DIGITAL SIGNAL

digital signal

DIGITAL SIGNAL:

  Digital signal are not continuous, but it is discrete time signal and having only two state 1 and 0 or on and off. It use binary number to proceed and execute, where binary number is finite 1 and 0. It represents the info in the form of bit. Digital signal described with bit rate and bit interval. Digital signals are safe to noise so it hardly force nay distortion in signals. 

Example: of digital signal is all the digital device work on digital signal like digital watch, digital calculator and computer etc.

Definition of the terms that described digital signal.

Bit Interval

  Bit interval described the time required to bending a single bit.

Bit Rate:

  Bit rate represent the frequency of bit interval.

Characteristic of digital signal:

   As mention above that digital signal is a discrete signal which have only to state high and low high means 1 or On where low state take as 0 or Off.  From them the increasing edge is called leading or Rising edge as shown in figure.

digital signal characteristic

  The time require to complete distance between one rising/leading edge and another rising edge is called time period that denoted by T. The distance between one rising edge and falling edge can be taken as 1 or On and distance between one falling edge and rising edge can be taken as 0 or Off.

ADVANTAGES OF DIGITAL SIGNAL:

Some important advantages are given bellow.

  Ø  Digital signals are less expensive.

  Ø  More reliable.

  Ø  Easy to manipulate.

  Ø  Efficient and reliable to transmit and proceed.

DISADVANTAGES OF DIGITAL SIGNAL:

Some disadvantages of digital signals facing when digital signal are transmit.

  Ø  Digital signal found sampling error.

  Ø  Digital communication required greater bandwidth.

  Ø  It needs circuit to change digital to analog and analog to digital signal.