User`s guide

15 Filter Design Toolbox 2.1 Release Notes
15-8
Known Software and Documentation Problems
This section updates the Filter Design Toolbox 2.1 documentation, reflecting
known Filter Design Toolbox 2.1 software or documentation problems.
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. Selecting 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
Help for Filter Transformations in FDATool
Option Transformations in FDATool does not have What’s This? help
available. Use
helpwin functionname for information about the
transformation functions or use the Help browser to search the online
documentation.