm height

600 mm width

300 mm depth

*1 The dimensions include all protruding parts

Figure 1.14 - Front view of (7+1) SRT 1F radio equipment

Base-Band Interface Unit (option)

Supervisory, Control & Switching Unit

RF Branching Network Unit

Main Signal Transmission Unit

BBIU

SCSU

MSTU

BRU

2200

600 300342.5*1


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1.3.2 Rack construction

It consists of:

Rack

RF Branching network part (BRU block)

Shelves with PCB backplane (MSTU/SCSU blocks)

Optional shelf with PCB backplane (BBIU blocks)

Slide-in-units(SIU)

The following connectors and power supply terminals are on the PCB backplane:

Multi-pin and co-axial connectors for data

Multi-pin connectors for alarm and status output for housekeeping bits

Power supply terminal from power supply system. The shelves comprise the main signal transmission unit (MSTU), supervisory control and switching unit (SCSU), baseband interface unit (BBIU) and RF branching network unit (BRU). A multi-layer PCB backplane is used for plug-in units. Multi-pin connectors on the backplane have high-reliability features and are provided with facilities which prevent wrong insertion. The BBIU shelf is used only for terminal configuration with optical interface. The RF branching network is housed above the MSTU shelf. The RF branching network consists of RF band pass filters and, circulators for channel separation. The RF branching network and the MSTU units are connected through semi-rigid coaxial cables with SMA coaxial connectors via an MSTU adapter. All units are of the plug-in type hence needing no wiring during the installation and maintenance works. Units have card-pullers for easy card extraction and unit locking. All units can be accessed through front panel.

1.3.3 Inter-Rack Connections

Inter-rack cabling and connections are made on the PCB backplane through multi-pin connectors.


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1.3.4 Rack Layout

Typical rack configurations for terminal and repeater stations are shown in Figure 1.15 and Figure 1.16. The terminal equipment has the following facilities;

One BRU

Maximum eight (8) MSTUs (8 RF system) per rack

One SCSU

One optional BBIU for STM-1 Optical interface The repeater equipment (one-end) has the following facilities;

One BRU

Maximum eight (8) MSTUs (8 RF system) per rack

One SCSU

Figure 1.15 - (7+1) Alternated operation Terminal Station

Vertical (V) and Horizontal (H) polarization

BBIU

SCSU

MSTU

BRU


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A co-channel operating terminal station (up to 1+7 system) consists of two (2) equipment racks of opposite polarization as shown in Figure 1.16.

Figure 1.16 - 2 x (7+1) Co-channel operating Terminal Station

H-polarization V-polarization

BBIU

SCSU

MSTU

BRU


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1.3.5 Unit Layout

Figure 1.17 shows the unit layout on the MSTU shelf. Maximum eight (8) MSTU units can be mounted in one MSTU.

Figure 1.17 - Front view of the MSTU shelf Figure 1.18 shows the unit layout on the SCSU. One block can accomodate, one SV unit, one TCU unit, and maximum seven (7) BSW units. In addition to the above units, one back-up TCU unit, two HK units, one OCC INTF unit, and two ECU units can be optionally mounted.

Figure 1.18 - Front view of the SCSU shelf

RPS Group 2 RPS Group 1


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Figure 1.19 shows the unit layout on the BBIU for STM-1 optical interface. One block can accomodate, a maximum of fifteen (15) OPT INTF units, seven (7) MSP SW units, and one BBC unit.

Figure 1.19 - Front view of the STM-1 optical interface BBIU shelf


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1.4 Environmental Specification

Temperature and Humidity Performance guaranteed within the solid line below

0 10 20 30 40 50 60 70 80 90 95

0

10

35

45

Relative Humidity (%)

Temperature (C)

Short term operation 5 to 50C Note : Short term is defined as a period not exceeding 72 consecutive hours or a total of 15 days per year. In this case equipment is operable, but performance is not guaranteed

Storage/shipping Temperature: 20C to +55C, Humidity: 0% to 95% (@35C)

Altitude

Performance guaranteed Up to 3,500 meters Storage/shipping Up to 15,000 meters

Vibration

In accordance with ETSI

Electro-Magnetic Compatibility

Electrostatic discharge IEC 801-2

Level 3 (4 kV direct discharge) without any malfunction Level 4 (8 kV direct discharge) with some degraded performance, but without damage

Radiated emission In accordance with CISPR Pub.22 CLASS A, 10m method < 39.5 dB V/m for 30.0 to 230.0 MHz < 46.5 dB V/m for 230.0 to 1000.0 MHz

Conducted emission In accordance with CISPR Pub.22 CLASS A < 66 dB V/m for 0.15 to 0.5 MHz (average energy) < 60 dB V/m for 0.5 to 30.0 MHz (average energy)

Radiated susceptibility In accordance with IEC 801-3 3 V/m, swept 80 MHz to 1 GHz without any malfunction


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1.5 Power Requirements

1.5.1 General

All the equipment is DC power supplied with positive ground.

