BS-240XL Product Description

Nokia Siemens Networks GSM/EDGE BSS, rel. RG10(BSS), operating documentation, issue 05

BTSplus description

BS-240XL product description

DN0932873

2DN0932873


Id:0900d8058064adcb

The information in this document is subject to change without notice and describes only the product defined in the introduction of this documentation. This documentation is intended for the use of Nokia Siemens Networks customers only for the purposes of the agreement under which the document is submitted, and no part of it may be used, reproduced, modified or transmitted in any form or means without the prior written permission of Nokia Siemens Networks. The documentation has been prepared to be used by professional and properly trained personnel, and the customer assumes full responsibility when using it. Nokia Siemens Networks welcomes customer comments as part of the process of continuous development and improvement of the documentation.

The information or statements given in this documentation concerning the suitability, capacity, or performance of the mentioned hardware or software products are given "as is" and all liability arising in connection with such hardware or software products shall be defined conclusively and finally in a separate agreement between Nokia Siemens Networks and the customer. However, Nokia Siemens Networks has made all reasonable efforts to ensure that the instructions contained in the document are adequate and free of material errors and omissions. Nokia Siemens Networks will, if deemed necessary by Nokia Siemens Networks, explain issues which may not be covered by the document.

Nokia Siemens Networks will correct errors in this documentation as soon as possible. IN NO EVENT WILL Nokia Siemens Networks BE LIABLE FOR ERRORS IN THIS DOCUMENTA-TION OR FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO SPECIAL, DIRECT, INDI-RECT, INCIDENTAL OR CONSEQUENTIAL OR ANY LOSSES, SUCH AS BUT NOT LIMITED TO LOSS OF PROFIT, REVENUE, BUSINESS INTERRUPTION, BUSINESS OPPORTUNITY OR DATA,THAT MAY ARISE FROM THE USE OF THIS DOCUMENT OR THE INFORMATION IN IT.

This documentation and the product it describes are considered protected by copyrights and other intellectual property rights according to the applicable laws.

The wave logo is a trademark of Nokia Siemens Networks Oy. Nokia is a registered trademark of Nokia Corporation. Siemens is a registered trademark of Siemens AG.

Other product names mentioned in this document may be trademarks of their respective owners, and they are mentioned for identification purposes only.

Copyright © Nokia Siemens Networks 2009. All rights reserved

f Important Notice on Product Safety Elevated voltages are inevitably present at specific points in this electrical equipment. Some of the parts may also have elevated operating temperatures.

Non-observance of these conditions and the safety instructions can result in personal injury or in property damage.

Therefore, only trained and qualified personnel may install and maintain the system.

The system complies with the standard EN 60950 / IEC 60950. All equipment connected has to comply with the applicable safety standards.

The same text in German:

Wichtiger Hinweis zur Produktsicherheit

In elektrischen Anlagen stehen zwangsläufig bestimmte Teile der Geräte unter Span-nung. Einige Teile können auch eine hohe Betriebstemperatur aufweisen.

Eine Nichtbeachtung dieser Situation und der Warnungshinweise kann zu Körperverlet-zungen und Sachschäden führen.

Deshalb wird vorausgesetzt, dass nur geschultes und qualifiziertes Personal die Anlagen installiert und wartet.

Das System entspricht den Anforderungen der EN 60950 / IEC 60950. Angeschlossene Geräte müssen die zutreffenden Sicherheitsbestimmungen erfüllen.

DN0932873 3


Id:0900d8058064adcb

Table of ContentsThis document has 88 pages.

Summary of changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91.2 Overview of the functionality - main features of BS-240XL . . . . . . . . . . 10

2 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3 Hardware architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133.1 Rack configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4 Module description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194.2 Core modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234.2.1 Core basis (COBA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254.2.2 Core satellite (COSA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264.2.3 Core link extension (COREXT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264.2.4 Core redundancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274.3 Carrier related modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304.3.1 Carrier units (CU). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304.3.2 GSM carrier unit (GCU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304.3.3 EDGE carrier unit (ECU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304.3.4 Flexible carrier unit (FlexCU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314.3.5 Carrier unit output power level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324.4 Antenna combining modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334.4.1 Duplexer amplifier multicoupler (DUAMCO) . . . . . . . . . . . . . . . . . . . . . 334.4.2 Flexible duplexer amplifier multicoupler (FDUAMCO) . . . . . . . . . . . . . . 344.4.3 MFDUAMCO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344.4.4 Co-amplifier multicoupler (COAMCO8) . . . . . . . . . . . . . . . . . . . . . . . . . 344.4.5 Hybrid extension module for MFDUAMCO (HYBRID4) . . . . . . . . . . . . . 354.4.6 Dual Integrated Amplifier Multicoupler (DIAMCO) . . . . . . . . . . . . . . . . . 354.4.7 Mast head amplifier / tower mounted amplifier (MHA/TMA) . . . . . . . . . 364.4.8 Filter combiner with six TNFs (FICOM6) . . . . . . . . . . . . . . . . . . . . . . . . 384.4.9 Filter combiner (FICOM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 394.4.10 High power duplexer (HPDU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 394.5 Power supply modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404.5.1 AC/DC system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404.5.2 Backup battery (BATTPACK). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404.5.3 DC mains supply unit (MSU:DC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 414.5.4 AC mains supply unit (MSU:AC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 414.5.5 DC and battery controller (DCBCTRL). . . . . . . . . . . . . . . . . . . . . . . . . . 424.5.6 DC panel (DCP). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 424.5.7 Alarm collection terminal boards (ACTC, ACTP, ACTM). . . . . . . . . . . . 424.6 Abis interface modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 444.6.1 Overvoltage protection and tracer (OVPT) . . . . . . . . . . . . . . . . . . . . . . 444.6.2 Abis connection (ABISCON) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

4DN0932873


Id:0900d8058064adcb

4.6.3 Ethernet connector module (ETHCON) . . . . . . . . . . . . . . . . . . . . . . . . . 454.7 Abis link equipment (LE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 474.8 Dust filter (DUSTFILM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 474.9 Fan unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

5 Antenna combining . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 485.1 MFDUAMCO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 495.2 FDUAMCO / DUAMCO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 545.2.1 DUAMCO specials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 565.2.2 FDUAMCO specials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 585.3 COAMCO8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 605.4 DIAMCO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 635.5 Antenna line equipment MHA/TMA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 665.6 FICOM6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 705.7 FICOM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 755.8 HPDU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 775.9 Diplexer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

6 Cell configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

7 FCC issues (for U.S. market only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

DN0932873 5


Id:0900d8058064adcb

List of FiguresFigure 1 Base rack. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Figure 2 Functional blocks of a BS-240XL (configuration example) . . . . . . . . . . 14Figure 3 Base rack and extension rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Figure 4 Service racks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Figure 5 Connection of core modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Figure 6 Example of a configuration with COBA4P12 and COREXT . . . . . . . . . 27Figure 7 Example of a configuration with CESCOBA and COREXT . . . . . . . . . . 27Figure 8 FlexCU – Double TRX mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31Figure 9 FlexCU – Single TRX mode – Fourfold receive diversity mode. . . . . . . 32Figure 10 ABISCON and OVPT (100/120 Ω ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44Figure 11 Example of a configuration of a CESCOBA with ETHCON and COSA4P12

46Figure 12 MFDUAMCO block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51Figure 13 HYBRID4 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52Figure 14 DUAMCO 2:2 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57Figure 15 DUAMCO 4:2 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57Figure 16 DUAMCO 8:2 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58Figure 17 FDUAMCO block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59Figure 18 COAMCO8 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60Figure 19 COAMCO with FDUAMCO in 4:2 mode (= 8:2 mode). . . . . . . . . . . . . . 61Figure 20 COAMCO8 with MFDUAMCO and HYBRID4 (8/0/0) . . . . . . . . . . . . . . 62Figure 21 DIAMCO block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64Figure 22 TMA (single) block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67Figure 23 MHA / TMA (dual) block diagram (RET only at MHA) . . . . . . . . . . . . . . 67Figure 24 FICOM6 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73Figure 25 FICOM 8:1 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76Figure 26 HPDU 8 TRXs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77Figure 27 HPDU 8 TRXs with DUBIAS and TMA . . . . . . . . . . . . . . . . . . . . . . . . . 78Figure 28 Configuration with diplexer (example) . . . . . . . . . . . . . . . . . . . . . . . . . . 79Figure 29 Multi-Cell (4,4,4): with 3 DUAMCO 4:2 . . . . . . . . . . . . . . . . . . . . . . . . . 80Figure 30 Single-Cell (12,0,0): with 2 DUAMCO 8:2 . . . . . . . . . . . . . . . . . . . . . . . 81Figure 31 Single-Cell (12,0,0): with 3 DUAMCO 4:2 . . . . . . . . . . . . . . . . . . . . . . . 81Figure 32 Multi-Cell (8,8,8): with 4 DUAMCO 8:2 (base and extension rack) . . . . 82Figure 33 Multi-Cell (12,12,0): with 4 DUAMCO 8:2 (base and extension rack) . . 82Figure 34 FDUAMCO configuration 2:2 or 4:2. . . . . . . . . . . . . . . . . . . . . . . . . . . . 83Figure 35 Configuration 8:2 with FDUAMCO and COAMCO8. . . . . . . . . . . . . . . . 83

6DN0932873


Id:0900d8058064adcb

List of TablesTable 1 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Table 2 GSM frequency bands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Table 3 Main units and modules (overview) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Table 4 Core configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Table 5 Carrier unit output power level (typical and guaranteed values) . . . . . . 32Table 6 Possible TMA substitutions with MHA . . . . . . . . . . . . . . . . . . . . . . . . . . 36Table 7 FICOM6 and FDUAMCO: Insertion losses – comparison . . . . . . . . . . . 38Table 8 MFDUAMCO: Insertion loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52Table 9 MFDUAMCO: Gain (guaranteed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53Table 10 DUAMCO: Insertion loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55Table 11 FDUAMCO: Insertion loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55Table 12 DUAMCO: Gain (guaranteed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56Table 13 FDUAMCO: Gain (guaranteed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56Table 14 DIAMCO: Gain (guaranteed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65Table 15 MHA: electrical parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68Table 16 MHA: mechanical parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68Table 17 TMA: electrical parameters (guaranteed) . . . . . . . . . . . . . . . . . . . . . . . 69Table 18 TMA: mechanical parameters (guaranteed) . . . . . . . . . . . . . . . . . . . . . 69Table 19 FICOM6: Insertion loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74Table 20 FICOM6: Gain (guaranteed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74Table 21 FICOM: Insertion loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76Table 22 HPDU: Insertion loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77Table 23 Power reduction of the carrier units (ECU/FlexCU 850) at antenna port .

84Table 24 Power reduction of the carrier units (ECU/FlexCU 1900) at antenna port

85

DN0932873 7

BS-240XL product description Summary of changes

Id:0900d8058057903e

Summary of changesChanges between document issues are cumulative. Therefore, the latest document issue contains all changes made to previous issues.

Issue 01 for release RG10(BSS)

Issue Date Summary

01 07/2009 First edition for release RG10(BSS)

8DN0932873


Id:0900d8058057903e

Summary of changes

DN0932873 9

BS-240XL product description Introduction

Id:0900d8058064b064

1 Introduction

1.1 GeneralThis manual is applicable for the releases from BR8.0 onward.

The architecture of the BS-240XL provides maximum flexibility to develop highest capacity BTSs with reduced volume per TRX and an expanded number of 24 TRXs in 2 racks (48 TRXs with FlexCU).

The maximum number of managed TRXs by the Flexi BSC product family is 32 at one site. One site is represented by a BCF object.

The BS-240XL represents the mainline of the base stations. The modular design principle with a low number of different modules ensures easy installation, commissioning and operating, as well as low training costs and mainte-nance expenses with a minimal spare parts pool required. The advanced technology guarantees low operational costs and an optimum economy of scale. Homogenous service throughout the network is assured by common BTS software running on all the platforms.

The modular architecture and the flexible internal structure enable the BS-240XL to provide new GSM features such as enhanced data rates for GSM evolution (EDGE). This platform ensures that network evolution is as smooth as possible.

Any operation for rack extension or TRX substitution doesn’t involve service interruption.And also software-driven redundancy for core, power supply and broadcast channel modules offer highest reliability end enable hot swapping of modules without service interruption.

The provision of a full spectrum of combining equipment allows high power and mini-mized number of antennas in connection with a high receiver sensitivity.

10DN0932873


Id:0900d8058064b064

Introduction

1.2 Overview of the functionality - main features of BS-240XL • Casing variants: Indoor version only

• Minimum configuration:– one base rack with up to 24 TRX

• Maximum configuration: – 2 racks with an entire quantity of 48 carriers (1 base and 1 extension rack)– 5 racks housing power supply modules, battery backup and line equipment

(service1 and service2 racks)

• Cell configurations: – Up to 6 cells per rack– Up to 12 cells per BTS– Concentric omnicell: one cell with inner and complete supply area– Concentric multicells: multicell with several sectors plus inner supply area

• Frequency configurations: – Single band (GSM 850, GSM 900, GSM 1800 and GSM 1900)– Dual band (see below)– Mixed cell configuration to enlarge GSM 900 cells with GSM 1800 frequencies,

or GSM 850 cells with GSM 1900 frequencies– Single cell– Multi cell

• Dual band configurations: – GSM 900 and GSM 1800 – GSM 900 and GSM 1900 – GSM 850 and GSM 1900

• Frequency hopping – Synthesizer frequency hopping– Baseband frequency hopping

• Combining options: – Antenna combining with duplexers ((MF/F)DUAMCO and COAMCO) for up to

8 carriers with RF amplifier and multicoupler for the RX path– Antenna combining for the TX path with filter combiners (FICOM) for up to 8

carriers per antenna– Antenna combining for the RX path with amplifying multicouplers (DIAMCO) for

up to 24 carriers– Duplexing of RX and TX path with high power duplexer (HPDU)– Mixed Configurations of cells/sectors applying all types of carrier units: normal

Carrier Units (CU and GCU), EDGE Carrier Units (ECU) and Flexible Carrier Units (FlexCU)

DN0932873 11

BS-240XL product description Introduction

Id:0900d8058064b064

• Traffic channels: – Full rate (FR)– Half rate (HR)– Enhanced full rate (EFR)– Adaptive multi rate codec (AMR)

• Services:– GPRS– HSCSD– EDGE

• Redundancy: – Support of 1:1 core redundancy– Support of BCCH redundancy– Support of TRX redundancy without using any second frequency

(from BR10 onward)– Support of n+1 power supply redundancy

• Abis interface configurations: – Star, cross connect, and multidrop configurations are possible– Change of PCM line configuration from star to multidrop and vice versa is

possible without any interruption of service

• External Abis link media can be connected via E1/T1:– Wire– Fiber optic– Microwave

12DN0932873


Id:0900d8058064b066

Technical data

2 Technical data

Characteristics BS-240XL (indoor)

Dimensions (H x W x D) (base and extension rack) 2025 mm x 600 mm x 450 mm(6’7” x 2’ x 1’5”)

Max. TRX per BTS (in more than one rack) 24 (48 with FlexCUs)

Max. TRX per cell (in more than one rack) 24

Max. TRX per site managed by Flexi BSC product family. Site is represented by BCF object.

32

Volume net 547 liters

Typical power consumption base rack 1960 W with CUs2830 W with ECUs3685 W with 12 FlexCUs

Typical power consumption extension rack 1875 W with CUs2740 W with ECUs3560 W with 12 FlexCUs

Weight of basic racks in typical configuration ca. 250 kg (551 Lbs)

Weight of extension racks in typical configuration ca. 250 kg (551 Lbs)

Weight of service1 rack in configuration:AC/DC (2x); F:Battery 2x (type A400/85)

ca. 425 kg (937 Lbs)

Weight of service2 rack in configuration:F:Battery 3x (type A400/85)

ca. 510 kg (1124 Lbs)

Temperature range -5 °C to + 45 °C+23 °F to +113 °F

Ingress protection rating IP20

Table 1 Technical data

GSM frequency band Uplink (MHz) Downlink (MHz)

GSM 850 824 - 849 869 - 894

P-GSM 900 (Primary GSM) 890 - 915 935 - 960

E-GSM 900 (Extended GSM) 880 - 915 925 - 960

R-GSM 900 (Railway GSM) 876 - 915 921 - 960

GSM-RE 900 (GSM Railway Extension) 876 - 901 921 - 946

GSM-PS 900 (P-GSM Shifted to E-GSM) 880 - 905 925 - 950

GSM 1800 1710 - 1785 1805 - 1880

GSM 1900 1850 - 1910 1930 - 1990

Table 2 GSM frequency bands

DN0932873 13

BS-240XL product description Hardware architecture

Id:0900d8058054381a

3 Hardware architectureThe BS-240XL is designed to achieve commonality of boards to serve GSM 850, GSM 900 (with frequency variants), GSM 1800 and GSM 1900.

