06-30-2021, 10:05 PM
(06-30-2021, 06:26 PM)TheOldPresbyope Wrote: @Macdelf
It's been many decades since I played with Bode plots and that was in RF applications. I've forgotten more than I ever knew
Doesn't REW itself offer a way to create a phase plot from your data? What does that look like compared to the C-DSP plot?
Regards,
Kent
Yes REW does plot phase. It looks flat within say 10 degrees. Unlike C-DSP, REW centers the delay on the peak so it is not wrapped around. My peak is 250 ms into the impulse response and symmetric about that peak. As a function that is symmetric it has a pure real, but delayed, frequency response. I am beginning to believe that all is fine and that low resolution of the data points that are so wrapped around are making the plot look as it does. C-DSP should probably time shift the data to the center of the file or, better, to the peak of the impulse response prior to Fourier transforming it. Such wrap around makes it impossible to read anything meaningful from the plot anyway and covers up the imulse response plot.
