This simulation illustrates the sampling and quantization stages of Pulse Code Modulation (PCM). The green waveform is the analog input signal, the blue waveform is the sampling clock that triggers measurement of the input, and the red waveform is the quantized staircase output representing the sampled values. The binary form of each sample is shown on the 7-segment display. While this demonstrates the core steps of PCM conversion, it does not display the actual serial PCM bitstream, which would