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Jon Titus
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Re: Part IV: Fundamentals of Digital Debugging
Jon Titus   1/19/2012 6:07:26 PM
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Q:  Can you speak about intermintant problems

 

A:  Very difficult to troubleshoot.  Like taking your car to a dealer for service, but of course the car runs fine when they test drive it.  I'd try to find a signal that glitches or changes state due to the intermittent and use it to trigger a storage scope that connects to a few test points.  Using pre-trigger record lets you acquire data before the trigger so you might detect what causes the intermittent problem.  OK, how do you collect data before a trigger? The scope continues to acquire data and saves the last X samples.  When it gets a trigger it haves those X samples and continues to acquire data for a period (Y) that you set.



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