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Academy of Technology
Academy of Technology is an online resource in Urdu and Hindi languages.
The website focuses on providing quality video lectures and notes related to topics. Our aim is to help people by giving them comprehensive information and techniques to improve their knowledge in computer and communication networking. Our focused audience is beginner level but some topics need some background.We are opening doors for everyone to get some knowledge.Our target study areas are
To be recognized and respected as one of the best online educational resources.
Our mission is to provide best online education in the Urdu language.
Hafiz Salman Ahmad
MS Computer and Communication Networks
What is line coding?
What is NRZ?
What is Unipolar coding?
What is polar coding?
What is Bipolar coding?
What is manchester coding?
What is AMI?
Line coding types?
Which is line coding good?
Line coding in Urdu and Hindi?
Line coding a technique to convert digital data into a digital signal.
A signal element is the shortest element of the signal.
DE is the person and SE is the carrier
Data elements send in one second. The unit is bit/sec.
Signal rate/Baud rate.
It has only one polarity waveform
It has two polarity waveform (+ve and -ve)
It has three level voltage waveform (+ve, 0V and -ve)
Non-Return to Zero NRZ
NRZ waveform only traces the +ve and -ve peaks.
It has two further classes
In NRZ-L, the voltage levels tell the bit information.
In NRZ-I, The change in pattern tells the bit information.
Return to Zero RZ