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प्रश्न
Differentiate between Analog and Digital communication.
उत्तर १
The signal (current or voltage) in the form of continuous, time-varying voltage or current are called continuous or analogue signals. Shows a pulse waveform in which only discrete values of voltages are possible. It is convenient to use binary mumbers to represent such signals.
उत्तर २
An analog communication system uses analog signals for the transfer of information whereas a digital communication system uses digital signals for the transfer of information. In analog communications, signals are consist of continuous values but in digital communications, signals are consist of discrete values.
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.
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.
A TV tower has a height of 100 meter. If the coverage range is to be made three times then the height of the tower should be increased by.
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 audio frequency range is
Would sky waves be suitable for transmission of TV signals of 60 MHz frequency?
