Television Engineering - May 2012

Electronics & Telecomm. (Semester 6)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks. 1 (a) What is Chromaticity diagram? Explain it.(5 marks) 1 (b) Explain additive and subtractive colour mixing.(5 marks) 1 (c) What is colour burst? What is the importance of back porch in CVS?(5 marks) 1 (d) List types of AGC and only describe the basic operation of AGC used in TV receiver.(5 marks) 2 (a) Explain Interlaced Scanning with the help of a neat diagram also explain how it is better than Sequential scanning.(10 marks) 2 (b) Draw cross sectional view of an Image Orthicon tube and explain how it develops video signal when light focussed on its plate. List advantages of it.(10 marks) 3 (a) Draw the composite video signal for three horizontal lines and explain the various components in details.(10 marks) 3 (b) Draw near block diagram of an NTSC coder and decoder and explain thefunctioning.(10 marks) 4 (a) Compare Delta gun, PIL and Trinitron colour picture tube.(10 marks) 4 (b) Give Reasons:-
(i) Why (G-Y) is not selected for transmission?
(ii) All TV standards have odd no. of lines(10 marks) 5 (a) Draw and explain block diagram of TV transmitter system.(10 marks) 5 (b) Draw and explain a neat schematic of cable TV network. (10 marks) 6 (a) What is EIA test pattern? Draw and explain EIA pattern with its utility.(10 marks) 6 (b) Draw the neat block diagram of PAL coder and decoder and explain functioning of it.(10 marks) 7 (a) Frequency interleaving.(5 marks) 7 (b) CCTV.(5 marks) 7 (c) RTSP.(5 marks) 7 (d) Multicasting.(5 marks)