Physics for IGCSE & O level - Rays And Waves (Section 6 - No. 26)
What does an encoder do?
Receives and converts audio signals to a different frequency.
Converts information into a format for transmission.
Removes the signal.
Converts the signal back to its original state.
Explication
The function of the encoder is to convert the information into a form that can be sent across the transmission path.