Figure 1 Base rack

Figure 2 shows the BTS functional blocks of the BS-240XL.

14DN0932873


Id:0900d8058054381a

Hardware architecture

Figure 2 Functional blocks of a BS-240XL (configuration example)

carrier units

Base Rack

Service Rack

carrier units

COSA

ACTM

CAN BUS

CC-Links

RX

RXDIV

ACTC ACTP

LE 0 LE 1

BATTERY

DCB-

ACP

CTRL

ACTC

FAN

Cell 0

ACTC ACTP

FAN

BATTERY

DCB-CTRL

AC/DCAC/DC

DCP

DCP

DCP

Extension Rack

COBA

2 PCM

Ext. Sync.

2 PCM

4 PCM

Abis

Sync.

Abis

FAN

3xTX

3xTX

RX

RXDIV

3xTX

3xTX

Cell 1

RX

RXDIV

3xTX

3xTX

RX

RXDIV

3xTX

3xTX

Cell 2

Cell 3

OVPT

OVPT

OASI

(e.g. FlexCU)

(e.g. FlexCU)

(e.g.COBA4P12)

(e.g.COSA4P12)6 ..11

0 .. 5

carrier units(e.g. FlexCU)

0 ..5

carrier units(e.g. FlexCU)

6 ..11

MFDUAMCO

duplexer,e.g.

MFDUAMCO

duplexer,e.g.

MFDUAMCO

duplexer,e.g.

MFDUAMCO

duplexer,e.g.

DN0932873 15


Id:0900d8058054381a

The architecture of BS-240XL provides maximum flexibility to develop large and small BTSs.

Up to 8 PCM lines can be connected to the core boards. The core boards are scalable (COBA, COSA). In addition, also the BTS itself is scalable. It is possible to connect one extension rack to a base rack.

The main communication between the modules is provided by means of bi-directional serial links (CC-Links) between the carrier units and the core modules. These CC-links handle the entire communication between BTS core and carrier units. Baseband fre-quency hopping is also supported.

All alarms, besides the alarms generated in the COBA and in the carrier units, are trans-ported via the CAN bus. Alarms of the carrier units are transmitted via CC-link.

The carrier unit provides all analog and digital signal processing including an RF power stage necessary to process a single carrier (e.g. GSM 8 TCHs). The carrier unit(s) inter-face with the combining equipment on the one side and with the core modules on the other. The core modules provide functions common to all carriers within the BTS (e.g. clock generation, O&M processing,...) as well as LAPD processing for the carriers.

Legend:

AC/DCACPACTCACTMACTPCANCOBACOSADCBCTRLDCPDIAMCOMFDUAMCOFlexCULEOASIOVPT

AC/DC RectifierAC PanelAlarm Collection Terminal Connection Alarm Collection Terminal Master for base rack (optional)Alarm Collection Terminal Processor for extension and slave rack Controller Area NetworkCore BasisCore SatelliteDC and Battery ControllerDC PanelDI(2) Amplifier MulticouplerMulti-Standard Flexible Duplex Amplifier MulticouplerFlexible Carrier UnitLink EquipmentOperator Available Serial InterfaceOver Voltage Protection

16DN0932873


Id:0900d8058054381a


3.1 Rack configurationThe BS240XL consists of one base rack and one optional extension rack and up to five optional service racks.

There are four different types of racks:– Base rack (with core modules)– Extension rack (for more then 12 carrier units)– Service1 rack (with AC/DC, LE and batteries)– Service2 rack (for LE and batteries)

It is possible to connect up to 2 racks together (1 base rack, 1 extension rack; the more possible racks called service racks are not part of a rack extension in the proprietary sense) that realizes then the performance of a 24 TRX BTS (48 with FlexCU) as shown in Figure 3:

DN0932873 17


Id:0900d8058054381a

Figure 3 Base rack and extension rack

Two basic kinds of service rack exist: one being connected to the AC mains with the AC/DC system (service1 rack) and one for installation of LE and batteries (service2 rack). The service rack is represented in the Figure 4 Service racks.

Legend:

ACOM Antenna combining module

ACOM

0

ACOM

1

ACOM

2

ACOM

3

CU

4

CU

5

CU

10

CU

11

MU

CO

2

MU

CO

3

CU

0

CU

1

CU

6

CU

7

CO

BA

0C

OS

A 0

CO

BA

1C

OS

A1

ACOM

0

ACOM

1

ACOM

2

ACOM

3

DC-PANELACTC

CU

4

CU

5

CU

10

CU

11

MU

CO

2

CU 0

CU

1

CU 6

CU 7

FAN 0 FAN 1

DC-PANELACTC

FAN 0 FAN 1

FAN 2 FAN 3

FAN 6 FAN 7

FAN 2 FAN 3

FAN 6 FAN 7

CU

2

CU

3

CU

8

CU

9

MU

CO

0

MU

CO

1

CU

2

CU

3

CU

8

CU

9

MU

CO

0

MU

CO

1

FAN 4 FAN 5 FAN 4 FAN 5

MU

CO

3

18DN0932873


Id:0900d8058054381a


Figure 4 Service racks

DN0932873 19

BS-240XL product description Module description

Id:0900d805805712e3

4 Module description This chapter describes the modules within the BTS. After an overview of all modules, the most relevant modules are described in detail.

Racks, mounting kits, and cover parts are not described in detail. For more information, see “Hardware descriptions” and “Install and commision”.

4.1 Overview This manual describes the technical details of BS-240XL for different releases. For the information which module is supported by which release, refer to the following sections.

Name/Type F-V1) Remarks

Core modules: COBA COSACOREXT

M:COBA2P8VxM:COBA4P12VxM:CESCOBAVxM:COSA6P16M:COSA4P12VxM:COREXTVx

No Core basis, core satellite and core link extension modules (the last two modules increase the number of PCM lines and CC-links) can be equipped only in the base rack. They provide up to 8 PCM lines.

CU CUGVxCUDVxCUPVx

Yes Carrier units receive and convert RF signals into TRAU frames/signaling data (for uplink) and vice versa (for downlink).

The carrier units can be equipped in the base and extension racks. All types may be mixed.

GCU GCUGVxGCUDVx

Yes

ECU ECU850HPVxECU850VxECUGVxECUDVx, ECUDHPVxECUPVx, ECUPHPVx

Yes

FlexCU FCU850VxFCUGVxFCUDVxFCUPVx

Yes

Table 3 Main units and modules (overview)

20DN0932873


Id:0900d805805712e3

Module description

DUAMCOFDUAMCOMFDUAMCOHYBRID4 COAMCOFICOM6FICOMDIAMCOHPDU

DUAMCO2xDUAMCO4xDUAMCO8xFDUAMCO (x:2 mode)MFDUAMCO850VxMFDUAMCOEGVxMFDUAMCOPGVxMFDUAMCOPS5VxMFDUAMCOREVxMFDUAMCODVxMFDUAMCOPVxHYBRID4G8VxHYBRID4DPVxCOAMCO8DPVx COAMCO8G8Vx FICOM6EGVxFICOM6DVxFICOMxDIAMCOxHPDUx

Yes Antenna system modules can be equipped in the base and extension racks.

The MFDUAMCO is the successor of the FDUAMCO. The hybrid extensions are available for 850/900 MHz and for 1800/1900 MHz.

BS-240XL can be also configured with 6 ACOM slots in base and extension rack instead of DIAMCO slots.

In addition a version of extension rack with only 4 ACOM slots exists.

The FICOM6 is the successor of the FICOM and available from BR10 onward.

TMA TMAxSTMAxDTMAx

Yes Optional module that connects the antenna with the BTS in order to amplify the receive signal and pass through the transmit signal. Different TMAs are avail-able for different transmit frequencies.

MHA MDTA850VxMDGA900VxMDDA1800VxMDPA1900Vx

Yes Mast head amplifiers are optional modules that connect the antenna with the BTS in order to amplify the receive signal. MDxA are feasible only with BTS versions with MFDUAMCO from BR9 onward or with FICOM6 from BR10 onward. Different MHAs exist for different frequency bands.

OVPTABISCON

M:OVPTVxM:OVPTKOAXVxM:ABISCONVxM:ABISCONCXVx

No The overvoltage protection and tracer and the Abis connection modules are optional modules and can be installed alternatively. It: • can be equipped in the base rack • supports 100 Ω /120 Ω balanced line or 75 Ω

coaxial line

ETHCON ETHCONVx No The Ethernet connector module is necessary to support the CESoPSN functionality in combination with a CESCOBA.

LE ---- No The Abis link equipment is an optional customer-supplied module and acts as the front end to provide the Abis interface in service1 and service2 racks.

AC/DC system AC/DCVx No AC/DC rectifier used for AC power (can be equipped in the service1 rack).


Table 3 Main units and modules (overview) (Cont.)

DN0932873 21


Id:0900d805805712e3

DC and battery controller

M:DCBCTRLVx No Supervision of the AC/DC converter and of the con-nected battery systems (in service1 and service2 racks).

Battery BATTPACKVxBATTPACK_23Vx

No Up to 4 battery systems can be equipped in the service1 and service2 racks.

DCP DCP:R12-2BVx DCP:R12-2EVx

No The DC panel is used for distribution of -48 V DC, can be installed in base and extension racks.

ACTCACTPACTM

ACTC-yVxACTPVxACTMVx

No Alarm collection modules: • ACTC is equipped in each rack

(e.g. ACTC-3V1) • ACTM can be equipped in the base rack. • ACTP is equipped in each extension and service

rack

MSU AC MSU:AC3PHVxMSU:AC2PH/UVx

No Mains Supply Unit (AC)

MSU DC MSU:DCVxMSU:DC100AVx

No Mains Supply Unit (DC)

Fan FANVx No Fan units are mandatory for each rack.

Dust filter DUSTFILM-2Vx No Optional module for indoor, alternatively to MEF, for cleaning the cooling air.

Rack R:BS120-2Vx No One model for all rack types.

Frames F:ACOMVxF:RXCU12F:CORECUVxF:AC/DC1VxF:AC/DC2VxF:FANVxF:BATTERYVxF:BATTRAYVx F:BATTRAYBV3

No Each of the frames is necessary for installing the equipment.

Cover parts CP:20MMBFVxCP:AC/DCVx CP:ACOMVx CP:ACTCVx CP:COBA/COSAVx CP:CUVx CP:DIAMCOVx CP:MSUVx

No Cover parts close the unequipped slots to ensure the airflow inside the rack. Cover parts are absolutely mandatory to force air flow through modules plugged and avoid bypassing. For each slot a cover part is available.



22DN0932873


Id:0900d805805712e3

Module description

Mounting kits MK:AIRBUFFVx MK:BATTERYVx MK:BATTPACKVx MK:BATTUPVx MK:CAR12B/E/S1/S2Vx MK:CARSH-ISSVx MK:COREXTB/EVxMK:EMCRVx MK:EQ4BS120VxMK:FOCVxMK:HPDURVx MK:LEVx MK:LMURVxMK:OPEXALVx MK:RBB-S1B5MVxMK:TRAYVx

No There are some mounting kits for cabling and installa-tion inside and outside the racks, e.g. for: • air duct • rack cabling • earth quake equipment • inter site synchronization (ISS) • installation of battery tray 2nd generation

1) "Yes" indicates that the module has variants for different frequencies.



DN0932873 23


Id:0900d805805712e3

4.2 Core modules Core modules include COBA board, COSA board and COREXT board.

The core modules have the following tasks inside of the BTS: • local controlling of the entire BTS • generation of system clocks • providing of up to 8 Abis interfaces (PCM30/24) to BSC or other BTSs • providing of up to 24 CU interfaces • providing interfaces to internal and external alarms • providing an interface to the LMT/OMT • providing an interface for external clock synchronization • handling and processing of O&M messages

Core redundancy is supported (see Core redundancy).

Three types of core modules exist:1. COBA2P8, COSA6P162. COBA4P12, COSA4P12, COREXT3. CESCOBA (from BR10 onward)

A mix of COBA2P8/COSA6P16 with COBA4P12/COSA4P12/COREXT or with CESCOBA, e.g. COBA4P12 and COSA6P16, is not allowed. A mix of CESCOBA with COSA4P12/COREXT is possible for certain combinations. See Table 4 for the all possible configurations for CESCOBA with COSA4P12/COREXT.

In case of CESCOBA configuration, an ETHCON is always necessary.

Combination of core modules

Abis lines

CU inter-faces

Abis cross-

connect

CU slots 0…7 *

Base cabinet

CU slots 8…11 *

Base cabinet

CU slots 0…11 *

Ext. cabinet

Core redun-dancy

COBA2P8 2 8 yes

COBA2P8 + COSA6P16 8 24 yes yes yes yes

2 COBA2P8 2 8 yes yes

2 COBA2P8 + 2 COSA6P16 8 24 yes yes yes yes yes

COBA4P12 2 8 yes

COBA4P12 + COREXT 4 12 yes yes yes

COBA4P12 + COSA4P12 8 24 yes yes yes yes

2 COBA4P12 2 8 yes yes

2 COBA4P12 + 2 COREXT 4 12 yes yes yes yes

2 COBA4P12 + 2 COSA4P12 8 24 yes yes yes yes yes

CESCOBA 0 8 yes** yes

CESCOBA + COREXT 0 12 yes** yes yes

CESCOBA + COSA4P12 4 24 yes** yes yes yes

2 CESCOBA 0 8 yes** yes yes

2 CESCOBA + 2 COREXT 0 12 yes** yes yes yes

2 CESCOBA + 2 COSA4P12 4 24 yes** yes yes yes yes

Table 4 Core configurations

24DN0932873


Id:0900d805805712e3

Module description

Core boards have a common backplane. The connection of the core modules with the OVPT/Abis interface and the carrier units is done via cables, which are plugged into the backplane.

Figure 5 Connection of core modules

Hot plug-in: A hot plug-in of COBA and COSA is possible. This means, that these boards can be plugged in/out with voltage switched on without disturbing other HW inside the rack (no loss of data on other boards) and without destroying other boards.

After the plug-in of a core board, this board is in "reset" state and all bus drivers of external busses are in tristate. These drivers will be enabled not before initialization of the devices, which serve the external busses.

*) CU Slots supported by the core equipment

**) via IP connections only

Combination of core modules

Abis lines

CU inter-faces

Abis cross-

connect

CU slots 0…7 *

Base cabinet

CU slots 8…11 *

Base cabinet

CU slots 0…11 *

Ext. cabinet

Core redun-dancy

Table 4 Core configurations (Cont.)

OVPT CU

COBA COSA COBA red. COSA red. Abis

Abis Abis Abis Abis

CC-Link CC-Linkotherinterfaces

CUs

CC-Link CC-Link

CU

Base rack Extension rack

DN0932873 25


Id:0900d805805712e3

4.2.1 Core basis (COBA) The COBA is the central board of the core. The main components of this board are the base core controller, the advanced clock generation, the serial link interface controller that manage the external interface towards the carrier units, the PCM30/24 Abis inter-faces, the internal system alarm interface, and also an interface to one COSA to expand the BTS.

The COBA has to be installed in the base rack.

See Table 4 for all possible core configurations.

Types of COBA: • M:COBA2P8Vx • M:COBA4P12Vx • M:CESCOBAVx

g Name convention for COBAs and COSAs: The first digit gives the number of Abis interfaces, the following letter gives the kind of Abis interface (e.g. P for PCM30/24), and the following number gives the number of carrier unit interfaces (CC-links). For example:COBA2P8 means 2 PCM30/24 Abis interfaces and 8 carrier unit interfaces. COBA4P12 means 4 PCM30/24 Abis interfaces and 12 carrier unit interfaces.

The base core controller maintains the software of all BTS units in FLASH-EPROMs, monitors the software download, and terminates all internal system alarms. Beside the O&M functions, the controller handles the signaling messages between the core and the carrier units (CC-link).

The ACLK generates the system specific timing signals that are distributed by the CC-link to the carrier units.

