Early app for the NanoVNA

Rune Broberg All Messages By This Member #1513 Hi, after having a play with the NanoVNASharp software, I had two small annoyances: 1) It only used 101 data points, which didn't give me the resolution I was looking for, 2) It wasn't open source. Someone made a very nice tool that seemed to address the first concern, but it was based on Labview, and a release did not seem forthcoming. So I've hacked together a little Python app which remedies at least those two concerns: It reads data from the NanoVNA and displays both a Smith chart and LogMag(?) displays for both S11 and S12, with as many points as you can be bothered waiting for. It allows exporting S11 to s1p Touchstone files (and I'll make it export s2p files soon, but probably not today.) It has two markers that can be placed at specific frequencies, and shows impedance and VSWR at those frequencies. But most importantly: It's something the community can build on. I hope this is of some use to the community. I'll gladly accept code changes, improvements, suggestions, bug reports etc. The readme already has a small list of things I want to do with it :-) -- Rune / 5Q5R
CT2FZI All Messages By This Member #1515 Great job! I will beta testing it for sure! Cheers, Luis, CT2FZI
[email protected] All Messages By This Member #1517 Very nice job! Tried on a windows 10 (64bit) and running fine. Marcel
Vince Rooney All Messages By This Member #1518 Thank you Rune! Will be checking it out too. 73 KC2ISE toggle quoted message Show quoted text On Aug 30, 2019, at 5:22 AM, SPACE OPQA <spaceopqa@...> wrote: Great job! I will beta testing it for sure! Cheers, Luis, CT2FZI
[email protected] All Messages By This Member #1519 Hi Rune I am not familiar with Python but I will give a try I just dowload the Python Software for the MAC and Python is working. Which of you files shall I start? I would like to thank you for the effort and I have an idea. When the measurments are done. I would like to use this information to calculate what kind of adjustments is needed to tune the antenna on the required frequency. input is the frequency plus the values of the measurment . Output is the values of the Variometer and coil when needed or extend/decrease the antenna by X amount of meter Do you think it is possible ?
Rune Broberg All Messages By This Member #1520 The file to run is nanovna-saver.py. You need to have installed "PyQT5" and "pyserial" first - I believe you can run "pip3 install pyqt5" and "pip3 install pyserial" to do so. Maybe Marcel can explain it better than I can, since he got it running ;-) I believe it is possible to make a program like the one you describe, but I'm not savvy enough at impedance calculations to make it yet. I'm sure there are others on this list who could! And thank you all for the encouragement - it certainly motivates me to keep working on it! -- Rune / 5Q5R toggle quoted message Show quoted text On Fri, 30 Aug 2019 at 13:54, <nano@...> wrote: Hi Rune I am not familiar with Python but I will give a try I just dowload the Python Software for the MAC and Python is working. Which of you files shall I start? I would like to thank you for the effort and I have an idea. When the measurments are done. I would like to use this information to calculate what kind of adjustments is needed to tune the antenna on the required frequency. input is the frequency plus the values of the measurment . Output is the values of the Variometer and coil when needed or extend/decrease the antenna by X amount of meter Do you think it is possible ?
K4FMH All Messages By This Member #1521 He may need to a install pip first...not always installed with python. Frank --- Frank M. Howell, PhD Ridgeland, MS frankmhowell (at) hotmail.com --- toggle quoted message Show quoted text On Aug 30, 2019, at 7:00 AM, Rune Broberg <mihtjel@...> wrote: The file to run is nanovna-saver.py. You need to have installed "PyQT5" and "pyserial" first - I believe you can run "pip3 install pyqt5" and "pip3 install pyserial" to do so. Maybe Marcel can explain it better than I can, since he got it running ;-) I believe it is possible to make a program like the one you describe, but I'm not savvy enough at impedance calculations to make it yet. I'm sure there are others on this list who could! And thank you all for the encouragement - it certainly motivates me to keep working on it! -- Rune / 5Q5R On Fri, 30 Aug 2019 at 13:54, <nano@...> wrote: Hi Rune I am not familiar with Python but I will give a try I just dowload the Python Software for the MAC and Python is working. Which of you files shall I start? I would like to thank you for the effort and I have an idea. When the measurments are done. I would like to use this information to calculate what kind of adjustments is needed to tune the antenna on the required frequency. input is the frequency plus the values of the measurment . Output is the values of the Variometer and coil when needed or extend/decrease the antenna by X amount of meter Do you think it is possible ?
hwalker All Messages By This Member #1527 Hi Rune. Your contribution to the nanoVNA community is really appreciated. I have a question for you. When you divided the test frequency range into multiple sweeps to increase resolution from 101 points, how did you get around the issue that you lose calibration and accuracy whenever you change start and stop frequencies? I would suspect the error to be small for s21 measurements, but phase measurements could be suspect. I haven't loaded Python on my machine yet or I would have tried to answer my own question before bugging you. Tks
Rune Broberg All Messages By This Member #1529 As I understand the firmware, it interpolates between the calibration points. But I do get some absolutely horrible results around the frequency where it transitions to using harmonics (270MHz for my 800MHz firmware). But I haven't done anything to address it. I suppose it would be possible to calibrate in the software with a large amount of points, and use that calibration when running the sweeps. But I don't know enough about these corrections to say how, or to implement it. Suggestions, instructions or links to good resources would be appreciated. My goal has been for the project to be open to community participation and contribution, unlike the previously available software. And again, thank you for your appreciation. :-) -- Rune / 5Q5R toggle quoted message Show quoted text On Fri, 30 Aug 2019 at 15:18, hwalker <herbwalker2476@...> wrote: Hi Rune. Your contribution to the nanoVNA community is really appreciated. I have a question for you. When you divided the test frequency range into multiple sweeps to increase resolution from 101 points, how did you get around the issue that you lose calibration and accuracy whenever you change start and stop frequencies? I would suspect the error to be small for s21 measurements, but phase measurements could be suspect. I haven't loaded Python on my machine yet or I would have tried to answer my own question before bugging you. Tks
Harry McGavran Jr All Messages By This Member #1535 I'm not a python wiz, but when I try this on Ubuntu 16.04 with either python or python3 I get: File "NanoVNASaver.py", line 49 self.data : List[Datapoint] = [] ^ SyntaxError: invalid syntax What might the issue be?
