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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Notes about NanoVna Saver and V2 Plus4 #nanovna-saver


Leif M 2022/11/27 11:47

I got the SW working on my W10 PC. I had to delete all Cypress drivers.
Is it possible to get a screen capture from NanoVna? Probably not, because it only shows USB MODE text.
Do I really have to calibrate everything again. No calibration from NanoVNA?

I want to get delay working. I have connected a small length of coaxial to a calibrated port, and want to put some suitable delay to compensate that coax. It works upto 300MHz, but higher than that, and errors grow. Saver wants picoseconds only, it gets now 8190ps. I can't get a screen capture now. The final coal is to measure small coils in PCB.

Regards
LM

Jim Lux 2022/11/28 06:32

On 11/27/22 11:47 AM, Leif M wrote:
> I got the SW working on my W10 PC. I had to delete all Cypress drivers.
> Is it possible to get a screen capture from NanoVna? Probably not,
> because it only shows USB MODE text.
> Do I really have to calibrate everything again. No calibration from NanoVNA?

You can either calibrate the NanoVNA or calibrate in NanoVNASaver or
both. NanoVNA-Saver allows you to have multiple sweeps concatenated so
you have smaller frequency steps for the same range.

The important thing is that the VNA is in the same calibration state
when you run N-saver as when you did the N-saver calibration. That is,
if uncalibrated, do a reset on the VNA to remove the cal; if it was
calibrated from 0-300MHz when you ran the N-saver cal, then the VNA
needs to use that cal when you make measurements,

>
> I want to get delay working. I have connected a small length of coaxial
> to a calibrated port, and want to put some suitable delay to compensate
> that coax. It works upto 300MHz, but higher than that, and errors grow.
> Saver wants picoseconds only, it gets now 8190ps. I can't get a screen
> capture now. The final coal is to measure small coils in PCB.

Why not do your cal with the standards at the end of the coax?

8000 ps is 8 ns, which is a couple meters of coax.

Leif M 2022/11/28 11:59

Hi
I can see the option to use the calibration in NanoVna.

"Why not do your cal with the standards at the end of the coax?"
Now it would be easy calibrate at the end of coax, true. But in the in end I want use the method move measurement to device base, or some other tight place. I think I can put a short or open in tight place but all three SOL would be too much. Open would easiest I think.

"8000 ps is 8 ns, which is a couple meters of coax.
Yes but does the PC software understand ns =nanoseconds. I have about 0.95m LMR195 coax. 8ns seems to give good results.

"

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