Electronics Handbook/Electronic Machines/Audio Machines/Radio
Radio
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Configurations
[edit | edit source]Basic Configuration
[edit | edit source]Basic Configuration requires two components Microphone connect with Speaker in a closed loop
- Microphone + Speaker
Enhanced Configuaration
[edit | edit source]- Microphone + Amplifier + Volume Control + Speaker
Radio Band Broadcasting
[edit | edit source]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