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प्रश्न
Distinguish between point to point and broadcast modes of communication. Give an example of each.
उत्तर
In point to point mode of communication, information is sent from a sender to specific receiver, i.e., from one point to another point and in broadcast mode, the information is broadcasted to all receivers simultaneously.
An example of point to point communication is a telephone where one telephone is connected to just one other at a time. A radio or television can be an example of broadcast mode where there are many receivers available at one time.
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संबंधित प्रश्न
Explain the terms Attenuation used 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:
Demodulator
Explain the terms Demodulation used in Communication System.
Distinguish between point to point and broadcast modes of communication. Give an example of each.
Explain the basic concept of mobile telephoning ?
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.
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).
