A30808-X3247-L14-2-7618
57
Information
Base Station System
Technical Description (TED:BSS)
BS-240/241
The TMAs are implemented for four different frequency bands: P-GSM 900, GSM-RE
900 (RE: Railway Extension; DUAMCO 2:2 and DUAMCO 4:2), GSM 1800 and GSM
1900 (DUAMCO 2:2 and DUAMCO 4:2). The division of the GSM 900 band (39 MHz) in
two interleaved sub-bands (25 MHz each, P-GSM and GSM-RE) results from the
required filter volume for the whole band.(see Tab. 1.2)
4.1.4 Examples of possible BTSE configurations
Most frequently used configurations:
– 3/3/2 with duplex combining
– 8/0/0 with filter and duplex combining
– 2/2/2 with duplex combining
– only duplex or only filter combining is exclusively used within a cell
Fig. 4.9 Multi-cell (3,3,2): with 3 DUAMCO 4:2
Mechanical Size, W x H x D 172x280x191 mm (8"x11"x7.5")
Weight 4.25 kg (9 Lbs)
Antenna connector 7/ 16
BTS connector 7/ 16
General Supply Voltage Range +12V +/- 8%
Alarm functions alarming via sub-carrier to DUAMCO or DIAMCO
CIN is part of the combining units DUAMCO or DIAMCO and values are incorporated in the units specs.
Tab. 4.5 Parameters of 900/1800 MHz Tower Mounted Amplifier
RX TX
RX
DUAMCO 4:2
TX
CU2CU0 CU1
CELL 0
RX TX
RX
DUAMCO 4:2
TX
CU6 CU7
CELL 2
RX TX
RX
DUAMCO 4:2
TX
CU5CU3 CU4
CELL 1
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