I would like to track a fault condition that happens seldom, as well as what happens around the event (5 sec before and 5 sec after). I have these two oscilloscopes available to me: MSO6012A, DSO-X 3012A.
There is a signal on my unit that goes up and down under normal conditions, but stops toggling when the fault has occurred. I want to use that as a trigger.
The problem is that if this last toggling happens when the oscilloscope's cursor is at the right edge of the screen, I will see nothing of what happened after the toggling.
What I would like to do, is for a new trigger event to reset the screen (ie appear in the center), even if the capture triggered by the previous trigger event has not filled up the screen yet.
Is there a way to do that?
There is a signal on my unit that goes up and down under normal conditions, but stops toggling when the fault has occurred. I want to use that as a trigger.
The problem is that if this last toggling happens when the oscilloscope's cursor is at the right edge of the screen, I will see nothing of what happened after the toggling.
What I would like to do, is for a new trigger event to reset the screen (ie appear in the center), even if the capture triggered by the previous trigger event has not filled up the screen yet.
Is there a way to do that?
This sounds like a good use of the pulse width trigger. You don't say what the normal state of this signal is, low or high. Assuming it's normally low, and it should go high for 100nsec every 1 usec, then I would use a pulse width trigger that looks for a negative pulse (signal going down, then up) that is wider than 1usec. These values, and maybe the polarity will change, based on your needs, but this should help.
Al
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