A system for analyzing a circuit includes a computer. The device includes a casing having an opening extending axially through the casing for receiving a rod of filler wire, wherein the casing comprises a feed rate selection feature that enables selection of a desired filler wire feed rate and a pull back to feed forward ratio selection feature that enables selection of a pull back to feed forward ratio. A charge directing switch is electrically connected to the non-destructive sense node. By outputting data belonging to different groups from another node, processing in plural nodes is achieved to avoid reduction in performance. The test pattern forming unit selectively switches, depending on a width of the test patterns in the main-scanning direction, whether to form each of the test patterns in a position detectable by the corresponding one of the test pattern detection units. The at least one arcuate opening is laterally displaced from a center of the at least one sensor holder such that when the at least one strength member is disposed therein the at least one strength member is substantially tube shaped and substantially coaxial with the jacket.