STUPIDSID
Answer any one question from Q1 and Q2
1 (a)
Explain the phase shift method for generating SSB-SC. State its advantages and disadvantages.
6 M
1 (b)
Differentiate between NBFM and WBFM.
6 M
2 (a)
Compare between DSB-FC, DSB-SC, and SSB-SC.
6 M
2 (b)
An angle modulated wave with a carrier frequency ωc=2πX10-5 is defined by the equation, φEM(t)=10 cos (ωc t+5 sin 2000 π t). Find.
i) Power of the modulated signal
ii) Frequency deviation
iii) bandwidth
i) Power of the modulated signal
ii) Frequency deviation
iii) bandwidth
6 M
Answer any one question from Q3 and Q4
3 (a)
Explain FM detection using PLL.
6 M
3 (b)
Three resistors of 10 KΩ, 22KΩ and 33 KΩ are at room temperature (27°C). For a bandwidth of 100 kHz. Calculate the thermal noise voltage generated by:
i) Each resistor
ii) Three Resistors in series
iii) Three Resistors in parallel
i) Each resistor
ii) Three Resistors in series
iii) Three Resistors in parallel
6 M
4 (a)
Explain how a diode can be used to detect an AM signal. What are the different types of distortions that occur in a typical diode detector circuit?
6 M
4 (b)
Derive the Friss's formula for Noise Factor of amplifiers in cascade.
6 M
Answer any one question from Q5 and Q6
5 (a)
Explain the performance of Baseband system in presence of noise.
7 M
5 (b)
Explain threshold in angle modulation.
6 M
6 (a)
Explain the performance of AM in presence of noise.
8 M
6 (b)
With the help of mathematical expression explain which is superior PM/FM?
5 M
Answer any one question from Q7 and Q8
7 (a)
Explain band Limited and time limited signal.
6 M
7 (b)
What is Nyquist criterion? State sampling theorem in time domain. Draw the spectrum showing aliasing and guard band.
7 M
8 (a)
Compare between PAM, PWM and PPM.
6 M
8 (b)
With the help of block diagram, explain transmitter and receiver of pulse code modulation.
7 M
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