Each diagram shows the transmission of 01100. The red waveform represents the carrier frequency while the blue waveform represents the wave that would actually be sent. For amplitude modulation, a 0 is represented by a wave that has half the energy or height in the graph. A 1 is represented by a full sized wave. Frequency the frequency of the sine wave is changed.
Phase shift the phase of the sine wave is changed.
The value 01100 is sent below by shifting the wave 180 to represent a 1 bit while sending the wave unshifted to represent a 0. Combinations of AM and PSM are used in Quadrature Amplitude Modulation. The following simulation will show the waveform generated by different modulation techniques. Enter a short series of 0 and 1 bits that are to be transmitted using this technique and then press the Display button. You can easily view the different waveforms generated by the different techniques.