Advanced Trigger Dropout

welle · Post by **welle** » Tue Nov 19, 2013 11:02 am

Hi
I'm trying to trig on a active low signal (irq) witch intermittent hangs in a system. I'm using a 2205 MSO with Picoscope 6.7.35.1.
The documentation states that I should be able to select what state the trigger will fire on (low, high or either). My problem is that I can't find where to select this. The only option is "either" witch is not useful for looking for a signal stuck on low.

Post by **Martyn** » Fri Nov 22, 2013 9:09 am

Set a "Repeat" trigger, open up the "Adavnced Triggers" dialog, select "Digital", then you can set "High, Low, Rising Edge, Falling Edge, or Don't Care" for each of the enabled digital channels.

welle · Post by **welle** » Mon Nov 25, 2013 9:07 am

But then you can't set a time threshold witch I need.

I actually figured out that if I first selected Advanced Trigger - Advanced Edge I could set falling edge. After that I selected Advanced Trigger - Level Dropout. The Level Dropout will then use the setting from Advanced Edge and I have the trigger condition I want.

For me this seems more like a bug in the GUI and I would rather be able to select the level in the Level Dropout dialog.

Post by **Martyn** » Wed Dec 04, 2013 8:25 am

That should be the "Threshold" setting, with "Hysteresis", in the "Level Dropout" dialog. The pictures should explain what will cause the trigger.

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Advanced Trigger Dropout

Advanced Trigger Dropout

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Re: Advanced Trigger Dropout

Re: Advanced Trigger Dropout