Modifications to the common mode boards of the squeezer

Document #:

LIGO-E1800074-v1

Document type:

E - Engineering documents

Abstract:

Fix the common generic filter and add a notch for the SHG/OPO PZT resonances.

Files in Document:

• E1800074-v1.pdf (file is not accessible)

Other Files:

• E1800074-v1.docx (file is not accessible)

Topics:

• Sensing and Control

Authors:

• Daniel Sigg

Keywords:

Common Mode Servo Board

Notes and Changes:

Daniel adds (via email discussions) to propagate this modification to all SQZ CMS chassis.

Notes from email discussion:
Yes, all SQZ chassis are the same and should receive the same mods.

It's true that it isn't required, but we try to keep all SQZ CM boards identical
to simplify spares.

Indeed, this notches can be bypassed remotely for these boards. Daniel

Related Documents:

• LIGO-T1800112: Servo Notch for a PZT Actuator (VOPO)
• LIGO-E1800075: ECR: Modifications to the common mode boards of the squeezer

Referenced by:

• LIGO-D0901781-v2: Common Mode Servo Assembly
• LIGO-E1200175: aLIGO, ISC, Electronics, Common Mode Servo