A long time ago I purchased a NanoVNA V2.2 from Amazon, I later discovered this was actually a clone, the Black/Gold 3.2" clone. I remember using it for a couple of measurements with success after which it went into storage for aprox 2 years.
Now I tried to use the nanoVNA again, I upgraded firmware to 20201013-32077fd thinking that this was the issue but I keep getting garbage on CH0 trying to do a VSWR measurement.
* select frequency span 800 to 950Mhz.
* performed open, short, load calibration, saved to slot 0, checked that apply checkbox is set.
* configured CH0 for SWR.
* screen shows plot all over the place, even with short connected to CH0.
Does this mean that CH0 input is damaged?
Beware of cheap underperforming clones
As of 2023 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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NanoVNA V2.2 just noise on CH0?
Resultado de traducción
Try to unscrew the short slightly and press diagonally so that the central pin and the mass make contact with the sma of the chassis. If it shows the correct reading, it means that the connector is bad. I solved it by tinning a small amount of tin inside the tube of the female pin of the nanovna. This fills the gap and allows proper contact. All the best.
Pls report the results.
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