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Siemens BS-240 User Manual

Siemens BS-240
70 pages
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Information
Base Station System
Technical Description (TED:BSS)
BS-240/241
A30808-X3247-L14-2-7618

Table of Contents

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Siemens BS-240 Specifications

General IconGeneral
Breaking capacity6 kA
Mounting typeDIN rail
StandardsIEC 60898-1
Rated current40 A
Number of poles1P, 2P, 3P, 4P

Summary

Safety and Operational Notices

Important Notice on Product Safety

Provides critical safety instructions for system installation and operation.

Caution

Details equipment compliance with standards and operating guidelines.

Document Revision Details

Reason for Update

Explains the purpose and changes for the current document release.

Issue History

Lists previous versions and their release dates and reasons.

1 Introduction

1.1 Main Features

Highlights system capabilities, configurations, and supported services.

1.2 Technical Data

Presents key technical specifications like TRX capacity, dimensions, and power.

2 Hardware Architecture

2.1 Board Redundancy

Ensures system survival through modular architecture and split functions.

2.2 Power Amplifier Output Level

Details typical output power levels for various modulation schemes and frequencies.

2.3 Rack Configuration

Describes the different rack types and expandable configurations for BS-240/241.

3 Description of Modules

3.1 Core (COBA and COSA)

Details the function, configuration, and redundancy of Core boards.

3.2 Carrier Unit (CU)

Handles carrier-oriented tasks, including signal processing and RF amplification.

3.3 EDGE Carrier Unit

Supports EDGE functionality with modified CU hardware for higher performance.

3.5 Duplexer Amplifier Multi Coupler (DUAMCO)

Combines TX/RX paths for single antenna, includes LNA, splitter, and ASU.

3.7 Filter Combiner (FICOM)

Combines up to 8 frequencies for TX in one rack with low insertion loss.

3.12 AC/DC Converter (AC/DC)

Provides AC distribution, DC distribution, and power for system operation.

4 Antenna Combiners and Receiving Paths

4.1 Methods of Combining

Explains module combinations for performance and cost-effectiveness.

4.1.1 Typical Combiner Losses (TX path) and Output Power Level

Presents typical insertion losses for various combiner types and bands.

4.1.2 DUAMCO - DIAMCO GAIN (RX Path)

Provides gain parameters for DUAMCO and DIAMCO in AMCO and MUCO modes.

4.1.3 Parameters of Tower Mounted Amplifier (TMA)

Specifies electrical and system parameters for 900 MHz TMAs.

4.2 Receiving Paths

Discusses antenna diversity techniques and system modules for optimal reception.

4.2.2 Receiver Sensitivity

Explains methods to achieve optimal receiver sensitivity using DUAMCOs, DIAMCOs, and TMAs.

4.3 Transmission Diversity Time Delay

Describes feature for combining carrier units to increase output power and reduce fading.

4.4 FCC Issues (for US Market only)

Details maximum RF output power values for US market compliance.

5 Power Supply and Battery Backup

5.1 Support of Emergency Operation for 3rd Party BBU System

Describes emergency configuration triggered by battery discharge alarm.

6 Abbreviations

Glossary of Technical Terms

Provides definitions for technical terms and acronyms used in the document.

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