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Entry  Tue Apr 28 16:36:24 2009, rob, HowTo, Locking, setting the RF CARM demod phase CARM_phases_REFL.pdfSRCL_phases_REFL.pdf
    Reply  Tue Apr 28 17:51:13 2009, rob, HowTo, Locking, setting the RF CARM demod phase XARM_phases_POX.pdfCARM_phases_POX.pdf
Message ID: 1530     Entry time: Tue Apr 28 17:51:13 2009     In reply to: 1529
Author: rob 
Type: HowTo 
Category: Locking 
Subject: setting the RF CARM demod phase 

Quote:

To set the demod phase for RF CARM, sensed at REFL2 (REFL 166I), it suffices to set the demod phase for REFL2 to be the optimal phase for controlling SRCL in a no-arm state.

 

For POX33, the ideal phase for single arm locking does not yield a zero-offset CARM signal.  So the offset needs to be manipulated digitally. 

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