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Message ID: 57     Entry time: Thu Jul 21 14:58:26 2016
Author: Gabriele 
Type: Electronics 
Category: General 
Subject: Glitches are of digital origin 

So here's the final proof that the glitches I see are digital:

  • There is a positive jump (of random size) every second, every time 0.45s after the beginning of the second. There is a negative jump at a less constant time, but between 0.65s and 0.8s after the beginning of each second
  • I moved my whole setup to the crackle lab. This included: HeNe laser with power supply, QPD with cable, interface board and power supply. I don't see any glitch there

I swapped the ADC board with a second one in the new cymac, but no change: glitches are still there.


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