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00000CS307121902

PART C
Answer all questions, each carries 3 marks.
Differentiate between NRZL and NRZI encoding techniques with examples.
Four 1-kbps connections are multiplexed together. A unit is 1 bit. Find
(a) The duration of 1 bit before multiplexing,
(b) The transmission rate of the link,
(c) The duration of a time slot.
Explain the various steps involved in Pulse Code Modulation.
Write short note on CDMA.
PART 0
Answer any two full questions, each carries 9 marks.
We have an available bandwidth of 100 kHz which spans from 200 to 300
kHz. What are the carrier frequency and the bit rate if we modulated our data
by using ASK with d = 1?
Explain SONET frame format?
Draw the Manchester and Differential Manchester encoding schemes for the
data 01001100011.
Write the importance of Digital carrier system.
A multiplexer combines four 100-kbps channels using a time slot of 2 bits.
Show the output with four arbitrary inputs. What is the frame rate? What is the
frame duration? What is the bit rate? What is the bit duration?
What is the total bandwidth required for frequency modulation. Explain with
neat sketch.
PART E
Answer any four full questions, each carries 10 marks.
Compare the characteristics of Synchronous and Asynchronous transmission.
The data to be transmitted is given below. If it is send with odd parity, what
will be the parity bit generated?
a) 11010
b) 000000
c) 01010000
d) 11111
e) 0000110
Using CRC, given the data word 100100 and the divisor is 1101

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