Operation and Features 2
U8903A User’s Guide 21
Digital filters
The U8903A has a series of filters that are implemented
digitally. They consist of low pass, high pass, and weighting
filters such as CCITT, CCIR, C- Message, and A- Weighting.
The U8903A also allows user- defined filters to be uploaded
to the device. You need to specify the filter parameters
comprising filter type, group delay, and coefficients/sections.
The filter parameters will be saved in a file and then
uploaded to the U8903A. Refer to “Appendix C: User- defined
Filter File Format” on page 144 for more information on the
user- defined filter file format.
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