The command

withchebyshev (<order>,<ripple>) ;

results in a Chebyshev cascade filter. Its bandwidth is 1rad/s. If the ripple is zero, the bandwidth is the frequency where the damping is -3 dB. If the ripple is nonzero, the bandwidth is the highest frequency where the damping equals the ripple.

<order>: integer; order, <ripple>: real; ripple in dB

2009-06-03