**Block Category:** Matrix Operation

**Description:** The psd block accepts a vector of
signal values and produces a vector of power spectrum values. The psd block
performs an FFT on the input vector then transforms the FFT to represent power
versus frequency. To capture all the power spectrum information, plot the output
on a Log Y plot.

The change in frequency of the psd output vector equals

**Label:** Indicates a user-defined block label that
appears when **View** **>** **Block** **Labels** is
activated.