80 Marks Sample Question Paper
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Sample Question Paper - I Course Name : Information Technology/Medical Electronics Course Code : IF/MU Semester
: Fifth
Subject
: Communication Techniques
Marks
: 80
9116 Time: 3 Hrs
Instructions: 1.
All questions are compulsory.
2. Illustrate your answers with neat sketches wherever necessary. 3. Figures to the right indicate full marks. 4. Assume suitable data if necessary. 5. Preferably, write the answers in sequential order. Q. 1. Attempt any four.
16 Marks
a. Compare AM, FM on the basis of Bandwidth requirement, waveform, noise and modulation index. b. Define Critical Frequency and Fading. c. Describe working principle of TDMA with diagram. d. Define data rate, bit rate, channel capacity and channel bandwidth. e. List applications of satellite and describe any one. f. List advantages of pulse communication over analog communication.
Q. 2. Attempt any three.
12 Marks
a. Draw the block diagram of communication system and state function of each block. b. Draw block diagram of AM transmitter. c. Explain effect of changes in atmospheric conditions on sky wave propagation. d. Define azimuth angle and elevation angle with sketch.
Q. 3. Attempt any three.
12 Marks
a. How frequency reuse and cell splitting take place in mobile communication? b. Explain the working principle of Time division multiplexing with sketch. c. Define baud rate and describe how it differs from information bit rate? d. Describe how T-lines can be used for digital transmission.
1
Q. 4 Attempt any two.
16 Marks
a. Study the input and output waveforms given below. Input waveform
Output waveform
I. Identify waveforms. II. Describe the process of generation. b. Draw and explain block diagram of cellular mobile phone system. c. Describe different analog and digital services provided by Telephone Company.
Q. 5. Attempt any three.
12 Marks
a. Define modulation and demodulation. Why it is required? b. Assume a data stream consisting of 12 bits and draw the encoded waveform using unipolar encoding technique. c. Describe Ground wave propagation. What is angle of twist? d. Describe HDB3 and B8ZS.
Q. 6. Attempt any three.
12 Marks
a. State and explain sampling theorem. b. Draw block diagram of satellite communication system. c. What is encoding? How digital data is converted to digital signal? d. Describe forward and reverse call processing.
2
: Fifth
Subject
: Communication Techniques
Marks
: 80
9116 Time: 3 Hrs
Instructions: 1.
All questions are compulsory.
2. Illustrate your answers with neat sketches wherever necessary. 3. Figures to the right indicate full marks. 4. Assume suitable data if necessary. 5. Preferably, write the answers in sequential order. Q. 1. Attempt any four.
16 Marks
a. Compare AM, FM on the basis of Bandwidth requirement, waveform, noise and modulation index. b. Define Critical Frequency and Fading. c. Describe working principle of TDMA with diagram. d. Define data rate, bit rate, channel capacity and channel bandwidth. e. List applications of satellite and describe any one. f. List advantages of pulse communication over analog communication.
Q. 2. Attempt any three.
12 Marks
a. Draw the block diagram of communication system and state function of each block. b. Draw block diagram of AM transmitter. c. Explain effect of changes in atmospheric conditions on sky wave propagation. d. Define azimuth angle and elevation angle with sketch.
Q. 3. Attempt any three.
12 Marks
a. How frequency reuse and cell splitting take place in mobile communication? b. Explain the working principle of Time division multiplexing with sketch. c. Define baud rate and describe how it differs from information bit rate? d. Describe how T-lines can be used for digital transmission.
1
Q. 4 Attempt any two.
16 Marks
a. Study the input and output waveforms given below. Input waveform
Output waveform
I. Identify waveforms. II. Describe the process of generation. b. Draw and explain block diagram of cellular mobile phone system. c. Describe different analog and digital services provided by Telephone Company.
Q. 5. Attempt any three.
12 Marks
a. Define modulation and demodulation. Why it is required? b. Assume a data stream consisting of 12 bits and draw the encoded waveform using unipolar encoding technique. c. Describe Ground wave propagation. What is angle of twist? d. Describe HDB3 and B8ZS.
Q. 6. Attempt any three.
12 Marks
a. State and explain sampling theorem. b. Draw block diagram of satellite communication system. c. What is encoding? How digital data is converted to digital signal? d. Describe forward and reverse call processing.
2
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