Product Info

RX Splitter Chapter 11: RX Splitter R eplacement Procedure
RX Splitter
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RX Splitter Description
The RX splitter is only used in UBS Macro BTS frames equipped with more than one XMI.
The RX splitter used in the UBS Macro BTS frame is wide band and handles either 1.9 GHz or
800 MHz RX signals.
The RX splitter is a passive device requiring no DC input operating power .
F or the RX splitter location in the UBS Macro frame, refer to Figure 1 -3 UBS Macro BTS
mid -capacity frame (1800 mm rack) on page 1 - 30 .
Figure 1 -14 RX splitter front panel detail on page 1 - 44 shows the location of the RX splitter RF
I/O port connectors.
The XMI RX expansion ports (EXP OUT and EXP IN) are connected to the RX splitter .
Currently , UBS Macro BTS frames do not support XMI 3 and XMI 4. These will be
supported in the future.
In frames equipped with an RX splitter , XMI 1 provides RX main RF antenna signal outputs for
each sector to the RX splitter and XMI 2 provides RX diversity RF antenna signal outputs
for each sector to the RX splitter . The RX splitter splits the RX main RF antenna signals into
outputs to XMI 2, XMI 3 and XMI 4. The RX splitter splits the RX diversity RF antenna signals
into outputs to XMI 1, XMI 3 and XMI 4.
The RX splitter XMI 3 and XMI 4 EXP OUT and EXP IN connectors are not currently used.
System impact/considerations
P erforming this replacement procedure will not cause BTS downtime or suspend
any call processing.
Receive diversity on all sectors will be interrupted during the procedure.
TX RF output power on each sector is not affected.
Because the RX splitter is completely passive, the likelihood of its failure is minimal.
11 -2 68P09283A64 -3
FOA SEP 2007