Abstract: In the testing of a digital test system (e.g. the automatic testing of a digital integrated semiconductor circuit) it is necessary to provide a plurality of clock signals (periodic pulse signals), each with a definite phase relationship to a particular clock signal called the "reference". For example, when the clock signals are all in the same phase they define a common wavefront without skew.

Abstract: An anchor fitting assembly for attaching a full width partition, having a door opening, to the fuselage structure of an airplane for dividing a passenger area into two or more compartments. During installation of the partition, provisions are made to allow the lower attachments, of the partition to the seat tracks in the floor of the compartment, to have a certain amount of freedom of movement in both the inboard/outboard and up/down directions. This floating action in the attachment is required for absorbing fuselage deflections due to flight loads imposed on the floor beams and in some cases due to torsional deflections of the wing torque box to which the seat track is fixedly attached, in order to maintain a square door opening.