DC input voltage, 48V (36 V to 72 V) is available.

The power supply circuits of all the equipment provide the following: Over current protection (Secondary)

Over voltage protection (Secondary)

Surge protection (Primary) : Vp = 2 kV

Rise and fall time (Vp/2) : tr = 1.2 sec, tf = 50 sec. A power supply switch with non-fuse breaker is located on each MSTU, SCSU, and BBIU.

1.5.2 Unit Power Consumption

The power consumption of each unit is shown in Table 1.16 - Power Consumption of each unit.

Table 1.16 - Power Consumption of each unit

No. Unit Pc (W) Remarks 1 MSTU without XPIC 170 + 32 dBm output with SD

2 MSTU with XPIC 173 + 32 dBm output with SD

3 SV 20

4 TCU 10

5 BSW 1.3/9*1 secondary +5V from MSTU-P

6 BSW INTF 1.4 secondary +5V from MSTU-P

7 HK (optional unit) 3.2 secondary +5V from SV

8 ECU (optional unit) 2 secondary +5V from SV

9 OPT INTF (optional unit) 24

10 PE INTF (optional unit) 27

11 BBC (optional unit) 4.3

12. MSP SW (optional unit) 0.3 secondary +5V from OPT INTF Note1: Under working of protection channel.

Note: Unit power consumption includes efficiency of power supply module. (80 %)


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1.6 Frequency Plan and Antenna System

1.6.1 General Information

Table 1.17 shows the ITU-R recommendations for the radio frequency plan.

Table 1.17 - ITU-R Recommendations.

Band Recommendation

U4 GHz band ITU-R Recommendation F.382-6

4 GHz band ITU-R Recommendation F.635-3

5 GHz band ITU-R Recommendation F.1099 Annex-1

L6 GHz band ITU-R Recommendation F.383-5







1.6.2 Frequency Plan

The frequency allocation for the Upper 4 GHz band is as follows: 3803.5 to 4203.5 MHz

Center frequency 4003.5 MHz

Guard band 21 MHz (Lower band and upper band)

Center gap 68 MHz

29 MHz frequency spacing (co-channel operation) 58 MHz frequency spacing (alternated operation)

213 MHz transmit-receive frequency spacing

5+1 protection system for alternated operation 2(5+1) protection system for co-channel operation

Specified RF frequency shown in Figure 1.20.


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The frequency allocation for the 4 GHz band is as follows: 3600 to 4200 MHz

Center frequency 3900 MHz


Center gap 80 MHz




Specified RF frequency, shown in Figure 1.21

The frequency allocation for the 5 GHz band is as follows: 4400 to 5000 MHz



Center gap 60 MHz





The frequency allocation for the Lower 6 GHz band is as follows: 5925 to 6425 MHz


Guard band 20.2 MHz (Lower band) and 20.21 MHz (Upper band)

Center gap 44.49 MHz

29.65 MHz frequency spacing (co-channel operation) 59.30 MHz frequency spacing (alternated operation)

252.04 MHz transmit-receive frequency spacing

7+1 protection system for alternated operation 2(7+1)protection system for co-channel operation



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The frequency allocation for the Upper 6 GHz band is as follows: 6430 to 7110 MHz



Center gap 60 MHz







Guard band 10 MHz (Lower band) and 17 MHz (Upper band)

Center gap 49 MHz

56 MHz frequency spacing (alternated operation)


4+1 protection system for alternated operation


The frequency allocation for the Upper 7 GHz band is as follows: 7425 to 7725 MHz



Center gap 42 MHz






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Guard band

Center gap 103.77 MHz

29.65 MHz frequency spacing (co-channel operation) 59.30 MHz frequency spacing (alternated operation)

311.32 MHz transmit-receive frequency spacing





Guard band 15 MHz for 12 pair system

Center gap 90 MHz for 12 pair system







Guard band 15 MHz (Lower band) and 23 MHz (Upper band)

Center gap 70 MHz




Specified RF frequency, shown in Figure 1.29.


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1.6.2.1 U4 GHz Band Frequency Allocation (ITU-R F.382-6)

1 2 3 4 5 61 2 3 4 5 6

400 MHz

213 MHz

21 MHz21 MHz 58 MHz

29 MHz68 MHz

V(H)

H(V)

1x 2x 3x 4x 5x 6x

1 2 3 4 5 6

1x 2x 3x 4x 5x 6x

1 2 3 4 5 6

400 MHz

213 MHz

21 MHz21 MHz 58 MHz

29 MHz68 MHz

V(H)

H(V)

Co-channel operation

Alternated operation

Figure 1.20 - U4 GHz Band Frequency Allocation (ITU-R F.382-6)

