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Entry  Thu Dec 3 19:10:28 2015, yutaro, Update, LSC, XARM lock with ITMX actuated and related change on ASS 40.png
    Reply  Mon Dec 7 15:56:35 2015, yutaro, Update, LSC, XARM lock with ITMX actuated and related change on ASS 
Message ID: 11845     Entry time: Thu Dec 3 19:10:28 2015     Reply to this: 11860
Author: yutaro 
Type: Update 
Category: LSC 
Subject: XARM lock with ITMX actuated and related change on ASS 

To avoid the strange kicking of ETMX, I locked XARM with ITMX actuated instead of ETMX so that I changed elements of C1LSC_OUTPUT_MTRX; before: XARM=ETMX, after: XARM=ITMX.

And I change C1:LSC-XARM_GAIN from 0.007 to 0.022.

 

With this setup, I ran dither but then error signals of dithering oscillated as shown in the figure below.

Then I found that if C1:ASS-XARM_ETM_PIT_L_DEMOD_SIG_GAIN / C1:ASS-XARM_ETM_YAW_L_DEMOD_SIG_GAIN in C1ASS_LOCKINS_XARM.adl are changed as 0.200 -> 0.100 and 0.200 -> 0.100, respectively, the dithering works well.

But the burt file that is loaded when you let dithering "ON" is not changed, because now I don't know how to update a burt file. So, if you let dithering "ON", the dithering will run with the condition that C1:ASS-XARM_ETM_PIT_L_DEMOD_SIG_GAIN / C1:ASS-XARM_ETM_YAW_L_DEMOD_SIG_GAIN are not 0.100 but 0.200.

 

   

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