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प्रश्न
What are the three basic units in communication systems ? Write briefly the function of each of these.
उत्तर
A communication system consists of three basic units:
(i) Transmitter: This unit is used for transmitting the information after modifying it to a suitable form. It basically consists of a transducer that converts signal in any physical form to electrical signal for transmission. After that, the signal is modulated to transmit over long distances.
(ii) Communication channel: This unit carries the modulated signal from the transmitter to the receiver. Transmission lines act as a communication channel in case of telephony, whereas the free space serves the purpose of communication channel in case of the radio communication.
(iii) Receiver: This unit consists of an antenna, which receives the signal, followed by a demodulator, an amplifier and a transducer. The demodulator demodulates the modulated signal, the amplifier boosts up its intensity and the transducer converts it back again from electrical form to the needed physical form.
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संबंधित प्रश्न
Draw a block diagram of generalized communication system.
Draw a neat, labelled block diagram for a generalised communication system.
Distinguish between ‘Analog’ and ‘Digital’ forms of communication.
The figure given below shows the block diagram of a generalized communication system. Identify the element labelled 'X' and write its function.
Draw a neat, labelled block diagram of a receiver for the detection of amplitude modulated wave.
For efficient radiation and reception of signal with wavelength λ, the transmitting antennas would have length comparable to ______.
(A)`lambda` of frequency used
(B)`lambda/2` of frequency used
(C )`lambda/3` of frequency used
(D)`lambda/4` of frequency used
Draw the block diagram of a receiver in communication system
Explain the terms : Receiver in communication system
Distinguish between a transducer and a repeater.
Which of the following is the communication channel in case of radio communication?
