Categories

# EC8394 Question Bank Analog and Digital Communication

EC8394 Question Bank Analog and Digital Communication Regulation 2017 Anna University free download. Analog and Digital Communication Question Bank EC8394 pdf free download.

## Sample EC8394 Question Bank Analog and Digital Communication:

1. What is Modulation?
2. What is the use of Modulation index? EC8394 Question Bank Analog and Digital Communication
3. What are the types of Analog Modulation Techniques?
4. Define Amplitude Modulation.
5. Define Frequency Modulation.
6. Define Phase Modulation.
7. Define Angle modulation. EC8394 Question Bank Analog and Digital Communication
8. Define the modulation index for AM, FM and PM.
9. Write the mathematical expressions for Amplitude modulated wave.
10. Write the mathematical expressions for Angle modulated wave.
11. Write the mathematical expression for Frequency Modulated wave.
12. Write the mathematical expression for Phase Modulated wave.
13. What is the function of limiter in FM receiver?
14. Write the relation between carrier power and side band power of an AM-DSBFC signal. EC8394 Question Bank Analog and Digital Communication
15. In FM as the modulation index increases the required bandwidth also increases. Why?
16. What is capture effect in FM receivers? [Ans: Ability of FM to diminish the effects of
interfering signal is called capture effect.]
17. Distinguish between narrow band FM and wideband FM.
18. Draw the frequency spectrum and mention the bandwidth of AM signal.
19. Define amplitude modulation.
20. What is meant by RF?
21. What are the inputs to an amplitude modulator?
22. In an AM communications system, define modulating signal, carrier, modulated wave and
AM envelope EC8394 Question Bank Analog and Digital Communication
23. Describe the upper and lower sidebands and upper, lower side frequencies.
24. What is the highest modulation coefficient and percent modulation possible with a
conventional AM system without causing excessive distortion?
25. For 100% modulation what is the relationship between the voltage amplitudes of the side
frequencies and the carrier?
26. What effect does modulation have on the amplitude of the carrier component of the
modulated signal spectrum?
27. What does AM-DSBFC stand for? EC8394 Question Bank Analog and Digital Communication

 Subject name Analog and Digital Communication Semester 3 Subject Code EC8394 Regulation 2017 regulation