40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  Coating Ring-down Measurement Lab elog  Not logged in ELOG logo
 List  |  Find  |  Login  |  Help 
Entry  Fri Jun 24 17:03:47 2016, Gabriele, Electronics, Daily Progress, QPD electronics 2016-06-24_16.31.48.jpg2016-06-24_16.31.52.jpg
    Reply  Tue Jun 28 10:17:28 2016, Gabriele, Electronics, Daily Progress, QPD electronics 
Message ID: 24     Entry time: Fri Jun 24 17:03:47 2016     Reply to this: 25
Author: Gabriele 
Type: Electronics 
Category: Daily Progress 
Subject: QPD electronics 

Between yesterday and today I populated one QPD board (based on D1600196), and started testing it. The transimpedance stages seems to work fine (they show about 5-6 V in ambient light). However the whitening stages show a large ~100 kHz oscillation. While trying to fix it I probably burnt one of the output drivers.

I'll continue the investigations and debugging on Monday.

ELOG V3.1.3-