The "cross connect" feature is supported. To provide this feature, additional core modules are required: • With COBA2P8: A COSA6P16 must be installed additionally. • With COBA4P12: Either a COSA4P12 or a COREXT must be installed additionally. • With CESCOBA: Either a COSA4P12 or a COREXT must be installed additionally.

The CESCOBA module (available from BR10 onward) is required if Circuit Emulation Service over Packet functionality shall be applied.

The CESCOBA is a COBA version for the BTSE family which is designed to carry TDM traffic (Abis) over a packet network without external equipment. TDM to Packet inter-working functionality is based on the Pseudo Wire emulation Edge-to-Edge mechanism (PWE3), which allows the transport of all relevant parts of a service, such as E1/T1 lines, over a packet switched network. This kind of emulation is called Circuit Emulation Service over Packet Switched Network (CESoPSN). For more information about CESoPSN functionality, see the feature description “FD10560: Internal Ethernet/IP interfaces for BSS”.

The CESCOBA must not be mixed with COBA4P12, COBA2P8 or COSA6P16.One (or two) CESCOBA module(s) can only be configured in combination with one Ethernet connector module (ETHCON).

Core redundancy is possible (see Core redundancy).

26DN0932873


Id:0900d805805712e3

Module description

Fault propagation through dependent modulesIf core redundancy is not installed and a failure in the COBA module occurs, the entire BTS goes out of service until the faulty COBA module is replaced.

If core redundancy is installed and a failure in the active COBA module occurs, all calls will be lost and the BTSE switches to the stand-by COBA without any further service interruption.

If the CESCOBA is configured and the ETHCON unit is faulty, the BTSE is out of oper-ation even if core redundancy is applied.

4.2.2 Core satellite (COSA) The main task of the COSA board is to increase the number of the PCM30/24 Abis inter-faces and CC-links of the COBA. A COSA in combination with a COBA make the "cross connect" functionality available.

The COSA is an optional module. It is located in the base rack.

The COSA is controlled by the COBA and receives the working-clock from the COBA.

The first 8 carrier units in the base rack are supported by the COBA. The COSA supports 4 additional carrier units in the base rack and 12 carrier units in the extension rack.

The COSA extends the configuration by up to 6 Abis ports. In the configuration with COBA and COSA, the BTS can support a maximum of 8 PCM lines and a maximum of 24 carrier units.

See Table 4 for all possible core configurations.

Types of COSA: • COSA6P16 COBA2P8 extension with 6 Abis links and 16 CC-links • COSA4P12 COBA4P12 extension with 4 Abis links and 12 CC-links

g For the naming convention see note at COBA description.

4.2.3 Core link extension (COREXT) The main task of the COREXT board is to increase the number of the PCM30/24 Abis interfaces and CC-links of the COBA. A COSA in combination with a COBA make the "cross connect" functionality available.

The COREXT board is an optional module and can be installed alternatively to a COSA board inside the COSA slot in the base rack.

The COREXT board connects 4 carrier unit ports and 2 Abis ports located at the COBA4P12 board via core backplane to the appropriate interfaces.

The COREXT is a passive board without a DC supply interface.

Type of COREXT: • COREXTV1: COBA4P12 extension with 2 Abis (PCM) links and 4 CC-links

DN0932873 27


Id:0900d805805712e3

Figure 6 Example of a configuration with COBA4P12 and COREXT

Figure 7 Example of a configuration with CESCOBA and COREXT

4.2.4 Core redundancyTo fulfill the core redundancy aspects, a redundant COBA can be installed. In case of a serious fault to the active COBA, the redundancy algorithm switches to the passive one without requiring operator interaction.

One of the COBAs is active and one is passive. The passive one is waiting for its acti-vation in case of a failure within the active core.

Both cores (#0 and #1) have link interfaces to the Abis lines, but only one (the active core) is connected. In case of a switchover, the link is automatically switched to the new

CU CU CUCU

COBA4P12

COREXT

CU CU

CU CU CU CU CU CU

2x Abis2x Abis

BA SE RAC K XL

C ESC OBAC OR EXT/

C OSA4P12

LMT/TPC

ACT

CAN

cu cu cu cu

cu cu cu cu

ANT ENN A COMB.

cu cu

cu cu

ETHC ON

ETH4 xAb is

28DN0932873


Id:0900d805805712e3

Module description

active COBA. After a redundancy switch occurs, an Abis alignment is performed in order to align the new active COBA with the BSC.

If the core consists of a combination of COBA and COSA or COBA and COREXT modules, each of these modules must be installed twice. Redundancy only covers the COBA boards. A failure of the COSA board does not initiate the redundancy switch.

Both, the active and the passive core have links to the carrier units. In reverse, each carrier unit is linked with both cores. The traffic data are transmitted transparently through the active core. Signal processing takes place only within the carrier units.

Automatic software updates on the passive COBA minimize the downtime in case of a redundancy switchover. Changes of the minimal configuration must be entered on the active and passive COBA separately and need the redundancy switch. Automatic syn-chronization of changed attributes/states via Abis alignment as well as simple object-modeling of the passive COBA takes place.

The redundancy interface is realized as a 2 Mbit/s HDLC link which provides a commu-nication interface between the two main microprocessors.

The ACLK of the active core is connected with the one on the passive core. It allows the passive ACLK to be synchronized to the active one.

Upgrade of the BTSE with Core redundancyA non-redundant BTSE can be extended with a redundant COBA performing a hardware and software upgrade. The BTSplus might require a new booter to provide redundant COBAs. After the creation and equipping of the second COBA, it will be the passive one and will be automatically aligned by the active COBA.

Initial installationInitial installation includes downloading and setting of the minimal configuration of the active COBA.

New BTSE software loadWhenever a new software version is downloaded via LMT or Abis, the passive COBA is synchronized with the same SW load after the new SW load has been activated. This guarantees that the new software version is always available. All changed attributes and states must again be aligned with the BSC during the database alignment.

Modification of HMO databaseThe BTSE database is modified via LMT and/or RC with one or more commands “cre-ate”, “set” or “delete”. The copy of the HMO database of active and passive COBA is automatically aligned.

Remote inventory dataAfter the download of new nob_RIU data via LMT, they are automatically copied to the passive COBA.

g With core redundancy, a mixed configuration with COBA2P8 and COBA4P12 in the same BTS is not allowed.

g Redundancy is implemented in a cold-standby mode, i.e., all calls will get lost if a core switchover occurs.

DN0932873 29


Id:0900d805805712e3

Fault propagation through dependent modules in case of core redundancyIf core redundancy is installed and a failure in the active COBA module occurs, all calls will be lost and the BSTE switches to the stand-by COBA without any further service interruption. This recovery action is reported within the alarm report.

An active COBA breakdown triggers an automatic restart performed on the passive COBA (flip-flog logic). Interruption time is kept to a minimum since the configuration data and software are already mirrored on the passive COBA. The recovery time is short, depending on the number of TRXs involved.

In general, the operator is informed about any alignment failures via new alarms. The active COBA is not impacted due to failures caused by the passive COBA.

After a redundancy switch, the COBA that became active, must perform a “warm reset” in order to initialize the SELIC.

g The direction of the alignment is also determined by the faster startup of one COBA. If a COBA containing consistent data is moved from one BTSE to another, an align-ment in the wrong direction is possible. It is the responsibility of the operator to ensure that the flash EPROM must be formatted and the board shall be equipped/created after the desired active COBA is in normal operation.

If the CESCOBA is configured and the ETHCON unit is faulty, the BTSE is out of oper-ation even if core redundancy is applied. The power supply for ETHCON is redundant in case of redundant CESCOBA units.

30DN0932873


Id:0900d805805712e3

Module description

4.3 Carrier related modules The carrier unit takes care of all carrier oriented tasks. In the uplink (UL) direction, two or four RF signals (diversity) are received and finally converted into TRAU frames and signaling data. In the downlink (DL) direction, TRAU frames and signaling data are received from the core and converted into a GMSK or 8PSK modulated RF signal, which is amplified to the desired power level.

Different types of carrier related modules can be used: carrier units (CUs and GCUs), EDGE carrier units (ECUs) and flexible carrier units (FlexCUs). Each carrier unit can be replaced by another without any additional hardware change.

• An ECU is similar to a GCU but with the additional support of 8PSK modulation. It converts the signaling and traffic data into a GMSK or 8PSK modulated signal.

• A FlexCU is a complete two-carrier unit and its two TRXs can be configured inde-pendently, e.g. into different sectors; GMSK and 8PSK modulated signals are sup-ported.

CU, GCU, ECU and FlexCU modules may be installed in any kind of mixed configura-tions.

For the typical and the guaranteed values of RF output power level, see section Carrier unit output power level.

4.3.1 Carrier units (CU) The CU is a carrier unit variant which supports GMSK modulation. Different variants of CUs for the several frequency bands GSM 900, GSM 1800, and GSM 1900 exist (see also Table 5).

4.3.2 GSM carrier unit (GCU) The GCU is a carrier unit variant that supports GMSK modulation.

Different variants of GCUs for the frequency bands GSM 900 and GSM 1800 exist (see also Table 5) .

4.3.3 EDGE carrier unit (ECU) The ECU can support EDGE functionality in uplink and downlink. In downlink direction, the signaling and traffic data are received from the core and converted into GMSK or 8PSK modulated signals which are amplified to the desired power level. With the intro-duction of EDGE it is possible to mix EDGE and non-EDGE timeslots on the same carrier.

Different variants of ECUs for the several frequency bands GSM 850, GSM 900, GSM 1800, and GSM 1900 exist (see also Table 5).

The mechanical design of ECU is identical to that of all other CU versions; it is therefore hardware compatible and fits into all BTS racks.

DN0932873 31


Id:0900d805805712e3

4.3.4 Flexible carrier unit (FlexCU) The FlexCU is a complete two-carrier unit. It is based on the ECU keeping the same dimensions. Its two TRXs can be configured independently, e.g. into different sectors, and can therefore increase the system reliability. The FlexCU either acts as two independent ECUs or as one carrier unit with four receiv-ers, the so called "fourfold receive diversity" mode. To improve the downlink in fourfold receive diversity mode, it is recommended to activate the feature "Transmission Diver-sity Time Delay".

In uplink direction, four RF signals are received and converted into traffic and signaling data. In downlink direction, traffic and signaling data are received and converted into two GMSK or 8PSK modulated signals which are amplified to the desired power level.

By using FlexCUs instead of other carrier units, the number of carriers within the existing rack(s) can be doubled. This is an ideal solution to double the capacity of BTSs, an advantage not only for footprint restricted BTS sites.

A working FlexCU requires about 30% less power than two ECUs. As soon as a TRX is idle, the transmitter (TX) is switched off. With this enhanced power saving mode, the overall power consumption of an idle FlexCU (both TRXs in idle state) is only about 40 W.

The FlexCU supports all frequency bands: GSM 850, GSM 900, GSM 1800, and GSM 1900. One type for each frequency band exists (see also Table 5).

FlexCU operation modes FlexCUs may operate in two different modes: the double and the single TRX mode.

The double TRX mode is the default configuration of a FlexCU, with full support of MCS-1 to MCS-9 in uplink and downlink. It functions like two independent ECUs with complete twofold EDGE TRX functionality: Each of both transceivers shows a full-equipped main receiver and diversity receiver.

Figure 8 FlexCU – Double TRX mode

The so called fourfold receive diversity mode is the single TRX mode in which the FlexCU functions as one carrier unit with four receivers. If transmit diversity is enabled, this mode is automatically activated.

The four receivers of the FlexCU are fed by four independent antennas via e.g. one (F)DUAMCO together with one DIAMCO or two (F)DUAMCOs.

The TX path is fed via the (F)DUAMCO to two of the four antennas.

The fourfold receive diversity mode enhances the receiver sensitivity of the BTS. The doubled number of the RX paths leads to an enhanced diversity gain.

TX0

TX1

RX-N0RX-Div0

RX-N1RX-Div1

SignalProcessing

Combiner(s) TX0

TX1

RX-a

TX0RX-b

RX-cRX-dRX-d

RX-bRX-b

32DN0932873


Id:0900d805805712e3

Module description

Figure 9 FlexCU – Single TRX mode – Fourfold receive diversity mode

4.3.5 Carrier unit output power level The typical and the guaranteed values of RF output power level per TRX are listed below for CUs, GCUs, ECUs and FlexCUs, depending on its frequency bands and mod-ulation types (GMSK and 8PSK). The values in "Watt" are rounded.

g For the U.S. market, you can find the power reduction of the carrier units for 850 MHz and 1900 MHz in chapter FCC Issues.

TX0

TX0

RX-NRX-Div0

RX-Div1RX-Div2

SignalProcessing

Combiner(s) TX0

TX1

RX-a

TX0RX-b

RX-cRX-dRX-d

RX-bRX-b

Frequency band

Carrier unittype

TypicalRF output power

GuaranteedRF output power

GMSK 8PSK GMSK 8PSK

dBm Watt dBm Watt dBm Watt dBm Watt

CU/GCU GSM 900 CUGV3 / V4 47.3 54 -- -- 47.0 50 -- --

GCUGV2 47.3 54 -- -- 47.0 50 -- --

GSM 1800 CUDV3 / V4 45.7 37 -- -- 45.4 35 -- --

GCUDV2 47.3 54 -- -- 47.0 50 -- --

GSM 1900 CUPV4 45.7 37 -- -- 45.4 35 -- --

ECU GSM 850 ECU850HPV2 48.3 68 46.3 43 48.0 63 46.0 40

ECU850V3 / V3A 48.3 68 46.3 43 48.0 63 46.0 40

GSM 900 ECUGV3 / V3A 48.3 68 46.3 43 48.0 63 46.0 40

GSM 1800 ECUDV2 47.3 54 45.3 34 47.0 50 45.0 32

ECUDHPV3 / V3A 48.3 68 45.3 34 48.0 63 45.0 32

GSM 1900 ECUPV2 47.3 54 45.3 34 47.0 50 45.0 32

ECUPHPV2 48.3 68 45.3 34 48.0 63 45.0 32

ECUPHPV3 / V3A 48.3 68 45.3 34 48.0 63 45.0 32

FlexCU GSM 850 FCU850V1 47.0 50 44.0 25 46.7 47 43.7 23

GSM 900 FCUGV1 47.0 50 44.0 25 46.7 47 43.7 23

GSM 1800 FCUDV1 47.0 50 44.0 25 46.7 47 43.7 23

GSM 1900 FCUPV1 47.0 50 44.0 25 46.7 47 43.7 23

Table 5 Carrier unit output power level (typical and guaranteed values)

DN0932873 33


Id:0900d805805712e3

4.4 Antenna combining modules Various types of combining modules are available. Each type comes in various modules and is associated with various frequency bands.

The BTS can work with three different amplifier multicouplers: with the DUAMCO, its successor FDUAMCO, or the MFDUAMCO, which offers the most flexible way to combine.

The filter combiner FICOM6 offers the same advantages like MFDUAMCO but with lower insertion loss for a high number of TRXs per cell.

4.4.1 Duplexer amplifier multicoupler (DUAMCO) The DUAMCO consists of two identical modules. Each of the DUAMCO modules combines the transmit and receive paths to one antenna. It splits the receive signal to be used in the carrier units and serves as a duplexer unit, which provides filtering func-tions for both, RX and TX paths and low noise amplification for the RX path.

Different versions of DUAMCO are available for each frequency band.

Different DUAMCO versions provide different functionality: • a DUAMCO 2:2 module connects one carrier to one antenna • a DUAMCO 4:2 module connects up to two carriers to one antenna • a DUAMCO 8:2 module connects up to four carriers to one antenna

g It is possible to implement DUAMCO/FDUAMCO modules of different frequency bands, but: All combining equipment in a cell must support the same frequency range (that means either GSM 850, or GSM 900, or GSM 1800, or GSM 1900).

g Use FDUAMCORE modules for the GSM-RE 900 MHz band.

It is possible to install up to four DUAMCO 2:2 or DUAMCO 4:2 and up to two DUAMCO 8:2, respectively in one rack.

g DUAMCOs of different versions have a different TX attenuation.

The DUAMCO is equipped with complete TMA interfaces for DC supply and signaling. For more informatio, see Antenna Combining - FDUAMCO/DUAMCO.

Fault propagation through dependent modules Each amplifier of the DUAMCO RX path (LNA) consists of two parallel branches. If only one branch of one amplifier has a failure, the amplifier will reach lower sensitivity and generates a warning. The operation continues with performance degradation.

