Barbara,

Look at Patent Number 5,764,071 dated June 9, 1998. IBM is patent holder
and I was one of the author. The method allows monitoring of signals
from the opposite side of PWB for a BGA or other modules. You have to
contact IBM for permission to use the method described.

Good luck

--
_________________________
pratap singh
tel/fax: 512-255-6820
email: [log in to unmask]
WEB: www.rampinc.com

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