2.5 GHz, 75 Ω, Dual 4x1 PXI RF Multiplexer Switch Module—The PXI‑2556 is an RF signal multiplexer switch module. The multi-bank architecture of the NI PXI‑2556 makes it ideal for test systems that require parallel operations such as the stimulus/response testing of video RF devices such as tuners. The module also features excellent insertion loss, voltage standing wave ratio (VSWR), and isolation parameters to minimize signal degradation. You can use the onboard relay count tracking feature to predict relay lifetime and reduce unexpected system downtime.