If more than one branch of the whole amplifier chain is faulty, the corresponding path of the receiver will not be ready for operation. The connected carrier units lose one of their RX paths (normal or diversity path). The operation continues without diversity feature.If a carrier unit loses both RX paths, it will be configured out of operation.

34DN0932873


Id:0900d805805712e3

Module description

4.4.2 Flexible duplexer amplifier multicoupler (FDUAMCO) The FDUAMCO is the successor of the DUAMCO. It consists of two identical modules, which each combine the transmit and receive paths to one antenna.

Each FDUAMCO module may be operated in one of the following modes (by jumper set-tings): • 2:2 mode: 1 carrier is fed to the antenna port • 4:2 mode: 2 carriers are combined and fed to the antenna port

Within each cell/sector the same mode of the FDUAMCO shall be installed.

All RX and RXCA outputs of FDUAMCO which are not connected to RX input of a carrier unit, shall be terminated with 50 Ω load resistor. The termination is not required if an FDUAMCO module is not used in the cell configurations.

The FDUAMCO can be combined with a COAMCO8 module to support more carrier units.

The FDUAMCO is equipped with complete TMA interfaces for DC supply and signaling. For more information, see Antenna Combining - FDUAMCO/DUAMCO.

4.4.3 MFDUAMCOThe MFDUAMCO is the successor of DUAMCO and FDUAMCO. It consists of two iden-tical modules, which each combines the transmit and receive paths to one antenna, and a single remote electrical tilt (RET) for controlling the antenna tilt.

Each MFDUAMCO module may be operated in one of the following modes (by jumper settings): • 2:2 mode: 1 carrier is fed to the antenna port • 4:2 mode: 2 carriers are combined and fed to the antenna port

Within each cell/sector, the same mode of the MFDUAMCO shall be installed.

All RX and RXCA outputs of MFDUAMCO which are not connected to RX input of a carrier unit, shall be terminated with 50 Ω load resistor. The termination is not required if an MFDUAMCO module is not used in the cell configurations.

The MFDUAMCO can be combined with a HYBRID4 module and a COAMCO8 module to support more carrier units.

The MFDUAMCO is equipped with complete MHA/TMA interfaces for DC supply and signaling. For more information, see Antenna combining - MFDUAMCO.

4.4.4 Co-amplifier multicoupler (COAMCO8) The COAMCO8 consists of two identical modules.

The COAMCO8 is used in combination with:

• FDUAMCO in 4:2 mode to provide an 8:2 configuration, so four carriers are combined and fed to the antenna port.

• MFDUAMCO-HYBRID4 configuration to provide an 8:2 configuration.

COAMCO8 modules are available for GSM 850/900 MHz or GSM 1800/1900 MHz.

For more information, see Antenna Combining - COAMCO8.

DN0932873 35


Id:0900d805805712e3

4.4.5 Hybrid extension module for MFDUAMCO (HYBRID4) The HYBRID4 is an optional module in combination with an MFDUAMCO to provide a 4:2 configuration or – with an additional COAMCO8 – an 8:2 configuration.

If used, it must be installed in the same ACOM slot as the related MFDUAMCO, because it is fastened to the MFDUAMCO by screws at the front panel.

The HYBRID4 unit consists of two identical modules. Each of these modules provides two RF input ports and one RF output port to combine the TX paths from several carrier units to one connector.

HYBRID4 modules are available for GSM 850/900 MHz or GSM 1800/1900 MHz.

g HYBRID4 and MFDUAMCO units of different manufacturers can be mixed.

For more information, see Antenna Combining - MFDUAMCO-HYBRID4 Configuration.

4.4.6 Dual Integrated Amplifier Multicoupler (DIAMCO) The DIAMCO is an optional module for antenna multicoupling and is required for the RX signal path in FICOM configurations and special DUAMCO configurations.

A DIAMCO module is used to split the RX antenna signal into several receiver inputs.

The DIAMCO is equipped with complete TMA interfaces for DC supply and signaling.

For more information, see Antenna Combining - DIAMCO.

Fault propagation through dependent modules Each amplifier of the DIAMCO RX path (LNA) consists of two parallel branches. If only one branch of one amplifier has a failure, the amplifier will reach lower sensitivity and generates a warning. The operation continues with performance degradation.

If more than one branch of the whole amplifier chain is faulty, the corresponding path of the receiver will not be ready for operation. The connected carrier units lose one of their RX paths (normal or diversity path). The operation continues without diversity feature. If a carrier unit loses both RX paths, it will be configured out of operation.

36DN0932873


Id:0900d805805712e3

Module description

4.4.7 Mast head amplifier / tower mounted amplifier (MHA/TMA) MHA and TMA are optional modules that connect the antenna with the BTS in order to amplify the receive signal.

The configuration with MHA or TMA is advantageous because the system sensitivity will not be degraded by feeder cable loss.

The MHA is feasible only with MFDUAMCO from BR9 onward or with the FICOM6 from BR10 onward. MHA are not applicable for GSM-R BTS.

One MHA is needed for two RX paths, i.e. for one MFDUAMCO/FICOM6.

One single TMA (STMA) is needed for each RX path of (F)DUAMCO/DIAMCO. One dual TMA (DTMA) is needed for two RX paths of (F)DUAMCO/DIAMCO.

Different types of MHA exist for different frequency bands: • MDTA (850 MHz) • MDGA (E-GSM, 900 MHz) • MDDA (1800 MHz) • MDPA (1900 MHz)

The MDxA units replace the TMA units without change of functionality.

See Table 6 for possible substitutions if existing TMAs are replaced by MDxA.

Two kinds of TMA exist: The "single TMA" (GSM 850, GSM 900) and the "dual TMA" (GSM 1800, GSM 1900).

g If the TMA is used together with a HPDU, a BIAS-T (DUBIAS) for powering and sig-naling of the TMA is required.

The MFDUAMCO / FICOM6, if set to MHA/TMA mode (dip switch 1 and 6 are ON, or equivalent O&M configuration setting), automatically detects the connected type of MHA /TMA (legacy S/DTMA or MDxA) and then initiates the correct operating mode of MDxA after power-up.

The O&M functionality with respect to TMA/MHA is unchanged with previous and current BR SW releases (up to BR10).

For more information, see Antenna combining - MHA/TMA.

MHA: Fault propagation through dependent modules The MHA is monitored via AISG protocol. The connected MFDUAMCO/FICOM6 gener-ates an alarm to O&M in case of malfunction. LEDs on the front panel of the MFDUAMCO/FICOM6 show the state of each MHA. Each green LED indicates that the DC for the MHA is "OK" and each red LED gives notice of a faulty MHA if the BTS is configured for MHA.

previous TMA MHA

STMA E-GSM MDGA

STMA 850 MDTA

DTMA DCS MDDA

DTMA PCS MDPA

Table 6 Possible TMA substitutions with MHA

DN0932873 37


Id:0900d805805712e3

If a branch fails, the amplifier will be bypassed by the "Fail save switch". The connected MFDUAMCO/FICOM6 generates an alarm message towards the O&M. The red LED in the MFDUAMCO/FICOM6 of the concerned MHA is switched on, and the multicoupler device will be switched into AMCO mode automatically. The operation continues with minor performance degradation.

If an MHA is installed, the MFDUAMCO/FICOM6 works in MUCO mode and only the second amplifier of the RX chain is active. If the MHA fails, "Fail save compensation" will take effect. The MHA connects the antenna directly to the MFDUAMCO/FICOM6, receives a message to switch over into AMCO mode. In AMCO mode, both amplifiers become active and the attenuation switches off. The connected carrier units continue their operation with minor performance degradation. Only a POWER ON/RESET or a software reset can terminate the state of "Fail save compensation".

TMA: Fault propagation through dependent modules The TMA watches its LNA by monitoring the DC current and generates an alarm message towards (F)DUAMCO/DIAMCO. The connected (F)DUAMCO/DIAMCO gen-erates an alarm to O&M in case of malfunction. LEDs on the front panel of the (F)DUAMCO/DIAMCO show the state of each TMA. Each green LED indicates that the DC for the TMA is "OK" and each red LED gives notice of a faulty TMA if the BTS is con-figured for TMA.

The LNA consists of two parallel branches. If only one branch has a failure, the amplifier reaches lower gain and the connected (F)DUAMCO/DIAMCO will generate a warning towards the O&M. Operation continues with performance degradation.

If both branches fail, the amplifier will be bypassed by the "Fail save switch". The con-nected (F)DUAMCO/DIAMCO generates an alarm message towards the O&M. The red LED in the (F)DUAMCO/DIAMCO of the concerned TMA is switched on, and the multi-coupler device will be switched into AMCO mode automatically. The operation contin-ues with minor performance degradation.

If a TMA is installed, the (F)DUAMCO/DIAMCO works in MUCO mode and only the second amplifier of the RX chain is active. If both branches of the TMA fail, "Fail save compensation" will take effect. The TMA connects the antenna directly to the (F)DUAMCO/DIAMCO, receives a message to switch over into AMCO mode. In AMCO mode, both amplifiers become active and the attenuation switches off. The connected carrier units continue their operation with minor performance degradation. Only a POWER ON/RESET or a software reset can terminate the state of "Fail save compen-sation".

38DN0932873


Id:0900d805805712e3

Module description

4.4.8 Filter combiner with six TNFs (FICOM6) g The FICOM6 module is available for a BTS from BR10 onward.

Full O&M support includes e.g.:

• Unrestricted, independent mapping and coordination by LMT/RC

• Standard double antenna configuration with up to 12 TRXs connected to 2 FICOM6 modules in one rack

• Possibility of mixed operation between FICOM and FICOM6 in one rack

• Support of 3rd party low gain TMAs

• Support of MHAsThe FICOM6 is the successor of FICOM (base and expansion) modules. It is an antenna combiner with integrated RX amplifier and RX multicoupler function. The RX amplifiers are realized as low noise amplifiers (LNA). One FICOM6 module joins the functionality of one FICOM base module, two FICOM expansion modules, one DIAMCO, one HPDU and one DUBIAS.

With one FICOM6 module it is possible to combine up to 6 TRXs per antenna. With a standard double antenna and BR10 up to 12 TRXs are configurable.

The FICOM6 provides the same functionality like an MFDUAMCO module but with dif-ferent TX combining: All TRXs are combined with tunable narrowband filters (TNFs) to a single antenna. For high numbers of TRXs per cell, this combiner technique provides lower insertion loss than wideband combining (see table below). An extra advantage of the FICOM6 is its high capacity in combination with high TX power.

In each base or extension rack, up to 2 FICOM6 modules can be installed.

The FICOM6 module can be implemented for two different frequency bands: R-GSM 900 and GSM 1800.

The FICOM6 supports 3rd party TMA units in current window mode, no legacy TMA units.

Restriction for combiner usage

• Synthesizer frequency hopping is not supported.

For more information, see Antenna Combining - FICOM6.

TRXs per cell

Typical insertion loss (dB) 1)

1) Values exemplary for 6 TRXs at 600 kHz within 80% bandwidth.

TX power improvement with FICOM6 (dB)FICOM6 FDUAMCO

1 - 2 3 *) 1.1 -1.9

3 - 4 3 *) 4.3 1.3

5 - 8 3 *) 7.8 4.8

9 - 12 3 *) n.a. ---*) preliminary values without guarantee

Table 7 FICOM6 and FDUAMCO: Insertion losses – comparison

DN0932873 39


Id:0900d805805712e3

4.4.9 Filter combiner (FICOM) g The application of a FICOM modules is possible in a BTS BS-240XL, but not useful.

A BS-240XL rack provides four ACOM slots. If four FICOM modules are mounted, only 8 carriers can be combined. For the remaining four carriers, no other antenna combiner is available inside the rack and, therefore, TX combining beyond rack borders is necessary. For this reason, also the HPDU and DUBIAS modules need not be considered in the configuration of a BS-240XL system.

With a FICOM, it is possible to combine up to 8 TX signals in the downlink direction (TX) in one rack. For the uplink direction (RX), the DIAMCO has to be used to filter and dis-tribute the received signals to the carrier units. A big advantage of the FICOM is the very low insertion loss.

The FICOMs are implemented for two different frequency bands: R-GSM 900 and GSM 1800.

For more information, see Antenna Combining - FICOM.

4.4.10 High power duplexer (HPDU) g The application of FICOM and HPDU modules is possible, but not useful (see note

at FICOM description).

The HPDU combines the TX path and the RX path to one antenna, in order to minimize the number of antennas when FICOM is used. The HPDU contains a duplex filter for the transmit frequency band and for the receive frequency band, but no low noise amplifier in the RX path.

The HPDUs are implemented for three different frequency bands: P-GSM 900, GSM-PS 900, and GSM 1800.

Up to two HPDU can be integrated on top of the rack below the cover and up to two HPDU could fit in the gap between the inner side wall and the frame in the rack.

g If the TMA is not a low-gain TMA and is used together with a HPDU, a BIAS-T (DUBIAS) for powering and signaling of the TMA is required.

For more information, see Antenna Combining - HPDU.

40DN0932873


Id:0900d805805712e3

Module description

4.5 Power supply modules

4.5.1 AC/DC system An AC/DC system is required if the BTS is supplied by AC mains. The AC/DC module converts the AC mains voltage (nominal AC input voltage: 230 V) into the -48 V DC supply voltage.

The AC/DC system consists of one or two frames housed in the service1 rack.

A frame contains: • up to 6 AC/DC modules ("n+1" for optional redundancy) • one controller board DCBCTRL for battery supervision, AC/DC supervision, alarm

interface • frame with AC distribution, DC Distribution, signal distribution between AC/DCs and

controller board via backplane

Above the AC/DC system, two fans are installed in order to force the cooling airflow through the AC/DC modules.

The tasks of an AC/DC module are the supply of all -48 V consumers within the BTS and the generating of alarms in case of AC mains or module failures.

The AC/DC system tasks are in detail: • output supplying all -48 V-consumers within the BTS; input supplying of

230 V AC single-phase or 3-phase-distribution for the world market and 120/208 V AC 3-phase-distribution (208 V phase to phase) for the U.S. market.

• supplying external equipment with -48 V • charging and supervising of different backup battery types • supervising AC/DCs, batteries and alarm messaging • switching off DC outputs (AC/DCs as well as battery) in case of under and over tem-

perature • hot plug-in/out of AC/DC modules

The AC/DC and the backup batteries work as an uninterruptible power supply system (UPS).

AC/DC modules work in load sharing "n+1", but n AC/DC are able to supply the whole BTS (redundancy concept).

The nominal DC output power of one AC/DC module is 720 W.

4.5.2 Backup battery (BATTPACK) The backup battery guarantees continuous operation for a certain time in case of main breakdown or AC/DC failure.

The battery backup time depends on the configuration and the battery type. Different battery types for each BTS type are available.

Backup batteries can be installed in the service racks only.

The number of batteries needed depends on the configuration of the BTSplus and the expected backup time. If the backup battery fails, operation continues as long as the AC/DC modules provide the power.

All battery systems connected to one AC/DC system should have the same capacity.

DN0932873 41


Id:0900d805805712e3

The capacity of the backup battery can be increased by additional batteries in separate service2 racks.

Emergency operation The backup time of each BTS can be increased by using the "Emergency operation" feature. To hold the BTS in operation mode for an extended time, it is necessary to switch over to "Emergency configuration" after a user-defined time. In this mode, none or only operator defined TRX remain in operation. All TRXs, which are not part of the emergency configuration, are switched off.

The core modules and optional transmission equipment are supplied with DC voltage until low voltage detection circuit (LVD relay) disconnects the backup battery from system load.

If enabled, a second timer counts for another user-defined time. With its expiration, all modules are switched off, except the core modules. This means "Zero configuration".

4.5.3 DC mains supply unit (MSU:DC) The MSU is located at the EMI panel.

The MSU:DC provides the lightning protection (optional feature), the EMI filter, and the terminal clamps for the external DC cable (-48 V, 0 V).

The lightning protection element indicates fault conditions on an alarm output (LPA) which is linked to the ACTC module. The upgrade kit for lightning protection comprises the OVP element, the upgrade cable kit, and the LPA connection cable.

One MSU:DC with lightning protection included has to be installed in each rack (base/extension/service2). In the base and extension racks, a MSU:DC 100 A is required, in service2 racks a MSU:DC 50 A.

g A mix of MSU:AC and MSU:DC in one BTS is not permitted.

4.5.4 AC mains supply unit (MSU:AC) The MSU:AC contains the EMI filter, the connection terminals and – optional – the light-ning protection elements.

