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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Saver not usable under Windows7 - Why? #nanovna-saver

Istvaan 2022/11/27 04:40

I received original NanaoVNA v2 plus5 now (not plus4 pro)

Firmware updated to 20220814...

I try to connect under Win7 (64bit)

Visual C++ installed
CypressDriver - installed

Com port not detected at all in the Saver app:

I can run the Saver app till 0.3.9 but not conect to the device (from the 0.4.0 version just run under win10)
refresh not help...

The Nano VNA-QT (20200507) connecting, - working (the newer version v1.1 not working under win7)

(The App version 1.1.209 OneOfEleven mod by DiSlord also conecting)

The Saver app why not usable under win7?

Dave VE3TLY 2022/11/27 09:22

I resolved a similar problem with Win10 PCs by removing the Cypress drivers and allowing native Microsoft drivers to load instead. It might be worth a try. Good luck.

Dave (G1OGY) 2022/11/27 17:22

Suggest to try to reset PC's COM ports so that your device enumerates as a
port at COM9 or below.
two-figure COM ports can be a problem for some software/drivers.

Dave, G1OGY

On Sun, 27 Nov 2022 at 15:05, Istvaan <> wrote:

Istvaan 2022/11/27 20:54

Now the device on the Com3 port; and the probleme is the same...

Istvaan 2022/11/27 21:17

Win7 not have native driver for this device

(if I disable the online driver search and uninstall and delete all the cypress drivers not working under NanoVNA-QT too)

In the device manager: "CDC-ACM Demo" is the first recognised device and then installing two drivers (from online database or previously installed (CypressDriverInstaller_1.exe) - if I allow ... or I won't stop)

this picture from the probleme is not wisible anymore after edited the first post, so I upload it again:

Istvaan 2022/11/27 22:31

After I read this:,,,20,0,0,0::recentpostdate/sticky,,,20,2,0,91683416,previd%3D9223372036854775807,nextid%3D1666006494241305017&previd=9223372036854775807&nextid=1666006494241305017

I downgraded the fw to version 20211227 the "Saver" sw recognised the device but looks like only 50dB noise floor and the NanoVNA LCD shows this is V2Plus4 (not a plus5 or pro what it should be)

What's going on?

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