Kurt,
It appears (in my limited understanding) the poor matching to Z0 of CH1 (port 2) is the biggest reason why the T-check is not performing well on the nanoVNA.
Would you agree that using a 10dB attenuator between DUT and CH1 (port 2) would solve most of this?
What would be the impact of the remaining non-compensated delay?
Should we add to the instructions that, for best nanoVNA 2 port DUT measurements one should seriously consider using a 10dB attenuator between DUT and CH1 (port 2) till new HW becomes available that solves the poor matching of CH1 (port2)?
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NanoVNA Wiki:
/g/nanovna-users/wiki/homeNanoVNA Files:
/g/nanovna-users/filesErik, PD0EK
