The 40-739-002 (PXI) and 42-739-002 (PXIe) are dual 16-channel 2-pole multiplexers designed specifically for physical layer multiplexing or demultiplexing differential signals that conform to the MIL-STD-1553 specification. The module can be supplied as a single or dual 16-channel 2-pole multiplexer with each signal pair having a controlled 78 Ohm differential impedance.

The module is ideal for the testing of multiple devices that use a serial communication interface, allowing the test system to select one target device from many. The design is bi-directional to permit use as a multiplexer or de-multiplexer with no impact on performance. The module uses long lifetime electromechanical relays characterized for use in communications systems.