An apparatus for conditioning signals output from a computer system expansion card to a computer system board to test system board bus specifications and timing limits. The apparatus comprises two signal conditioning extension cards which are used to condition signals from a slave card and a bus master...http://www.google.se/patents/US5448699?utm_source=gb-gplus-sharePatent US5448699 - Apparatus with leading edge delay circuit for selectively sending a delayed substitute version of a signal transmitted between an expansion card and a system bus
