In this video, we give an introduction into I and Q Signals in the context of digital signal processing. We handle and visualize them in FreeScopes Basic I.

Two signals where the phase is 90 degrees apart are called "in quadrature". Cosine wave and a sine wave are quadrature wave forms. The amplitude of the cosine wave we is called I or the In-phase signal. The amplitude of the quadrature waveform or the sine waveform is Q.

By appropriately varying the I and the Q as a function of time, we can generate the resulting sum of those wave forms as frequency modulation or phase modulation.

Through simple amplitude modulation of I and Q, we can create complex modulation in the resulting sum.

Look at the video. It makes abstract theory so simple to understand and fun to work with.

You find more about I/Q Signals in this special I/Q section.

The I & Q feature is part of the FreeScopes Basic I package.