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प्रश्न
Answer the following question :
Define 'bandwidth' and describe briefly its importance in communicating signals ?
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उत्तर
Bandwidth is the range of frequency over which an equipment operates or the part of the spectrum occupied by the signal.
In the communication system, the message signal may be voice, music, pictures or computer data. Each signal has a different range of frequency. Hence, it has a different bandwidth. The type of communication for a given signal depends on the band of frequency that is considered essential for the communication.
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संबंधित प्रश्न
Which of the following frequencies will be suitable for beyond-the-horizon communication using sky waves?
(a) 10 kHz
(b) 10 MHz
(c) 1 GHz
(d) 1000 GHz
Digital signals
(i) Do not provide a continuous set of values,
(ii) Represent values as discrete steps,
(iii) Can utilize binary system, and
(iv) Can utilize decimal as well as binary systems.
Which of the above statements are true?
(a) (i) and (ii) only
(b) (ii) and (iii) only
(c) (i), (ii) and (iii) but not (iv)
(d) All of (i), (ii), (iii) and (iv).
Whatis the difference between analogue signal and. digital signal?
Block diagram of a receiver is shown in the figure:
(a) Identify ‘X’ and ‘Y’.
(b) Write their functions.
Distinguish between ‘Analog and Digital signals’.
Write any two factors which justify the need for modulating a signal ?
Write briefly any two factors which demonstrate the need for modulating a signal. Draw a suitable diagram to show amplitude modulation using a sinusoidal signal as the modulating signal.
The area of the region covered by the TV broadcast by a TV tower of 100 m height is (Radius of the earth = 6.4 × 106 m):
What is meant by deviation in frequency of FM wave?
Broadcast band in which FM lies is ______.
