STUPIDSID
1 (a)
Explain friiss transmission formula.
5 M
1 (b)
What are the energy signal and power signals.
5 M
1 (c)
Explain Ask system.
5 M
1 (d)
Compare pcm and Delta modulation.
5 M
2 (a)
Explain the operating principle, working of transmitter and receiver of BPSK system.
10 M
2 (b)
An amplitude modulated ware form has a form
Xc(t)=10 (1+0.6 Cos2000?t+0.4 Cos400?t)Cos2000?t)
(i) Sketch the amplitude spectrum of Xc(t)
(ii) Find the power content of each spectral component including currier.
(iii) Find total power and sideband power.
(iv) What is modulation index.
Xc(t)=10 (1+0.6 Cos2000?t+0.4 Cos400?t)Cos2000?t)
(i) Sketch the amplitude spectrum of Xc(t)
(ii) Find the power content of each spectral component including currier.
(iii) Find total power and sideband power.
(iv) What is modulation index.
10 M
3 (a)
What is meant by sensitivity of a radio receiver and How it is improved.
10 M
3 (b)
Find the mathematical expression of FM signal.
10 M
4 (a)
State and prove the sampling theorem for low pass and limited dignal. Explain aliasing error.
10 M
4 (b)
Explain the working of foster seeley discriminator with neat ckt diagram and phasor diagram.
10 M
5 (a)
What is meant by sensitivity of a radio receiver and How it is improved.
10 M
5 (b)
What are the advantage of QPSK system.
5 M
5 (c)
Compare analog and digital communication system.
5 M
6 (a)
What are advantage and dis-advantage of digital communication also draw block diagram of pcm and explain it.
10 M
6 (b)
Explain the following in relation of radio receiver
(i) Selectivity
(ii) Sensitivity
(iii) Double spotting.
(i) Selectivity
(ii) Sensitivity
(iii) Double spotting.
10 M
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