1. Describe the requirement for the modulation.
2. What do you mean by amplitude modulation and modulation index?
3. Write down the difference between frequency modulation and phase modulation.
4. Write down the difference between frequency multiplier and frequency mixer.
5. Explain the principle of synchronous detection.
6. What are the advantages of phase discriminators?
7. Define sampling theorem.
8. What do you mean by multiplexing? Write down name of the two multiplexing techniques.
9. Write down the advantages of facsimile system.
10. What do you mean by compatibility of TV system?