Table 1.18 - U4 GHz Band Frequency Allocation (ITU-R F.382-6) RF CH RF FREQUENCY(MHz) LO FREQUENCY(MHz)

1 3824.5 2980.5

2 3853.5 3009.5

3 3882.5 3038.5

4 3911.5 3067.5

5 3940.5 3096.5

6 3969.5 3125.5

1' 4037.5 3193.5

2' 4066.5 3222.5

3' 4095.5 3251.5

4' 4124.5 3280.5

5' 4153.5 3309.5

6' 4182.5 3338.5


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1.6.2.2 4 GHz Band Frequency Allocation (ITU-R F. 635-3)

1 2 3 4 5 6 7

600 MHz

320 MHz

20 MHz 80 MHz

40 MHz80 MHz

V(H)

H(V)

1x 2x 3x 4x 5x 6x 7x1x 2x 3x 4x 5x 6x 7x

1 2 3 4 5 6 7

600 MHz

320 MHz

20 MHz20 MHz 80MHz

40 MHz80 MHz

1 2 3 4 5 6 7

V(H)

H(V)



1 2 3 4 5 6 7

20 MHz

Figure 1.21 - 4 GHz Band Frequency Allocation (ITU-R F. 635-3)

Table 1.19 - 4 GHz Band Frequency Allocation (ITU-R F. 635-3) RF CH RF FREQUENCY(MHz) LO FREQUENCY(MHz)

1 3620.0 2776.0

2 3660.0 2816.0

3 3700.0 2856.0

4 3740.0 2896.0

5 3780.0 2936.0

6 3820.0 2976.0

7 3860.0 3016.0

1 3940.0 3096.0

2 3980.0 3136.0

3 4020.0 3176.0

4 4060.0 3216.0

5 4100.0 3256.0

6 4140.0 3296.0

7 4180.0 3336.0


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1.6.2.3 5 GHz Band Frequency Allocation (ITU-R F.1099 Annex-1)

1 2 3 4 5 6 7

600 MHz300 MHz

30 MHz 80 MHz

40 MHz60 MHz

V(H)

H(V)

1x 2x 3x 4x 5x 6x 7x1x 2x 3x 4x 5x 6x 7x

1 2 3 4 5 6 7

600 MHz

300 MHz

30 MHz30 MHz 80MHz

40 MHz60 MHz

1 2 3 4 5 6 7

V(H)

H(V)



1 2 3 4 5 6 7

30 MHz

Figure 1.22 - 5 GHz Band Frequency Allocation (ITU-R F.1099 Annex-1)

Table 1.20 - 5 GHz Band Frequency Allocation (ITU-R F.1099 Annex-1)

RF CH RF FREQUENCY(MHz) LO FREQUENCY(MHz)

1 4430.0 3586.0

2 4470.0 3626.0

3 4510.0 3666.0

4 4550.0 3706.0

5 4590.0 3746.0

6 4630.0 3786.0

7 4670.0 3826.0

1 4730.0 3886.0

2 4770.0 3926.0

3 4810.0 3966.0

4 4850.0 4006.0

5 4890.0 4046.0

6 4930.0 4086.0

7 4970.0 4126.0


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1.6.2.4 L6 GHz Band Frequency Allocation (ITU-R F. 383-5)

1 2 3 4 5 6 78

252.04 MHz

20.2 MHz 59.3 MHz

29.65 MHz

V(H) H(V)

1x 2x 3x 4x 5x 6x 7x8

1 2 3 4 5 6 78

252.04 MHz

20.2 MHz 59.3 MHz

29.65 MHz

V(H) H(V)



500 MHz

44.49 MHz

1 2 3 4 5 6 7 8

20.21 MHz

1x 2x 3x 4x 5x 6x 7x 8

500 MHz

20.21 MHz

44.49 MHz

1 2 3 4 5 6 7 8

Figure 1.23 - L6 GHz Band Frequency Allocation (ITU-R F. 383-5)

Table 1.21 - L6 GHz Band Frequency Allocation (ITU-R F. 383-5) RF CH RF FREQUENCY (MHz) LO FREQUENCY (MHz)

1 5945.20 5101.20

2 5974.85 5130.85

3 6004.50 5160.50

4 6034.15 5190.15

5 6063.80 5219.80

6 6093.45 5249.45

7 6123.10 5279.10

8 6152.75 5308.75

1 6197.24 5353.24

2 6226.89 5382.89

3 6256.54 5412.54

4 6286.19 5442.19

5 6315.84 5471.84

6 6345.49 5501.49

7 6375.14 5531.14

8 6404.79 5560.79


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1.6.2.5 U6 GHz Band Frequency Allocation (ITU-R F. 384-5)

1 2 3 4 5 6 78

340 MHz

30 MHz 80 MHz

40 MHz

V(H) H(V)

1x 2x 3x 4x 5x 6x 7x 8

1 2 3 4 5 6 78

340 MHz

30 MHz 30

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