Abstract: Disclosed is a load carrier for use with a test chamber. Such carrier includes (a) an insertion portion having a length about equal to the thickness of a chamber wall, (b) a carrier portion extending away from the chamber and (c) a flange interposed between the portions for sealing contact with the wall. The insertion portion extends through an opening in a chamber wall to connect to a rack holding printed circuit boards. The carrier portion holds a test device connected to the circuit boards through the load carrier. The load carrier is removable and can operate in "standalone" fashion or be tested at a location remote from the chamber when another load carrier is substituted in the chamber. Chamber backplane wiring is eliminated or substantially eliminated.

Abstract: A carrier for use in testing circuit boards includes a carrier frame adapted to be mounted vertically within a test chamber and a plurality of circuit board mounting modules for supporting at least one circuit board. The circuit board carrier frame has a plurality of vertically oriented module supports provided thereon and each of the circuit board mounting modules is constructed and arranged to be releasably mounted in one of the module supports. A first electrical connector assembly is mounted on the carrier frame for being connected to a source of electrical energy and test signals and a plurality of second electrical connector assemblies are each connected in circuit with the first electrical connector assembly and are located respectively adjacent the module supports and a third electrical connector assembly is mounted on each of the modules and each is adapted to be connected to one of the second electrical connector assemblies.