communication

Modulation and Demodulation

Modulation is performed at the broadcast station to relay audio signals to the receiver over a greater distance. Since the modulated wave is picked up by the radio's receiver, the audio signal needs to be retrieved from it. In a radio receiver, this phase is received and is called demodulation.

Modulation: 

AVR- Serial Communication

SERIAL COMMUNICATION (Data Receive)

Modes of Data Transfer:

(i) Synchronous

(ii) Asynchronous 

SYNCHRONOUS TRANSMISSION- In this type the actual data is transferred BIT by BIT on the DATA line. The clock line signals the end of 1 bit and the start of another bit. When the clock line changes its level, that is when it goes HIGH from a LOW level or vice versa the data is transferred.

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