1. 1 Introduction o Classification of signals 3. Sampled-data signal--a discrete-time signal with a continuous-valued amplitude 4. Quantized boxcar signal-A continuous-time signal with discrete-valued amplitudes represented by a finite number of digits1.1 Introduction ⚫ Classification of signals 3. Sampled-data signal--A discrete-time signal with a continuous-valued amplitude. 4. Quantized boxcar signal—A continuous-time signal with discrete-valued amplitudes represented by a finite number of digits