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Concept of analog, digital and carrier signals

 Analog and Digital Transmission


Analog Signal: The system in which variable signal i.e. the signal can have any meaning at any time, is called analog signal. This signal is used for data processing in analog devices like radio, TV etc. The wave/shape of an analog signal is--

Analog Signal and Digital Signal


Digital Signal: The level of the signal is variable, i.e. the level of the signal changes over time in a certain step, it is called a digital signal. This signal is used for data processing in digital devices like computers, digital clocks etc. The wave/shape of a digital signal is--


Analog Signal and Digital Signal


Carrier Signal: Carrier signal is a type of high frequency signal, which is used as a carrier wave to transmit electrical signals to distant places. -

The wave/shape of carrier signal is the difference between analog, digital and carrier signal: The difference between analog, digital and carrier signal is given below--


Analog signal

(i) A system in which the signal is variable i.e. the signal can have any value at any time, is called analog signal.

(ii) This signal is used for analog device data processing.


Digital signal

(i) A system in which the level variable signal i.e. the level of the signal changes in a fixed step over time is called a digital signal.

(ii) This signal is used for signal information processing in digital devices (eg carrier signal at remote location (eg radio, TV etc.) in case of computer, digital clock etc.).


Carrier signal


(i) Carrier signal is a type of high frequency signal which is used as a carrier wave to transmit electrical signals over long distances.

(ii) Used as carrier wave to transmit to distant places.

 





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