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Wed Jul 23 23:43:28 2014, ericq, Update, LSC, Locking efforts; Wrath of the Mode Cleaner
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Tue Jul 29 16:41:54 2014, Koji, Update, LSC, MC servo
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Wed Jul 30 00:42:27 2014, Koji, Update, LSC, MC servo
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Wed Jul 30 22:01:24 2014, Koji, Update, LSC, MC servo
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Message ID: 10293
Entry time: Wed Jul 30 00:42:27 2014
In reply to: 10285
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Author: |
Koji |
Type: |
Update |
Category: |
LSC |
Subject: |
MC servo |
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I used an oscillator and an oscilloscope to measure the open loop transfer function at higher frequency than 100kHz.
(I remember that I tried to use Agilent 4375A for this and failed before ... due to low input impedance???)\
Here is the update. It seems that the gain margin is not so large. We should apply low pass to prevent too large servo bump. |
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