I have 2 C-Series bandpass cavities, with individual I.L. set at 1.0 db each. When I couple them together and measure, I get a total I.L. of 2.9 db. I should see something like 2.1 or 2.2. I have measured the coupling cable and see < .1 db, so the cable is good. Anyone have an idea why the loss is so high when coupled?
lh
