The document discusses key concepts for data communication including signal with DC component, complex waveform, bandwidth, digital signal properties, bit rate, bit interval, harmonics of digital signals, exact and significant spectrums, how bit rates and spectrums relate, corruption due to insufficient bandwidth, relationship between bandwidth and data rate, and provides examples.

1. Figure 4-13 My Notes for Datacom :: @nkur  Signal with DC Component

2. Figure 4-14 My Notes for Datacom :: @nkur  Complex Waveform

3. Figure 4-15 My Notes for Datacom :: @nkur  Bandwidth

4. Figure 4-16 My Notes for Datacom :: @nkur  Digital Signal

5. Figure 4-17 My Notes for Datacom :: @nkur  Amplitude, Period, and Phase for a Digital Signal

6. Figure 4-18 My Notes for Datacom :: @nkur  Bit Rate and Bit Interval

7. Figure 4-19 My Notes for Datacom :: @nkur  Harmonics of a Digital Signal

8. Figure 4-20 My Notes for Datacom :: @nkur  Exact and Significant Spectrums

9. Figure 4-21 My Notes for Datacom :: @nkur  Bit Rates and Significant Spectrums

10. Figure 4-22 My Notes for Datacom :: @nkur  Corruption Due to Insufficient Bandwidth

11. Figure 4-23 My Notes for Datacom :: @nkur  Bandwidth and Data Rate

12. Figure 4-24 My Notes for Datacom :: @nkur  Example

13. Figure 4-25 My Notes for Datacom :: @nkur  Example

14. Figure 4-26 My Notes for Datacom :: @nkur  Example