Analysis Parameters :: GUI: Filter Design and Analysis Tool (Signal Processing Toolbox)

Signal Processing Toolbox

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 of these fields are displayed for all types of plots.

Normalized Frequency--if selected, frequency is normalized between 0 and 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).
Autoscale axes--scale the axes automatically to the data. If the Magnitude Display is not Magnitude (dB), the axes are always autoscaled.
dB Display Range--enter the range (two values separate by a space) for the y-axis. This field is available only for Magnitude (dB) and only if Autoscale axes is not selected.
Phase Display--type of phase plot (Phase or Continuous Phase)
Phase Units--y-axis units (Degrees or Radians)
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

In addition to the above analysis parameters, you can 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 on the x-axis label and selecting Samples or Time.

To save the displayed parameters as the default values to use when FDATool or FVTool is opened, click Save as default.

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

Design Masks Sampling Frequency