31. If the intermediate frequency is very high (indicate false statement)—
    

1. 1. Image frequency rejection is very good
      

   
   
   

   2. The local oscillator need not be extremely stable
      

   
   
   

   3. The selectivity will be poor
      

   
   
   

   4. Tracking will be improved

   
   
   

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   NA

   Correct Option: D

   NA

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32. The local oscillator of a broadcast receiver is tuned to a frequency higher than the incoming frequency—
    

1. 1. To help the image frequency rejection
      

   
   
   

   2. To permit easier tracking
      

   
   
   

   3. Because otherwise an intermediate frequency could not be produced
      

   
   
   

   4. To allow adequate frequency coverage without switching

   
   
   

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   The local oscillator of a broadcast receiver is tuned to a frequency higher than the incoming frequency to allow adequate frequency coverage without switching.

   Correct Option: D

   The local oscillator of a broadcast receiver is tuned to a frequency higher than the incoming frequency to allow adequate frequency coverage without switching.

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33. Three-point tracking is achieved with—
    

1. 1. Variable selectivity
      

   
   
   

   2. The padder capacitor
      

   
   
   

   3. Double spotting
      

   
   
   

   4. Double conversion

   
   
   

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   Three-point tracking is achieved with the padder capacitor.

   Correct Option: B

   Three-point tracking is achieved with the padder capacitor.

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34. A receiver has poor IF selectivity. It will therefore also have poor—
    

1. 1. Blocking
      

   
   
   

   2. Double-spotting
      

   
   
   

   3. Diversity reception
      

   
   
   

   4. Sensitivity

   
   
   

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   NA

   Correct Option: A

   NA

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35. One of the main functions of the RF amplifier in a superheterodyne receiver is to—
    

1. 1. Provide improved tracking
      

   
   
   

   2. Permit better adjacent-channel rejection
      

   
   
   

   3. Increase the tuning range of the receiver
      

   
   
   

   4. Improve the rejection of the image frequency

   
   
   

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1. View Hint View Answer Discuss in Forum

   One of the main functions of the RF amplifier in a superhetrodyne receiver is to improve the rejection of the image frequency.

   Correct Option: D

   One of the main functions of the RF amplifier in a superhetrodyne receiver is to improve the rejection of the image frequency.

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