these are notes for the student of communication engineering & information tech
Thursday, 25 October 2012
Monday, 22 October 2012
Wednesday, 17 October 2012
chap 1 board question of w11 s11 w12
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SR. 
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Question 
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marks 
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year 
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1.     
    
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What is  superhetrodyne 
  receiver ? explain with respect to AM receiver . 
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4 marks 
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S11 
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| 
   
2.     
    
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draw square law diode detector
  .State its limitations 
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-4marks 
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w11 
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3.     
    
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draw AM waveform in time domain
  for m>1,m=1 &m<1 
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6marks 
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w11 
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4.     
    
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Draw frequency spectrum of AM
  .state 2 advantages of FM over AM 
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4 marks 
 | 
  
   
S12 
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5.     
    
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Compare AM & FM 
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4 marks 
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W 11, w11 
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6.     
    
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Compare AM & PM 
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4 marks 
 | 
  
   
W11 
 | 
 
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7.     
    
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Draw neat block diagram of
  Communication system. State functions of each block 
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4 marks 
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S 12, S11 
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8.     
    
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Draw neat diagram of AM
  transmitter ,Describe function of each block 
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6 marks 
 | 
  
   
S 12 
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9.     
    
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Define FM state ideal &
  practical B/W requirement of FM 
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4 marks 
 | 
  
   
S12 
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10.    
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Find % modulation when Emax=132 V.P.P. & Emin = 28 V.P.P  Draw AM waveform 
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4 marks 
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S12 
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| 
   
11.    
 | 
  
   
Draw frequency spectrum of AM
  .state 2 advantages of FM over AM 
 | 
  
   
4 marks 
 | 
  
   
S12 
 | 
 
| 
   
12.    
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Define modulation index of
  AM  , draw waveform for m=1,m<1,m>1 
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4 marks 
 | 
  
   
S12 
 | 
 
| 
   
13.    
 | 
  
   
Define FM state ideal &
  practical B/W requirement of FM 
 | 
  
   
4 marks 
 | 
  
   
S12 
 | 
 
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14.    
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Compare AM,FM ,PM  w.r.t.
   waveform ,B/W , MI, frequency Spectrum 
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4 marks 
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S11 
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15.    
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Compare AM,FM ,PM  w.r.t.
   waveform ,B/W , MI, frequency Spectrum 
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4 marks 
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S11 
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Monday, 8 October 2012
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