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[QUOTE=hemalathaijt;200512][B]Name of the organisation  [/B]: Rawal Institute Of Engineering And Technology (riet.in)
[B]Description  [/B]: Model Question Paper

[B]Model Question List  [/B]: [URL]http://www.riet.in/index.php?option=com_content&view=article&id=31&Itemid=78[/URL]
[B]Model Question Paper  [/B]: [URL]http://www.riet.in/images/Mdel_paper_PDF/cs-pcs-iv.pdf[/URL]

B.Tech. 4th Semester(ECE &EE)
Model Test Paper
Subject-CS/PCS
[B]Paper [/B]: (EE-206-F)/EE-210-F)
[B]Time [/B]: 3 Hr. Maximum Marks: 100
[B]Note [/B]: Question No. 1 is compulsory. All questions carry equal marks. Attempt at least one question from Sections A, B, C, D.

Q1 (a) what is difference between analog and digital Communication? (2*10)
(b) Define Nyquist Rate?
(c) What are the different types of communication modes?
(d) What is modulation?
(e) Define Frequency Division Multiplexing?
(f) What do you mean by Multiplexing?
(g) What is the channel capacity of PCM system?
(h) Define SNR?
(i) What is noise figure?
(j) Define Modulation Index?

SECTION A
Q2 (a) Draw the block diagram of a communication system? Explain with suitable block diagram? (10)
(b) What is Multiplexing? And explain the classification of multiplexing? (10)

Q3 (a) State and proof the various properties of Fourier Transform. (10)
(b) What is signal? Explain the various types of signals? (10)

SECTION B
Q4 (a) what do you mean by Amplitude Modulation? Explain with its Modulation and Demodulation process? (10)
(b) What is FM? Explain the various types of FM? (10)

Q5 (a) what is DSB-SC? Explain the generation of DSB-SC waves? (10)
(b) What is the difference between AM, FM (10)

SECTION C
Q6 (a) what is PAM? Explain with its Modulation and demodulation process? Also write advantages and disadvantages of PAM? (10)
(b) What is sampling? Derive the expression of Sampling Theorem? (10)
Q7 (a) what is PCM? Explain with its Modulation and demodulation process? Also write advantages and disadvantages of PCM (10)
(b) What is the difference between PAM, PCM and PPM? (5)
(c) Encode the Binary data (10101101) into NRZ, NRZ-I, NRZ –L, Manchester and differential Manchester? (5)

SECTION D
Q8 Write short note on: (2*10)
(a) Differentiate ASK, PSK, FSK.
(b) Internal Noise.

Q9 (a) what is Noise? Explain the various types of Noise. (10)
(b) What is BPSK? Explain briefly? (10)[/QUOTE]

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