Using a not too good BNC Tee I performed a T-Check
Attached the measurement (.s2p) and the excel file (.xlsx) in which the T-Check is calculated.
Next to the T-Check calculation the excel also calculates the abs(Zin-Zout)/Z0 (the percentage absolute distance of the two impedances as another estimate of error)
The frequency is denoted in MHz
Do ignore anything above say 500MHz
The T-Check suggests the error quickly increases to substantial levels but the abs(Zin-Zout)/Z0 suggests there is a very systematic error in my measurement where the absolute distance of the two rotating impedances grows very linear with frequency.
I did calibrate using the Tee without (OSL) and with (T) the outgoing cable connected but maybe that did result into the error.
What am I doing wrong?
