2:45 Linear vs. Non-Linear Systems
19:55 Time-Variant vs. Time-Invariant Systems
29:05 Causal vs. Non-Causal Systems
34:55 Well-Known Types of Continuous Signals
51:20 Energy Calculations for Continuous Signals
55:00 Periodic Continuous Signals
1:04:00 Non-Periodic Continuous Signals
1:16:45 Introduction of Sampling and Discrete Signals
1:21:44 Power Calculation for Discrete Signals
1:32:30 Mixers and Amplitude Modulation
1:38:35 Channels Bandwidth and Guard Bands
How to use summation notation in Casio calculators
(from 4:40 to 5:01): https://youtu.be/bFnC6NG7LjM?t=281
