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प्रश्न
Write any two factors which justify the need for modulating a signal ?
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उत्तर
(i) To send the signal over large distances for communication.
(ii) To avoid the fluctuation and reduce noise of signal.
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संबंधित प्रश्न
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.
Draw a diagram showing an amplitude modulated wave by superposing a modulating signal over a sinusoidal carrier wave.
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.
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Long distance short-wave radio broadcasting uses
Broadcasting antennas are generally
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