SRM University 2007 B.Tech Computer Science and Engineering BANK : Communication Engineering - Question Paper

9. What is TRF receiver?
10. Write the advantages of TRF receiver.
11. Write the limitations of TRF receiver.
12. Define Selectivity.
13. Define Fidelity.
14. Define Super-heterodyne receiver.
15. What is intermediate frequency?
16. Define Sensitivity.
17. What is the function of mixer in super-heterodyne receiver?
18. What is the fixed value of IF in AM receiver?
19. Write the advantages of using Super-heterodyne receiver.
20. What is meant by Synchronous detection?
21. Draw the Envelope detector circuit diagram.
22. What is the effect of Phase fault in Synchronous detection of DSB-SC & SSB signals?
23. What are the kinds of AM receiver?
24. What is low power level AM transmitter?
25. What is high power level AM transmitter?
26. What is the difference ranging from TRF & Super-heterodyne receiver?
27. Define Multiplexing.
28. Define FDM.
29. Give the applications of FDM.
30. What is frequency drift & frequency scintillation?

PART B
1. Explain the detection of amplitude modulated signal using envelope detector circuit.
2. Explain synchronous detection of DSB-SC wave & explain about the effect of phase & frequency fault.
3. Explain synchronization techniques for the detection of DSB-SC & SSB.
4. Explain about low level AM transmitter.
5. Explain about high level AM transmitter.
6. Explain synchronization technique for the detection of VSB.
7. Explain TRF receiver with a neat diagram.
8. Explain Super-heterodyne receiver with a neat diagram.
9. Explain frequency division multiplexing in detail.

UNIT 3
PART A
1. Define FM and PM.
2. How FM is modulated.
3. What is the function of discriminator?
4. What is meant by diversity reception?
5. What is the difference ranging from FM and AM receivers.
6. What the drawbacks of slope detector
7. How does Ratio detector differ from foster seely discriminator?
8. What is the use of limiter in FM receivers
9. What is IF of AM and FM system.
10. Define Super heterodyne principle.
11. What is the function of Pre-emphasis in FM transmitter and De-emphasis in an FM transmitter?
12. Difference ranging from modulation index and deviation ratio.
13. Define double super heterodyne principle.
14. What is AFC?
15. Write the relationship ranging from FM and PM.
16. Write the difference ranging from narrow band FM and wide band FM.
17. Define frequency sensitivity.
18. Draw the phasor diagram of narrow band FM.
19. Define figure of merit.
20. Define capture effect in FM.

Earning:   Approval pending.