The early and simple form of modulation for radio communication. Explore AM modulator, demodulator, transmission examples, modulation trapeze ...
Spectra of FM signals
Frequency modulation signal spectra show sidebands for sinewave modulation. In this experiment we take a look how they change with the modulating signal amplitude.
Produce a frequency modulated transmission signal. Select music, speech, microphone or take your own audio file. Demodulate the signal using the FM receiver or let a USRP SDR transmit...
Demodulate the FM transmission signal. Listen to the received music or speech. Check if you modulated the audio signal properly and the frequency deviation is adjusted properly...
In this experiment, four-channel signals are available for practicing demodulation. Each of the channels is modulated in a different way.
Analog demodulation challenge
In order to deepen amplitude and frequency modulation and demodulation an experiment was designed.
Amplitude modulation made radio broadcasting possible. Single sideband modulation made it possible to improve it, by saving bandwidth. Analyze a SSB-signal in time and frequency domain and change parameters...