Works with "get sigs", but not in test

Works with "get sigs", but not in test
« on: November 22, 2011, 09:42:47 AM »
Hey!  Howdy!   

Curtis. . . . ?  Running a test, go to the troublesheet, have opens.   Commence debug, right-click, select "get sig," and SHAZAM!  Signature. 

Sooooooooooo.  What am I doing (or not), that is causing my prober to not get signatures during the test (quite a few components) yet get'em just fine during debug right-clicking?     

Oh!  And how are ya?  How's life in the big city? 

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  • Huntronian
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Re: Works with "get sigs", but not in test
« Reply #1 on: November 22, 2011, 12:45:14 PM »
Hey there!
Life in the big city? Pretty good. How are things in America's heartland?

Assuming that probe placement is perfect (which I am sure it is)...

My first thought is that the PCB may be bouncing slightly. Make sure it is well supported from underneath.
It could also be a probe tip that is wearing out.
Is Opens Recheck enabled (Tree pane/Components tab)? If yes then maybe setting it to 48 mils may help.
I will add more if I think of anything else.

The most important troubleshooting tool is your eyes.