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Reports until 23:56, Monday 16 February 2015
H1 ISC
sheila.dwyer@LIGO.ORG - posted 23:56, Monday 16 February 2015 (16749)
CARM crossover is not correct

After the earth quake settled I redid the intial alingment, the DRMI alingment was fine, but something was wrong with the ALS COMM open loop gain.  Attached are TFs measured by exciting into the fast path of the CM servo board, the slow path, and the common path.  A few weeks ago, the UGF was about 250 Hz.  

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Displaying report 1-1 of 1.