For AC power supply, a 3-phase MSU:AC (with or without lightning protection) or one 2-phase MSU:AC in the U.S. version has to be installed once in the service1 rack. In all other racks, the cover part CP:MSU has to be installed.

g A mix of MSU:AC and MSU:DC in one BTS is not permitted.

42DN0932873


Id:0900d805805712e3

Module description

4.5.5 DC and battery controller (DCBCTRL) The DCBCTRL supervises the AC/DC modules and the DC outputs of the AC/DC system. It indicates the status of the power supply system with LEDs.

One or two power supply sub-racks can be installed in a service1 rack, each with its own DCBCTRL.

In detail, it performs the following functions: • Supply of all -48 V consumers with DC power • Load On / Off • Battery On / Off • Charging of battery backup system • Monitoring of battery current • Monitoring of load voltage range and battery voltage range • Monitoring of rack and battery temperature ranges and switching off the DC power

in case of over- or under-temperature • Interface for alarm signals (external/internal) • DIP switch for selecting the AC/DC sub-rack address and the battery capacities of

the connected battery system • CAN bus system interface

4.5.6 DC panel (DCP) The DCP is used for distribution of the -48 V supply voltage to the modules and inte-grates the DC breakers to protect the DC power lines.

Different DC breakers are available for the carrier units, the core modules, the combin-ers, the LE, the fans, and the ACTP. The DC panel contains also the ACTC module.

In addition, two connectors (LMT and Ethernet connector) are integrated into the front cover of the DC panel. These connectors are linked to the COBA module.

4.5.7 Alarm collection terminal boards (ACTC, ACTP, ACTM) The ACTC is installed once in each rack (part of the DC-Panel) to collect all internal alarms. In the base rack , the ACTC is directly connected to the COBA. In all other racks, the ACTC is connected to the ACTP. In each extension and service rack, an ACTP module has to be installed.

The ACTC has inputs for 16 discrete alarm lines: rack door alarm, fan alarms, temper-ature alarms and internal cabinet alarms, which can be defined by the operator.

The ACTC board provides connectors (4 pins) for DC supply (-48 V) and alarm interface to: • Fan units • DC for additional equipment

The ACTC board also provides connectors (2 pins) for alarm interface to: • Rack door open sensor (RDO) • Lightning protection alarm (LPA/OVP)

For rack alarms, a 24-Pin terminal clamp is used.

On customer request, an ACTM module can be installed in the base rack. In addition to the 16 internal rack alarms collected with ACTC, 48 inputs are available with ACTM,

DN0932873 43


Id:0900d805805712e3

which can be freely used for external alarms. To protect the signal lines of the ACTM against overvoltage, an EAP unit (for all lines) or OPEXAL modules (for up to 10 lines each) are available.

The need of EAP or OPEXAL depends on the following situations:

• If all signal lines connected to the ACTM are less than 30 meters long and are kept within the building, no additional overvoltage protection is needed.

• If any signal line connected to the ACTM is more than 30 meters long with all signal lines still kept within the building, the EAP unit must be used for all external alarm lines.

• If at least one of the external alarm lines is leaving the building, each external alarm line must be protected by its own OPEXAL module.

• Any signal line connected to the ACTM of a outdoor base shelter version must be protected by its own OPEXAL module.

g The ACTM is mandatory if more than seven external site alarms are required.

Fault propagation through dependent modules If the ACTC, ACTP or ACTM fails during operation, the BTS continues the operation.

44DN0932873


Id:0900d805805712e3

Module description

4.6 Abis interface modules

4.6.1 Overvoltage protection and tracer (OVPT) The OVPT is an optional module. An ABISCON module can be installed as an alterna-tive.

But, the installation of an OVPT module becomes mandatory if the connection point for the Abis line (e.g. Network Termination for PCM30 or Microwave equipment) is outside of the building which is housing the BTS.

The OVPT is responsible for protection of the PCM24/PCM30 ports of the Abis interface and the external synchronization clock input of the BTS against overvoltage. Additionally the OVPT provides interfaces to connect PCM tracers without interruption for monitoring the Abis lines and an input interface for external synchronization sources. The OVPT is located outside the EMI shield to terminate possible overvoltages before they enter the EMI protected area inside of the rack.

The board performs the following tasks: • lightning protection of PCM lines • lightning protection of the external synchronization clock • provision to connect external monitoring equipment without interruption; The lines

are decoupled to prevent distortions. • support of 75 Ω coax or 100 Ω /120 Ω balanced lines

g – Up to 2 PCM lines are supported with COBA2P8 module. – Up to 4 PCM lines are supported with COBA4P12 and COREXT module. – Up to 8 PCM lines are supported with COBA2P8 plus COSA6P16 installed or

COBA4P12 plus COSA4P12. If more than 4 PCM lines are required, a second OVPT needs to be installed.

Figure 10 ABISCON and OVPT (100/120 Ω )

monitoring interfaces

OVPTABISCON

uplink linesdownlink linesterminals for external PCM cables

DN0932873 45


Id:0900d805805712e3

4.6.2 Abis connection (ABISCON) The ABISCON is an optional module. An OVPT module is available as an alternative to the ABISCON.

The Abis connection module provides the interface between the rack and the peripheral Abis cables. The Abis connection module also provides the feature for monitoring the Abis lines and an input interface for external synchronization sources. The module is located outside the EMI shielding.

The board performs the following tasks: • support of 75 Ω coax or 100 Ω /120 Ω balanced lines • provision to connect external monitoring equipment without interruption; The lines

are decoupled in order to prevent distortions.

For an appearance of an ABISCON see Figure 10.

g – Up to 2 PCM lines are supported with COBA2P8 module. – Up to 4 PCM lines are supported with COBA4P12 and COREXT module. – Up to 8 PCM lines are supported with COBA2P8 plus COSA6P16 installed or

COBA4P12 plus COSA4P12. If more than 4 PCM lines are required, a second ABISCON needs to be installed.

4.6.3 Ethernet connector module (ETHCON)The ETHCON unit is mandatory in combination with one or two CESCOBA(s), which is necessary for Circuit Emulation Service over Packet Switched Network (CESoPSN) functionality. This feature allows carrying TDM traffic over a packet network without external equipment. TDM to packet interworking functionality is based on the Pseudo Wire emulation Edge-to-Edge mechanism (PWE3), which allows the transport of all relevant parts of a service, such as E1/T1 lines over a packed switched network. For more information about CESoPSN functionality, see the feature description “FD10560: Internal Ethernet/IP interfaces for BSS”.

The ETHCON replaces the ABISCON or OVPT board (Abis interface 0...3).

CESCOBA and ETHCON are available from BR10 onward.

It performs the following tasks:

• Provision of two 100Base-TX electrical Ethernet interfaces, e.g. to BSC or to another BTS, one internal 100Base-Tx interface to the active CESCOBA, and two 100Base-TX electrical Ethernet trace ports

• Provision of two SFP slots for support of optical Ethernet ports (100Base-FX, 1000Base-LX, or 1000Base-SX)

• Over voltage protection of the external clock synchronization inputs

• Provision of remote inventory data

The ETHCON must be installed in PCM0 slot only (top of base rack, or plinth of base shelter). The mounting kit MK:ETHCONSHV1 is required for installation of ETHCON unit into plinth of BTSplus shelter, the MK: EAPB-BOXRV1 is required for installation of ETHCON unit together with HPDU unit on top of BS-240XL base rack (relevant for XL rack variant with MUCO slots only).

46DN0932873


Id:0900d805805712e3

Module description

ETHCON provides the following interfaces:

– Fast Ethernet interfaces on Port 0 and Port 1The interfaces are specified for indoor use and contain over voltage protection.

– 100 Mbit/s or 1Gbit/s on SFP Port 2 and Port 3

– Interface for synchronization with an external clock (connector block 1 to 6)– input of balanced signal, or unbalanced signal ()– monitor output for external clock

Figure 11 shows an example of a configuration of a CESCOBA with ETHCON and COSA4P12.

Figure 11 Example of a configuration of a CESCOBA with ETHCON and COSA4P12

Redundancy aspectsOnly one ETHCON unit can be installed into a base cabinet. Therefore, all BTS con-nected to the ETHCON will lose their connection to the BSC if the ETHCON unit is defective, despite of possible core redundancy. The power supply for ETHCON is redundant in case of redundant CESCOBA units.

Power consumptionThe ETHCON unit has a maximal DC power consumption of about 8 W with two SFP modules and about 1 W with one SFP module installed.

BA SERAC K XLEXTENS ION RAC K XL

cu cu cu cu

ANT ENN A COMB.

cu

cu cu

cu cu cu cu cu

C ES C OBAC OSA4P12

LMT/TPC

CAN

cu cu cu cu

cu cu cu cu

ANT ENN A COMB.

cu cu

cu cu

ETHC ON

ETH

ACT

4 xAb is

ACT

DN0932873 47


Id:0900d805805712e3

4.7 Abis link equipment (LE) The LE is an optional module and provides physical terminations for the Abis interface. It can be provided as an optional module or by the customer. Different equipment can be used for wire, radio, or optical transmission depending on customer requirements. If radio transmission is required, microwave equipment can be used. Direct connections of the PMC30/24 links are also possible.

If there is no other connection between the BTS and the BSC or other BTS, the LE can be installed inside the BTS.

For connection of LE to external interfaces (Abis links), there are cable entries available.

The number of LE that can be installed depends on the height of each LE.

4.8 Dust filter (DUSTFILM) A dust filter is installed in the indoor variant of the BTS. The dust filter is an air filter and protects the BTS against dust particles.

4.9 Fan unit The fan unit produces a sufficient airflow to cool the installed modules.

In order to keep both, the acoustic noise and the power consumption of all fans at the lowest level possible, the fan speed is temperature controlled via an integrated (internal) sensor.

Furthermore, each fan delivers a "Fan failure" signal which is collected by the ACTC. In the base rack the signal is processed by the COBA, in extension and service racks by the ACTP.

Mandatory fan units 8 fan units must be installed into each: • BS-240XL base rack • BS-240XL extension rack

2 fan units must be installed into each: • BS-240XL service1 rack • BS-240XL service2 rack

Optional fan units Two additional fan units shall be installed into the BS-240XL service1 rack if more than 6 HU for LE (> 600W) are provided.Two fan units shall be installed into the BS-240XL service2 rack if any HUs for LE are provided.Four fan units shall be installed into the BS-240XL service2 rack if more than 12 HUs for LE (> 1 kW) are provided.

A mixed configuration of fan types is permitted.

g If at least one FlexCU is installed, fan units FANV6 or FAN-NIVx must be used in all CU sub-frames.

48DN0932873


Id:0900d805805fe4bf

Antenna combining

5 Antenna combiningIn order to serve cells with different carrier numbers and antenna configurations, certain combinations of combining modules are required. These configurations provide the nec-essary performance in an effective way.

g The term "(MF/F)DUAMCO" means the modules DUAMCO, FDUAMCO and MFDUAMCO.

Antenna combining is used to connect the carrier units (CU) to the antenna system.

Duplex combining connects the receiver (RX) and the transmitter (TX) of a carrier unit to a common antenna. This is done by a duplex filter and serves as the basic function of a combining unit. Additionally this filter provides the selectivity to fulfill the require-ments according to the requests of the GSM standard. The receiver part of the duplex filter is terminated by a low noise amplifier, which further on serves several analogous outputs.

If several transmitters should use the same antenna, they have to be combined before feeding them to the TX section of the duplex filter. Two types of transmitter combining are available: Hybrid combining (wideband) and filter combining (narrow band).

TX hybrid combining is available for 2 or 4 carriers. TX filter combining is good for up to 8 carriers with the full extended FICOM and up to 6 carriers with the new FICOM6.

• FICOM: Only TX combining, no receiver path integrated. An additional DIAMCO module and also HPDU might be needed.

• FICOM6: One basic combining module with filter combining for up to 6 TX. Addition-ally, a complete receiver path for diversity reception is integrated.

All DUAMCO, FDUAMCO and MFDUAMCO modules contain two independent sections with equal functionality, that is two separate antennas are handled by those combiner devices.

• DUAMCO 2:2 : Two basic combining modules, no hybrid TX combining

• DUAMCO 4:2 : Two basic combining modules, each with hybrid combining for 2 TX

• DUAMCO 8:2: Two basic combining modules, each with hybrid combining for 4 TX

• FDUAMCO: Two basic combining modules, each with switchable hybrid combining for up to 2 TX. An expansion to 4 TX for each module may be done by the COAMCO module.

• MFDUAMCO: Two basic combining modules. For hybrid TX combining the add-on module HYBRID4 is requested.

DN0932873 49

BS-240XL product description Antenna combining

Id:0900d805805fe4bf

5.1 MFDUAMCO The MFDUAMCO (multi-standard FDUAMCO) is the successor of DUAMCO and FDUAMCO and offers a flexible way to combine by using the additional HYBRID4 and COAMCO8 modules.

Maximum number of TRXs to be connected:

• 2 TRXs with MFDUAMCO

• 4 TRXs with MFDUAMCO in combination with a HYBRID4

• 8 TRXs with MFDUAMCO in combination with a HYBRID4 and a COAMCO8

g The frequency band of the MFDUAMCO must correspond to the frequency band of the concerning cell to be served.

Design and function The MFDUAMCO consists of two (identical) modules, a remote electrical tilt (RET, hardware prepared) and a common part. Each module contains a duplex filter to be fed to a common antenna. The duplex filter combines the RX and the TX paths together. The gain of the receive path is switchable to an amplifier multicoupler (AMCO) or a mul-ticoupler (MUCO) configuration (see below Operating Modes for MFDUAMCO).

Each RX path consists of: • the low noise amplifier (LNA), two branches • an attenuator (MUCO mode only) • four equivalent outputs • a cascade output

The LNA ensures a low system noise figure and consists of two branches. In case of malfunction in one of the amplifiers, the RX gain of the MFDUAMCO decreases by about 6 dB.

The LNA provides 4 outputs of the amplified received signal. These output ports are con-nected to the corresponding carrier units by jumper cables.

Each TX path consists of: • an isolator for the TX input • an antenna supervision unit (ASU) • jumpers for combining mode setting

The isolator for the TX input protects the power amplifiers (PAs) inside the carrier units from each other in order to assure the required inter-modulation suppression.

The MFDUAMCO detects a VSWR alarm and generates a failure information towards the O&M (CAN bus interface). This information is subdivided in several levels with the following characteristics:

Module 0 of MFDUAMCO is prepared for a RET interface (to be provided via triplexer at antenna output ANT0). Module 0 supports single feeder configuration (SFC) where the power supply and the signaling for the single feeder DTMA (SDTMA) are provided also via triplexer at antenna output ANT0.

– VSWR < 2– 2 ≤ VSWR ≤ 3– VSWR > 3

no alarm or warning generation of warning "Minor VSWR fault"generation of VSWR alarm "Major VSWR fault"

50DN0932873


Id:0900d805805fe4bf

Antenna combining

The common part consists of: • a DC/DC converter plus a power distribution unit (PDU) • an O&M unit

The DC/DC converter supplies the MFDUAMCO. The power distribution unit provides the DC power supply of the MHAs/TMAs. Alarm monitoring is done with a signaling unit between MFDUAMCO and MHA/TMA.

The O&M unit transmits error messages to the COBA via a O&M bus (CAN bus).

Operating modes for MFDUAMCO The MFDUAMCO has 2 operating modes: • AMCO mode • MUCO mode

During the BTS commissioning, the RX path must be switched into one of these modes (by DIP switches, or – from BR10 onward – via LMT or RC, see below). This adjustment is done only once during the installation of the BTS by the service personnel.

The high amplifying AMCO mode is used if the antenna is directly connected to the MFDUAMCO (without a preamplifier MHA or TMA). The MFDUAMCO gain is around 20/22 dB (see Table 9, also for RXCA gain).

The low amplifying MUCO mode is used in case of cascading the MFDUAMCO with a preamplifier MHA or TMA. A built-in attenuator provides a constant gain between MHA/TMA and MFDUAMCO, independent of the cable loss. The power supply and the signaling of the MHA/TMA are provided by the MFDUAMCO via triplexer at the antenna outputs.The gain is reduced to about 2 dB (see Table 9, also for RXCA gain). The gain of the MFDUAMCO can be matched to the cable loss and the MHA/TMA gain by the DIP switch.

The gain adjustment is performed at commissioning by setting the attenuator in MFDU-AMCO/FICOM6 by dip switches, or, from BR10 onward, by using the appropriate con-figuration command in the O&M system. See the Commissioning manuals for details.

The selected mode can be read by O&M software via CAN bus interface.

