Hello,
i want to do measurements with a FFT-spectrum-analyzer. Assume, the displayed frequenzy range is 25.6kHz. I use 400 lines of resolution. Thus, i have frequency points ever 64Hz (the frequency bins are 64Hz sperated from each other). I use Hanning windowing. Now, i change the frequency range from 25.6kHz to 6.4kHz. The resolustion is still 400 lines. So the frequency bins are
6400/400=16Hz sperated from each other. The window is still a Hanning one. But what is with the width of the window? Is ist constant in both measurements? Or does it adapt to the frequency range? Is main peak (from 0dB to 3dB) wider when the frequency bins are more far away from each other?Thank you in advance,
Jens