I have modified the DARM model from elog 11133, to include the fact that these are digital filters.
I have also extracted the data from elog 11143, and it together with the model.
The modeled loop has an arbitrary gain factor, to make it have the same 234Hz UGF as the measured data.
The modeled loop includes:
There is a 1.5 degree phase discrepancy at 100Hz, and an 11 degree phase discrepancy at 900Hz, but other than that, the modeled and measured loops match pretty well.
For the measured frequencies, here are the residuals: