radio how stations share the same air and how we listen to only one station
Post on 18-Jan-2016
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RadioHow Stations Share The Same Air and How We Listen To Only One StationStations Divided By Frequency
KISSWBCNWBURkHzMHz
Do Stations Interfere?Yes!Is This Interference Reversible?Fortunately Yes!Combination of Transmitters
KISS 108FMWBUR90.8FMYour Car, iPod, etc.TransmitterReceiverTransmitterListening to One Station
Receiver gets combination of two frequencies (stations)We want to recover one frequency (station)Resonators!Small inputs at correct frequency give big outputsInputs at other frequencies give small outputs
OutputInputSwing Set
Mass-Spring (Slinky)InputOutput
Changing Stations
InputOutput
InputOutputWBURN90.8FMKISS108FMChange something about resonator to Tune it to a frequency (station) of choice
Knob on radio changes an electrical resonator
M1M2Big Picture
WBURN90.8FMMultiple StationsCombined WavesResonatorSingle Station
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