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Message ID: 632
Entry time: Thu Jul 3 16:18:51 2008
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| Author: |
rob |
| Type: |
Summary |
| Category: |
Locking |
| Subject: |
specgrams |
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I used ligoDV to make some spectrograms of DARM_ERR (1), QPDX (2), and QPDY (3). These show the massive instability from 30-40Hz growing in the XARM in the last two minutes of a reasonably high power lock (arm powers up to 30). It's strange that it only shows up in one arm.
CARM is on PO-DC, for both the MCL and the AO path.
DARM is on AS166Q.
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