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