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Entry  Wed Jun 1 22:29:01 2016, Dominik Neise, problems when stop cell >= 767 ?? stop_cell_distribution.png
    Reply  Wed Jun 1 23:16:01 2016, Stefan Ritt, problems when stop cell >= 767 ?? 
Message ID: 526     Entry time: Wed Jun 1 22:29:01 2016     Reply to this: 527
Author: Dominik Neise 
Subject: problems when stop cell >= 767 ?? 

Hello Stefan,

some colleages told me a story, I was neither able to confirm nor find anything in the datsheet about. According to them:

For some internal reason of the DRS4, if the “stop capacitor” of the DRS4 is >= 767, the true stop channel is one before the stop channel read from the DRS4. In other words, the stop channel which returns the DRS4 shifts after sampling to the capacitor ID 766.

Can you confirm that, or even say a few words about that matter?

I wanted to confirm this by plotting the stop cell distribution for random triggered data, taken with one of the FACT boards. I assumed (possibly misunderstanding the matter), that this would lead to missing values in the area of stop cell 767, but cannot see any significant excess or lack of entries in that area.


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