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40m Log |
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Fri Jun 1 14:56:08 2012, Jamie, Update, SUS, Oplevs all different, messed up
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Fri Jun 1 18:07:32 2012, steve, Update, SUS, Oplevs servo values
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Fri Jun 1 19:48:54 2012, rana, Update, SUS, Oplevs all different, messed up
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Wed Jul 11 16:19:08 2012, yuta, Update, SUS, oplev servo phiology
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Message ID: 6744
Entry time: Fri Jun 1 18:07:32 2012
In reply to: 6743
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Author: |
steve |
Type: |
Update |
Category: |
SUS |
Subject: |
Oplevs servo values |
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Quote: |
For some reason the state of the oplevs is completely different for almost every suspension. They have different sets of filters in the bank, and different filters engaged. wtf? How did this happen? Is this correct? Do we expect that the state of the oplevs should be different on all the different suspensions? I wouldn't have thought so.
I discovered this because the PRM is unstable with the oplevs engaged. I don't think it was yesterday. Is something hidden changing the oplev settings?
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As of February 23, 2012 when oplev PIT and YAW transfer functions were taken
OPLEV SERVO |
300^ 2:0 |
BR |
ELP |
RLP |
RES |
GAIN |
QPD counts |
OD mm |
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ETMY pit |
300^ 2:0 |
BR |
35 |
80 |
0.5 |
-1.5 |
15,500 |
~1 |
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ETMY yaw |
300^ 2:0 |
BR |
35 |
80 |
0.6 |
-1.0 |
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ETMX pit |
300^ 2:0 |
BR |
35 |
80 |
0.5 |
0.5 |
1,500 |
~1.5 |
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ETMX yaw |
300^ 2:0 |
BR |
35 |
80 |
0.6 |
1.0 |
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ITMY pit |
300^ 2:0 |
BR |
|
80 |
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2.0 |
15,000 |
~2.5 |
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ITMY yaw |
300^ 2:0 |
BR |
|
80 |
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-4.0 |
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ITMX pit |
300^ 2:0 |
BR |
|
80 |
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1.0 |
1,350 |
~1.5 |
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ITMX yaw |
300^ 2:0 |
BR |
|
80 |
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-2.0 |
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BS pit |
300^ 2:0 |
BR |
50 |
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0.5 |
3,500 |
~1 |
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BS yaw |
300^ 2:0 |
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50 |
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3.3 |
-1.0 |
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PRM pit |
300^ 2:0 |
BR |
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3.3 |
1.0 |
4,000 |
~2 |
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PRM yaw |
300^ 2:0 |
BR |
35 |
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3.3, 4 |
-0.5 |
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SRM pit |
300^ 2:0 |
BR |
40 |
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-2.0 |
2,600 |
~2.5 |
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SRM yaw |
300^ 2:0 |
BR |
40 |
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2.0 |
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