015-0385-00
The Tektronix 015-0385-00 is a diplexer to be used with 492, 494, 494A, and 2794 spectrum analyzers to connect external waveguide mixers such as the WM490.
It comes with a semi-rigid SMA-cable and a TNC to SMA adapter to fit the 1st LO out and IF in connectors of the spectrum analyzer.
The waveguide mixer is connected through a single SMA cable that carries LO and IF signals.