Reply by Sylvianne Tameze ●March 11, 20032003-03-11
Hi all,

i forgot to specify that my 6th order bessel low pass
filter is a digital one.
I read from the help files that the function besself
does not support the design of digital filters,just
analog.

My specifications are as follow : Cutott frequency
> 8.2MHz and my sampling rate is 52.32 MHz (for DVD
> purposes).
> My Code is the following
>
> clear all;
> a=[10395];
> wo=1/(8.2e6*2*pi)
>
> b=[1*(wo^6) 21*(wo^5) 210*(wo^4) 1260*(wo^3)
> 4725*(wo^2) 10395*(wo) 10395];
>
> c=tf(a,b)
> h(c,1/52.32e6,'tustin')
> bode(h)
>
I am sure i am making a mistake somewhere,but where?
Thx =====
Sylvianne