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BS-240
Siemens BS-240 User Manual
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Inf
ormation
Base Station System
T
echnical Description (TED:BSS)
BS-240/241
A30808-X3247-L14-2-7618
2
Table of Contents
Default Chapter
5
Table of Contents
5
1 Introduction
9
Main Features
10
Technical Data
12
Base Station System BS
12
Frequency Bands
13
2 Hardware Architecture
14
Fig. 2.1 BS-240 Indoor Cabinet and BS-241 Outdoor Cabinet (Base Racks)
14
Fig. 2.2 Functional Blocks of the BS-240/241
15
Board Redundancy
17
Ac/DC
17
Core 0
17
Fig. 2.3 Redundant Cores and Their Interfaces
17
Power Amplifier Output Level (Typical Values)
18
Rack Configuration
19
Fig. 2.4 BS-240 Base Rack and 2 Extension Racks
20
Fig. 2.5 BS-241 Base Rack and 2 Extension Racks
21
Fig. 2.6 Possible Configuration of Service1 Rack and Service2 Rack
22
Fig. 2.7 BS-240/241 Fully Equipped with 24 Carriers
23
3 Description of Modules
24
Core (COBA and COSA)
25
Fig. 3.1 Backplane Slot Configuration of Core
26
Core Basis (COBA2P8)
27
Fig. 3.2 COBA2P8 Block Diagram
27
Fig. 3.3 Structure of ACLK Function
28
Core Satellite (COSA6P16)
29
Fig. 3.4 COSA6P16 Block Diagram
29
Carrier Unit (CU)
30
Fig. 3.5 Carrier Unit Block Diagram
30
Fig. 3.6 PATRX Block Diagram
31
EDGE Carrier Unit
32
Fig. 3.7 Principal Data Flow on SIPRO
32
GMSK/8PSK Linear Modulation
33
Fig. 3.8 EPATRX and ESIPRO Function Block Diagram
34
Fig. 3.9 Data Flow in ESIPRO
36
GMSK Carrier Units (GCU)
37
Duplexer Amplifier Multi Coupler (DUAMCO)
37
DI(=2) Amplifier Multi Coupler (DIAMCO)
38
Filter Combiner (FICOM)
38
Tower Mounted Amplifier (TMA)
38
High Power Duplexer Unit (HPDU)
39
DC Panel (DCP)
39
Alarm Collection Terminal (ACT)
39
AC/DC Converter (AC/DC)
40
Fig. 3.10 Alarm Collection Terminal (ACTM and ACTP)
40
DC and Battery Controller (DCBCTRL)
41
Overvoltage Protection and Tracer (OVPT)
41
Abis Connection Module (ABISCON)
41
Abis Link Equipment (LE)
42
Cover Parts
42
Backup Battery (BATTERY)
42
Fan
43
Fig. 3.11 Example of Battery Backup Systems Connected to the AC/DC
43
Heat Exchanger (HEX)
44
4 Antenna Combiners and Receiving Paths
45
Methods of Combining
45
Typical Combiner Losses (TX Path) and Output Power Level
52
Fig. 4.2 DUAMCO 2:2
52
Fig. 4.3 DUAMCO 4:2
52
Fig. 4.4 DUAMCO 8:2
52
Fig. 4.5 FICOM 8:1
52
Fig. 4.6 DIAMCO
52
Fig. 4.7 HPDU
52
Fig. 4.8 Configuration with HPDU, DUBIAS and TMA
52
DUAMCO - DIAMCO GAIN (RX Path)
54
Parameters of Tower Mounted Amplifier (TMA)
55
Examples of Possible BTSE Configurations
57
Fig. 4.9 Multi-Cell (3,3,2): with 3 DUAMCO 4:2
57
Fig. 4.10 Multi-Cell (3,3,2): with 2 DUAMCO 4:2 and 1 DUAMCO 2:2
58
Fig. 4.11 Single-Cell (8,0,0): with FICOM and DIAMCO
58
Fig. 4.12 Single-Cell (8,0,0): with 2 DUAMCO 4:2
59
Fig. 4.13 Multi-Cell (2,2,2): with 3 DUAMCO 2:2
59
Fig. 4.14 Single-Cell (11
60
Fig. 4.14 Single-Cell (11...16,0,0): Ficoms, Diamcos and Hpdus in 2 Racks
60
Receiving Paths
61
Antenna Diversity Techniques
61
Antenna System Modules
61
Receiver Sensitivity
62
Transmission Diversity Time Delay
62
Fig. 4.15 Capacity Downlink Improvements for TX Diversity
63
Functionality
63
Fig. 4.16 BTS Rack Cabling for Transmitter Diversity Operation
64
FCC Issues (for US Market Only)
65
Maximum RF Power Output Values
66
Power Supply and Battery Backup
67
4
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Siemens BS-240 Specifications
General
Breaking capacity
6 kA
Mounting type
DIN rail
Standards
IEC 60898-1
Rated current
40 A
Number of poles
1P, 2P, 3P, 4P
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