Antenna Feeder Subsystem; Figure 2-9 Position Of The Antenna Feeder Subsystem In The Bts System - Huawei BTS3 Series Hardware Description Manual

2 Cabinet
It performs the following functions:
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2.2.4 Antenna Feeder Subsystem

Position in the System
Figure 2-9

Figure 2-9 Position of the antenna feeder subsystem in the BTS system.

BSC
Functions
The antenna subsystem is composed of antennas, feeders, jumpers, lightning arrester, and the
TMA (optional).
It performs the following functions:
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2-12
Channel encoding and decoding, interleaving and de-interleaving
Speech encryption and decryption
Rate adaptation
Mapping between logical channel and radio channel
Signal up and down convert, sampling, filtering and amplification
shows the position of the antenna feeder subsystem in the BTS system.
External Alarm
TDU
E1
TMU
Fiber
(Optional)
TEU
PMU
PSU
FMU
Common
Subsystem
Figure 2-9 shows the system structure of the BTS30/312 when the TEU and the TES are configured. The
BTS3012A and the BTS3006A differ only in the common subsystem, as shown in
Transmitting RF signals
Receiving signals from the MS
Amplifying uplink signals
Preventing damage to the equipment by lightning current
Huawei Technologies Proprietary
M900/M1800 BTS3X Series Base Transceiver Station
CBUS/TBUS/DBUS
TRX
FHBUS
TRX
TES
TRX
PBU
Signal Processing
Hardware Description Manual
TMA
CDU
TMA
CDU
TMA
ECDU
Antenna Feeder
Subsystem
Subsystem
Issue 01 (2006-11-18)
TMA
TMA
TMA
Figure 2-7.