STUPIDSID
1 (a)
Mention atleast four types of microphones. Explain constructional details, working,
characteristics and applications of condenser type microphone.
7 M
1 (b)
Explain constructional details and principle of working of Moving coil type loud speaker.
7 M
2 (a)
Explain the principle ofstereophonic system.
7 M
2 (b)
With reference to audio amplifier explain the difference between voltage amplifier and power amplifier. Draw the circuit diagram of typicalpush-pull amplifier and explain its working. What are the advantages of a push-pull amplifier over a single transistor
amplifier?
7 M
With reference to audio system, explain the following terms. (Any Three)
2 (c) (1)
PMPO
3 M
2 (c) (2)
Reverberation
3 M
2 (c) (3)
Directivity of a microphone
3 M
2 (c) (4)
PA system.
3 M
3 (a)
Explain the principle of magnetic recording and reproduction. What is biasing? Why AC biasing is preferredover DC biasing.
7 M
3 (b)
What do you understand by the termsPositive modulation and Negative moduion? What are the merits and demerits of negative modulatio?
7 M
3 (c)
Write a detailed note on Crossover Network.
7 M
3 (d)
Explain the need of frequency interleaving. How it is done? Why the frequency of colour sub carrier is chosen as the odd multiple of half-the-line frequency?
7 M
4 (a)
What is interlaced scanning? How it is done? What are its merits over simple
(progressive) scanning?
7 M
4 (b)
Give Reason. (1) Vertical sync pulse is serrated. (2) Pre and Post eqalizing pulses are added in the composite video signal.
7 M
4 (c)
Sketch the picture signal details of three scanning lines with different avarge brightness level and explain the following terms: (1) Peak white level (2) Black level
(3) Blanking level (4) DC level (5) Pedestal height (6) sync pulse.
7 M
4 (d)
Draw and explain the constructional details of PIL type colour picture tube. What are its merits over the Delta gun type colour picture tube?
7 M
5 (a)
Sketch the 7 Mhz. bandwidth allotted to each channel. Why VSB type of transmission is chosen over DSB or SSB type?
7 M
5 (b)
Explain the basics of Video Compression techniques.
7 M
5 (c)
What are the features of SECAM colour system? Draw and explain the block diagram of SECAM III coder. What are the merits and demerits of SECAM system?
7 M
5 (d)
Write a note on High Defination TV.
7 M
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