The logic analyzer interface assembly connects to a unit under test (UUT). The interface assembly includes an interface board having interface contact points matching the pattern of the UUT contact points. The interface board is mounted to a transfer interface including a probe plate and multiple spring loaded probes extending through the probe plate. The probes contact the UUT contact points at one end and the interface contact points at the other end. When assembled, the UUT and interface assembly form a sandwiched testing assembly that can be inserted into a chassis to aid in approaching an “at speed” observation opportunity.