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Entry  Thu Feb 6 16:41:31 2014, ericq, Update, General, In-Vac Alignment 
    Reply  Fri Feb 7 12:43:12 2014, ericq, Update, General, In-Vac Alignment 
       Reply  Fri Feb 7 13:00:52 2014, Jenne, Update, General, In-Vac Alignment 
          Reply  Fri Feb 7 13:30:22 2014, Gabriele, Update, General, In-Vac Alignment 
          Reply  Fri Feb 7 13:30:25 2014, ericq, Update, General, In-Vac Alignment 
Message ID: 9612     Entry time: Fri Feb 7 13:30:25 2014     In reply to: 9610
Author: ericq 
Type: Update 
Category: General 
Subject: In-Vac Alignment 

Quote:

 

 Nice work!!  As with all the other RF PDs, POP110's phase likely needs tuning.  You want POP110 (and POP22) I-quadratures to be maximally positive when you're locked on sidebands, and maximally negative when locked on carrier.  What you can do to get close is lock PRC on carrier, then rotate the POP phases until you get maximally negative numbers.  Then, when locked on sideband, you can tweak the phases a little, if need be.

Adjusted the angles as Jenne suggested:

  • POP22: 105 -> 163
  • POP110: 150 -> -83
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