National Instruments ( has added PXI and SCXI microwave multiplexing switch modules to its portfolio of modular PXI instruments. The firm's PXI-2595 and SCXI-1195 5-GHz switches and the PXI-2594 and SCXI-1194 2.5-GHz switches are ideal for accurate RF signal routing in telecommunications, military/aerospace, and automated test applications. When combined with the company's Universal Serial Bus (USB) Switch Mainframes, these PXI and SCXI switches form a cost-effective, plug-and-play solution that easily integrates with external RF equipment and personal computers.