A testing unit including a substrate, a plurality of vias located in the substrate, a plurality of pin traces having a height and a width and each extending from a respective via towards an edge of the substrate and terminating at an end point, a plurality of termination points adjacent to the end points of the pin traces, a plurality of end traces having a height and a width with each end trace extending from an end point of a respective pin trace towards to a corresponding termination point near to the pin trace, a plurality of traces extending from the end of a respective end point or termination point to the edge of the substrate.