STUPIDSID
Solve any Five:
1 (a)
Modulation index for AM should be less than one. Justify/Contradict.
4 M
1 (b)
Distinguish between narrow band FM and wideband FM.
4 M
1 (c)
Define noise figure and signal to noise ratio.
4 M
1 (d)
Explain double spotting with reference to radio receiver.
4 M
1 (e)
Explain aliasing error and aperture effect.
4 M
1 (f)
List the application of pulse communication.
4 M
2 (a)
Explain low level and high level modulation techniques with the help of diagram.
10 M
2 (b)
Explain Partical diode detector with delayed AGC in detail.
10 M
3 (a)
Explain the principle and working of transistor direct PM Modulator.
10 M
3 (b)
With suitable diagram, explain the working of stabilized reactance modulator.
10 M
4 (a)
Explain independent sideband receive in detail.
10 M
4 (b)
For a receiver with IF and RF frequencies of 455 KHz and 900 KHz respectively Determine:
i) The Local Oscillator frequency
ii) Image frequency
iii) Image rejection ratio for a pre-selector Q of 80.
i) The Local Oscillator frequency
ii) Image frequency
iii) Image rejection ratio for a pre-selector Q of 80.
10 M
5 (a)
Explain Pulse Code Modulator and demodulator using neat diagram.
10 M
5 (b)
What are the drawbacks of delta modulation. Explain the method to overcome these drawbacks.
10 M
6 (a)
Draw the FDM system to combine three voice channels. Each voice channel occupies a bandwidth of 4 KHz. The common voice channel has a bandwidth of 12 KHz from 100 KHz to 112 Khz.
10 M
6 (b)
Classify and explain different types of noise affecting communication.
10 M
More question papers from Analog Communication