Advertisements
Advertisements
प्रश्न
Write any two factors which justify the need for modulating a signal ?
Advertisements
उत्तर
(i) To send the signal over large distances for communication.
(ii) To avoid the fluctuation and reduce noise of signal.
APPEARS IN
संबंधित प्रश्न
Frequencies in the UHF range normally propagate by means of:
(a) Ground waves.
(b) Sky waves.
(c) Surface waves.
(d) Space waves.
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?
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.
What do you mean by bandwidth of a signal? Give its importance.
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):
Long distance short-wave radio broadcasting uses
The sound produced by a funning fark is a sort of:-
Broadcast band in which FM lies is ______.
Would sky waves be suitable for transmission of TV signals of 60 MHz frequency?