From BR10 onward, the O&M support of the MFDUAMCO is extended:

• RX gain adjustment is configurable via LMT and remote via RC. Even missing or wrong DIP switch settings can be corrected from remote. In this case, the LED (TMA) is permanently green flashing.

• The VSWR thresholds for warning and alarming is configurable via O&M command. Increasing the threshold value may be useful in order to inhibit sporadic VSWR alarms.

• 3rd party TMAs (low gain, no fault signaling) are better supported by O&M software. The RX amplifier mode and the TMA power supply can be enabled/disabled inde-pendently, allowing AMCO mode and TMA power supply in parallel. This is not possible with other combiners as the TMA power supply can be only implicitly enabled in parallel with the MUCO mode. Outages of TMAs without fault signaling are detected and alarmed by using the DC monitoring feature of the MFDUAMCO.

• Product and device specific TMA information can be retrieved in case of TMA sig-naling via HDLC protocol.

DN0932873 51


Id:0900d805805fe4bf

The following figure shows the block diagram of a MFDUAMCO:

Figure 12 MFDUAMCO block diagram

MFDUAMCO

Tri-plexer

VSWRPROC

ANT0Testout 1

RXout 1

RXin 1

Tri-plexer

VSWRPROC

ANT0Testout 0

RXout 0

RXin 0

RXCA1RX0 RX2RX1 RX3

RXCA0 RX3RX1RX2RX0

DC/DCConvert.

PID

CANControl.

TMASignall.

TMADC/DCConvert.

MHASignall.

MHADC/DCConvert.

Module0 Module1

1 ACOM Slot

CAN Bus

RX TXFilter Filter

TX RXFilter Filter

LNA LNA

LNALNA

TXin0(=3)

TXin1(=3)

52DN0932873


Id:0900d805805fe4bf

Antenna combining

Configurations Depending on the use of additional hardware, the MFDUAMCO can be used in a: • 2:2 configuration

for combining up to 4 RX and 1 TX paths to each of the 2 antenna connectors. • 4:2 configuration in combination with a HYBRID4 module • 8:2 configuration in combination with a HYBRID4 and a COAMCO8 module

These configurations differ in the number of carriers to be combined to two antennas.

MFDUAMCO-HYBRID4 configuration The combination of MDFUMACO and HYBRID4 provides a 4:2 configuration which is used for combining 4 RX and 2 TX paths to each of the two antenna connectors.

Each of the two modules of a HYBRID4 provides two RF input ports and one RF output port to combine the TX paths from several carrier units to one connector.

Figure 13 HYBRID4 block diagram

MFDUAMCO-HYBRID4-COAMCO8 configuration In combination with a COAMCO8, eight TRXs can be connected (see COAMCO8).

For an 8:2 configuration, a COAMCO8 unit is used in conjunction with MFDUAMCO/HYBRID4 in 4:2 configuration. The modules provide two antenna ports and eight TX inputs.

The COAMCO8 combines two additional carriers per module with the two carriers from the output TXout(4) of the HYBRID4, feeds the four carriers back to the input TXin(3) of the MFDUAMCO and provides four additional RX outputs per module from the cascad-ing output of the MFDUAMCO.

MFDUAMCO losses (TX path) and gains (RX path)The typical combiner TX attenuation was measured for mid band at room temperature. The guaranteed combiner TX attenuation was measured for the full frequency range, taking into account the full temperature range.

MFDUAMCO type

GSM 850 GSM 900 GSM 1800 GSM 1800

Typic. Guar. Typic. Guar. Typic. Guar. Typic. Guar.

2:2 configuration t.b.d.1) 1.9 dB 0.7 dB 1.7 dB 0.6 dB 1.7 dB t.b.d. 1.7 dB

Table 8 MFDUAMCO: Insertion loss

TX0 TX1 TXOUT0

3 dB Hybrid

TX2 TX3 TXOUT1

3 dB Hybrid

DN0932873 53


Id:0900d805805fe4bf

4:2 configuration2) t.b.d. 5.5 dB 4.2 dB 5.3 dB 4.2 dB 5.3 dB t.b.d. 5.3 dB

8:2 configuration3) t.b.d. 9.4 dB t.b.d. 9.2 dB t.b.d. 9.4 dB t.b.d. 9.4 dB

1) to be done in one of the next issues of this document2) 4:2 mode is constructed with MFDUAMCO + HYBRID43) 8:2 mode is constructed with MFDUAMCO + HYBRID4 + COAMCO8

GSM 850, 900 GSM 1800, 1900

RX RXCA RX RXCA

Gain AMCO 20 dB 18.5 dB 22 dB 19.5 dB

+1.3/-1.7 dB with 100% BW

± 1.3 dB with 80% BW

Gain MUCO 2 dB 0.5 dB 3 dB 0.5 dB

+0.8/-1.2 dB with 100% BW


Attenuator range 0-12 dB

Attenuator step size 1 dB

Table 9 MFDUAMCO: Gain (guaranteed)

MFDUAMCO type

GSM 850 GSM 900 GSM 1800 GSM 1800

Typic. Guar. Typic. Guar. Typic. Guar. Typic. Guar.

Table 8 MFDUAMCO: Insertion loss (Cont.)

54DN0932873


Id:0900d805805fe4bf

Antenna combining

5.2 FDUAMCO / DUAMCO The (F)DUAMCO (flexible duplexer amplifier multicoupler) modules contain duplex filters in order to combine the transmit and receive paths to one antenna connector. The receive and transmit part of the duplex filter, respectively, provide the substantial part of the receive and transmit band filtering required by GSM 05.05, 11.21 and JTC J-STD-007.

The type of (F)DUAMCO required depends on the carriers to be combined to the antenna system. Its modules can be assigned to the same cell or to different cells.

g The frequency band of the (F)DUAMCO must correspond to the frequency band of the concerning cell to be served.

Design and function The (F)DUAMCO consists of two (identical) modules and a common part. Each module contains a duplex filter which combines the RX and the TX path together, to be fed to a common antenna.

Each RX path consists of: • the low noise amplifier (LNA), 2 branches • an attenuator (MUCO mode only) • multiple (4/8) equivalent outputs • a cascade output

The LNA ensures a low system noise figure and consists of two branches. In case of malfunction in one of the amplifiers, the RX gain of the (F)DUAMCO decreases by about 6 dB.

The LNA provides 4/8 outputs of the amplified received signal. These output ports are connected to the corresponding carrier units by jumper cables.

Each TX path consists of: • an isolator for the TX input • an antenna supervision unit (ASU) • for DUAMCO 4:2 and DUAMCO 8:2: hybrid coupler • for FDUAMCOs: jumpers for combining mode setting


The (F)DUAMCO detects a VSWR alarm and generates a failure information towards the O&M (CAN bus interface). This information is subdivided in several levels with the following characteristics:

Except in 2:2 mode, a hybrid coupler feeds two TX inputs together to the TX path.


– VSWR < 2– 2 ≤ VSWR ≤

3– VSWR > 3


DN0932873 55


Id:0900d805805fe4bf

The DC/DC converter supplies the (F)DUAMCO itself. The PDU provides the DC power supply and the alarm monitoring of the TMAs. Alarm monitoring is done with a signaling interface between (F)DUAMCO and TMA.

The O&M unit transmits error messages to the COBA via a O&M bus (CAN bus).

Operating modes for (F)DUAMCOThe (F)DUAMCO has two operating modes. During the BTS commissioning, the RX path must be switched into one of these modes (by DIP switches): • AMCO mode • MUCO mode

The high amplifying AMCO mode is used if the antenna is directly connected to the (F)DUAMCO (without a preamplifier TMA). The (F)DUAMCO gain is around 20/22 dB (see Table 12 and Table 13, also for RXCA gain).

The low amplifying MUCO mode is used in conjunction with a preamplifier (TMA). In the MUCO mode, the gain is reduced to about 2 dB. The gain of the (F)DUAMCO can be matched to the cable loss and the TMA gain with the DIP switch. This adjustment is only done once during the installation of the BTS by the service personnel.


A DUAMCO 2:2 or 4:2 or FDUAMCO in 2:2 or 4:2 mode has 4 RX outputs per antenna.

A DUAMCO 8:2 or FDUAMCO in 4:2 mode in combination with a COAMCO8 has 8 RX outputs per antenna.

(F)DUAMCO losses (TX path) The typical combiner TX attenuation was measured for mid band at room temperature. The guaranteed combiner TX attenuation was measured for the full frequency range, taking into account the full temperature range.

GSM 900, GSM 1800, GSM 1900

DUAMCO type Typical Guaranteed

DUAMCO 2:2 1.2 dB 2.5 dB



Table 10 DUAMCO: Insertion loss

GSM 850 GSM 900 GSM 1800, GSM 1900

FDUAMCO type Typical Guar. Typical Guar. Typical Guar.

in 2:2 mode 1.1 dB 2.4 dB 1.1 dB 2.2 dB 1.2 dB 2.2 dB



(8:2 mode is constructed with FDUAMCO in 4:2 mode +COAMCO8)

Table 11 FDUAMCO: Insertion loss

56DN0932873


Id:0900d805805fe4bf

Antenna combining

(F)DUAMCO gains (RX path)

5.2.1 DUAMCO specials g The DUAMCO x:y are named depending on the number "x" of transmit connectors

fed by the carrier units and the number "y" of antenna connectors.

Different versions of DUAMCO are available: • DUAMCO 2:2 to combine up to 2 carriers (DUAMCO2xxx types) • DUAMCO 4:2 to combine up to 4 carriers (DUAMCO4xxx types) • DUAMCO 8:2 to combine up to 8 carriers (DUAMCO8xxx types)

g DUAMCOs of different versions have a different TX attenuation.

If two carriers shall be combined to the antenna system, the TX output of each carrier unit has to be fed to a TX input of a DUAMCO 2:2. Combining of the two carriers takes place on air.

If more than two carriers shall be combined to the antenna system, a DUAMCO 4:2 or DUAMCO 8:2 is necessary.

GSM 850, 900 GSM 1800, 1900

RX RXCA RX RXCA


± 1.5 dB


± 1.0 dB

Attenuator range 0+6 dB ± 0.5 dB

Attenuator step size 1 dB ± 0.3 dB

Table 12 DUAMCO: Gain (guaranteed)

GSM 850, 900 GSM 1800, 1900

RX RXCA RX RXCA


± 1.5 dB with 100% BW



± 1.0 dB with 100% BW




Table 13 FDUAMCO: Gain (guaranteed)

DN0932873 57


Id:0900d805805fe4bf

The following figures show the block diagrams of the different types of DUAMCO:

Figure 14 DUAMCO 2:2 block diagram


ANT0

Module 0 Module1

RXCA RX

CAN Bu s0

LNA

LNA

TXRX RXRX00 1 2 3

MUCO

AMCO

Mode

Mode

TMADC + Signall.

DCCTRL

O&M

-48 V

BiasTEE

1 ACOM Slot

RX TX

ASU

RXCA RX1

LNA

LNA

TXRX RXRX10 1 2 3

MUCO

AMCO

Mode

Mode

BiasTEE

RX TX

ASU

ANT1

ANT0

Module 0M odule1

RXCA RX

CAN Bu s0

LNA

LNA

TXRX RX RX00 1 2 3

MUCO

AMCO

Mode

Mode

-48 V

BiasTEE

1 ACOM Slot

RX TX

ASU

RXCA RX1

RX RX RX0 1 2 3

BiasTEE

RX TX

ASU

ANT1

Coupler

TX1

TX0

Coupler

TX1

LNA

LNA

MUCO

AMCO

Mode

Mode

TMADC + Signall.

DCCTRL

O&M

58DN0932873


Id:0900d805805fe4bf

Antenna combining


5.2.2 FDUAMCO specials The FDUAMCO is the successor of the DUAMCO.

A maximum of four TRXs can be connected to one FDUAMCO. In combination with a COAMCO8, eight TRXs can be connected (see COAMCO8).

Each half of the FDUAMCO can be configured in "One-To-One" mode (like DUAMCO 2:2) and "Two-To-One" mode (like DUAMCO 4:2) by means of jumper cables, which insert the 3 dB hybrid or not. "One-To-One" means that the hybrid is not used, "Two-To-One" means that the hybrid is used.

ANT0

Module 0 Module 1

RXCA

CAN Bu s0

LNA

LNA

TX0

MUCO

AMCO

Mode

Mode

BiasTEE

RX TX

ASU

RXCA1

BiasTEE

RX TX

ASU

ANT1

Coupler

LNA

LNA

MUCO

AMCO

Mode

Mode

TX1

TX2

TX3

Coupler

TX1

TX0

TX2

TX3

TMADC + Signall.

DCCTRL

O&M

RX RX

2 ACOM Slots

-48 V0 7 0RXRX

DN0932873 59


Id:0900d805805fe4bf

The following figure shows the block diagram of a FDUAMCO:

Figure 17 FDUAMCO block diagram

Tri-plexer

VSWRPROC

ANT1Testout1

RXout1

RXin1

Tri-plexer

VSWRPROC

ANT0Testout0

RXout0

RXin0

RXCA1RX0 RX2RX1 RX3

RXCA0 RX3RX1RX2RX0

TMASignall.

TMADC/DCConvert.

DC/DCConvert.

PID

CANControl.

Module0 Module1

1 ACOM Slot

TX1 T X0 TX1 T X02 1 4 3 2 1 4 3

3 dB Hybrid3 dB Hybrid

CAN Bu s

RX TXFilter Filter

TX RXFilter Filter

LNA LNA

LNALNA

60DN0932873


Id:0900d805805fe4bf

Antenna combining

5.3 COAMCO8 The COAMCO8 (co-amplifier multicoupler) can be used in combination with an FDUAMCO or an MFDUAMCO.

The combinations with COAMCO8 provide an 8:2 configuration by including 4 additional carriers (TRXs):

• with FDUAMCO in 4:2 mode (see Figure 19)

• with MFDUAMCO and HYBRID4 (see Figure 20)

A COAMCO8 unit consists of two identical modules, containing a transmit and a receive path each. Each module of the COAMCO8 combines two additional carriers with the two TX inputs of the MFDUAMCO or FDUAMCO.

In sum the COAMCO8 combines eight carrier units: either in combination with FDUAMCO (jumpered in 4:2 mode) or in combination with MFDUAMCO/HYBRID4.

Figure 18 COAMCO8 block diagram

The RX cascading outputs of the MFDUAMCO/FDUAMCO provide the RX input signals for the additional 4 RX outputs of the COAMCO8.

RXCA1RX0 RX2RX1 RX3

RXCA0 RX3RX1RX2RX0

DC/DCConvert.

TX0 TX1 4 3

3 dB HybridsAMP AMP

TX2 TX3 4 3

3 dB Hybrids

RXCA0 in RXCA1 in

Module0 Module1

DN0932873 61


Id:0900d805805fe4bf

Combination with FDUAMCO

Figure 19 COAMCO with FDUAMCO in 4:2 mode (= 8:2 mode)

RX TX

X

RX TX

XCOAMCO8FDUAMCO in 4:2 mode

RX0 RX3.. .

TX4TX5

RX0 RX3... RX4 RX7.. . RX4 RX7...

+

RX cascading outputTX cascading outputTX input FDUAMCO = TX output COAMCO8

TX6TX7

TX2TX3

TX0TX1

62DN0932873


Id:0900d805805fe4bf

Antenna combining

Combination with MFDUAMCO and HYBRID4

Figure 20 COAMCO8 with MFDUAMCO and HYBRID4 (8/0/0)

X X

COAMCO8MFDUAMCO

RX0 RX3...

TX4TX5

RX0 RX3... RX4 RX7.. . RX4 RX7...

+

RX cascading outputTX cascading output from HYBRID4TX input MFDUAMCO = TX output COAMCO8

TX6TX7

RX TXRX TX

TX0 TX1

TXout

HYBRID4+

TX2 TX3

TXout

main div

ANT0 ANT1

HYBRID4

COAMCO8MFDUAMCO

DN0932873 63


Id:0900d805805fe4bf

5.4 DIAMCO The DIAMCO (dual integrated amplifier multicoupler) is required for the RX signal path in FICOM configurations and special DUAMCO configurations.

The DIAMCO is required to implement two cells/sectors with RX diversity in a base or extension rack. The DIAMCO distributes the RX and RX diversity signals to up to 8 TRXs. Therefore it filters and distributes the received signals to the carrier units in one rack. The receive filters provide the substantial part of the receive band filtering required by GSM 05.05, 11.21 and JTC J-STD-007.

g The frequency band of the DIAMCO must correspond to the frequency band of the concerning cell to be served.

