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40m
QIL
Cryo_Lab
CTN
SUS_Lab
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OMC_Lab
CRIME_Lab
FEA
ENG_Labs
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WBEEShop
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Message ID: 19
Entry time: Thu Jan 24 19:43:53 2008
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| Author: |
Stefan |
| Type: |
Electronics |
| Category: |
ISS |
| Subject: |
ISS servo work |
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- Modified ISS: Bypassed differential driver & moved 2kHz pole to the first summing opamp.
- Installed an out-of-loop diode.
- Out-of-loop noise at 90Hz: ~8e-8 RIN/rtHz
Plot 1 shows the OLG.
The loop gain was set to 150kHz - just because I
didn't have the gain adjust hooked up.
Plot 2 shows the out-of-loop intesnity noise.
It is acoustic noise limited (except for the power lines). |
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