Electronics Handbook/Electronic Machines/Audio Machines/Radio

Radio 400px Configurations Basic Configuration Basic Configuration requires two components Microphone connect with Speaker in a closed loop Microphone + Speaker Enhanced Configuaration Microphone + Amplifier + Volume Control + Speaker Radio Band Broadcasting AM Sound wave is tured into Standing Wave then mixed with Carrier wave to produce broadcasting wave called AM . This method requires the amplitude of the Carrier wave varies with the amplitude of the Sound wave's Enevelop FM Sound wave is mixed with Carrier wave to produce broadcasting wave called FM . In this method the amplitude of Sound wave and Carrier wave is unchanged only the frequency is changed PM Sound wave is shifted and mixed with Carrier wave to produce broadcasting wave called PM . In this method the amplitude of Sound wave and Carrier wave is unchanged only the Phase is changed