Design and functionThe DIAMCO consists of a common part and two identical, independent modules which can be assigned to the same cell or to different cells as long as they operate in the same frequency band.

Each module contains: • an RX filter • the low noise amplifier (LNA) • an attenuator • a power splitter • a cascade output

The LNA ensures a low system noise figure and consists of two branches. In case of malfunction in one of the amplifiers, the RX gain of the DIAMCO decreases by about 6 dB.

A DIAMCO has 8 RX outputs per antenna to distributes the received band to the carrier units.

The common part consists of: • a DC/DC converter plus a power distribution unit (PDU) for two TMAs • an O&M unit

The DC/DC converter supplies the DIAMCO itself. The functionality of a PDU for two TMAs by means of an antenna feeder cable is integrated. This is the DC power supply and the alarm monitoring of the TMAs. Alarm monitoring is done with a signaling inter-face between DIAMCO and TMA. This interface is identical to the interface between (F)DUAMCO and TMA.

The O&M unit transmits error messages to the BTS core via a O&M bus (CAN bus).

Due to the fact that TMA status information is available for the DIAMCO processor, the DIAMCO itself has to switch the RX mode according to the TMA status. Each TMA can be switched on or off by a separate switch.

Operating modes for DIAMCOThe DIAMCO RX amplifier has two operating modes, depending on the existence of TMAs: AMCO mode and MUCO mode.

During the BTS commissioning, the RX path must be switched into one of these modes: • AMCO mode • MUCO mode

64DN0932873


Id:0900d805805fe4bf

Antenna combining

The high amplifying AMCO mode is used if the antenna is directly connected to the DIAMCO (without a preamplifier, e.g. TMA). The DIAMCO gain is around 20/22 dB (see Table 14, also for RXCA gain).

The low amplifying MUCO mode is used in conjunction with a preamplifier (TMA). In the MUCO mode, the gain is reduced to about 2 dB. The gain of the DIAMCO can be matched to the cable loss and the TMA gain with the DIP switch. This adjustment is only done once during the installation of the BTS by the service personnel.


When cascading DIAMCOs, the first DIAMCO works in the AMCO mode and the follow-ing DIAMCO in the MUCO mode.

The following figure shows the block diagram of a DIAMCO:

Figure 21 DIAMCO block diagram

DIAMCO gains (RX path)

ANT0

Module 0 Module 1

RXCA RX

CAN Bus

0

RX

LNA

LNA

RX RX RX RX0 1 2 3 4

RX RX RX 5 6 7

MUCO

AMCO

Mode

Mode

ANT1

RXCA RX1

RX

LNA

LNA

RX RX RX RX0 1 2 3 4

RX RX RX5 6 7

MUCO

AMCO

Mode

Mode

TMADC + Signall.

DCCTRL

O&M

-48 V

DIAMCO

BiasTEE

BiasTEE

DN0932873 65


Id:0900d805805fe4bf

GSM 850, 900 GSM 1800, 1900

RX RXCA RX RXCA


± 1.5 dB


±1.0 dB



Table 14 DIAMCO: Gain (guaranteed)

66DN0932873


Id:0900d805805fe4bf

Antenna combining

5.5 Antenna line equipment MHA/TMA The MHA (mast head amplifier) and TMA (tower mounted amplifier) are optional modules that connect the antenna with the BTS in order to amplify the receive signal and pass through the transmit signal.

The configuration with MHA or TMA is advantageous because of the compensation of the antenna feeder cable losses.

The TMA contains two duplex filters, each on one RF connector, to separate and combine the receive and transmit path inside the TMA.

In cell configuration with an MHA or TMA, the true system RX sensitivity is guaranteed at the antenna, independent of the antenna feeder cable attenuation.

One MHA is needed for two RX paths of MFDUAMCO/FICOM6.

One single TMA (STMA) is needed for each RX path of (F)DUAMCO/DIAMCO. One dual TMA (DTMA) is needed for two RX paths of (F)DUAMCO/DIAMCO.

The FICOM6 supports 3rd party TMA units in current window mode, no legacy TMA units.

When MHA/TMA is used, the MFDUAMCO or (F)DUAMCO/DIAMCO, respecitvely, works in the MUCO (multicoupler) mode, see Operating modes for FICOM6, Operating modes for MFDUAMCO, Operating modes for (F)DUAMCO, or Operating modes for DIAMCO.

The DC power for the MHA/TMA is supplied by the MHA/TMA DC power supply within the (M)(F)DUAMCO.

The encoder/decoder of the MHA/TMA signaling unit generates a separate alarm for each MH/A/TMA by monitoring the DC current consumption of each unit.

Different types of MHA for different frequency bands exist: • MDTA (850 MHz) • MDGA (E-GSM, 900 MHz) • MDDA (1800 MHz) • MDPA (1900 MHz)

Two kinds of TMA exist: the "single TMA" and the "dual TMA".

The single TMA (types TMA and STMA) consists of: • two duplex filters to split RX and TX paths • the low noise amplifier (LNA) to amplify RX signals • "Fail Safe Functionality" to ensure operation in case of faulty LNA

A dual TMA (type DTMA) consists of two identical, independent single TMA modules. Two (S)TMAs may be replaced by one DTMA unit of the same frequency band.

The following figures show the block diagrams of the TMA single and dual and MHA:

DN0932873 67


Id:0900d805805fe4bf

Figure 22 TMA (single) block diagram

Figure 23 MHA / TMA (dual) block diagram (RET only at MHA)

ANT

IN

COM

OUT

Tri-plexer

RXFilter 2

RX TXFilter 1 Filter

FailSafeSwitch

TMA TMA

ANT

IN

COM

OUT

Tri-plexer

RXFilter 2


ANT

IN

COM

OUT

Tri-plexer

RXFilter 2


RET

68DN0932873


Id:0900d805805fe4bf

Antenna combining

MHA parameters

Parameter MDTA(850 MHz)

MDGA(900 MHz)

MDDA(1800 MHz)

MDPA(1900 MHz)

-40°C - +55°C(-40°F - +131°F)

TX insertion loss 0.8 dB max 0.8 dB max

Gain (Ant-Com) 32 dB ± 1.0 dB 12/33 dB ± 1.0 dB

Noise figure (Ant-Com) 2.2 dB max

Attenuation failsafe ≤ 4.0 dB

Return loss (RX) 16.0 dB min 18.0 dB min

Return loss (TX) 18.0 dB min

Input P1dB ≥ 32 - 7 dBm min ≥ 32 - 10 dBm min

IIP3 32 + 5.2 dBm ≥ 32 + 3 dBm min

Operational current range 300 - 750 mA 300 - 750 mA (high gain)

100 - 190 mA (low gain)

Operational voltage range 10 - 30 V 10 - 30 V

Power RET port 17 W max 15 W max

Operational power range 10 W max 10 W max (high gain)

4 W max (low gain)

Intermodulation ANT port

-116 dB (Rx band 3rd order; 2 x Tx carrier at 43 dBm)

-115 dB (Rx band 3rd order; 2 x Tx carrier at 43 dBm)

Table 15 MHA: electrical parameters

Parameter MDTA(850 MHz)

MDGA(900 MHz)

MDDA(1800 MHz)

MDPA(1900 MHz)

-40°C - +55°C(-40°F - +131°F)

Size (W x H x D) 250 mm x 350 mm x 100 mm 210 mm x 295 mm x 65 mm

Weight approx. 9 kg approx. 5 kg

Antenna connector 7/16

BTS connector 7/16

Table 16 MHA: mechanical parameters

DN0932873 69


Id:0900d805805fe4bf

TMA parameters

Parameter Single TMA:GSM 850, GSM 900

Double TMA:GSM 1800, GSM 1900

-25°C - +45°C(-13°F - +113°F)

-40°C - +65°C(-49°F - +149°F)

-25°C - +45°C(-13°F - +113°F)

-40°C - +65°C(-49°F - +149°F)

Insertion loss 0.8 dB (0.5 dB typical)

Gain (Ant-Com) 24 dB ± 2.0 dB 24 dB ± 2.5 dB 24 dB ± 2.0 dB 24 dB ± 2.5 dB

Noise figure (Ant-Com) ≤ 2.2 dB ≤ 3.0 dB ≤ 2.2 dB ≤ 3.0 dB

Attenuation failsafe ≤ 4.0 dB ≤ 4.2 dB ≤ 4.0 dB ≤ 4.2 dB

P1dB (Com) ≥ 18 dBm ≥ 12 dBm

IP3 (Com) ≥ 28 dBm

Current consumption ≤ 500 mA ( ≤ 6 W) ≤ 1 A ( ≤ 12 W)

Nominal voltage 12 V ± 8%

Table 17 TMA: electrical parameters (guaranteed)

Parameter Single TMA:GSM 850, GSM 900

Double TMA:GSM 1800, GSM 1900

-25°C - +45°C(-13°F - +113°F)

-40°C - +65°C(-49°F - +149°F)

-25°C - +45°C(-13°F - +113°F)

-40°C - +65°C(-49°F - +149°F)

Size (W x H x D) 175 mm x 282 mm x 95 mm(6.9” x 11” x 3.7”)

345 mm x 235 mm x 85 mm(13.6” x 9.3” x 3.4”)

Weight approx. 6 kg(approx. 13.2 lbs)

approx. 10 kg(approx. 22.0 lbs)

Antenna connector 7/16

BTS connector 7/16

Table 18 TMA: mechanical parameters (guaranteed)

70DN0932873


Id:0900d805805fe4bf

Antenna combining

5.6 FICOM6 The FICOM6 (filter combiner with 6 tunable narrowband filters) is the successor of the FICOM base and expansion modules and provides the same functionality like an MFDUAMCO module.

The installation of a FICOM6 needs two horizontal adjacent ACOM slots.

RF power combining / tuning modesThe low loss power addition is carried out by combining the outputs of remote tunable narrowband filters (TNFs) inside the FICOM6. These TNFs are remotely tuned to the channel frequency of the corresponding carrier. It is possible to combine a minimum of 2 and a maximum of 6 TX signals in each FICOM6.

A TNF is first coarse tuned to the desired channel. If RF power is supplied to the TNF it automatically performs a fine tuning to ensure the best RF performance. With this auto-matic tuning process, the drift of the passband filter center frequency is compensated.

Therefore, the FICOM6 can only be used with baseband frequency hopping, as retuning of the TNF frequency requires up to 5 seconds.

For a large number of carriers (6 and higher), baseband frequency hopping has only a negligible disadvantage compared to synthesizer frequency hopping.

Design and function The FICOM6 consists of two modules and a common part. One of the modules (module 1) contains an RX path. The other module (module 0) contains a duplex filter to be fed to a common antenna. The duplex filter combines the RX and the TX paths together. The gain of the receive path is switchable to an amplifier multicoupler (AMCO) or a multicoupler (MUCO) configuration (see below Operating Modes for FICOM6).

Each RX path consists of: • the low noise amplifier (LNA), two branches • an attenuator (for MUCO and AMCO mode) • six equivalent outputs • a cascade output

The LNA ensures a low system noise figure and consists of two branches. In case of malfunction in one of the amplifiers, the RX gain of the FICOM6 decreases by about 6 dB.

The LNA provides six outputs of the amplified received signal. These output ports are connected to the corresponding carrier units by jumper cables.

The RX signal from main antenna port ANT0 (see Figure 24) is passed through to the duplexer, where the RX bandpass filter section selects the uplink band signal. Normally, this signal is routed to the LNA over a jumper line connected at the front plate of the module (RXin, RXout). This bridge is only omitted when the BTS needs a simplex RX input, because the RX signal is not provided directly by the antenna but by an RX signal distribution unit, e.g. another co-sited BTS or some 3rd party RX multicoupler.

LNA1 is optimized for low noise figure. A failure of LNA1 generates a major alarm in the O&M system. The attenuator can be adjusted over a range of 12 dB (in steps of 1 dB) to set the total gain of the RX path from antenna port to TRX input port to the nominal value. The attenuator works in both modes (AMCO and MUCO) to allow correct gain setting for a great variety of antenna system configurations.

DN0932873 71


Id:0900d805805fe4bf

The activation of the by-pass switch and the adjustment of the attenuator can be done via DIP switches or O&M commands.

LNA2 is optimized for high output power and linearity to direct up to 6 RX outputs to the TRX units through the power splitter and a further cascading output (RXCA). LNA2 is a two-branch amplifier for enhanced reliability. A failure of one branch of LNA2 generates a minor alarm, and a failure of both branches of LNA2 generates a major alarm in the O&M system.

The RX path from antenna port ANT1 (RX diversity) is equal to the main RX path with the following exceptions: The antenna port ANT1 is directly connected with the RX bandpass filter, without any duplexer. The RXin/RXout connectors are not needed because the antenna port ANT1 is a simplex port only. The RX output ports direct the diversity RX inputs to up to 6 TRXs.

The TX path consists of: • six tunable narrowband filters (TNFs) • an isolator for the TX input • an antenna supervision unit (ASU) • jumpers for combining mode setting


The TX signals from up to 6 TRXs, each operating on a different carrier frequency, are passed through TNFs. The filter passband is just wide enough for a single GSM radio frequency channel and its center frequency is tuned by an electric motor under control of the module's micro controller. The TNF outputs are summed and routed to the duplexer. The duplexer passes the composite TX signal through its TX bandpass filter section towards the antenna port. The DUBIAS allows coupling DC supply current and controlling signal on the RF line, which are needed to control active antenna-near devices like MHA, DTMA and RET. Finally, the VSWR sensor measures the VSWR on the feed line and outputs the composite TX signal to the main antenna port ANT0.

The FICOM6 detects a VSWR alarm and generates a failure information towards the O&M (CAN bus interface). This information is subdivided in several levels with the fol-lowing characteristics:


The DC/DC converter supplies the FICOM6 itself. The PDU provides the DC power supply and the alarm monitoring of the TMAs. Alarm monitoring is done with a signaling interface between FICOM6 and TMA.

The O&M unit transmits error messages to the COBA via a CAN bus.

– VSWR < 2– 2 ≤ VSWR ≤ 3– VSWR > 3


72DN0932873


Id:0900d805805fe4bf

Antenna combining

Operating modes for FICOM6 The FICOM6 has two operating modes. During the BTS commissioning, the RX path must be switched into one of these modes by O&M commands: • AMCO mode • MUCO mode

The high amplifying AMCO mode is used if the antenna is directly connected to the FICOM6 (without a preamplifier MHA or TMA). The FICOM6 gain is around 20/22 dB (see Table 20, also for RXCA gain).

The low amplifying MUCO mode is used in case of cascading the FICOM6 with a pre-amplifier MHA or TMA. A built-in attenuator provides a constant gain between MHA/TMA and FICOM6, independent of the cable loss. The power supply and the sig-naling of the MHA/TMA are provided by the FICOM6 via triplexer at the antenna outputs. The gain is reduced to about 2 dB (see Table 20, also for RXCA gain). The gain of the FICOM6 can be matched to the cable loss and the TMA gain with the DIP switch. This adjustment is only done once during the installation of the BTS by the service personnel.

The gain adjustment is performed at commissioning by setting the attenuator in FICOM6 by using the appropriate configuration command in the O&M system. See the Commis-sioning manuals for details.


The following features of O&M support are available:

• RX gain adjustment is configurable via LMT and remote via RC; even missing or wrong DIP switch settings can be corrected from remote. In this case, the LED (TMA) is permanently green flashing.

• VSWR thresholds for warning and alarming is configurable via O&M command.

• 3rd party TMAs (low gain, no fault signaling) are supported by O&M software. The RX amplifier mode and the TMA power supply can be enabled/disabled indepen-dently, allowing AMCO mode and TMA power supply in parallel.

DN0932873 73


Id:0900d805805fe4bf

The following figure shows the block diagram of a FICOM6:

Figure 24 FICOM6 block diagram

ANT0 2 ACOM Slots ANT1Testout

Module0 Module1

TX0

LNA1 LNA1

LNA2 LNA2

RXout

RXin

CAN Bus

6 TNFs

RX0 ... RX5 TX1 TX2 TX3 TX4 TX5RXCA0 RX0 ... RX5 RXCA1

VSWRPROC

Tri-plexer

RXFilter0

TXFilter

Tri-plexer

RXFilter1

TMASignall.

TMADC/DC

Convert.

CANControl.

PID

DC/DCConvert.

