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NanoVNA2


Vincenzo Mone 2020/08/08 17:28

Hello this is my first post.
I own from a couple of days a NanoVNA2. Please anybody can tell me if there is a step by step procedure or can tell me how to measure the SWR of an antenna at 2.4GHz?
I did not have any manual or cd when I received it
Thanks in advance

73's de Enzo IK8OZV
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CT2FZI 2020/08/08 08:50

Ciao Vicenzo,

Please check group homepage: https://groups.io/g/NanoVNAV2

User manual is online: https://github.com/nanovna/NanoVNA-QT/raw/master/ug1101.pdf

Basically you have to calibrate your V2 in the frequency range of interest and after that connect the antenna to the S11 port (ch0) and check for ressonance/SWR.

All the best

Luis CT2FZI

Vincenzo Mone 2020/08/08 18:25

Hola Luis,
Thanks for your replay.
Honestly I am noticing the all the videos I saw on internet it looks like
The NanoVNA2 are different and cannot understand .
Attached is the one I have.
Unfortunately it does not have any description on it like Port numbers.
I have tried to follow a video on YouTube but it shows a different type of NanoVNA. He has done a test on a 40m
Band antenna while I want to test my 2.4Ghz one if I have SWR or not.
Thanks


73’s de Enzo IK8OZV
EasyLog 5 BetaTester
EasyLog PDA BetaTester
WinBollet BetaTester
D.C.I. CheckPoint Regione Campania
Skype: ik8ozv8520




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CT2FZI 2020/08/08 10:43

The videos from YouTube are a great option for you to understand.

It does not matter what nanoVNA model they are using, the principle is the same, including the user interface it's common to all the models...

Read the user manual. The port of interest is the one on the left for your use case.

Vincenzo Mone 2020/08/08 20:20

Luis.
I have tried to follow a video but using for my purpose.
Attached is the result.
Does it say something to you?
Mucho obrigado

73’s de Enzo IK8OZV
EasyLog 5 BetaTester
EasyLog PDA BetaTester
WinBollet BetaTester
D.C.I. CheckPoint Regione Campania
Skype: ik8ozv8520




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****** GSM +39 328 7110193 ******
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CT2FZI 2020/08/08 20:27

Hello again

Yes...

The chart should show SWR in one of the traces (top right corner change
mag(21) to SWR or VSWR.

Try it.


A sábado, 8/08/2020, 19:21, Vincenzo Mone <vimone@alice.it> escreveu:

MarkZ 2020/08/09 04:19

You might read through the three posts here: https://hexandflex.com/2019/08/31/getting-started-with-the-nanovna-part-1/ . They go at a fairly slow pace and although the v2 is a little different in firmware the third section about using nanovna-saver is slightly dated but otherwise accurate and very much in line with what you're doing.

-Mark

Reinier Gerritsen 2020/08/10 18:50

Hi Vincenzo,

Your calibration looks wrong. S11 cannot be >1 (curve outside the Smitch
chart) for a passive antenna. As far as I can see, you don't have
anything connected except for maybe an RF adapter or a very short piece
of coax.
If you are not experienced with network analyzer, you'll have a hard
time to make sure your measurement shows the real situation. A VNA will
always show some results, but it is very easy to make errors.
At the low MHz frequencies this is all much, much easier to do than at
2.4 GHz. You'll have a steep learning curve ahead if you have to start
from zero. Rule number one: make sure you have your instrument
calibrated at the reference plane that you want.
Part of the problem is that the non-ideal parameters of the calibration
kit are unkown, treating them as perfect open, load and short will give
significant errors at 2.4 GHz. Maybe in this forum there are some
answers to these question, I still have 3754 unread emails...

Happy VNA-ing!


Op 8-8-2020 om 20:20 schreef Vincenzo Mone:

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