Advertisements
Advertisements
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
Write the functions of the following in communication systems:
Modulator
Write the functions of the following in communication systems:
Transducer
Write the functions of the following in communication systems:
Receiver
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 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:
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.
