integralx2
New Member
I dont understand what effect the stopband frequency has after the cuttoff frequency. I understand lets say the cuttoff is 1000 Hz. It starts rolling of there at about -20db/dec. Now the attenuation frequency is suppose to be set i would assume a decade higher, and have it roll of at -45db/dec ? I dont understand how this effects the signal. Whats the benefit of making it closer (if there is any) to the cutoff frequency? Also the drop of rate of -45db/dec , if its increased what does that do the signal ? Also whats the benefit of making something roll of faster at the cuttoff frequency fc ?