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These are pictures of calibration.

Thank you!

Would someone be willing to publish a pictorial description of the calibration process.
I have read thru the English version of the manual (no photos of the Cal process at all) and am unclear how I should calibrate for a two port filter measurement.

In fact, if someone could show a two port measurement being made, that would be awesome.

Tell you what, if someone illustrates the Cal process, I will publish a two port measurement of an LC low pass Butterworth filter...
Thanks,
Bill

Still waiting for my nanovna, but bogus USPS tracking is not at all amazing.
I have had packages wrongly reported delivery to my correct address up to 4 days before actual delivery.
If you have tracking data from a successful delivery for comparison, you may note where bogus
track has missing steps. I suppose these result from wrong barcode scans...

I live in Ohio. My nanovna package tracking shows delivery to "Mailbox" in Nebraska on Saturday.
USPS "Email Us" site is "temporarily unavailable" and their phone tree is a complete FAIL.

I think this is not likely the eBay seller's fault, but an amazing USPS error, since tracking is present.
Scam or error?

Anyone with advice or comments?

Thanks, AC8FD

Has anyone been able to find an alternative program that works better than NanoVNASharp? It is severely lacking capabilities that the vna itself is capable of reading. An example is VNAJ .

Good to know, thanks.
What other settings will the saveconfig command save?

On Sat, Jun 29, 2019 at 08:40 PM, Larry Rothman wrote:

You can access additional commands by connecting the unit to your PC, opening
a terminal on the VNA's serial port and type the help command at the prompt.
You will get a list of all the commands available through the VNA's console.
I used this to calibrate the touch surface using touchcal.
Unfortunately, it doesn't store the touch calibration update.

You can store the touch calibration us saveconfig command.

Great and good luck. Have Fun. Best 73' Alan

________________________________
From: [email protected] <[email protected]> on behalf of Nuno <Nmbb77@...>
Sent: Sunday, June 30, 2019 7:14 PM
To: [email protected]
Subject: Re: [nanovna-users] Translated instructions

Workedine. Thanks. Now I can make some tests on some handheld antenas. And in a 4m antenna that was about to build.

Best 73

Workedine. Thanks. Now I can make some tests on some handheld antenas. And in a 4m antenna that was about to build.

Best 73

Works very nice. Just measured a NVIS antenna on 40 meters. Spot on with other devices. Suggest putting unit in a black box unless the Sun is hidden by a cloud.

For the HF band, suggest store pre cal freq segments to improve resolution. I use 3-10 MHz and 7-21 MHz as examples, that way easy to see the SWR null if one exists.

Alan W4AMV

On the calibrate, the firmware routine does not appear quite right.

In any case, what I found that works consistent is the following:


1. Select stimulus and start and stop frequency
2. Select CAL and then CALIBRATE
3. Connect the 50 ohm to CH0
4. Press LOAD and then PRESS ISOLN (Note these are highlighted in black at first and then ISOLN goes green)
5. Then connect a THRU cable form CH0 to CH1 and press THRU
6. The firmware takes you to DONE. IGNORE!!!!
7. Now connect an OPEN to CH0
8. Press OPEN
9. Connect a SHORT to CH0
10. Press SHORT
11. Then finally press DONE
12. And SAVE

That's it. Check and be sure that the open, short and 50 ohm are on the proper side of the chart.

Alan W4AMV

P.S. Let me know if not clear or if I missed something. NOTE, this is for the 2 trace or 2 track VNA. Not the 4 track or S11/S21 measurement device. Although I suspect the cal routine is no different.

________________________________
From: [email protected] <[email protected]> on behalf of Nmbb77@... <Nmbb77@...>
Sent: Sunday, June 30, 2019 1:29 PM
To: [email protected]
Subject: Re: [nanovna-users] Translated instructions

Hello all. I have the same instructions, plan to do someday in Portuguese. At time the most confused part is the calibration, didn’T figure yet if it take long to stabilize, if its like put open, short and load and press calibrate...

73’蝉
CT1JQJ

Hello all. I have the same instructions, plan to do someday in Portuguese. At time the most confused part is the calibration, didn’T figure yet if it take long to stabilize, if its like put open, short and load and press calibrate...

73’蝉
CT1JQJ

Thanks Larry, good info. Alan

________________________________
From: [email protected] <[email protected]> on behalf of Larry Rothman <ac293@...>
Sent: Saturday, June 29, 2019 12:40 PM
To: [email protected]
Subject: Re: [nanovna-users] Translated instructions

You can access additional commands by connecting the unit to your PC, opening a terminal on the VNA's serial port and type the help command at the prompt.
You will get a list of all the commands available through the VNA's console.
I used this to calibrate the touch surface using touchcal.
Unfortunately, it doesn't store the touch calibration update.

You can access additional commands by connecting the unit to your PC, opening a terminal on the VNA's serial port and type the help command at the prompt.
You will get a list of all the commands available through the VNA's console.
I used this to calibrate the touch surface using touchcal.
Unfortunately, it doesn't store the touch calibration update.

The PC SW reads and displays only S11, S21 so NO the full 2 port S12 and S22 would not be picked up.

Of course, just exchange those rows and you got it.

Alan

Yes, it works fine. I have had no issue loading Touchstone snp files from my simulator tool and from the nanoVNA. I am running Windows 10. Note if you have the 2 track unit you will only process s11 functions like Smith, log mag, vswr, etc... if you have 4 track then you can process s11 and s21 data.

If you read in a snp file you will be able to look at all parameters... I believe. I'll check to be sure that is true.
Alan

I think the best way to create instructions, is build your own. That is what I am doing as I use the instrument and try to get inside the developers head! Once you do this it is pretty easy to do various things over and over and get consistent results. Otherwise you find yourself experimenting endlessly till you get a reasonable working function!! Alan

Good day,

I received the unit this week and so far the out of box experience has been positive. A ham colleague who has built several other VNA's as well as he and I used big box VNA's are quite surprised by its capability.

The unit arrived with battery, still holding charge as it ran out of the box for about 45 minutes. Run time after full charge, about 2.5 to 3 hours. I suspect I have a 375 mA/hr battery in the unit.

There PC software connects easily to the nanoVNA - 2 track or S11 and provides real time measurements. I constructed a simple impedance match network and easily adjusted while monitoring the pc screen. The cal routine is a bit convoluted. So take care there! I measured there standards on the 8753 after I did a SOLT cal with my hp 3.5 mm standards. And to make a long story short, I believe there top frequency 900 MHz return loss quality is limited to about 18 dB. At VHF and below, 35 to 40 dB is easily met. So as an HF AA, quite excellent.

I would like to know if the firmware actually incorporates the SOL standards as defined polynomial coefficients or did they set the SOL standards as IDEAL. I would be happy to the extent I can, answer or discuss topics on this unit. Alan W4AMV

Hello, I am new to the group and am working through the application of the nanoVNA I received. I am doing some of this work with a ham colleague and both of us are seasoned users of VNA from various other sources. The out of box experience to this point has been excellent. I'll try to report what we have found and what deserves more attention in another message.

Thanks, Alan W4AMV

Nice description.
just before mine went in the bag for return thought I'd give the same reconfiguration of the com port a go and it was still not picked up the device so as you managed to get it to work that confirmed for me mine needs to go back.

BTW I had look at the nanovna.py code from and the example I think it is in Hz.

72

Dom
M1KTA