Ericsson Radio Systems AB BKRC1311005-2 사용자 설명서
Ericsson Internal
DESCRIPTION
DESCRIPTION
15 ( 24 )
/ XSNJOER
174/1551-LZA 701 0001 Uen
EAB/ FJG/YP ( Louise Cederlund)
2007-06-12
A
Prepared (also subject responsible if other)
No.
Approved
Checked
Date
Rev
Reference
DC Filter
The DC filter unit is the interface for +24 V DC power supply or battery backup.
Number of units: 0–1
6.2
Optional Hardware Units
This section describes the optional RBS 2207 hardware units.
Bias injector
The bias injector is used to provide the ddTMA with DC power, from the
TMA-CM, over the RX/TX feeder cables. Six bias injectors can be connected
to one TMA-CM. The BIAS-IC is mounted outside the cabinet, as close to the
RF output as possible.
TMA-CM, over the RX/TX feeder cables. Six bias injectors can be connected
to one TMA-CM. The BIAS-IC is mounted outside the cabinet, as close to the
RF output as possible.
Number of units: 0–6
BBS
The RBS 2207 can be provided with battery backup from an external cabinet,
either a BBS 2000 or a BBS 2202 equipped with BFU-21 or BFU-22.
either a BBS 2000 or a BBS 2202 equipped with BFU-21 or BFU-22.
ddTMA - dual duplex Tower Mounted Amplifier
The ddTMA is to be mast-mounted and placed close to the antenna. It improves
the receiver sensitivity. The ddTMA saves feeder cables by duplexing RX and
TX signals to the same cable.
the receiver sensitivity. The ddTMA saves feeder cables by duplexing RX and
TX signals to the same cable.
Number of units: 0–6
TMA-CM - Tower Mounted Amplifier - Control Module
The Control Module is used to provide up to six ddTMAs with 15 V DC power
through the bias injector. It is also used to identify TMA faults and forward this
information to the alarm module in the RBS.
through the bias injector. It is also used to identify TMA faults and forward this
information to the alarm module in the RBS.
Number of units per cabinet: 0–1
RX-Splitter 01
RX-Splitter 01 distributes the receiver signals from the CDUs to the dTRU
in specific configurations of the RBS.
in specific configurations of the RBS.
Number of units per cabinet: 0–1
7
Interfaces
In this section all external and internal connections are listed, as well as the test
interface and the operator interface.
interface and the operator interface.