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Entry  Mon Jul 22 16:30:31 2013, Koji, Update, General, Vent preparation 
    Reply  Mon Jul 22 16:56:14 2013, Jenne, Update, General, Vent preparation - In progress 
       Reply  Mon Jul 22 17:03:25 2013, Jenne, Update, General, MC spot positions MCdecenter_22July2013.png
          Reply  Tue Jul 23 04:26:54 2013, Jenne, Update, General, MC spot positions MCdecenter_22July2013_lowpower.png
       Reply  Mon Jul 22 18:49:16 2013, Jenne, Update, General, Vent preparation - In progress 
       Reply  Mon Jul 22 21:23:04 2013, manasa, Update, General, Vent preparation - In progress 
          Reply  Tue Jul 23 03:10:57 2013, Koji, Update, General, Vent preparation - In progress OSEM_RECORD.pngOPLEVS.png
          Reply  Tue Jul 23 03:43:32 2013, manasa, Update, General, Vent preparation - In progress 
             Reply  Tue Jul 23 04:22:03 2013, Koji, Update, General, Vent preparation - In progress 
       Reply  Tue Jul 23 04:31:36 2013, Jenne, Update, General, Vent preparation - Ready for Vent 
          Reply  Tue Jul 23 08:21:31 2013, Steve, Update, VAC, Vent has started beforVent.pngstartVent.png
             Reply  Tue Jul 23 14:00:03 2013, Steve, Update, VAC, the vent is completed Atm.png5cyl.pngventSum1d.png
Message ID: 8899     Entry time: Tue Jul 23 03:43:32 2013     In reply to: 8894     Reply to this: 8901
Author: manasa 
Type: Update 
Category: General 
Subject: Vent preparation - In progress 

There seems to be an unexplained oscillation in X arm cavity transmission for IR when the cavity is locked using the POX error signal.

Their origin is not related to the oplevs because the oscillation does not exist when LSC is OFF and the arms are controlled only by the oplevs and OSEMs.

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