Rune Broberg All Messages By This Member #1536 I've developed it using Python 3.7, and the typing (": List[Datapoint]") in that line is reasonably new syntax. So you may need a newer Python version. I'm not a Python wiz either, so I couldn't tell you exactly which; but mine is 3.7.3 -- Rune / 5Q5R toggle quoted message Show quoted text On Fri, 30 Aug 2019 at 19:16, Harry McGavran Jr <w5pny@...> wrote: I'm not a python wiz, but when I try this on Ubuntu 16.04 with either python or python3 I get: File "NanoVNASaver.py", line 49 self.data : List[Datapoint] = [] ^ SyntaxError: invalid syntax What might the issue be?
Harry McGavran Jr All Messages By This Member #1537 I have python2, python3.5, and python3.5m -- I'll see what else I might be able to get for Ubuntu 16.04 ... Thanks
Rudi All Messages By This Member #1540 Hello Rune, Thank you very much for the nanoVNA program. It is a prosmising start. It works also under MacOS Mojave 10.14.6, see the attached screen shot. You just have to edit: self.serialPort = "/dev/cu.usbmodem4001" in program NanoVNASaver.py I use Python version 3.6.3. The only deviation from your screen shot is the data representation. In your screen shot it is a line, in mine there are dots only. 73, Rudi DL5FA nanovna-saver_MacOS.png
Rune Broberg All Messages By This Member #1542 You should be able to put the serial port in the input box, so you don't need to edit the code. But changing the code means it saves it ;-) The dots vs. lines is a matter of how many sweeps you ask it to break the range into - 101 dots per sweep :-) I am however confused about the data I'm seeing at marker 2 - a negative VSWR and quite an odd looking complex impedance. Does it look the same on your NanoVNA's display? -- Rune / 5Q5R toggle quoted message Show quoted text On Fri, 30 Aug 2019 at 19:06, <reuterr@...> wrote: Hello Rune, Thank you very much for the nanoVNA program. It is a prosmising start. It works also under MacOS Mojave 10.14.6, see the attached screen shot. You just have to edit: self.serialPort = "/dev/cu.usbmodem4001" in program NanoVNASaver.py I use Python version 3.6.3. The only deviation from your screen shot is the data representation. In your screen shot it is a line, in mine there are dots only. 73, Rudi DL5FA
Rune Broberg All Messages By This Member #1543 I'm stumped. I've had similar errors before, but I don't know what the right solution is. I hope someone else on the list is able to help. -- Rune / 5Q5R toggle quoted message Show quoted text On Fri, 30 Aug 2019 at 19:07, Harry McGavran Jr <w5pny@...> wrote: Got python3.7 installed -- Now: maui% python3.7 NanoVNASaver.py Traceback (most recent call last): File "NanoVNASaver.py", line 27, in <module> from SweepWorker import SweepWorker File "/usr/local/lib/nanovnasaver/SweepWorker.py", line 22, in <module> import NanoVNASaver File "/usr/local/lib/nanovnasaver/NanoVNASaver.py", line 27, in <module> from SweepWorker import SweepWorker ImportError: cannot import name 'SweepWorker' from 'SweepWorker' (/usr/local/lib/nanovnasaver/SweepWorker.py) Suggestions?
Rudi All Messages By This Member #1544 Hello Rune, Yes, the S11 curve and Smith chart looks the same in the LCD. I have just a 50 cm coax cable RG316 connected to the TX port. Strange. 73, Rudi DL5FA
Harry McGavran Jr All Messages By This Member #1669 I fetched today's version with the reference sweep changes -- now when I import an s1p file Iit only gets used as a reference sweep. I'd like to be able to use markers and the tdr function on touchstone files. That way I can look at previous sweeps I had saved without having to do the sweep again. Can you allow loading of touchstone files as regular sweeps in addition to the reference sweeps????
Harry McGavran Jr All Messages By This Member #1670 It would be really nice to be able to use "m" and "k" in the markers too!
Rune Broberg All Messages By This Member #1671 Thanks for the suggestions! I've pushed an update to the repository implementing those two features. I also want to make the markers measure both sweep and reference data, but the UI is starting to get cluttered, so I want to figure out how to do it in a nice way. -- Rune / 5Q5R toggle quoted message Show quoted text On Mon, 2 Sep 2019 at 18:54, Harry McGavran Jr <w5pny@...> wrote: It would be really nice to be able to use "m" and "k" in the markers too!
Harry McGavran Jr All Messages By This Member #1675 Thanks -- NICE! Although you might to change the title of of the "Reference Sweep" section of the GUI to "Import Touchstone File" or some such, since the touchstone files can now be used as either Referrence or Current sweeps.

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Early app for the NanoVNA