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Message ID: 8882     Entry time: Fri Jul 19 22:35:06 2013
Author: Koji 
Type: Summary 
Category: LSC 
Subject: Various Arm signal (Yarm) 

The StripTool plot attached below shows various arm signals measured with the Y arm cavity swept using ALS.

Yellow: TRY

Blue: ALS additive OFFSET to the error signal

Red: Raw PDH error signal (POY11I)

Purple: Linearized PDH error (POY11/TRY)

Green: 1/Sqrt(TRY)-5 (No normalization)

Inverse Sqrt of the TRY had been implemented when this LSC controller was first coded.
It is confirmed that the calculation is working correctly.

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various_arm_signal.png
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