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Friday, March 18, 2016

MSBTE, Diploma IT, Communication Technology Model Question Paper

Maharashtra State Board of Technical Education, Mumbai Old Question Papers / Previous Question Papers / Sample Question Papers / Model Question Paper
MSBTE Question Paper
Scheme – G
Sample Test Paper - I
Course Name: Diploma in Information Technology
Course Code : IF
Semester : Fifth
Subject Title : Communication Technology
Marks : 25 Time: 1 hour
Instructions:
1. All questions are compulsory
2. Illustrate your answers with neat sketches wherever necessary
3. Figures to the right indicate full marks
4. Assume suitable data if necessary
5. Preferably, write the answers in sequential order
Q1. Attempt any THREE 09
a) Define noise and state its effects.
b) State the reasons for which pulse modulation is preferred over amplitude modulation.
c) Draw the block diagram of superhetrodyne AM radio receiver.
d) Compare natural and flat top sampling.(any three points)
Q2. Attempt any TWO 08
a) Draw the block diagram of FM transmitter .Describe the function of each block.
b) Which errors can occur in delta modulation? Which circuit is used to overcome this? Draw the same.
c) Compare PAM and PPM .(any four points)
Q3. Attempt any TWO 08
a. Compare AM, FM with respect to
1) Waveform
2) Bandwidth
3) Modulation index
4) Noise immunity
b. Define wave propagation .Describe ground wave propagation with neat diagram.
c. Draw the block diagram of PAM generation and describe its working.

Scheme – G
Sample Test Paper - II
Course Name: Diploma in Information Technology
Course Code : IF
Semester : Fifth
Subject Title : Communication Technology
Marks : 25 Time: 1 hour
Instructions:
1. All questions are compulsory
2. Illustrate your answers with neat sketches wherever necessary
3. Figures to the right indicate full marks
4. Assume suitable data if necessary
5. Preferably, write the answers in sequential order
Q1. Attempt any THREE 09 Marks
a) Define ASK, FSK and PSK.
b) State any three frequency bands used for satellite communication system with frequency range.
c) State the working concept of CDMA. State any two advantages of it over TDMA and FDMA.
d) Define bit rate and baud rate. Give bit rate and baud rate for FSK and QPSK.
Q2. Attempt any TWO 08 Marks
a) Draw the block diagram for BPSK generation .State its working principle.
b) State the sequential steps for handset to handset call procedure in mobile communication.
c) Describe the concept of WDM in brief with the help of block diagram.
Q3. Attempt any TWO 08 Marks
a) Write the working principle of satellite communication with the help of basic block diagram.
b) Describe FDM with suitable block diagram.
c) Define the concept of 1) frequency reuse
2) cell splitting used in mobile communication.

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