Zte ZXC10 BTSB I1, Installation Manual

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ZXC10 BTSB (V1.0) cdma2000 Base Transceiver Station Installation Manual
12-2
baseband system at the wireline side. The RFS consists of the following boards:
The TRX implements signal frequency conversion and supports 6+1 backup.
The RMM provides interface between RF and baseband and can run in active/standby
mode.
The PA amplifies the power of forward signals and supports 6+1 backup for linear
power amplification.
The PIM provides interface for power amplification.
The RFE provides antenna feeder interface and reverse low noise amplification.
The BTM performs base station radio tests.
The SAM monitors the environment.
The TSM implements cross-OR operation on the TRX forward signals for backup.
The RSM implements cross-AND operation on the TRX reverse signals for backup.
The PD distributes the power.
12.2 RF Cabinet Boards
12.2.1 Receiver Front End (RFE)
The RFE module amplifies the reverse received signals with low noise, implements
detachment, filter, SWR and power check for received/sent signals, and extracts &
injects the BTM. Its performance has a direct impact on the transmission indices of the
whole BTSB system.
The system requires a single cabinet to provide 24-carrier/sector. To this end, linear
power amplifiers with 4-carrier are configured for the base station in most cases, and
single-carrier higher-power amplifiers are adopted in special cases. The RFE is
designed to adapt to all the possible configurations of the system, including the
single-rack 6-sector configuration.
The principles and functions of the RFE are as follows:
Integrate duplexer (DUP) and filter (DIV) into one box. Then each RFE consists of 5
modules of 4 types (DUP, DIV, 2XLNA and PVD) to bear 4-carrier forward signals and
two channels of reverse signals.