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Entry  Tue Apr 1 22:03:44 2014, Koji, Summary, ASC, New PRM ASC is running 
    Reply  Wed Apr 2 19:50:12 2014, Koji, Summary, ASC, New PRM ASC is running 
       Reply  Wed Apr 2 23:08:51 2014, Koji, Summary, ASC, New PRM ASC is running PRM_QPD.pdfQPD_spe.pdf
Message ID: 9777     Entry time: Wed Apr 2 19:50:12 2014     In reply to: 9773     Reply to this: 9779
Author: Koji 
Type: Summary 
Category: ASC 
Subject: New PRM ASC is running 

As the designed ASC filters in this entry had too little phase margins (~10deg), I had to compromise the servo design.

The design was modified and tested again. This will be reported by a following entry.

Incidentally, I have adjusted the demodulation phases of REFL33/55/165 for PRMIsb so that the PRCL is eliminated from the Q signals.

REFL33    125.5 deg -> +136.5 deg
REFL55      45.0 deg -> +  25.0 deg
REFL165   -79.5 deg -> +  44.5 deg

This change of the demod phase for REFL165 was a bit surprising.
I did not check the sign, so it could be -135.5 deg. But still this is a bit change.

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