36. The image frequency of a superheterodyne receiver—
    

1. 1. Is created within the receiver itself
      

   
   
   

   2. Is due to insufficient adjacent channel rejection
      

   
   
   

   3. Is not rejected by the IF tuned circuits
      

   
   
   

   4. Is independent of the frequency to which the receiver is tuned

   
   
   

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1. View Hint View Answer Discuss in Forum

   The image frequency of a superhetrodyne receiver is not rejected by the IF tuned circuits.

   Correct Option: C

   The image frequency of a superhetrodyne receiver is not rejected by the IF tuned circuits.

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37. Indicate the false statement. The superheterodyne receiver replaced the TRF receiver because the latter suffered from—
    

1. 1. Gain variation over the frequency coverage range
      

   
   
   

   2. Insufficient gain and sensitivity
      

   
   
   

   3. Inadequate selectivity at high frequencies
      

   
   
   

   4. Instability

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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38. If an FET is used as the first AF amplifier in a transistor receiver, this will have the effect of—
    

1. 1. Improving the effectiveness of the AGC
      

   
   
   

   2. Reducing the effect of negative-peak clipping
      

   
   
   

   3. Reducing the effect of noise at low modulation depths
      

   
   
   

   4. Improving the selectivity of the receiver

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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39. Indicate which of the following circuits could not demodulate SSB?
    

1. 1. Balanced modulator
      

   
   
   

   2. Product detector
      

   
   
   

   3. BFO
      

   
   
   

   4. Phase discriminator

   
   
   

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1. View Hint View Answer Discuss in Forum

   Phase discriminator circuits could not demodulate SSB.

   Correct Option: D

   Phase discriminator circuits could not demodulate SSB.

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40. When a receiver has a good blocking performance, this means that—
    

1. 1. It does not suffer from double-spotting
      

   
   
   

   2. Its image frequency rejection is poor
      

   
   
   

   3. It is unaffected by AGC derived from nearby transmissions
      

   
   
   

   4. Its detector suffers from burnout

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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