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प्रश्न
Distinguish between broadcast mode and point-to-point mode of communication and give one example for each.
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उत्तर
The difference between point-to-point mode of communication and broadcast mode of communication :
| Point-to-point mode of communication | Broadcast mode of communication |
| Point to point communication mode is the communication over a link between a single transmitter and a receiver. | In broadcast mode large number of receivers are linked to a single transmitter. |
| Only one receiver is involved here | A large number of receivers may be involved. |
| Telephone is an example of such a system. | Radio is example of such system. |
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संबंधित प्रश्न
Explain the terms : Transmitter in communication system
Write the functions of the following in communication systems:
Transmitter
Explain the term demodulation used in a communication system.
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.
Explain the basic concept of mobile telephoning ?
Write the function of receiver in communication system.
Write the functions of the transducer and repeaters.
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).
