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A male voice after modulation-transmissi...

A male voice after modulation-transmission sounds like that of a female to the receiver. The problem is due to

A

poor selection of modulation index ( selected ` 0 lt m lt 1`)

B

Poor bandwidth selection of amplifiers

C

poor selection of carrier frequency

D

loss of energy in transmission

Text Solution

Verified by Experts

The correct Answer is:
B
The frequency of male voice is less than that of a female voice . In the given problem , the frequency od modulated signal received becomes more , which is possible with the poor band width selection of amplifers . It is so because band width in amplitude modulation = twice the frequency of modulating signal .
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PRADEEP-COMMUNICATION SYSTEMS-Exercise
  1. A speech signal of 3 kHz is used to modulate a carrier signal of frequ...

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  2. A message signal frequency omega(m) is superpiosed on a carrier wave o...

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  3. A male voice after modulation-transmission sounds like that of a femal...

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  4. A basic communication system consists of (A) transmitter (B) informat...

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  5. Identify the mathematical expression for amplitude modulated wave:

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  6. An audio signal of 15 kHz frequency cannot be transmitted over long di...

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  7. Audio sine waves of 3 kHz frequency are used to amplitude modulate a c...

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  8. A TV transmission tower has a height of 240 m. Signals broadcast from ...

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  9. In amplitude modulation, the modulation index mu, is kept less than or...

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  10. Modulation is the process of superposing

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  11. A carrier wave is modulated by n number of sine waves with modulation ...

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  12. Which of the following is not transducer?

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  13. For what value of m(a) will the total power per cycle be maximum in th...

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  14. In amplitude modulation, sinusoidal carrier frequency used is denoted ...

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  15. A dilode AM detector with the output circuit consisting of R=1 kOmega ...

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  16. In an amplitude modulation with modulation index 0.5 the ratio of the ...

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  17. A signal wave of frequency 12 kHz is modulated with a carrier wave of ...

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  18. Which of the following device is full duplex?

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  19. A signal of 5 kHz frequency is amplitude modulated on a carrier wave o...

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  20. A radiostation has two channels. One is AM at 1020 kHz and the other F...

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