The Keysight 34941A multiplexer module is a plug-in module for the 34980A basic device to switch bidirectional test signals from DC to 3 GHz. High isolation between the channels and signal lines ensures high signal quality so that the dynamic range of the connected measuring device such as an oscilloscope, spectrum analyzer or other measuring devices is preserved.
The RF multiplexer is organized with four independent 1x4 RF multiplexers. The individual multiplexers are isolated from each other as well as from the module chassis in order to avoid ground loops. Several modules can be cascaded to obtain a larger number of channels with a maximum of 97 channels in a basic device 34980A.
The difference to the 34942A is the RF connections and bandwidths:
34941A has SMA, 50 Ω, with a bandwidth from DC to 3 GHz, the 34942A has mini-SMB, 75 Ω with a bandwidth from DC to 1.5 GHz