FPGA is used as interface between the DSP and the encoder, pulsecommand and power module. The latest intelligent power module (IPM) is used to provide the function of power stage.
Design requirements: (1) can output sawtooth, triangle wave, sine wave, pulse wave. (2) according to the keyboard command to switch between waveforms. (3) can adjust the output waveform frequency.
The Pulse property contains the command string used to instruct the modem to use pulse mode for dialing. Pulse dialing is necessary for phone lines that are unable to handle tone dialing. Example: P.