1

Sample Question Paper – I

Course Name : Electronics Engineering Group

Course Code : ET/EJ/EN/EX/DE/ED/EI

Semester : Fifth for ET/EJ/EN/EX/DE and Sixth for ED/EI

Subject : Audio and Video Engineering

Marks : 80 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

a. Draw circuit diagram of three way cross over network & explain it

operation in brief.

b. State the principle of pick up assembly in CD player with diagram.

c. What is flicker effect in TV & how it is over come?

d. Draw the diagram of Yagi Uda Antenna with its radiation pattern.

e. List the types of Amplifier used in cable TV Network & explain any one

of it.

f. Draw the block diagram of PAL-D Receiver.

16 Marks

Q.2 Attempt any THREE

a. Draw & explain the block diagram of LNBC.

b. How NTSC system differ from PAL system?

c. Draw the block diagram of colour TV transmitter.

d. What is the need of pre-equaling & post-equaling pulse in CVS?

12 Marks

Q.3 Attempt any THREE

a. Draw & explain the block diagram of DTH system.

b. Why the cathode voltage is positive in TV receiver?

c. Explain different controls used in Hi-Fi Amplifier.

d. Give the different components used in CD player & explain one of it.

12 Marks

9124

2

Q.4 Attempt any TWO

a. How High Voltage is generated by EHT circuit in colour TV receiver?

b. With neat block diagram explain PAL-D decoder.

c. Draw the block diagram of black & white TV receiver & explain each

block in brief.

16 Marks

Q.5 Attempt any THREE

a. Draw & explain the diagram of PIL picture tube.

b. What is compatibility & how it can be archived?

c. Justify the choice of a rectangular frame with to height ratio equal to 4/3

of TV.

d. Justify the choice of 625 lines for TV transmission. Why is the total

number of lines kept odd in all TV system?

12 Marks

Q.6 Attempt any THREE

a. Why vertical sync pulses are notched?

b. What are sync pulses & blanking pulses? Describe used of these pulses

in TV.

c. Why FM is used for sound & AM is used for picture in TV system.

d. What are the 4 bands & their frequencies where boosting is done in

Dolby A system?

12 Marks