exact item shown, HP 5080-0305 switch, N connector common, one output port goes to an APC connector, the other to a termination network (inside the silver cylinder).  The termination is a capacitor in series with a 50 ohm resistor.  The two analyzer traces show the through and reflected path with the switch in both positions - the yellow is reflections, the blue is the through path.  The analyzer I used goes to 3 GHz, I picked that one because it has N connectors so it was easy to hook up - I'd not take the insertion loss shown to heart, it is actually low but I didn't calibrate the cable before taking the measurement - the reflections are more interesting because it shows the effect of the networki in the silver ccylinder.