Following on from 71381, today during commissioning time, I injected 2.6Hz sine wave into in H1:OMC-SUS_M1_TEST_{L, P, Y, V, T, R}_EXC by increasing gradually the gain until when we reach the peak-to-peak amplitude around 40 urad or 4um on the H1:OMC-SUS_M1_DAMP_{L, P, Y, V, T, R}_INMON channels.  I didn't get this amplitude in R or V due as any higher gain was causing DAC saturations. 

• Y 22:21 to 22:26 with G=500 P2P 40urad ref 0
• P 22:28 to 22:33 with G=120 40rad ref1
• R 22:36 to 22:41 with G = 1000 4.5urad ref2 (had saturations with G 5000)
• V 22:45 to 22:50 with G = 10,000 1um ref3 (had saturations with G 50,000) 
• T 22:53 to 22:58 with G=2000 4um ref4
• L 23:00 to 23:05 with G=5000 4um ref5

DARM plot attached during these times. Can see a lot of coupling with P, Y, L. Not anything easily noticeable with R, V, T.