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प्रश्न
Write the functions of the following in communication systems:
Demodulator
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उत्तर
Demodulator is important components of communication systems. Its functions are as follows:
Demodulator: A demodulator demodulates the modulated signal, i.e. it separates the low frequency message signal that has been superimposed on high frequency carrier wave and retrieves the information from the carrier wave at the receiver.
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संबंधित प्रश्न
Explain the terms Attenuation used in Communication System.
What is the function of a 'Repeater' used in communication system?
Write the functions of the following in communication systems:
Transducer
Write the functions of the following in communication systems:
Receiver
Explain the term demodulation used in a communication system.
Distinguish between broadcast mode and point-to-point mode of communication and give one example for each.
Distinguish between point to point and broadcast modes of communication. Give an example of each.
Write the function of receiver in communication system.
Write the functions of the transducer and repeaters.
Audio sine waves of 3 kHz frequency are used to amplitude modulate a carrier signal of 1.5 MHz. Which of the following statements are true?
- The sideband frequencies are 1506 kHz and 1494 kHz.
- The bandwidth required for amplitude modulation is 6 kHz.
- The bandwidth required for amplitude modulation is 3 MHz.
- The side band frequencies are 1503 kHz and 1497 kHz.
