Port Location Silkscreen on the
Panel
Connector Description
OUTSIDE side FE/GE0 and FE/GE1 RJ45 connector Connecting to an
external
transmission device
3.2 RRU
This section describes the types of RRUs supported by the BTS3900C.
The RRU performs the following functions:
l Receives downlink baseband data from the BBU and sends uplink baseband data for the
communication between the BBU and the RRU.
l Receives RF signals from the antenna system, down-converts the received signals to IF
signals, amplifies the IF signals, and performs analog-to-digital conversion. The TX
channel filters downlink signals, performs digital-to-analog conversion, and up-converts
RF signals to the TX band.
l Multiplexes RX and TX signals, which enables these signals to share the same antenna
path. It also filters the RX and TX signals.
l For the RRUs with a built-in Bias Tee (BT), the built-in BT couples RF signals and OOK
signals and transmits them through the TX/RX port A. The built-in BT also supplies power
to the tower mounted amplifier (TMA).
Table 3-85 lists the types of RRUs supported by the BTS3900C. For details about these RRUs,
see the hardware description of the corresponding RRU.
Table 3-85 Types of RRUs supported by the BTS3900C
RRU Type
RRU3804 RRU3801E
RRU3908 V1 RRU3908 V2
RRU3928 RRU3808
RRU3929 RRU3942
RRU3828 RRU3829
RRU3806 RRU3926
3.3 GPS Surge Protector
The Global Positioning System (GPS) surge protector protects the satellite receiver from
lightning.
BTS3900C (Ver.C)
Hardware Description 3 BTS3900C Modules
Issue 03 (2013-05-27) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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