The original V2_2 design was open sourced to help hobbyists learn, but Zeenko’s actions force us to close source later designs.
Important: Hugen/Zeenko is selling S-A-A-2 based designs without permission and in violation of our non-commercial license, with exaggerated specifications. R&L electronics – still selling clones despite being asked not to by the original developers.The following stores have sold at least one bad clone. To get acceptable S11 measurements, the averaging has to be so high that the sweep speed is slower than even V2.2. These default to averaging and smoothing to hide the noisy performance yet still advertise sweep speed without averaging, but as seen above the noise is worse than our earliest V2.2 even with averaging enabled. Here is the S21 noise floor:īeware of clones that advertise a higher sweep speed than 100 points/s. Other users have done their own comparisons with similar results. Note: the above plots are uncalibrated to show the amount of noise of the raw data from the hardware. The performance starts to degrade before 2GHz, and would not have passed our standard QC procedures for the earliest 3GHz V2.2 version. Here is the S11 trace noise compared to the original S-A-A-2 (NanoVNA V2.2) and Plus/Plus4 versions. What we saw was worsened noise, nonlinearity error, and temperature drift issues. The earliest V2.2 version (before Plus4) that all clones are based on was designed for 3GHz only, and some clones try to extend the frequency range using harmonics without understanding the design, while substituting lower quality or counterfeit parts to reduce cost. We tested a few clones of the NanoVNA V2 design, some claiming higher specifications than the original. See official stores above and look for NanoVNA V2 Plus4 versions only to avoid getting a bad clone. Some users have also reported software/firmware incompatibility. Safe places to buy an original NanoVNA V2:Īs of February 2022 there are many clones sold under various names, many of which do not meet specifications and are highly noisy due to using incorrect or lower quality parts. TDR (time domain reflectometry) allows measuring cable length and discontinuities.NanoVNA-QT software – supports advanced calibration methods and custom calibration kit parameters allows S parameter export.High dynamic range: 90dB (V2 Plus4), achieves similar results as professional instruments can measure duplexers.
Compared to other NanoVNA versions, V2 Plus4 and V2 Plus4 Pro do not use harmonics for measurements, improving performance significantly.New from-scratch design by HCXQS/NanoRFE.NanoVNA V2 (S-A-A-2) is a 4GHz vector network analyzer (VNA) capable of measuring antennas, filters, duplexers, and amplifiers.
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