Download PTU B.Tech 2020 March ECE 4th Sem BTEC 401 Analog Communication Systems Question Paper

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Roll No. [T TTTTTT] [ ] Total No. of Pages : 02

Total No. of Questions : 09

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B.Tech. (ECE) (2012 to 2017)/(Electronics & Telecomm. Engg.)

(Sem.-4)

ANALOG COMMUNICATION SYSTEMS

Subject Code : BTEC-401

M.Code : 57593

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Time : 3 Hrs. Max. Marks : 60

INSTRUCTION TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

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SECTION-A

1. Answer briefly :
   1. Discuss the analog communication system with neat diagram.
   2. Define noise and noise factor.
   3. Discuss tracking and alignment in AM reception.
   4. Discuss the AM receiver using phase locked loop.

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   5. What do you mean by balanced modulator?
   6. What is selectivity in AM reception?
   7. Define modulation and demodulation.
   8. Discuss square law modulation.
   9. What do you mean by SSB system?

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   10. Discuss the concept of pulse position modulation.

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SECTION-B

2. Explain how the phase modulation is obtained from the frequency modulation.

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3. Give a fair Comparison between AM and FM.
4. Write a short note on receiver parameters.
5. Discuss the frequency modulator with diagram.
6. Explain the AM receiver characteristics.

SECTION-C

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7. Discuss the generation of SSB transition with their three different methods.
8. Write a note on multiplicative mixer using dual gate MOSFET with diagram.
9. Discuss the different elements of communication system with block diagram.

NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.

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