For standard NX Testers, the test points are organized in sets of 64. Each set of 64 test points is
accessible from the back of the Tester, and constitutes a uniquely numbered position.. A card edge
connector is used to interface to a set of 64 test points. The card edge connector usually has discrete
wires or a ribbon cable attached to it – the discrete wires or ribbon cable wires are attached to each
corresponding fixture block connection point or detection switch connection point.