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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: 9800     Entry time: Fri Apr 11 12:21:27 2014     In reply to: 9799     Reply to this: 9801
Author: Koji 
Type: Update 
Category: LSC 
Subject: CARM and DARM both on IR signals!!!!!!!!! 

About the ADC range,

According to the elogs, DARM = AS55Q/400. So in the current level, the error has +/-40cntpp (even if I ignore the whitening).

The arm transmission this time was 0.1-0.3. This will go up to 100~300. So we potentially increase the AS55Q optical gain by factor of 1000.

So we get +/-40000. This is already too much. If we consider the whitening, the situation is more tough.

We need to lower the whitening gain. If it is not enough, we need to lower the power on the PD.

How much was the whitening gain for AS55 this time?

Quote:

 DARM_IN1_getsSmaller.png

 

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