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Partial De-Embedding - Removing Effects of a Bad Launch

Question asked by VNA123 on Mar 21, 2016
Latest reply on Mar 22, 2016 by Dr_joel
Hello All!

It's been quite sometime since my last post. I am in dire need of help with cable measurements and achieving a quality *s4p model* of a differential cable transmission line. I'm going to simplify the issue:

1) I measure a cable(a few meters) with test fixtures.
2) I de-embed the measurements with accurate models of the test fixture.
3) Due to the nature of "raw" cable measurements, even after de-embedding there are STILL an unwanted differential discontinuities on both sides DUT.

Section 5.1.3 of Dr. Joel's book talks about attenuation measurements and methods to compensate for bad launches. I've applied his gating techniques and formulas all the time and have gotten great results.

BUT, this was to achieve a TRACE (e.g. a csv type data array) of attenuation values.

I want to take this technique to the next step and actually create a nice TOUCHSTONE FILE out of this, for use with cascading elements to see the overall response of a channel.

Can PLTS do this? I've been searching for this ability for so long.

Please help!