Analysis Parameters

In the plot area of any filter response plot (Magnitude, Phase, etc.), right-click and select Analysis Parameters to display details about the displayed plot. Not all fields are displayed for all types of plots.

  • Normalized Frequency — if selected, frequency is normalized from 0 through 1, or if not checked, frequency is in Hz.

  • Frequency Scale — y-axis scale (Linear or Log)

  • Frequency Range — range of the frequency axis or Specify freq. vector

  • Number of Points — number of samples used to compute the response

  • Frequency Vector — vector to use for plotting if Specify freq. vector is selected in Frequency Range.

  • Magnitude Display — y-axis units (Magnitude, Magnitude (dB), Magnitude squared, or Zero-Phase)

  • Normalize Magnitude to 1 (0 dB) — select to normalize the magnitude so that the maximum value occurs at 1 (0 dB).

  • Phase Units — y-axis units (Degrees or Radians)

  • Phase Display — type of phase plot (Phase or Continuous Phase)

  • Group Delay Units — y-axis units (Samples or Time)

  • Specify Length — length type of impulse or step response (Default or Specified)

  • Length — number of points to use for the impulse or step response

You can also change the plot type for Impulse and Step Response plots by right-clicking and selecting Line with Marker, Stem, or Line from the context menu. You can change the x-axis units by right-clicking the x-axis label and selecting Samples or Time.

To save the displayed parameters as the default values to use when Filter Designer is opened, click Save as default.

To restore the MATLAB-defined default values, click Restore original defaults.