The HP 44473A Matrix Switch offers highly flexible switching with a 4X4, 2-wire matrix. Any combination of four input channels may be connected to any combination of 4 output channels. Each cross point or node in the matrix uses a 2PST relay to switch two lines (Hi and Lo) at a time. Multiple 4x4 modules can be connected to form larger matrices. Multiplexers can be used in conjunction with this module to effectively expand the number of inputs and outputs of the matrix. This unit is equivalent to option 013 of the 3488A Switch/Control Unit.
Agilent / HP 44473A