Advertisements
Advertisements
प्रश्न
Explain the terms Demodulation used in Communication System.
उत्तर
Demodulation: It is the process of retrieval of 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:
Transmitter
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.
Write the function of receiver in communication system.
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.
Which of the following would produce analog signals and which would produce digital signals?
- A vibrating tuning fork.
- Musical sound due to a vibrating sitar string.
- Light pulse.
- Output of NAND gate.
Figure shows a communication system. What is the output power when input signal is of 1.01 mW? (gain in dB = 10 log10 (Po/Pi).
