Note
Only front backplanes labelled BKP7 are compatible with V3X boards
(7 slots for 6U frames). The BKP7 backplanes (compatible with V3X
boards) have 3 rows of soldering per slot, while the backplanes
compatible with IO-E, COHD or COHU boards have 2 rows of soldering
per slot. Note that the top slot of BKP7 backplanes must always
be
connected to the H3X board.