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Entry  Mon Sep 2 03:38:27 2013, tara, DailyProgress, NoiseBudget, beat zoom_beat_2013_09_02.pngbeat_2013_09_02.pngnb_short_cav.figzoom_beat_2013_09_02.png
    Reply  Tue Sep 3 09:52:17 2013, rana, DailyProgress, NoiseBudget, Seismic Noise Coupling 
       Reply  Wed Sep 4 18:40:00 2013, rana, DailyProgress, NoiseBudget, Seismic Noise Coupling 
    Reply  Sat Sep 7 04:29:32 2013, tara, DailyProgress, NoiseBudget, beat 
       Reply  Mon Sep 9 02:27:46 2013, tara, DailyProgress, NoiseBudget, RIN induced TO noise in beat 6x
          Reply  Mon Sep 9 21:19:24 2013, tara, DailyProgress, NoiseBudget, RIN induced TO noise in beat RIN_ACAV.pngRIN_ACAV.figbenid_ACAV.jpgfront_ACAV.jpg
             Reply  Tue Sep 10 04:53:34 2013, tara, DailyProgress, NoiseBudget, RIN induced TO noise in beat 
Message ID: 1327     Entry time: Sat Sep 7 04:29:32 2013     In reply to: 1321     Reply to this: 1329
Author: tara 
Type: DailyProgress 
Category: NoiseBudget 
Subject: beat 

Short note from tonight measurement:

1) scattered bump from dc to 100Hz is mostly from seismic. It is worse during the day. It gets smaller at around 3-4 am. Unless we have a better seismic isolation, we might not be able to see anything below 100Hz.

2) RIN shape from RCAV changes, reasons still unknown. (DC level 0.7 V)

3) I might see the effect from RIN induced TO noise at frequency ~ 1-3 kHz. (compare RIN and beat).

I'll get into details tomorrow.

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