Hi Everyone. Just recently updated my NanoVNA-H 3.4 to the newest 1.2.14 SI FW by hugen79. Never had any issues with the unit since purchased in 2019ish until I updated FW so I'm assuming I have a configuration setting or something wrong. Attached is a photo of it's S21 behavior, it has a low noise floor up to it's set threshold frequency (it defaulted to 290mhz but the high noise will shift down if I reduce this value) This photo is taken after a full calibration and doesn't change if I terminate both ports into 50ohms either. Anyone have any ideas on why it's doing this?
Thank you,
Garret
