Quad 1x4 50Ohm 3GHz Multiplexer Module for 34980A. The Agilent (now Keysight) 34941A RF multiplexer module for the 34980A Multifunction Switch/Measure Unit offers bi-directional switching for test signals from DC to 3 GHz. High channel isolation ensures quality dynamic range measurements with your oscilloscope, spectrum analyzer, or other instrumentation. The RF multiplexers are configured as four independent 1x4 RF multiplexers on a single module. Individual multiplexers are isolated from each other and the Mainframe chassis to prevent ground loops. Multiple banks can be cascaded together to create an even large multiplexer - up to 97 cascaded RF channels in a single 34980A mainframe. Quad 4-channel multiplexers DC to 3 GHz, 50 Ohm High isolation, low VSWR 30 V, 0.5 A, 10 W switching SMA connectors