EC8491 Important Questions Communication Theory
EC8491 Important Questions Communication Theory Regulation 2017 Anna University free download. Communication Theory Important Questions EC8491 pdf free download.
Sample EC8491 Important Questions Communication Theory
1. What is pre envelope and complex envelope?
2. Give the advantages of VSB-AM.
3. State heterodyning principle. EC8491 Important Questions Communication Theory
Mention the advantages of modulating low frequency signal into high frequency signal.
5. List the types of AM modulators.
6. Define Coherent Detection.
7. Why do you need modulation in communication systems?
8. Identify the differences between single sideband and vestigial sideband systems. EC8491 Important Questions Communication Theory
9. Write about diagonal clipping and negative peak clipping?
Suggest a modulation scheme for broadcast video
transmission.
Apply the concepts of sensitivity and selectivity in AM
receiver. EC8491 IQ Communication Theory
Draw the AM modulated wave for over, under & 100%
modulation.
If incoming frequency is f1 and translated carrier frequency is f2, apply and find the local oscillator frequency.
14. Compare AM with DSB-SC and SSB-SC.
15. Distinguish between high level and low level modulation?
16. Differentiate between linear and non-linear modulation
17. A carrier of 20MHz is amplitude modulated with a signal frequency of 3KHz and amplitude 5Volts. If modulation index is 0.5, determine the spectra of the waveform. EC8491 Important Questions Communication Theory
18. If a 10KW amplitude modulated transmitter is modulated sinusoidally by 50%, evaluate the total RF power delivered.
19. Summarize the methods for generating SSB-SC signal.
20. Can you formulate the theory for modulation index of an AM signal and write its classification
Describe the concepts of AM modulation and derive the equation of an AM wave. Draw the phasor diagram, spectrum and modulated AM wave for various degrees of modulation index.
| Subject name | Communication Theory |
| Semester | 4 |
| Subject Code | EC8491 |
| Regulation | 2017 regulation |
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