3.1 Introduction(main goals) To study how analog waveforms can be converted to digital waveforms. The most popular technique is called PCM To learn how to compute the spectrum for digital signals To examine how to filtering of pulse signals affects out a bility to recover the digital information at the receiver(isn To study how we can multiplex data from several digital bit streams into on high-speed digital stream fro transmission over a digital system. TDM)3 3.1 Introduction(main goals) • To study how analog waveforms can be converted to digital waveforms. The most popular technique is called PCM • To learn how to compute the spectrum for digital signals • To examine how to filtering of pulse signals affects out ability to recover the digital information at the receiver(ISI) • To study how we can multiplex data from several digital bit streams into on high-speed digital stream fro transmission over a digital system.(TDM)