Reg No.:_ Name:

FIFTH SEMESTER B. TECH DEGREE EXAMINATION(R&S), DECEMBER 2019

Max. Marks: 100

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APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

Course Code: CS307
Course Name: DATA COMMUNICATION

PARTA
Answer all questions, each carries3 marks.

Given a receiver with an effective noise temperature of 294k and a 10 MHz
bandwidth. Find out the thermal noise level at the receiver’s output in dBW?
Define frequency, phase and wavelength of a signal

What are the advantages of optical fiber cable compared to twisted pair cable?
Explain the reflective property of a parabolic antenna?
PART ‏تا‎
‎Answer any two full questions, each carries9 marks.
If the spectrum of a channel is between 3MHz and 4 MHz and SNRg, = 24 68.
Then calculate the Shannon Channel capacity? Also find out the number of levels
required to achieve the above capacity, by using Nyquist’s formula?
Compare multimode step index fiber and multimode graded index fiber.
Explain analog and digital data transmission.
Describe briefly ground wave propagation.
Explain the different types of noise that affect the performance of a
communication system?
Give the physical description of satellite microwave communication system.

Mention some applications.

PART C
Answer all questions, each carries3 marks.
Encode the bit pattern 01001100011 using Differential Manchester encoding
technique.
Define Sampling Theorem.

What is byte interleaving technique in Time Division Multiplexing

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Duration: 3 Hours

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