Reference Manual

Radio Configurations, RBS 2106 and RBS 2206
P008526A
RX B
TDMA RBS
Co-sited
TDMA RBS
TX
dTRU Based
RBS
TX/RX TX/RX
RX A
TX RXRX
Figure 25 Separate TX and two separate RX antennas, no TMAs
If TMAs are used in the original configuration, they are replaced with
dual-duplex TMAs (ddTMAs).
P008527A
RX B
TDMA RBS
Co-sited
TDMA RBS
dTRU Based
RBS
RX A
TX RXRX TX/RXTX/RXTX
ddTMA ddTMA
TMA TMA
Figure 26 Separate TX and two separate RX antennas, with TMAs
No new antennas are required.
4.8.2 One Duplex Antenna RX/TX
The TDMA RBS may be equipped with only one TX/RX antenna. The
recommendation in this case is to add two antennas for the dTRU based
RBS. One RX signal from the dTRU based RBS is supplied to the
TDMA RBS, thus adding RX diversity to the TDMA RBS.
P008503A
RX A
TDMA RBS
TX/RX
Co-sited
TDMA RBS
TX/RX
dTRU Based
RBS
TX/RX TX/RX
Figure 27 One duplex antenna RX/TX
EN/LZT 720 0008 P2A
2001-11-28
83 (485)
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Preliminary