PTU B.Tech Automation Robotics Engineering ECE 5th Semester May 2019 70481 COMMUNICATION SYSTEM Question Papers

FirstRanker.com

Roll No.

Total No. of Pages : 02

--- Content provided by⁠ FirstRanker.com ---

Total No. of Questions : 09

B.Tech. (Automation & Robotics) (2011 & Onwards)/

B.Tech. (Electronics & Electrical) (2011 onwards)/

B.Tech. (Electronics & Electrical) (2013 Onwards)

(Sem.-5)

--- Content provided by⁠ FirstRanker.com ---

COMMUNICATION SYSTEM

Subject Code : BTEEE-501

M.Code : 70481

Time : 3 Hrs. Max. Marks : 60

INSTRUCTION TO CANDIDATES :

--- Content provided by‌ FirstRanker.com ---

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.

SECTION-A

1. Answer briefly :
   1. Sampling

   --- Content provided by⁠ FirstRanker.com ---

   2. Noise figure
   3. Synchronous and asynchronous modulation
   4. FM broadcast transmitter
   5. Image rejection
   6. TRF receiver

   --- Content provided by‍ FirstRanker.com ---

   7. Hoffman code
   8. Modems
   9. PCM
   10. FSK

--- Content provided by‌ FirstRanker.com ---

SECTION-B

1. Define modulation. Describe various modulation systems.
2. An angle modulated signal with carrier frequency ?_c =2px10⁶ is described by the equation:
   @iy (1) =10cos (?_ct+5sin3000t +10sin 2000pt)
   1. Find the power of the modulated signal.
   2. Find the frequency deviation.

   --- Content provided by⁠ FirstRanker.com ---

   3. Calculate the deviation ratio.
3. Explain the directional capability of data exchange.
4. Describe low level and high level AM transmitter with the help of suitable diagrams.
5. Explain the principle and working of super heterodyne receiver.

--- Content provided by‍ FirstRanker.com ---

SECTION-C

1. What do you mean by multiplexing? Describe various data multiplexing techniques in detail.
2. Write a note on SSB transmitter and receiver.
3. Explain various elements of communication systems in detail.

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.

--- Content provided by FirstRanker.com ---