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Entry  Tue Mar 11 15:19:45 2014, Jenne, Update, Electronics, High gain Trans PD electronics change IMG_1309.JPG
    Reply  Tue Mar 11 19:07:24 2014, ericq, Update, Electronics, High gain Trans PD electronics change SQRTINVwhitening.pdfsqrtinvWhitening.zip
    Reply  Thu Apr 17 16:04:40 2014, Jenne, Update, Electronics, High gain Trans PD electronics change 
Message ID: 9823     Entry time: Thu Apr 17 16:04:40 2014     In reply to: 9716
Author: Jenne 
Type: Update 
Category: Electronics 
Subject: High gain Trans PD electronics change 

 

 I have made the same modification to the Yarm trans PD whitening board as was done for the xend, to increase our SNR.  I put in a 2.1kOhm thin film resistor in the Rgain place.

When I was pulling the board, the ribbon cable that goes to the ADC had its connector break.  I redid the ribbon connector before putting the board back. 

I see signals coming into the digital system for both the high gain and low gain Y transmission PDs, so I think we're back.  I will re-do the normalization after Jamie is finished working on the computers for the day.

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