Sunday, April 28, 2013

Anna University Examinations May / June Important Questions 2013 Anna univ Important Questions

Anna University Examinations May / June Important Questions 2013 - Anna Univ Important Questions

Anna University Important Questions For May June 2013 Exams, this Will be the Most Aspiring Search throughout May and June 2013 Month

History of Anna Univ Important Questions ? Who initiated ?

Full Credits Goes To For initiating " Important Questions " In the Year 2011 For Anna Univ Students 

We are the pioneer In Providing Important Questions For Anna University Exams For All Engineering Students From the year 2011 [ (i.e) Our First Post Regarding Important Questions Is On 03/11/2011 For Nov/Dec 2011 Anna Univ Examinations ], After Some sort of days Many Websites Copied, Followed and provided the same For students ,  We Are proud and Happy to Hear that When Students Pronounce  Like 

" Anna University rejinpaul "
" rejinpaul Important Questions "

We Continuously Monitor Anna university Students need and we will react Accordingly , We Are Happy To Announce That Our team Working On May / June 2013 Anna Univ Exam Important Questions , Same Will be Posted Instantly In , So keep Watching Us

We Plan To Start Publish Important Questions by First Week  May 2013

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Principles Of Communication Question Paper for Anna Univ IT Department

Third Semester 
Information Technology 
(Regulation 2008) 
Time : Three hours Maximum : 100 Marks 
Answer ALL Questions 
PART A — (10 × 2 = 20 Marks) 
1. Define amplitude modulation. 
2. What is modulation index? 
3. Why is ASK called as ON-OFF keying? 
4. What are the differences between QASK and QPSK? 
5. Define sampling rate? 
6. What is ISI? 
7. Define Pseudonoise sequence? 
8. What are the different types of multiple access techniques? 
9. Define Kepler’s three laws of planetary motions. 
10. What are the losses encountered by optical fiber? 

PART B — (5 × 16 = 80 Marks) 

11. (a) (i) Write short notes on : 
 (1) AM voltage distribution. (4) 
 (2) AM power distribution. (4) 
 (ii) An audio frequency signal 10 sin 2π ×500t is used to amplitude 
modulate a carrier of 50 t sin 2π ×10 . Calculate 
 (1) Modulation index (2) 
 (2) Side band frequencies (2) 
 (3) BW required (2) 
 (4) Total power delivered to the load of 600 Ω. (2) 
(b) (i) Compare FM and AM. (12) 
 (ii) The phase deviation constant in a phase modulation system is 
K = 0.01 rad/v. Calculate the maximum phase deviation when a 
modulating signal of 10 V is applied? (4) 
12. (a) (i) Explain the principle of FSK transmitter and receiver. (10) 
 (ii) Write short notes on the spectrum and bandwidth of FSK. (6) 
(b) (i) Compare the various types of digital modulation techniques. (8) 
 (ii) Explain the eyepattern in base band digital transmission with a 
neat diagram. (8) 
13. (a) (i) Explain the elements of PCM system with a neat block diagram. (12) 
 (ii) What is companding? (4) 
(b) (i) Find the signal amplitude for minimum quantization error in a 
delta modulation system if step size is 1 volt having repetition 
period 1 ms. The information signal operates at 100 Hz. (4) 
 (ii) Describe the operation of DPCM system with a relevant diagram.(12) 
14. (a) (i) Write a short note on frequency hop spread spectrum. (10) 
 (ii) Explain the applications of spread spectrum techniques. (6) 
(b) (i) Give a detail account of the different types of multiple access 
techniques. (10) 
 (ii) Compare TDMA and CDMA. (6) 
15. (a) (i) Discuss briefly the basic satellite communication system. (8) 
 (ii) Write short notes on the LEO and GEO orbits. (8) 
(b) Enumerate the elements of an optical fiber transmission link. (16)