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Entry  Fri Apr 11 01:02:07 2014, Jenne, Update, LSC, CARM and DARM both on IR signals!!!!!!!!! onlyIRspectra.pdf
    Reply  Fri Apr 11 02:09:31 2014, Jenne, Update, LSC, CARM and DARM both on IR signals!!!!!!!!! IRlocks.pdf
       Reply  Fri Apr 11 11:58:24 2014, Jenne, Update, LSC, CARM and DARM both on IR signals!!!!!!!!! DARM_IN1_getsSmaller.pngDARM_CARM_TRX_TRY.pngCARMtransition_DARMtransition.pngDARMin_DARMout.pngCARM_DARM_in_out.png
          Reply  Fri Apr 11 12:21:27 2014, Koji, Update, LSC, CARM and DARM both on IR signals!!!!!!!!! 
             Reply  Fri Apr 11 12:32:33 2014, ericq, Update, LSC, CARM and DARM both on IR signals!!!!!!!!! 
                Reply  Fri Apr 11 14:57:53 2014, steve, Update, LSC, congratulation whenSheisHappy3h.pngmc4hArms3hrs.png
                   Reply  Fri Apr 11 16:04:31 2014, Koji, Update, LSC, congratulation 
          Reply  Sun Apr 13 13:03:34 2014, rana, Update, LSC,  
    Reply  Fri Apr 11 10:30:48 2014, jamie, Update, LSC, CARM and DARM both on IR signals!!!!!!!!! 
Message ID: 9799     Entry time: Fri Apr 11 11:58:24 2014     In reply to: 9797     Reply to this: 9800   9805
Author: Jenne 
Type: Update 
Category: LSC 
Subject: CARM and DARM both on IR signals!!!!!!!!! 

 A few time series from last night's data. 

300 seconds, starting from 1081240100, showing that as we move from ALSY-ALSX to AS55Q, the DARM error signal gets smaller.

DARM_IN1_getsSmaller.png

The same 300 seconds, showing that the CARM error signal, and the arm transmissions, are not perturbed during this transition.

DARM_CARM_TRX_TRY.png

DARM in and out, for 300 seconds, showing that the control output also gets smaller.

DARMin_DARMout.png

A slightly longer time series, ending at about the same time, but starting a few minutes earlier, showing us (1) adding a 3 count CARM offset, (2) locking the PRMI (3) transitioning CARM to sqrtinv signals, and then (4) transitioning DARM to AS55Q.

CARMtransition_DARMtransition.png

CARM and DARM in and outs, for the 500 second time chunk showing all the transitions.  Unfortunately, it looks like CARM_OUT is more noisy when it's on the sqrtinv signals, than it was on the ALS signals.  Part of this may be that we have not yet swapped the resistor in the TRY QPD, to improve the SNR in the same way that we have already done for the TRX QPD.  [EDIT, JCD:  Also, we had hard-triggered the Trans switching, so we were only looking at the QPD sum for the TRX and TRY, and the QPDs only have a few ADC counts at low transmissions, so we had poor SNR for that reason too.]

CARM_DARM_in_out.png

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