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प्रश्न
Explain the term demodulation used in a communication system.
With reference to communication systems, what is meant by demodulation?
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उत्तर
Demodulation is the process of retrieving information from the carrier wave at the receiver end. It is the reverse process of modulation.
संबंधित प्रश्न
Write the functions of the following in communication systems:
Modulator
Write the functions of the following in communication systems:
Demodulator
Distinguish between broadcast mode and point-to-point mode of communication and give one example for each.
A device X used in communication system can convert one form of energy into another. Name the device X. Explain the function of a repeater in a communication system.
Distinguish between point to point and broadcast modes of communication. Give an example of each.
Explain the basic concept of mobile telephoning ?
Distinguish between point to point and broadcast modes of communication. Give an example of each.
A 1 KW signal is transmitted using a communication channel which provides attenuation at the rate of – 2dB per km. If the communication channel has a total length of 5 km, the power of the signal received is `["gain in dB" = 10 log ("P"_0/"P"_"i")]`
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:
An audio signal is modulated by a carrier wave of 20 MHz such that the bandwidth required for modulation is 3 kHz. Could this wave be demodulated by a diode detector which has the values of R and C as
- R = 1 kΩ, C = 0.01 µF.
- R = 10 kΩ, C = 0.01 µF.
- R = 10 kΩ, C = 0.1 µF.
