December 17, 2011

TELEVISION ENGINEERING JNTU previous years question papers

TELEVISION ENGINEERING JNTU previous years question papers

Time: 3 hours Max. Marks.80
Answer any Five questions
All questions carry equal marks

 1. a. What is flicker? Explain how it can be eliminated in interlaced scanning.
b. What is compatibility in TV transmission? Enumerate essential quarrymen’s that make a colour system fully compatible with monochrome system. [10+6]

2. a. Explain vestigial sideband transmission used in television.
b. Discuss the merits and demerits of positive and negative modulation and justify the choice of negative modulation in most TV systems. [10+6]

3. a. Explain how Y and colour difference signals are developed from R,G,B signals.
b. Explain colour television camera system with block diagram. [8+8]

4. a. Sketch the cross-sectional view of Monochrome picture tube and explain.
b. Briefly Explain 625-B Monochrome TV standards. [10+6]

5. Draw the block diagram of Monochrome TV receiver and explain in detail.[16]

6. a. Draw the block diagram VHF tuner of TV receiver and explain.
b. Explain how channel selection is done with electronic tuning using varacter diodes. [8+8]

7. Explain PAL- D decoder with block diagram. [16]

8. a. Explain separation of vertical and horizontal sync pulses in TV receiver with circuit diagram.
b. Draw the AFC circuit and explain its operation



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