Yashwantrao Chavan Maharashtra Open University 2006 Certification TES Data Communication - Question Paper

TES073/EE/20070817
Data Communication
Time : 180 minutes Marks : 100
Instructions for the students :
1. All ques. are compulsory.
2. “Long ans kind ques. (LAQ)” is a supply kind ques. of 20 marks,
which require typical ans of about 60-80 lines in about 32-40 minutes.
3. “Short ans kind ques. (SAQ)” is a supply kind ques. of five marks,
which require typical ans of about 15-20 lines in about 08-10 minutes.
4. Use of non-programmable kind of scientific calculator is allowed.
5. Draw neat diagrams wherever necessary.
6. presume suitable data if necessary.

Long ans kind ques. (LAQ’s)
1. (a) discuss the necessity of line codes in data transmission.
State the difference kinds of line codes with a neat
waveform.
(b) With the help of suitable waveforms discuss Manchester and
AMI-RZ formats. elaborate the advantages of Manchester
format over the others.


2. (a) discuss the Hybrid coil in telephone instrument.
(b) discuss eye diagram.
(c) Write in short about SSB radio and FDM telephony.
(d) Differentiate ranging from single mode and multimode fiber.


3. (a) discuss synchronization of info from data stream.
(b) discuss TDMA Digital control channel in relation with IS-136
(TDMA) Pcs.

4. (a) discuss the subsequent terms –
i) Blocked call
ii) Rayleign fading
iii) Chipping rate
iv) Spreading gain
v) Multiplexing
(b) discuss optical couplers.

5. discuss channel allocation. 5
6. For AMPS, discuss control channels and control info. 5
7. discuss microcell. 5
8. discuss total internal reflection.

Earning:   Approval pending.