STUPIDSID
Answer the following : (Any Four )
1 (a)
Explain why FM is more immune to noise
5 M
1 (b)
What is aliasing? How can it be prevented?
5 M
1 (c)
Define Noise fator and Noise figure
5 M
1 (d)
Explain FM noise triangle
5 M
1 (e)
What is the difference between noise and inteference? Explain different types of noise
5 M
2 (a)
Derive equation for total transmitted power, total side band power ans single side band power for AM wave and draw frequency spectrum for DSBFC
10 M
2 (b)
The antena current of AM broadcast transmitter modulated to the depth of 40% by an audio sine wave is 11 Ampere. It increases to 12 Ampere as a result of simultaneous modulation by another audio sinewave. What is the modulation index due to this second wave?
10 M
3 (a)
Draw and explain Delta modulation transmitter and receiver. What is slop overload distortion?
10 M
3 (b)
Explain the following terms-
(i) Selectivity
(ii) Fidelity
(iii) Sensitivity
(iv) Double spotting
(v) Quantization
(i) Selectivity
(ii) Fidelity
(iii) Sensitivity
(iv) Double spotting
(v) Quantization
10 M
4 (a)
State and prove sampling theorem
10 M
4 (b)
Define FM and derive equation of FM wave
10 M
5 (a)
Derive the Friss formula for calculations of total noise figure for two amplifiers connected in cascade
10 M
5 (b)
Explain the operation of Foster seely discriminator with the help of circuit diagram and phasor diagram
10 M
6 (a)
Explain generation and demodulation of PAM signal with the help of suitable diagrams.
10 M
6 (b)
Draw a neat block diagram of differentiat pulse code modulation transmitter and receiver and explain the same.
10 M
Explain short note on the following :-
7 (a)
Pre-emphasis and Deemphasis
5 M
7 (b)
Primary causes of ISI
5 M
7 (c)
Adaptive delta modulation
5 M
7 (d)
AGC
5 M
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