Low passive intermodulation (PIM) is crucial for applications where two or more transmitted signals share a common antenna or whenever the transmitter signal is too high or the receiver is sensitive to high intermodulation. The Keysight 87406Q is a low PIM matrix coaxial switch, operating from DC to 20 GHz, which can help to keep the system PIM level low. A guaranteed 0.03 dB insertion loss repeatability and 3 million cycles of operating life ensures signal integrity, improves testing efficiency and ultimately maximizes test throughput.