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Entry  Wed Nov 28 23:18:35 2012, Charles, Update, PEM, Decreased RMS in Seismometers 8-31_11-29_PEM-RMS.jpg
    Reply  Thu Nov 29 02:43:48 2012, Ayaka, Update, PEM, Decreased RMS in Seismometers GUR1Xfilterbank.pngseismometers1129.jpgseismometers1129.pdf
       Reply  Thu Nov 29 09:58:06 2012, Den, Update, PEM, Decreased RMS in Seismometers 
          Reply  Tue Jan 29 14:34:42 2013, Jenne, Update, PEM, Secret Seis filters  
Message ID: 7763     Entry time: Thu Nov 29 09:58:06 2012     In reply to: 7762     Reply to this: 7954
Author: Den 
Type: Update 
Category: PEM 
Subject: Decreased RMS in Seismometers 

Quote:

[Den, Ayaka]

We found that seismometer was working and the calibration in the filter banks should have been wrong.
We turned off the all FM2 filter in RMS filter banks.
 

We also installed STS seismometer. It is under the BS. Now we have spectrum of three seismometers;
 

RA: the above plot is kind of unreadable and useless. Please replace with something legible and put in some words about why there is a wrong filter, what exactly it is, etc., etc. etc. And why would you leave in a filter which is not supposed to be on? We might as well leave a few secretly broken chairs in the control room...

 First of all, STS-2 is in the end of X arm, GUR2 is under BS, GUR1 is in the end of Y arm.

BLRMS were small because we applied calibration from counts to um/s two times. In the past we had calibration in the RMS BP filter bank (vel2vel = FM2). Now we have calibration in the seismometer input filter bank so we can save calibrated _OUT channels.

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