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Entry  Wed Jan 6 22:47:41 2021, gautam, Update, ALS, Noisy ALS ALSX_excess.pngbudget.pdf
    Reply  Thu Jan 7 19:16:11 2021, gautam, Update, ALS, Noisy ALS ALS_ERR_MON.pdfAUXnoise.pdf
       Reply  Thu Jan 7 20:07:27 2021, Koji, Update, ALS, Noisy ALS 
          Reply  Thu Jan 7 21:16:22 2021, gautam, Update, ALS, Noisy ALS 
             Reply  Thu Jan 7 23:25:19 2021, Koji, Update, ALS, Noisy ALS 
          Reply  Fri Jan 8 20:01:11 2021, gautam, Update, ALS, Noisy ALS ALSX_IR_green.pdf
Message ID: 15754     Entry time: Thu Jan 7 21:16:22 2021     In reply to: 15753     Reply to this: 15755
Author: gautam 
Type: Update 
Category: ALS 
Subject: Noisy ALS 

I thought about it, but wouldn't that show up at the AUX PDH error point? Or because the loop gain is so high there we wouldn't see a small excess? I suppose there could be some clipping on the Faraday or something like that. But the GTRX level and the green REFL DC level when locked are nominal.

Quote:

How about resurrecting the PSL table green beat for the X arm to see if the non-fiber setup shows the same level of the freq noise (e.g. the PDH locking became super noisy due to misalignment etc).

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