Noise in Phase Modulation MCQ

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• In systems, pre-emphasis is used to amplify ________
  ক

  high frequency

  খ

  low frequency

  গ

  phase

  ঘ

  amplitude
• In FM the carrier deviation is determined by ________
  ক

  Frequency

  খ

  Modulation

  গ

  Amplitude

  ঘ

  Phase
• If selectivity is poor then the receiver has poor _________
  ক

  sensitivity

  খ

  diverse reception

  গ

  blocking

  ঘ

  fidelity
• If the output power of radio receiver is doubled then the volume is increased by _________
  ক

  3 dB

  খ

  2 dB

  গ

  -3 dB

  ঘ

  -2 dB
• Padder capacitor can be used to achieve three point tracking.
  ক

  True

  খ

  False
• Most of the amplification of the received signal is obtained in a superheterodyne receiver from ________ stage.
  ক

  IF

  খ

  RF

  গ

  Power Amplifier

  ঘ

  Local Oscillator
• Which of the following receiver does not have an amplitude limiter stage?
  ক

  AM

  খ

  PM

  গ

  FM

  ঘ

  Both AM and FM
• In AM receiver, the oscillator frequency is always ________
  ক

  lower than signal frequency

  খ

  higher than signal frequency

  গ

  equal to signal frequency

  ঘ

  equal to 1KHz