This application report describes the software architecture and design of the Spread-Frequency Shift Keying Power Line Modem demonstration platform. Each demonstration unit consists of an eZdsp DSP developer's board plus a daughter card. The daughter card contains electronics that shape and amplify the power line communications (PLC) transmit signal, filter the PLC receive signal, handle RS-232 serial port communication, status lights, and a white LED. The intensity of the white LED may be controlled by issuing commands via the PLC or the RS-232.
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