Modulation is used for transmitting (digital) signals using an analog
carrier. There are three basic kinds of modulations.
To see the different kinds of modulation,
just enter a binary code and press the "ok"-button. You can also change
the frequency of the carrier signal with the up- and down-buttons.
- FM (frequency modulation): the frequency of the carrier changes according to the
- AM (amplitude modulation): the amplitude is influenced by the digital signal.
This method is simple, but the resulting signal is quite easily disturbed.
- PM (phase modulation): according to the digital signal,
the phase of the analog signal is altered. Phase modulation is the best, but also the most difficult method.