Annamalai University 2008-3rd Year B.Sc Electronics " 730ELECTRONIC COMMUNICATION " (-VI) (PART-III A-MAIN) 5257 - Question Paper
B.Sc. DEGREE EXAMINATION, 2008
(ELECTRONIC SCIENCE)
(THIRD YEAR)
(PART-III A-MAIN)
(PAPER-VI)
730. ELECTRONIC COMMUNICATION
(Including Lateral Entry)
Dec) (Time: three Hours
Maximum: 100 Marks
SECTION-A (5×4=20)
ans any 5 ques.
All ques. carry equal marks
1. Write a note on Square legal regulations Modulation.
2. Explain the direct method of F.M.
3. Explain the function of straight receivers in A.M.
4. How is characteristic impedance calculated?
5. What are Dipole Arrays?
2
6. What do you mean by Critical Frequency?
7. Explains the Transformer-Coupled Transmission Bridge.
8. Why is Crossbar Switching preferable than Step by Step Switching? Justify.
SECTION-B (5×16=80)
ans any 5 ques.
All ques. carry equal marks
9. Explain Linear Modulation and Grid Bias modulation in A.M.
10. Prove that the phase discriminator is an FM Demodulator.
11. Explain the performance of FM receiver with necessary diagrams.
12. Write short notes on a) Yagi Antenna
b) Rhombic Antenna. (8+8)
13. Explain the ionosphere and its effects in sky wave propagation.
14. Explain the principle and working of Antennas in Space.
15. Describe every of the BORSCHT functions of Subscriber Line Interface Circuit.
16. What is telegraphy? define the system and machines used for transmitting and receiving telegraph.
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Register Number: 5257
Name of the Candidate:
B.Sc. Degree Examination, 2008
(ELECTRONIC SCIENCE)
(THIRD YEAR)
(PART-III A-MAIN)
(PAPER-VI)
730. ELECTRONIC COMMUNICATION
(Including Lateral Entry)
Dec) (Time: 3 Hours
Maximum: 100 Marks
SECTION-A (54=20)
Answer any Five Questions
All Questions carry equal marks
1. Write a note on Square Law Modulation.
2. Explain the direct method of F.M.
3. Explain the function of straight receivers in A.M.
4. How is characteristic impedance calculated?
5. What are Dipole Arrays?
2
6. What do you mean by Critical Frequency?
7. Explains the Transformer-Coupled Transmission Bridge.
8. Why is Crossbar Switching preferable than Step by Step Switching? Justify.
SECTION-B (516=80)
Answer any Five Questions
All Questions carry equal marks
9. Explain Linear Modulation and Grid Bias modulation in A.M.
10. Prove that the phase discriminator is an FM Demodulator.
11. Explain the performance of FM receiver with necessary diagrams.
12. Write short notes on a) Yagi Antenna
b) Rhombic Antenna. (8+8)
13. Explain the ionosphere and its effects in sky wave propagation.
14. Explain the principle and working of Antennas in Space.
15. Describe each of the BORSCHT functions of Subscriber Line Interface Circuit.
3
16. What is telegraphy? Describe the system and machines used for transmitting and receiving telegraph.
======
| Earning: Approval pending. |
