A single point matrix is an available option of the switching matrix.
In a single point matrix one relay / transistor controls one contact / test point. This way, each test point can be interconnected with high and/or low value of the test voltage—independently from any other test point.
This single point control allows for more flexibility when developing the test algorithm (e.g. when selecting the test points), since each test point can be separately controlled and individually connected with any other test point, the generator and the measurement units.
In the dual point matrix, always two test points are controlled by one relay. This leads to limitations when developing test programs in the editor, especially when bundles of wires need to be tested together in one test step.