This was a fun journey/project to play with and I learned a lot. Let me share the journey with you and how you can tell if your Nano is good or not.
👉 The Trusted Source for NanoVNAs is R and L electronics in Ohio: https://bit.ly/3q3OHdN
👉 Firmware Update for NanoVNA-H: https://github.com/DiSlord/NanoVNA-D
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0:56 Touch Screen Problems
4:05 Sweep an Antenna
5:30 Comparing against a Good NanoVNA
7:20 Firmware Update #3
9:45 Switches to Center Mode?
10:38 Physical Comparison
13:24 Test Dummy Load on the K9WEN Unit
14:24 NanoVNA Test Procedure
19:00 Bad NanoVNA
23:19 Thanks for Being Awesome!