Maharashtra State Board of Technical Education 2009 B.E Electronics & Tele-Communication Engineering Principle of communication systems - Question Paper

PRINCIPLE OF COMMUNICATION SYSTEMS

SEM six three HRS/ 80 MARKS



1. Attempt any 4 (16M)

a. List kinds of Electronic communication system. (any four)
b. Define amplitude and frequency modulation.
c. List any 4 CCIR-B standards used for TV.
d. State the function of VSB filter and diplexer in B/W TV transmitter.
e. List advantages of FAX. 4 points.
f. What is LAN? State its use and topologies.

2. Attempt any 2 (12M)

a. Draw the block diagram of B/W TV receiver and state function of every block.
b. Draw the BD of PAL colour receiver. discuss the operation of chroma part.
c. Draw pin configuration of RS 232 standards. discuss the function of TXD and RXD.

3. Attempt any 3 (12M)

a. What is PWM? Draw waveform elaborate its advantages.
b. Explain with waveforms, what is FSK?
c. Explain PCM transmitter with the help of diagram. What is quantization error?
d. Compare AM and FM. four pts.

4. Attempt any 4 (16M)

a. Draw tagged block diagram of GSM.
b. Draw BD of FAX transreceiver and state its operation.
c. Explain working of basic cellular telephone system with the help of suitable sketches.
d. Draw tagged block diagram of cordless telephone system and discuss.
e. Describe additive colour miximg with sketches.
f. What is compatibility? Draw tagged BD of Monochrome TV transmitter.

5. Attempt any 3 (12M)

a. Draw BD of FM receiver and discuss function of every block in short.
b. Describe the various tones used in telephony with sketch.
c. Describe hands-off techniques used in cellular telephony.
d. Which are the various modes of data transmission? discuss any two.

6. Attempt any 2 (12M)

a. what is MODEM? elaborate various modes of MODEM operation. How these are interconnected?
b. What is data communication topology? discuss any 1 toplogy with diagram?
c. Draw the details of vertical sync pulse at the end of odd and even field.

Earning:   Approval pending.