74DN0932873


Id:0900d805805fe4bf

Antenna combining

FICOM6 losses (TX path) and gains (RX path)The typical combiner TX attenuation was measured for mid band at room temperature. The guaranteed combiner TX attenuation was measured for the full frequency range, taking into account the full temperature range. The measures were taken with 6 carriers with a minimum carrier separation (spacing) of 600 kHz.

g With lower spacing, e.g. 400 kHz, the RX behavior of FICOM6 is worse (appr. 1.5 dB more insertion loss = 4.5 dB).

GSM 900 GSM 1800

FICOM6 Typical Guaranteed Typical Guaranteed

80% Bandwidth t.b.d. 1)

1) to be done in one of the next issues of this document

3.0 dB 2)

2) preliminary value, without guarantee

t.b.d. 3.0 dB 2)

100% Bandwidth t.b.d. 3.5 dB 2) t.b.d. 3.5 dB 2)

Table 19 FICOM6: Insertion loss

GSM 900 GSM 1800

RX RXCA RX RXCA


+1.3/-1.7 dB with 100% BW



+0.8/-1.2 dB with 100% BW


Attenuator range 0-12 dB

Attenuator step size 1 dB

Table 20 FICOM6: Gain (guaranteed)

DN0932873 75


Id:0900d805805fe4bf

5.7 FICOMWith the FICOM it is possible to combine up to 8 signals to one antenna. For the uplink direction (RX), the DIAMCO has to be used to filter and distribute the received signals to the carrier units. The FICOM consists of remote tunable narrowband filters (TNF).

The advantage of this filter combining technique is the very low insertion loss for up to 8 TX signals combined to one antenna.

In principle the FICOM offers lightning protection at the RF output connector and the fol-lowing main RF functions:

• RF power combining • Transmitter spurious signal suppression • Isolation between inputs • Isolation output to input

RF power combining / tuning modesThe low loss power addition is carried out by combining the outputs of TNFs inside the FICOM. These TNFs are remotely tuned to the channel frequency of the corresponding carrier. It is possible to combine a minimum of two and a maximum of eight TX signals by adding "expansion modules" to the "base module", see section FICOM Modularity.

A TNF is first coarse tuned to the desired channel. If RF power is supplied to the TNF it automatically performs a fine tuning to ensure the best RF performance. With this auto-matic tuning process, the drift of the passband filter center frequency is compensated.

Therefore, the FICOM can only be used with baseband frequency hopping, as retuning of the TNF frequency requires up to 5 seconds.

For a large number of carriers (6 and higher), baseband frequency hopping has only a negligible disadvantage compared to synthesizer frequency hopping.

FICOM modularityThe FICOM functions are carried out by two types of modules: • Base module 2:1 • Expansion module 2:1

One base module is needed per cell.

The base module is able to combine two carriers to one antenna. For more than two carriers per cell the base module can be expanded by expansion module(s).

An expansion module can combine additional up to two carriers to the same antenna.

Altogether one base module can be expanded by three expansion modules, which means eight carriers belonging to the same cell can be connected to the same antenna.

The different modules are connected together by a special RF connection cable.

The base module has an output stage for the combined TX signal of all base and expan-sion modules (antenna output with 7/16 connector). Additionally, there is a test output at every base module. The base module reports the VSWR status.

In case of an odd number of carriers in one cell, only one half of the expansion module 2:1 is used. For this application, one TX port remains open.

76DN0932873


Id:0900d805805fe4bf

Antenna combining

Figure 25 FICOM 8:1 block diagram

FICOM losses (TX path)

g Name convention for FICOMs:The first part gives the number of carriers (= 2 * number of modules), the second part gives the minimum frequency distance between these carriers in kHz. For example:FICOM4/600 means four carriers with a minimum frequency distance of 600 kHz.

TNF TNFESN

VS WRsupervision

TNF TNFESN

TNF TNFESN

TNF TNFESN

Base 2:1 Exp 2:1 Exp 2:1 Exp 2:1

CTRLDC interf.

CTRLDC interf.

CTRLDC interf.

CTRLDC interf.

CAN Bu s CAN Bu s CAN Bu s CAN BusTX0 TX1 TX0 TX1 TX0 TX1 TX0 TX1

GSM 900 GSM 1800

FICOM type Typical Guaranteed Typical Guaranteed

FICOM 2/600 2.3 dB 2.7 dB 2.5 dB 3.7 dB

FICOM 4/600 2.5 dB 3.2 dB 3.0 dB 4.2 dB

FICOM 6/800 3.0 dB 3.7 dB 3.5 dB 4.8 dB

FICOM 8/800 3.5 dB 4.2 dB 4.0 dB 5.8 dB

Table 21 FICOM: Insertion loss

DN0932873 77


Id:0900d805805fe4bf

5.8 HPDUThe HPDU (high power duplexer) combines the TX and the RX paths into one antenna, in order to minimize the number of antennas when a FICOM is used. The HPDU contains a duplex filter for the transmit frequency band and for the receive frequency band, but no LNA in the RX path.

If the TMA is used together with a HPDU, the BIAS-T (DUBIAS) for powering and sig-naling of the TMA is required. For the main RX path, one HPDU per cell is installed. For diversity operation, a second receive path has to be installed.

In one base or extension rack, one or two HPDUs can be installed. Figure 26 shows the standard configuration for one cell using HPDU, FICOM and DIAMCO for up to eight carriers in one rack.

Figure 26 HPDU 8 TRXs

HPDU losses (TX path)

GSM 900 GSM 1800

Typical Guaranteed Typical Guaranteed

HPDU 0.4 dB 0.6 dB 0.5 dB 0.75 dB

Table 22 HPDU: Insertion loss

TX RX

HPDU

FICOM DIAMCO

RX

TX RX

TX TX0 7

RX0

... RXdiv ... RXdiv... RX7 70

78DN0932873


Id:0900d805805fe4bf

Antenna combining

BIAS-T (DUBIAS)If the TMA is to be used together with a HPDU, a BIAS-T (DUBIAS) for powering and signaling of the TMA is required.

Figure 27 HPDU 8 TRXs with DUBIAS and TMA

TMA TMA

DUBIAS

HPDU

FICOM

TX

DIAMCO

0TX7

RX0

RX7.. ... .

DN0932873 79


Id:0900d805805fe4bf

5.9 DiplexerThe diplexer gives the possibility to use one antenna feeder cable for both GSM 850 with GSM 1900 and GSM 900 with GSM 1800 frequencies. One diplexer is needed to combine the two different frequencies at the BTS side and the other one to separate the frequencies near the antennas.

The diplexer offers the possibility to reduce the number of antenna feeder cables in all cases where GSM 900 and GSM 1800, GSM 1900 or GSM 850 and GSM 1900 feeder cables have to be installed in parallel. For example: An existing GSM 900 network will be extended by a GSM 1800 or GSM 1900 network to implement a dual band network.

g The diplexer is a commodity product, which is available from many filter manufac-turers.

Figure 28 Configuration with diplexer (example)

Antenna Dual Band

900 MHz1800 MHz

Diplexer

DUAMCO 2:2(1800 MHz)

DUAMCO 2:2(900 MHz)

Diplexer

f1 f2

f1 + f2

f1 f2

80DN0932873


Id:0900d805802393ea

Cell configurations

6 Cell configurations The following figures show an assortment of possible cell configurations.

– 4/4/4 with duplex combining (see Figure 29)

– 12/0/0 with duplex combining (see Figure 30 and Figure 31)

– 8/8/8 with duplex combining (base and extension rack) (see Figure 32)

– 12/12/0 with duplex combining (base and extension rack) (see Figure 33)

– FDUAMCO configuration 2:2 and 4:2 (see Figure 34)

– FDUAMCO configuration 8:2 with COAMCO8 (see Figure 35)

Figure 29 Multi-Cell (4,4,4): with 3 DUAMCO 4:2

RX TX

DUAMCO 4:2

CELL 0

Coupler

RX TX

Coupler

TRX0 1 2 3

RX TX

DUAMCO 4:2

CELL 1

Coupler

RX TX

Coupler

TRX4 5 6 7

RX TX

DUAMCO 4:2

CELL 2

Coupler

RX TX

Coupler

TRX8 9 10 11

DN0932873 81

BS-240XL product description Cell configurations

Id:0900d805802393ea

Figure 30 Single-Cell (12,0,0): with 2 DUAMCO 8:2

Figure 31 Single-Cell (12,0,0): with 3 DUAMCO 4:2

RX TX

DUAMCO 8:2

CELL 0

Coupler

RX TX

Coupler

4 5TRX0 1 2 3

RX TX

DUAMCO 8:2

Coupler

RX TX

Coupler

10 11TRX6 7 8 9

RX TX

DUAMCO 4:2

CELL 0

Coupler

RX TX

Coupler

TRX0 1 2 3

RX TX

DUAMCO 4:2

Coupler

RX TX

Coupler

TRX4 5 6 7

RX TX

DUAMCO 4:2

Coupler

RX TX

Coupler

TRX8 9 10 11

82DN0932873


Id:0900d805802393ea

Cell configurations

Figure 32 Multi-Cell (8,8,8): with 4 DUAMCO 8:2 (base and extension rack)

Figure 33 Multi-Cell (12,12,0): with 4 DUAMCO 8:2 (base and extension rack)

8 TRX4 TRX4 TRX8 TRX

8 TRX4 TRX4 TRX8 TRX

DN0932873 83

BS-240XL product description Cell configurations

Id:0900d805802393ea

Figure 34 FDUAMCO configuration 2:2 or 4:2

Figure 35 Configuration 8:2 with FDUAMCO and COAMCO8

Module 0 Module 1RX TX RX TX

FDUAMCO + COAMCO8

RX

TX0/1

RXdiv

TX2/3

RXdiv TX4/5

TX6/7

RXdiv4..7 4..7 0..30..3

RX TXRX TXModule 0 Module 1

8:2

Module 0 Module 1

RX

TX

RX TXRX TX RX TXRX TX

RXdiv RX

TX

RXdiv

Module 0 Module 1RX TXRX TX RX TXRX TX

FDUAMCO 2:2 FDUAMCO 4:2

TRX1TRX0 TRX0 TRX2TRX1 TRX3

84DN0932873


Id:0900d80580239400

FCC issues (for U.S. market only)

7 FCC issues (for U.S. market only)In this chapter, you find the power reduction for corner frequencies of carrier units avail-able in the USA. These values are only relevant for the U.S. market.

Revised FCC certification for ECU / FlexCU 850For ECUs/FlexCUs with 869.2 and 893.8 MHz frequencies, in order to fulfil the FCC requirements in the USA, the maximum transmitting power of the corner frequencies of the GSM 850 band (channel numbers 128 and 251, and 869.2 MHz and 893.8 MHz respectively) is decreased for all carrier units available for the U.S. market.

This function is required by law and is therefore implemented as a fixed software com-ponent, which cannot be changed or removed locally.

The BTS evaluates the mobile country code (MCC) provided by the BSC via the attribute "cellGlobalIdentity". If the MCC indicates "USA", the BTS reduces the output power of the corner frequencies dependent on the hardware type of the carrier unit. The following table represents the power reduction values for GMSK and 8PSK modulation.

Carrier unit type GMSK 8PSK

128 251 128 251

ECU V2 -8 dB -4 dB -4 dB -2 dB

ECU HPV2 -6 dB -4 dB -4 dB -2 dB

ECU V3(A) -6 dB -4 dB -4 dB -2 dB

FCU V1 -8 dB -8 dB -4 dB -4 dB

Table 23 Power reduction of the carrier units (ECU/FlexCU 850) at antenna port

DN0932873 85

BS-240XL product description FCC issues (for U.S. market only)

Id:0900d80580239400

Revised FCC certification for ECU / FlexCU 1900For ECUs/FlexCUs with 1930.2 and 1989.8 MHz frequencies, in order to fulfil the FCC requirements in the USA, the maximum transmitting power of the corner frequencies of the GSM 1900 band (channel numbers 512 and 810, and 1930.2 MHz and 1989.8 MHz respectively) is decreased for all carrier units available for the U.S. market.

This function is required by law and is therefore implemented as a fixed software com-ponent, which cannot be changed or removed locally.

The BTS evaluates the mobile country code (MCC) provided by the BSC via the attribute "cellGlobalIdentity". If the MCC indicates "USA", the BTS reduces the output power of the corner frequencies dependent on the hardware type of the carrier unit. The following table represents the power reduction values for GMSK and 8PSK modulation.

Carrier unit type GMSK 8PSK

512 810 512 810

ECU V2 -4 dB -2 dB -2 dB -0 dB

ECU HPV2 -8 dB -6 dB -4 dB -2 dB

ECU V3(A) -8 dB -6 dB -4 dB -2 dB

FCU V1 -8 dB -8 dB -4 dB -4 dB

Table 24 Power reduction of the carrier units (ECU/FlexCU 1900) at antenna port

86DN0932873


Id:0900d8058064adcb

Index

AAbis connection 45Abis interface 25Abis interface configurations 11Abis link equipment 47ABISCON 45AC/DC system 40ACLK 28ACTC 42ACTM 42ACTP 42alarm collection terminal boards 42AMCO mode 50, 55, 64, 72

and MHA 37and TMA 37

antenna combining 48antenna line equipment

MHA 36TMA 36

Bbackup battery 40battery backup 40BIAS-T 78

Ccarrier unit interface 25carrier units 30

CU 30ECU 30FlexCU 31GCU 30output power level 32

CC-link 25cell configuration 10cell configuration (examples) 80COAMCO8 34

functionality 60COBA 25combiner gains

(F)DUAMCO 56DIAMCO 64MFDUAMCO 52

combiner losses(F)DUAMCO 55MFDUAMCO 52

combining modules 33, 48COAMCO8 34, 60DIAMCO 35, 63Diplexer 79DUAMCO 33, 54FDUAMCO 34, 54FICOM 39, 75FICOM6 38, 70gains DIAMCO 64HPDU 39, 77HYBRID4 35, 52MFDUAMCO 34

combining options 10configuration 10core modules 23

COBA 25COREXT 26COSA 26

core redundancy 27COREXT 26corner frequency 84COSA 26cross connect 25CU 30

output power level 32

DDC and battery controller 42DC panel (DCP) 42DCBCTRL 42DIAMCO 35

functionality 63gain 65

dimensions 12Diplexer 79double TRX mode 31dual band configurations 10dual TMA 66DUAMCO 33

functionality 54gain 56insertion loss 55specials 56

DUBIAS 78dust filter 47DUSTFILM 47

EECU 30

FCC certification 84, 85output power level 32

DN0932873 87


Id:0900d8058064adcb

emergency operation 41examples of cell configuration 80

Ffan unit 47FCC certification 1900 85FCC certification 850 84FDUAMCO 34

functionality 54gain 56insertion loss 55specials 58

FICOM 39functionality 75insertion loss 76

FICOM6 38functionality 70gain 74insertion loss 74

filterdust 47

FlexCU 31FCC certification 84, 85operation modes 31output power level 32

fourfold receive diversity mode 31frequency bands 12frequency configuration 10frequency hopping 10

Ggains

(F)DUAMCO 56DIAMCO 64MFDUAMCO 52MHA 68TMA 69

GCU 30output power level 32

HHDLC link 28hot plug-in 24HPDU 39

functionality 77insertion loss 77

HYBRID4functionality 35, 52

Iingress protection rating 12

LLE 47link equipment 47losses

(F)DUAMCO 55MFDUAMCO 52MHA 68TMA 69

MMFDUAMCO 34, 49

gain 53insertion loss 52

MHA 36min/max configuration 10MSU AC 41MSU DC 41MUCO mode 50, 55, 64, 72

and MHA 37and TMA 37

Ooutput power 32overvoltage protection and tracer 44OVPT 44

Ppower consumption 12power supply modules

AC/DC system 40alarm collection terminal boards 42battery backup 40DC and battery controller 42DC panel 42emergency operation 41MSU AC 41MSU DC 41

Rredundancy 11redundancy (core) 27releases 9remote electrical tilt 34RET 34RF output power 32RX path

gains (F)DUAMCO 56gains DIAMCO 64gains MFDUAMCO 52

Ssingle TMA 66

88DN0932873


Id:0900d8058064adcb

single TRX mode 31

Ttechnical data 12temperature range 12TMA 36traffic channels 11TRX mode (FlexCU) 31TRX per BTS 12TRX per cell 12TX path

losses (F)DUAMCO 55losses MFDUAMCO 52

Vvolume 12

Wweight 12

BS-240XL Product Description

Documents

Transcript of BS-240XL Product Description