STUPIDSID
Attempt any four questions:-
1 (a)
Explain in brief:
i) Signal to noise ratio
ii) Noise figure
i) Signal to noise ratio
ii) Noise figure
5 M
1 (b)
Discuss general telemetry system.
5 M
1 (c)
With neat block diagram explain the operation of Basic communication system.
5 M
1 (d)
Compare TDM and FDM.
5 M
1 (e)
Derive Friis formula.
5 M
2 (a)
Define AM and explain High Level Collector Modulator along wiht circuit diagram and waveform.
10 M
2 (b)
The antenna current of an AM broadcast transmitter modulated to a depth 40% by an audio sine wave is 11A. It increases to 12A as a result of simultaneous modulation by another audio sine wave. What is modulation index due to second wave.
10 M
3 (a)
Explain any one method of F.M. generation.
10 M
3 (b)
In FM broadcasting, What should be the maximum frequency deviation? Who has laid down this constraint? How bandwidth requirement of FM wave are calculate? Explain Carson's rule.
10 M
4 (a)
What is pulse amplitude modulation? Explain modulation and demodulation process.
10 M
4 (b)
Explain, why it is essential to use radio frequency (RF) telemetry. Describe it with some relevant example.
10 M
Explain briefly:
5 (a) (i)
Amplitude shift keying (ASK).
5 M
5 (a) (ii)
Frequency shift keying (FSK).
5 M
5 (b)
Explain with a neat block diagram Delta modulation transmitter and receiver system.
10 M
Write short notes on any four:
6 (a)
PCM transmitter system.
5 M
6 (b)
OSI reference model.
5 M
6 (c)
Modes of communication.
5 M
6 (d)
Practical diode detector.
5 M
6 (e)
Superheterodyne receiver.
5 M
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