[Scilab-users] Bode of discret time transfer function.

[Pablo Fonovich]

Hi:

This is the first time i work with discrete time transfers functions and Scilab.

I want to use bode() for plotting the magnitud and phase response of the system, however, i don't understand how to set the frequencies to normalized values (-pi, pi).

This is what i'm doing:


s=poly(0,'s')
H=(s^(-2400))/(1-0.5*s^(-2400))
S=syslin('d',H)
bode(S)


i get a warning that frequencies beyond nyquist rate are ignored and the resulting plot is attached.

[cid:4845973f-0da4-4dd3-ade0-64a7e55422d3]

In the help, it says that bode parameter could include fmin and fmax in herz, but isn't a discrete system response limited to normalized frequencies? And to transform the normalized frecuency to herz the sample rate must be used, but i don't know how to pass it to the system or something.


Any hints would be appreciated.

Thanks
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