On Wed, 07 Jul 2004 18:34:15 -0400, wrote:

|Well here's what I did: I treated it like a peice of coax. I made a
|fixture to hold the "feedthru" with semi-rigid coax on one side and a
|50 ohm chip resistor on the other. I dropped in a short peice of coax
|and cal'ed to that. Then checked VSWR, was about 1.00something. Then I
|took out the coax, dropped in a few feedthrus and got VSWRs about 1.04
|- 1.06, which works out to about 53 - 55 ohms or so.
| How's that sound?

Like you don't know what you're doing.

Your DUT is a two-port device. If you really have a network analyzer,
why aren't you using it to measure the device as a two port?