Document Title Security Level
2006-10-04 HUAWEI Confidential Page12, Total35
Common
Subsystem
Board Functions
main contact point, and for the 4-route input of the
analog signal.
DELU
z One DELC can provide lightning protection for the
4-route E1 signal.
z There can be a maximum of three DELCs to provide
lightning protection for 12-route E1 signals.
subsystem
DSAC
z Provides the 6-route Boolean value input.
z Provides the 2-route 485 serial control bus interface.
z Supports the 2-route input of lightning protection
arrester failure alarm.
z Supports the access protection of BITS clock input.
3.2.1 Double Transceiver Subsystem
The main functions of the double transceiver subsystem are as follows:
z Baseband signals processing
z RF receive/transmit processing
z Power amplification
z Transmit diversity and 4-way receive diversity
z PBT
0 lists the boards in the double transceiver subsystem and their functions.
Boards in the double transceiver subsystem and their functions
Board Functions
DTRU
z Processes the RF and baseband signals of two carriers.
z Processes the baseband frequency hopping and RF hopping.
z Supports the enhanced functions such as PBT, transmit diversity, and
4-way receive diversity.
3.2.2 RF Subsystem
The RF subsystem comprises:
z RF antenna subsystem
z Front-end of the RF subsystem
z RF transceiver subsystem
0 lists the components of each part.
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