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Entry  Wed Jun 3 17:04:08 2015, ericq, Update, PEM, Wilcoxon Accelerometer Huddle Test AccHuddle.jpg
    Reply  Wed Jun 10 02:50:39 2015, ericq, Update, PEM, Wilcoxon Accelerometer Huddle Test hats2Acc.png3hatcode.zip
       Reply  Mon Jun 15 16:55:39 2015, ericq, Update, PEM, Accelerometers installed MC2.jpgMC1.jpgmc2accspectra.png
          Reply  Wed Jun 17 15:31:50 2015, ericq, Update, PEM, Accelerometers fully installed IMCcoherence_Jun172015.xml.zipIMCcoherence.png
       Reply  Sun Jul 5 18:14:13 2015, Ignacio, Update, PEM, Wilcoxon Accelerometer Huddle Test 8x
    Reply  Sun Jun 21 13:21:03 2015, rana, Update, PEM, Wilcoxon Accelerometer Huddle Test 
Message ID: 11345     Entry time: Wed Jun 3 17:04:08 2015     Reply to this: 11350   11367
Author: ericq 
Type: Update 
Category: PEM 
Subject: Wilcoxon Accelerometer Huddle Test 

I've set up the Wilcoxon accelerometers on the SP table for a huddle test, to estimate their noise levels. 

They're clamped down to the table along the same axis, and their housings are in good contact, in hopes to make them as correlated as possible. 

Steve helped me move the DAQ cables from under the BS/PRM oplev table, to dropping from the cable tray above the POX table, so I could get them plugged in at the SP table. This also helps reduce the rats nest by the access connector, and is a fine location for when the accelerometers are attached at MC1 & MC2. 

A quick glance at DTT shows coherence of >0.9 from about 2-100Hz for all six. A three-corner-hat deal will provide an easy estimate of the noise floor of each one. If we feel like being fancy / accounting for possible gain differences, we could try some MISO wiener action, but that is probably overkill. 

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