Typical Combiner Losses (Tx Path) And Output Power Level; Fig. 4.2 Duamco 2:2; Fig. 4.3 Duamco 4:2; Fig. 4.4 Duamco 8:2 - Siemens BS-240 Technical Description

Technical Description (TED:BSS)
BS-240/241
4.1.1
52
TX/RX
Antenna
TMA
DUBIAS
HPDU
FICOM
CU0 CU1 CU7
Fig. 4.8 Configuration with HPDU, DUBIAS and TMA
Diplexer
The Diplexer gives the possibility to use one Antenna Feeder Cable for both GSM 850,
GSM 900 and GSM 1800, GSM 1900 frequencies. One Diplexer is needed to combine
the 2 different frequencies at the BTSs side and the other one to separate the frequen-
cies 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. This is e.g., the
case where an existing GSM 900 network will be extended by a GSM 1800 or GSM 1900
network to implement a Dual Band Network.

Typical Combiner Losses (TX path) and Output Power Level

Type GSM 850, GSM 900
FICOM 2:1 2.7
FICOM 4:1 3.2
FICOM 6:1 3.7
FICOM 8:1 4.2
DUAMCO 2:2 2.5
DUAMCO 4:2 5.7
DUAMCO 8:2 8.9
HPDU 0.6
TMA * 0.4
* RX Amplification of TMA is 25.5 dB (25.0 dB for GSM 1800)
Tab. 4.1 Insertion loss of DUAMCOs, FICOMs, HPDU and TMA
RX
Antenna
TMA
DIAMCO
RX0 RX1 RX7
GSM 1800, GSM 1900
(dB)
3.7
4.2
4.6
5.8
2.5
5.7
8.9
0.75
0.6
Base Station System
(dB)
A30808-X3247-L14-2-7618
Information