l When the distance between the antenna and the RRU/SRXU is shorter than 14 m, the RRU/
SRXU is directly connected to the antenna through the antenna jumper.
l When the distance between the antenna and the RRU/SRXU is longer than 14 m, the antenna
jumper should be shorter than 2 m. If you prepare the jumper by yourself, it is recommended
that the feeder jumper be 2 m long at most. Ensure that the antenna jumper is connected to
the feeder before being connected to the RRU/SRXU and the antenna.
Interconnect Jumper of the RRU/SRXU
The interconnect jumper transmits RF signals between two RRUs or two SRXUs.
Appearance
The interconnect jumper is 2 m long and it has a 2W2 connector at each end, as shown in Figure
2-21.
Figure 2-21 Interconnect jumper
Installation Position
The 2W2 connectors at the two ends of the interconnect jumper are linked to the ports labeled
RX_IN/OUT on two RRUs or two SRXUs respectively.
RF Jumper Connections of the RRU
One end of the RF jumper is connected to the RF ports on the RRU and the other end to the
feeder. Which RF port to use depends on the networking modes.
Table 2-18 describes the connections of the RF jumpers in different RRU networking modes.
Table 2-18 RF jumper connections of the RRU
Typical
Networking
Mode
Antenna Type and
Quantity of RRUs
Cable Connection
1 x 1 in no TX
diversity mode
l One RRU
l One dual polarization
antenna
l Two antenna jumpers
l The DIN connectors of the two feeder
jumpers link to the ANT_TX/RXA and
ANT_RXB ports at the bottom of the
RRU.
1 x 2 in no TX
diversity mode
2 x 1 in no TX
diversity mode
l Two RRUs
l Two dual polarization
antennas
l Four antenna jumpers
l The DIN connectors of the four
antenna jumpers are linked to the
RRU
User Guide 2 RRU and SRXU Hardware
Issue 01 (2008-04-18) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
2-25
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