Notch filter is not a notch filter?

[guglie]

Thank you @andyp1per, with your post filtering log I think I have found another filtering problem:

Acc/Gyro filter is not a Low Pass Filter?

Thanks to the great work of @andyp1per (see Notch filter is not a notch filter?) I was able to log and do FFT analysis on post filtered gyro, and something seemed wrong. Here’s one FFT post filter with GYRO_FILTER = 80hz (and notch at 144hz, badnwidth 14hz, attenuation 30db) and with “normal” flight speed: [normal_flight%20gyro80%20notch144%20bw14%20att30] Here’s another with GYRO_FILTER = 100hz (and notch at 147hz, badnwidth 60hz, attenuation 55db), on a fast flight (I zoomed to have same y…

To me it seems that the LPF is not working at all.