Patent ID: 7388366
Filing Date: 2008-06-17
Classification: G01R

Abstract:
1. A connection system for connecting test equipment to a device under test (DUT), said system comprising; a first pair of equal-length triaxial cables, each having a desired characteristic impedance between a center conductor and an outer conductor, the outer conductor of each first cable being connected to each other at respective proximal and distal ends of said first cables, the distal end of each first cable center conductor being connected to each other, and the distal end of each of a first cable intermediate conductor being connected to each other; and a second pair of equal-length triaxial cables, each having said desired characteristic impedance between a center conductor and an outer conductor, the outer conductor of each second cable being connected to each other at respective proximal and distal ends of said second cables as well as to the respective proximal and distal ends of the outer conductors of the first cables, the distal end of each second cable center conductor being connected to each other, and the distal end of each of a second cable intermediate conductor being connected to each other, wherein four-wire measurements are made using each of said triaxial cables individually and two-wire measurements are made using each pair of cables in parallel thereby providing a characteristic impedance equal to said desired characteristic impedance, said DUT being locatable at the distal end of said cables.