Mine have no "CH0" markings, without shield.
Here is test conditions for NanoVNA and NanoVNA-Q variants.
-------------------------------------------------------------------------------------
clearconfig 1234
reset
pause
offset 5000
threshold 300000000
edelay -0.00000000000001
sweep 10000 1500000000 101
cal reset
trace 0 logmag 0
trace 0 scale 15
trace 0 refpos 7.46875
trace 1 logmag 1
trace 1 scale 15
trace 1 refpos 7.53125
trace 2 delay 0
trace 2 scale 0.000000001
trace 2 refpos 3.96875
trace 3 phase 1
trace 3 scale 90
trace 3 refpos 4.03125
marker 1 20 300008000
marker 2 40 600006000
marker 3 60 900004000
marker 4 80 1200002000
resume
#dac 1922( Two variants were same DAC values / Did not changed )
-------------------------------------------------------------------------------------
* Test with latest( As of Nov.11 ) firmware variants.
* NanoVNA_0.4.0-e6035a5(Left)
* NanoVNA-Q_0.4.3-5-ga81ab10( Right )
* Both CH0/CH1 did not connect anything
What is your HW variants and your RAW traces?
