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Figure 25
If TMAs are used in the original configuration, they are replaced with
dual-duplex TMAs (ddTMAs).
Figure 26
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.
Figure 27
EN/LZT 720 0008
P2A
2001-11-28
Radio Configurations, RBS 2106 and RBS 2206
TX
RX
RX
TDMA RBS
Separate TX and two separate RX antennas, no TMAs
TX
RX
RX
TDMA RBS
Separate TX and two separate RX antennas, with TMAs
TX/RX
TDMA RBS
One duplex antenna RX/TX
© Ericsson Radio Systems AB
— All Rights Reserved —
TX
TX/RX TX/RX
Co-sited
dTRU Based
RX A
TDMA RBS
RX B
TX
TX/RX
Co-sited
dTRU Based
RX A
TDMA RBS
RX B
TX/RX
TX/RX TX/RX
Co-sited
dTRU Based
TDMA RBS
RX A
RBS
P008526A
TX/RX
RBS
P008527A
RBS
P008503A
83 (485)
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