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प्रश्न
Write the functions of the following in communication systems:
Modulator
उत्तर
Modulator: Modulator modulates the message signal, i.e. it superimposes a low-frequency message signal on a high frequency carrier wave, so that the low-frequency message signal can be transmitted over long distances.
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संबंधित प्रश्न
Explain the terms Attenuation used in Communication System.
Write the functions of the following in communication systems:
Transducer
Write the functions of the following in communication systems:
Receiver
Write the functions of the following in communication systems:
Demodulator
Explain the terms Demodulation used in 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.
What is the function of a bandpass filter used in a modulator for obtaining AM signal?
A basic communication system consists of ______.
- transmitter.
- information source.
- user of information.
- channel.
- receiver.
Choose the correct sequence in which these are arranged in a basic communication system:
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.
