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4.1.5. Digital section
The digital section consists of a digital modem, TDD/TDMA framer, wireless MAC processor, and
system controller. These functionalities are equipped in the WT-ASIC.
The digital modem performs modulation and demodulation of transmitting and receiving burst
signals.
The TDD/TDMA framer constructs and deconstructs radio burst frames. It alse performs
scrambling, encryption, and error correction functionalities.
The wireless MAC processor converts between the Ethernet frames and the wireless MAC
frames in the radio channel.
The system controller performs operating parameter setting, state monitoring, control and testing
for the entire unit. It also communicates with the AP processer via the DMF channel.
4.1.6. Interface section
The interface section provides the physical interrfaces of Ethernet for user interface and serial
interface for the receiving level measurement terminal. It has a lightning surge protector to
protect the unit against external surges.
4.1.7. Power supply
The power supply section generates various voltages used within the unit from +24V input power.
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