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प्रश्न
Explain the terms Attenuation used in Communication System.
उत्तर
Attenuation: The loss of strength of a signal while propagating through a medium is called attenuation.
संबंधित प्रश्न
Explain the terms : Transmitter in communication system
What is the function of a 'Repeater' used in communication system?
Write the functions of the following in communication systems:
Transmitter
Write the functions of the following in communication systems:
Demodulator
Distinguish between point to point and broadcast modes of communication. Give an example of each.
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 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")]`
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.
