About NanoVNA V2

NanoVNA V2 (S-A-A-2) is a low cost 4GHz T/R vector network analyzer developed by HCXQS in collaboration with OwOComm. The V2 hardware is a new from-scratch design and is not based on the earliest V1 design from edy555. Compared to earlier NanoVNA versions, V2 does not use harmonics for measurements and achieves higher dynamic range.

V2 Plus4, the latest version, reaches >90dB dynamic range and can measure duplexers (see comparisons below).

Users group and discussion forum


Official store

Official store on Tindie
NanoVNA V2

Where to buy

Only HCXQS and NanoRFE support the original developers.

As of January 2022 there are many clones being sold, many of which do not meet specifications and are highly noisy due to substituting parts without understanding the design. Some users have also reported software/firmware incompatibility. See official stores below and look for V2 Plus4 versions only to avoid getting a bad clone. See also FAQ | How to avoid a bad clone.

Official stores:

The following stores have sold at least one bad clone.

Measurement comparisons

Noise comparison

We tested a few clones of the S-A-A-2 design, some claiming higher specifications than the original. The earliest S-A-A-2 (before Plus4) was designed for 3GHz only and many have tried substituting parts to reduce cost or extending the frequency range using harmonics, but without understanding the bottlenecks of the design the result is high measurement noise, nonlinearity error, and temperature drift issues.

Here is the S11 trace noise compared to the original S-A-A-2 and Plus/Plus4 versions. The performance starts to degrade before 2GHz, and would not have passed our standard QC procedures for the earliest 3GHz V2.2 version.

LiteVNA vs V2 Plus4 noise

Note: the above plots are uncalibrated to show the amount of noise of the raw data from the hardware.

Other users have done their own comparisons with similar results. Here is the S21 noise floor:

LiteVNA and clones vs V2 Plus4 noise

Accuracy comparison

Users have compared our V2 Plus4 with professional instruments.

Here is one blog post comparing it with a Keysight FieldFox:


Comparison with HP-8753E:

https://www.dd1us.de/Downloads/Brief comparison of NanoVNA V2 with a professional VNA HP-8753E.pdf

Sample measurements (V2 Plus4)

LiteVNA vs V2 Plus4 dynamic range
LiteVNA vs V2 Plus4 measurement

Important: Zeenko is selling S-A-A-2 based designs without permission and in violation of our non-commercial license, with exaggerated specifications. The original V2_2 design was open sourced to help hobbyists learn, but Zeenko's actions force us to close source later designs. Please reconsider supporting this vendor.

User groups / Forums

Discussion forum

This is the only official users group. Be careful and note the URL is NanoVNAV2.




The specifications below apply only to devices manufactured by HCXQS or NanoRFE.
Beware of cheap clones that use salvaged or reject parts which do not meet specifications.


Board version



Frequency range

V2_2, V2 Plus

50kHz - 3GHz


V2 Plus4

50kHz – 4.4GHz


Frequency resolution




System dynamic range

V2_2, V2 Plus


f < 1.5GHz


f < 3GHz

V2 Plus4


f < 1GHz
IFBW=40Hz (20xAVG)


f < 3GHz
IFBW=160Hz (5xAVG)


f < 3GHz
IFBW=800Hz (1xAVG)

S11 noise floor



f < 1.5GHz


f < 3GHz

Sweep points


1 – 1024 points (with NanoVNA-QT software; 10-201 on device display).

Note: beware of clone unofficial firmware using calibration interpolation which compromises accuracy, especially when calibrating with test cables.


Sweep rate


100 points/s

f >= 140MHz

80 points/s

f < 140MHz

V2 Plus

200 points/s

f >= 140MHz

100 points/s

f < 140MHz

V2 Plus4

400 points/s

f >= 140MHz

200 points/s

f < 140MHz

Power supply


USB, 4.6V – 5.5V


Supply current


400mA typ, 500mA max

No charging

Battery current, charging


1.2A typ


Battery capacity


V2 Plus

User defined


V2 Plus4



Operation ambient temperature


0℃ - 45℃ *

* by design, not tested in production

Ambient temperature during battery charging


10℃ - 45℃


Note: All V2 versions switch on and off the test signal rapidly and can not measure crystals or be used as a signal generator. See FAQ. A special firmware build for the V2 Plus4 that can measure crystals is posted here: https://nanorfe.com/forum/V2-Plus4-firmware-for-measuring-crystals.html

Accuracy comparison between NanoVNA V2 and HP-8753E by DD1US

Basic usage

NanoVNA V2 Video Tutorials

VNA basics

A VNA (Vector Network Analyzer) measures the frequency dependent reflected and transmitted power of a high frequency network (RF Network).

The NanoVNA V2 measures the following:

The following items that can be calculated from these can be displayed:

Required components

To use the NanoVNA V2 for one port measurements (e.g. antenna impedance), you will need the following:

Performing measurements

The basic operation and menu structure of the NanoVNA V2 is very similar to the original NanoVNA.


User manuals

User Manual for all V2 versions

V2 Plus4 User manual by NC4BR

Menu maps

Menu Map for all V2 versions

V2 Plus4 Menu Map by NC4BR

Firmware downloads

For firmware releases go to the Hardware versions page which lists the latest stable firmware builds for each hardware variant.

There are also experimental firmware releases at downloads.

Firmware sources are at https://github.com/nanovna-v2/NanoVNA2-firmware


There are two PC programs compatible with the S-A-A-2. NanoVNA-QT is the native V2 software and allows adjustable sweep points and firmware updating. NanoVNA-Saver was originally developed for the V1 NanoVNA but now also has support for V2.


See Software downloads page.

NanoVNA-QT source code:


Schematics and PCB layout

The schematics and PCB layout files of the V2.2 version are available here:


The design is licensed under CC-BY-NC-SA and commercial use without specific permission is forbidden. You need to obtain specific written permission every 3 months to sell hardware using this design.

V2.3 and V2.4 designs are confidential and proprietary, and reverse engineering is forbidden.