Advertisements
Advertisements
प्रश्न
Distinguish between ‘Analog and Digital signals’.
Advertisements
उत्तर
It is continuous signal, which varies continuously with variable may be time or distance etc.
E.g. Sound of human
Digital Signal:-
It is a type of signal which has only two values high or low. In digital high mean 1 and low means zero.
E.g. Temperature of day
Maximum 30°C ⇒ 1
Minimum 15°C ⇒ 0
APPEARS IN
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).
Answer the following question :
Define 'bandwidth' and describe briefly its importance in communicating signals ?
Block diagram of a receiver is shown in the figure:
(a) Identify ‘X’ and ‘Y’.
(b) Write their functions.
Write any two factors which justify the need for modulating a signal ?
Draw a diagram showing an amplitude modulated wave by superposing a modulating signal over a sinusoidal carrier wave.
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):
The sound produced by a funning fark is a sort of:-
Broadcast band in which FM lies is ______.
