LIGO Document E1800338-v2

Modifications to the CM board (Refl servo)

Document #:
LIGO-E1800338-v2
Document type:
E - Engineering documents
Other Versions:
LIGO-E1800338-v1
26 Feb 2019, 09:39
Abstract:
The common mode servo of the interferometer suffers from noise in the DAQ readbacks that are due to large high frequency signals. There is also a lack of boost filters to squash the low frequency noise below 100Hz.
Files in Document:
Other Files:
Authors:
Notes and Changes:
Change:
- Add extra gain of 5 to error DAQ readback (R56)
- Add extra 15kHz poles to slow & fast DAQ readbacks (C242 and C293)

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