Reference Manual
Table Of Contents
- RBS 2206 Reference Manual
- Contents
- Preface
- Product Safety Requirements RBS 2000
- Environmental Capabilities
- Scope
- Terminology
- References
- Transport -40 C - +70 C
- Storage -25 C - +55 C
- Handling -40 C - +70 C
- Operation Indoor +5 C - +40 C
- Operation Outdoor -33 C - +40 C
- Operation Outdoor -33 C - +45 C
- Operation Outdoor -33 C - +55 C
- Operation Mast Mounted Equipment -33 C - +45 C
- Operation Mast Mounted Equipment -33 C - +55 C
- Radio Configurations, RBS 2206
- Product Data
- Unit Description, DXU-21
- Unit Description, dTRU
- Unit Decription, CDU-G and CDU-F
- Unit Description, CXU-10
- Unit Description, FCU-01
- Unit Description, DC-Filter 01
- Unit Description, PSU 1200 W
- Unit Description, ACCU/DCCU
- Unit Description, IDM
- Broadcast
- Common Control Channel Handling
- Physical Channel Handling
- Speech and Data Services
- Packet Data Services
- Call Control
- References
- Channel Activation
- Adaptive Frame Alignment
- Asynchronous Handover Detection
- RF Channel Release
- Deactivate SACCH
- Link Establish Indication
- Link Release Indication
- Link Establishment Request
- Link Release Request
- Transparent Message Transmission
- Transparent Message Reception
- SACCH Info Modify
- LAPDm
- Channel Reactivation
- Power Information
- GPRS, Physical Link Layer
- Base Station Power Control
- Channel Measurements
- Discontinuous Transmission
- Frequency Hopping
- Encryption
- Mode Modify
- Mobile Station Power Control
- Short Message Service
- Diversity Supervision
- Synchronization
- Radio Reception
- Radio Transmission
- Frequency Allocation Support
- Restart and Recovery
- Function Change
- Functionality Administration
- Operation and Maintenance Support
- References
- Concepts
- Buttons
- Change RU to Local Mode
- Change RU to Remote Mode
- Change RU to Remote Mode Cancel
- Change SW Power Boost Slave RU to Local Mode
- Loop Control
- RF Loop Test Supervision
- Calendar Time Request
- RSSI Temperature Compensation
- Max Cooling
- Fault Indicator
- BS Fault Indicator
- Operational Indicator
- Tx Not Enabled Indicator
- Local Mode Indicator
- External Alarms Indicator
- DC Disconnected Indicator
- Battery Mode Indicator
- Bat Disconnected Indicator
- AC Fault Indicator
- Test Result Indicators (not used)
- Local Mode in Progress
- Installation Data Handling
- Self Test and Supervision
- Diagnostics and Fault Handling
- Operation and Maintenance Terminal
- External Alarms
- Handling of Auxiliary Equipment
- Climate Protection
- EMC Capabilities
- Transmission Interface Handling G.703 2048 kbit/s
- Transmission Interface Handling DS1 1544 kbit/s
- Terrestrial Link Handling
- Channel Distribution Function
- Transport network O&M functions-DXX Support
- BTS Parameter Limitations
- Glossary
Unit Description, dTRU
7 Unit Description, dTRU
The dTRU (double Transceiver Unit) is a 2-TRX replaceable unit. A
TRX is a transmitter/receiver and signal processing unit which transmits
and receives one carrier. There are different versions of dTRU
depending on the frequency band and modulation method, that is only
GMSK or EDGE.
The dTRU has two transmit antenna terminals and four receive antenna
terminals. The dTRU features a built-in hybrid combiner. The hybrid
combiner can be used to combine the two transmit antenna terminals to
one common terminal.
Two of the receive antenna terminals are used for 2–branch diversity
reception. The dTRU is hardware prepared for 4–branch diversity
reception via the remaining two antenna terminals.
7.1 Block Diagram
CPU
P007395A
system
Y-link
DSP
system
RC system
Radio system
DSP
system
RC system
Radio
trans-
mitter
Hybrid
comb
TX1
RX1
TX1+TX2
HC1
RX2
RX4
RX3
HC2
TX2
Radio
receiver
Radio
receiver
Radio
trans-
mitter
TX ctrl
TX data
RX data A
RX data B
RX ctrl
RX data A
RX data B
RX ctrl
TX ctrl
TX data
Radio System
Y-link
CDU-TX ctrl bus
B
A
B
A
Figure 66 Block diagram dTRU
The TRU consists of the following main blocks:
EN/LZT 720 0008 R1A
2001-06-26
125 (421)
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