Filter Design Toolbox Release Notes

Known Software and Documentation Problems

This section updates the Filter Design Toolbox 2.0 documentation, reflecting known Filter Design Toolbox 2.0 software or documentation problems.

Filter Design and Analysis Tool

The quantization dialog in FDATool does not provide context-sensitive help in this release. To get help on a control in the dialog, use the Help browser. Select an option, such as FDATool Help, from the Help menu in FDATool. Or type helpdesk at the MATLAB prompt to open the online help system.

Switching Between Design and Quantization Modes in FDATool

After you scale a quantized filter, or convert a quantized filter to second-order sections, do not switch between quantized mode and filter design mode in FDATool. Checking and clearing the Turn quantization on option (to shift between the quantization and design modes) after you have scaled or converted a quantized filter can corrupt the coefficients for your reference filter and your quantized filter.

To recover your reference filter design and quantized filter design if they have been corrupted, either:

• Import the filter from your workspace again
• Use FDATool to repeat the filter design

Upgrading from an Earlier Release