Following up to the problem (insufficient whitening) reported in  alog 20700,  new dewhitening filters  are implemented in the following DEALTAL_CTRL channels:

H1:CAL-CS_DARM_DELTAL_CTRL_M0/L1/L2/L3_WHITEN:  Original -- (zpk([1, 1, 1], [500,500,500],1,"n")

Changed to  (zpk([0.1,0.1,0.1,0.1], [100,100,100,100],1,"n")

H1:CAL-CS_DARM_DELTAL_CTRL_SUM_WHITEN: Original --(zpk([1, 1, 1,1,1], [100,100,500,500,500],1,"n")

Changed to  (zpk([0.1,0.1,0.1,0.1], [100,100,100,100],1,"n")

The first attached plot shows DARM CTRL signal with original filter in dotted  lines and the new filter  in solid lines.

The second plot shows the effect of different filter combinations on DARM_CTRL signal. This measurement gave us an intuition on what filter to use eventually.