Jennie W, Sheila

Jennie moved the DARM offset (H1:OMC-READOUT_X0_OFFSET  from 10.9 to 7.74 in slow steps) which changed the DCPD sum from 40mA on the DCPDs to 20mA.  This makes the SRCL feedforward adding noise below 70 Hz, but had no impact on the sensitivity above 80 Hz, as shown in the first attachment. 

The second attachment shows a DARM OLG measurement before and after the change, the gain at 60 Hz was the same within 1%.