Naoki, Camilla

We scanned ADF demod phase with cold OM2 as we did with hot OM2 in 74691. The nominal ADF demod phase was 80 with hot OM2 and we tried to scan from 70, but the ADF servo was diverging with 70 demod phase, which means the ADF error signal is out of linear range. We found that the ADF demod phase around 100 would be good with cold OM2 so we scanned ADF demod phase from 90 to 110 using the same command in 74691 as shown in the attached figure. It seems that the ADF demod phase around 90 is optimal and we set the ADF demod phase to 91.