WCIGAFETW

I am a Mechanical Engineer who does accident reconstruction and testing. I love it.

Hello everyone, I am needed to apply a filter to some acceleration data. That I think I can handle (I have chosen a Butterworth). What I do not understand are the CFC (Channel Filter Class) specifications. In particular, I do not know what a "Stop Damping" number specified in -dB is. Below is an example of a CFC60. Filter type CFC 60 Filter parameters 3 dB limit frequency: 100 Hz Stop damping: –30 dB Sampling frequency: At least 600 Hz My sensor samples at 400 Hz which puts my CFC at about 36. Please correct me if I am wrong. At CFC 36, what would my parameters be? Do they define cut-off frequencies? Thank you for any help. Google-skill"z" are failing me. David