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प्रश्न
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.
उत्तर
The device X used in communication system, which can convert one form of energy into another is called a transducer.
Function of repeater: A repeater is used to increase the range of the transmission in communication systems with the help of a set of receiver and transmitter. They are erected at suitable locations in between the transmitter and the receiver. Each repeater receives the transmitted signal, amplifies it properly keeping its original form intact and then relays it to the next repeater.
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संबंधित प्रश्न
Explain the terms Attenuation used in Communication System.
Write the functions of the following in communication systems:
Transmitter
Write the functions of the following in communication systems:
Modulator
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.
What is the function of a bandpass filter used in a modulator for obtaining AM signal?
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.
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.
