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 87104P is a low PIM SP4T coaxial switch, operating from DC to 4 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.