Reference Manual

Table Of Contents
Radio Congurations, RBS 2206
Figure 3 An example of an RBS 2000 servicing a three-cell site
4.1.2 Radio Base Station
The Radio Base Station 2000 (RBS 2000) is Ericssons second
generation of RBSs developed to meet the GSM specications for BTSs.
4.2 References
/GSM:05.05/ GSM Requirements 05.05 phase 2+ Radio
Transmission and Reception.
/GSM:05.08/ GSM Requirements 05.08 phase 2+ Radio
Subsystem Link Control.
4.3 Denitions
Tower Mounted Amplier (TMA)
The TMA compensates for signal loss in the receiver antenna cables,
reduces system noise and improves uplink sensitivity. The TMA can
consist of a duplex lter. Duplex is the function that allows
communication in two directions (sending and receiving) on one
channel.
The TMA used for 12 TRX products is Dual Duplex TMA (ddTMA).
Antenna Reference Point
The antenna reference point is the point where the radio signal crosses
the RBS border, that is, the connector for the antenna feeder. See the
gure below.
Note: The TMA is inside the RBS border.
32 (421)
EN/LZT 720 0008 R1A
2001-06-26
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