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Entry  Wed Mar 13 03:12:47 2013, Manasa, Jenne, Update, Locking, TWO arms TWO colors 
    Reply  Wed Mar 13 08:34:33 2013, yuta, Update, Locking, TWO arms TWO colors 
       Reply  Wed Mar 13 16:29:25 2013, Manasa, Update, Locking, TWO arms TWO colors 
    Reply  Wed Mar 13 10:26:58 2013, Manasa, Update, Locking, We're still good!! 
    Reply  Mon Mar 25 15:01:33 2013, Manasa, Update, Locking, TT1 drift 
       Reply  Mon Mar 25 15:24:41 2013, rana, Update, Locking, TT1 drift 
Message ID: 8289     Entry time: Wed Mar 13 16:29:25 2013     In reply to: 8283
Author: Manasa 
Type: Update 
Category: Locking 
Subject: TWO arms TWO colors 

Quote:

- If X green lock is not tight, maybe temporarily increasing loop gain helps. This can be done by increasing the amplitude of the frequency modulation or increasing green refl PD gain. Also, if X green beam spot is too wiggly compared with Y green, it is maybe because of air flow from the air conditioner (elog #6849). I temporarily turned it off when I did X green steering last summer.

- Did you have to re-align TRX path? We moved the harmonic separator on X end table horizontally to avoid IR TRX clipping before beam centering on X arm (elog #8162). I wonder what is the current situation after the beam centering.

 - We tried locking with the air conditioning switched off at the X-end

- TRX path is unaltered (IR still goes through the center of the harmonic separator.

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