STUPIDSID
Attempt any four of the following:
1 (a)
What is double spotting?
5 M
1 (b)
Explain Eye pattern in detail
5 M
1 (c)
Explain under water acoustic channel
5 M
1 (d)
Explain low level modulated AM transmitter
5 M
1 (e)
Compare FDM and TDM
5 M
2 (a)
State and prove sampling theorem for low pass band limited signal
8 M
2 (b)
Explain balanced modulator using FETs
6 M
2 (c)
In an AM radio receiver the loaded Q of the antenna circuit at the input to the mixer is 100. If the intermediate frequency is 455 KHz, calculate the image frequency and its rejection at 1 MHz.
6 M
3 (a)
Explain what is meant by quantization noise. Explain in detail.
8 M
3 (b)
Find the mathematical expression of FM Signal
6 M
3 (c)
Draw block diagram of BPSK generation with waveform
6 M
4 (a)
Calculate the maximum bitrate for a channel having BW 3100 Hz and signal to noise ration 10db.
4 M
4 (b)
State and prove the following properties of Fourier transform
(i) Time Shifting
(ii) Convolution in time domain
(i) Time Shifting
(ii) Convolution in time domain
8 M
4 (c)
Explain the term:
(i) Shot noise and equivalent noise temperature
(ii) Friis transmission formula
(i) Shot noise and equivalent noise temperature
(ii) Friis transmission formula
8 M
5 (a)
Draw and explain PCM-TDM system
10 M
5 (b)
What are the disadvantages of tune RF receiver? Draw the circuit of a superheterodyne receiver and explain the same.
10 M
6 (a)
Draw neat block diagram of delta modulator and explain its working. What are the draw backs of delta modulator? How are they overcome by ADM?
8 M
Write Short notes on:
6 (b) (i)
Noise Triangle
3 M
6 (b) (ii)
Pre-emphasis and De-emphasis
3 M
6 (b) (iii)
White noise
3 M
6 (b) (iv)
Properties of line codes.
3 M
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