Stabilizer Phase

ld123

Hello,

I plan to use the stabilizer IIR coefficients to configure a PID. I have been using the equations found in to calculate these coefficients and I can output the correct magnitude (as shown in the VNA plot below). However, I have a linear phase with approximately 25us delay. I also get this delay when I have a unity transfer function (also pictured below).
I was wondering if this delay is expected for the stabilizer or if there is a way to reduce the delay. I am using the Stabilizer with v0.10.

PI filter [b0=1.03041662,b1=-0.95437507,b2=0,a1=-0.98479169,a2=0]

P filter [b0=1, b1=0, b2=0, a1=0, a2=0]

Thanks for the help

rjo

I got 18 samples last I measured this together with nonlinear responses. This is as designed as explained elsewhere.