Beware of cheap underperforming clones
As of 2022 there are many badly performing clones on the market. V2/3GHz NanoVNA uses parts like ADF4350 and AD8342 which are costly and clones have been cutting costs by using salvaged or reject parts.
See official store and look for V2 Plus4/V2 Plus4 Pro versions only to avoid getting a bad clone. We have stopped selling V2.2 versions since October 2020, so all V2 hardware that are not Plus or Plus4 are not made by us and we can not guarantee performance.
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QEX Article by G3TMG
Bob W0EG 2022/06/24 13:15
Wery good highly detailed article in the July/August edition of QEX "Improved Low-Loss Measurements with a NanoVNA".
Experiments determine how to reliably measure low valued insertion losses using the NanoVNA.
The author describes the advantage of doing a one port measurement on the DUT terminated with open and short vs. typical S21 for insertion loss.
The two measurements are averaged and taken as twice the insertion loss.
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