III B.Tech I Semester Supplimentary Examinations,Nov/Dec 2009 T V ENGINEERING Electronics And Communication Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) Compare the performance and complexity of the NTSC and PAL systems.
(b) What are the different types of cables and networks used in cable TV? [8+8]
ld .
2. (a) Why is the (G-Y) difference signal not chosen for transmission ? Explain how it is obtained in the receiver for modulating the corresponding beam of the picture tube. (b) What are the common faults encountered in color picture tubes?
[10+6]
or
3. (a) What do you understand by active and blanking periods in horizontal and vertical scanning? Give the periods of nominal, active and retraced intervals of horizontal and vertical scanning as used in the 625 line system. (b) Discuss about equalising pulses.
[8+8]
uW
4. (a) Explain EHT voltage generation with circuit diagram.
(b) What are the types of TV receivers? Explain the features and compare all types of TV receivers. [6+10] 5. Draw the block diagram of an IF modulated TV transmitter and briefly explain the operation. [16] 6. (a) With a diagram explain the working of plumbicon. (b) Bring out the drawbacks of plumbicon.
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(c) Suggest remedies for different problems of plumbicon.
[6+5+5]
7. (a) Define aspect ratio, contrast, brightness and resolution. (b) How is flicker eliminated by using interlaced scanning?
Aj
(c) Derive the video bandwidth requirement for 625 line system.
[4+6+6]
8. (a) Why trap circuits are added in video amplifier to attenuate frequency Spectrum occupied by FM sound signal? What is the undesired effect of sound signal in reproduced picture? (b) Discuss relative merits of cathode and grid modulation of the picture tube. Explain why cathode modulation is considered superior to grid modulation. [8+8] ?????
1
Code No: 15016
NR
Set No - 2
in
III B.Tech I Semester Supplimentary Examinations,Nov/Dec 2009 T V ENGINEERING Electronics And Communication Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
ld .
1. (a) Why trap circuits are added in video amplifier to attenuate frequency Spectrum occupied by FM sound signal? What is the undesired effect of sound signal in reproduced picture? (b) Discuss relative merits of cathode and grid modulation of the picture tube. Explain why cathode modulation is considered superior to grid modulation. [8+8]
or
2. Draw the block diagram of an IF modulated TV transmitter and briefly explain the operation. [16] 3. (a) What do you understand by active and blanking periods in horizontal and vertical scanning? Give the periods of nominal, active and retraced intervals of horizontal and vertical scanning as used in the 625 line system.
uW
(b) Discuss about equalising pulses.
[8+8]
4. (a) Why is the (G-Y) difference signal not chosen for transmission ? Explain how it is obtained in the receiver for modulating the corresponding beam of the picture tube. (b) What are the common faults encountered in color picture tubes?
[10+6]
5. (a) Define aspect ratio, contrast, brightness and resolution. (b) How is flicker eliminated by using interlaced scanning?
nt
(c) Derive the video bandwidth requirement for 625 line system.
[4+6+6]
6. (a) Compare the performance and complexity of the NTSC and PAL systems. (b) What are the different types of cables and networks used in cable TV? [8+8]
Aj
7. (a) With a diagram explain the working of plumbicon. (b) Bring out the drawbacks of plumbicon. (c) Suggest remedies for different problems of plumbicon.
[6+5+5]
8. (a) Explain EHT voltage generation with circuit diagram. (b) What are the types of TV receivers? Explain the features and compare all types of TV receivers. [6+10] ?????
2
Code No: 15016
NR
Set No - 3
in
III B.Tech I Semester Supplimentary Examinations,Nov/Dec 2009 T V ENGINEERING Electronics And Communication Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
ld .
1. (a) Why trap circuits are added in video amplifier to attenuate frequency Spectrum occupied by FM sound signal? What is the undesired effect of sound signal in reproduced picture? (b) Discuss relative merits of cathode and grid modulation of the picture tube. Explain why cathode modulation is considered superior to grid modulation. [8+8] 2. (a) Define aspect ratio, contrast, brightness and resolution.
or
(b) How is flicker eliminated by using interlaced scanning?
(c) Derive the video bandwidth requirement for 625 line system.
[4+6+6]
uW
3. (a) Why is the (G-Y) difference signal not chosen for transmission ? Explain how it is obtained in the receiver for modulating the corresponding beam of the picture tube. (b) What are the common faults encountered in color picture tubes?
[10+6]
4. (a) Explain EHT voltage generation with circuit diagram. (b) What are the types of TV receivers? Explain the features and compare all types of TV receivers. [6+10]
nt
5. (a) What do you understand by active and blanking periods in horizontal and vertical scanning? Give the periods of nominal, active and retraced intervals of horizontal and vertical scanning as used in the 625 line system. (b) Discuss about equalising pulses.
[8+8]
6. (a) Compare the performance and complexity of the NTSC and PAL systems.
Aj
(b) What are the different types of cables and networks used in cable TV? [8+8]
7. (a) With a diagram explain the working of plumbicon. (b) Bring out the drawbacks of plumbicon. (c) Suggest remedies for different problems of plumbicon.
[6+5+5]
8. Draw the block diagram of an IF modulated TV transmitter and briefly explain the operation. [16] ?????
3
Code No: 15016
NR
Set No - 4
1. (a) Explain EHT voltage generation with circuit diagram.
in
III B.Tech I Semester Supplimentary Examinations,Nov/Dec 2009 T V ENGINEERING Electronics And Communication Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
ld .
(b) What are the types of TV receivers? Explain the features and compare all types of TV receivers. [6+10] 2. (a) Define aspect ratio, contrast, brightness and resolution. (b) How is flicker eliminated by using interlaced scanning?
(c) Derive the video bandwidth requirement for 625 line system.
[4+6+6]
or
3. (a) What do you understand by active and blanking periods in horizontal and vertical scanning? Give the periods of nominal, active and retraced intervals of horizontal and vertical scanning as used in the 625 line system. (b) Discuss about equalising pulses.
[8+8]
uW
4. (a) Why trap circuits are added in video amplifier to attenuate frequency Spectrum occupied by FM sound signal? What is the undesired effect of sound signal in reproduced picture? (b) Discuss relative merits of cathode and grid modulation of the picture tube. Explain why cathode modulation is considered superior to grid modulation. [8+8] 5. (a) With a diagram explain the working of plumbicon.
nt
(b) Bring out the drawbacks of plumbicon. (c) Suggest remedies for different problems of plumbicon.
[6+5+5]
Aj
6. (a) Why is the (G-Y) difference signal not chosen for transmission ? Explain how it is obtained in the receiver for modulating the corresponding beam of the picture tube. (b) What are the common faults encountered in color picture tubes?
[10+6]
7. (a) Compare the performance and complexity of the NTSC and PAL systems. (b) What are the different types of cables and networks used in cable TV? [8+8]
8. Draw the block diagram of an IF modulated TV transmitter and briefly explain the operation. [16] ?????
8. (a) Why trap circuits are added in video amplifier to attenuate frequency Spec- · trum occupied by FM sound signal? What is the undesired effect of sound · signal in reproduced picture? (b) Discuss relative merits of cathode and grid modulation of the picture tube. Explain why cathode modulation is considered superior to ...
III B.Tech I Semester Supplimentary Examinations,Nov/Dec 2009 · MANAGERIAL ECON. ... What are the merits and limitations of Pay Back period? How does ...
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Figure 5. 7. (a) Derive the expression for potential at any point due to a point charge Q and also write electric field in rectangular co ordinate system. [8]. 3.
