What is the role of transmitter in communication system?

to decode a signal to be transmitted

to convert one form of energy into other

to detect and amplify information signal from the carrier

to produce radio waves to transmit data

Transmitter is used to produce radio waves which are then sent to the antennae to transmitted.
It encodes or modulates the message signal before transmission.
Transducer converts a signal from one form of energy to other.
Receiver detects and amplifies information signal from the carrier.

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