(Alexa, Nic, Sheila)

We measured the ALS COMM OLTF and found the UGF to be ~400 Hz, with a crossover at ~70 Hz. In September we had changed filters in MC2, and CARM as reported in alog 14214  to increase the crossover frequency. I also noticed we had changed our configuration in the LSC_REFL_SERVO CM board relative to what was in model (alog 11109). Now we have:

• In1 gain: 6dB, POS, DISABLE
• In2 gain: -4 dB, POS, ENABLED
• NO common compenstations or boosts turned on
• Additionally, we have COMM PLL Boost on in the path to CM.