Bob Vanech asked:

>     I need some clarification on how to delineate VME type printed board
>  sizes with reference to IEC publication 297-3. They depict, for example,
>  4 sizes for a 6U board. In 297-3, I am quessing, that if I wanted anything 
>  other than the 233.35 height by 280 depth size, I would reference it
>  as a 6U-1 or 6U-2, etc board. Am I guessing correctly. Thanks in advance. 


	Bob,

	We see lots of VME-based product, along with the various derivative
	buses (such as VXI etc).  Almost without exception, they come to us
	depicted as nU-height(mm), ie 6U-280, 6U-160, etc.

	Probably exactly because the spec leads one to ask the question
	you've posed!!

	Regards,

        Jeff Seeger                             Applied CAD Knowledge Inc
        Chief Technical Officer                      Tyngsboro, MA  01879
        [log in to unmask]                               508 649 9800

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