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Entry  Sun Sep 23 02:22:46 2018, Gerard Arino-Estrada, Trigger OUT pulse width variable from 100 us up to 100 ms 
    Reply  Wed Sep 26 14:44:14 2018, Stefan Ritt, Trigger OUT pulse width variable from 100 us up to 100 ms 
       Reply  Wed Sep 26 18:28:20 2018, Gerard Arino-Estrada, Trigger OUT pulse width variable from 100 us up to 100 ms 
          Reply  Wed Sep 26 19:21:03 2018, Stefan Ritt, Trigger OUT pulse width variable from 100 us up to 100 ms 
Message ID: 717     Entry time: Sun Sep 23 02:22:46 2018     Reply to this: 718
Author: Gerard Arino-Estrada 
Subject: Trigger OUT pulse width variable from 100 us up to 100 ms 

Hello Stefan,

I am using the DRS4 board connected to a Raspberry PI and through the drsosc application. I am interested on using the "Trigger OUT" signal to do some extra data processing with NIM modules. According to the manual, for each hardware trigger a TTL pulse of 150 ns width should be send through the "trigger OUT". In my case I do see pulses with widths ranging from 100 microseconds up to hundreds of miliseconds. I am connecting the signal directly to an oscilloscope with 50 Ohm termination. I have tried two DRS4 boards in identical conditions and both show the same behavior.  Having such wide and variable pulses makes it complicated for me to do the extra post-processing. Have you any idea of what might be going wrong? Thank you very much.

Best regards,

Gerard

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