20 Marks Sample Test Paper

Sample Test Paper - I Course Name : Information Technology/Medical Electronics Course Code : IF/MU Semester

: Fifth

Subject

: Communication Techniques

Marks

: 20

9116 Time:1 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 two.

08 Marks

a. Draw block diagram of super heterodyne receiver and describe the functionality of IF amplifier. b. Define skip and Maximum usable frequency. c. What is meant by Nyquist Rate in Sampling? What is the standard sampling frequency for speech signal? Q.2. Attempt any three.

12 Marks

a. Define modulation index for AM and FM. b. Define the term power density and explain why it is inversely proportional to the square of the distance from the source? c. Draw the block diagram of digital communication system. d. What is quantization noise? Show how it depends on the step size?

1

Sample Test Paper - II Course Name : Information Technology/Medical Electronics Course Code : IF/MU Semester

: Fifth

Subject

: Communication Techniques

Marks

: 20

9116 Time:1 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 two. 08 Marks a. Represent the data 10110100 using the following data formats with the help of neat diagram. i.

RZ

ii.

NRZ

b. List frequency bands used in satellite communication. c. Define Baud rate and bit rate.

Q.2. Attempt any three.

12 Marks

a. What are the types of digital-to-digital encoding? How encoding differs from modulation? b. Define orbits of satellite with sketch. c. Describe the multiplexing hierarchies of Digital Communication. d. Draw the block diagram of satellite communication.

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