AnsweredAssumed Answered

PLTS Impedance Variation

Question asked by mhreider on Oct 14, 2011
Latest reply on Oct 14, 2011 by odanzy
I've been working with our PE to understand what's been going on with this issue.

We're loading in our S4P data from the VNA, converting to differential time domain, an then selecting TDD11 or TDD22 and displaying it as Impedance under parameter format selection (See Tdd11Incorrect).

However, if we setup the same measurement by going to Tools > Time Domain Start and Stop Time using manual setup, we get a result akin to that on the VNA itself (See Tdd11correct).

Is there any reason we're seeing this 4-ohm shift in what otherwise should be the same exact setup method??