Re: Is there an Android app for the NanoVNA - WebUSB
You might need to run Crouton and install a full copy of Linux. Full details here: On 19 October 2019 at 20:23 hwalker <herbwalker2476@...> wrote:
Oristo,
Did you ever figure out how to get the NanoVNA-Web-Client to connect to your Chromebook? My Samsung Chromebook with either sideloaded apk or web client also will not connect.
- Herb
Nigel A. Gunn, 1865 El Camino Drive, Xenia, OH 45385-1115, USA. tel +1 937 825 5032 Amateur Radio G8IFF W8IFF and GMRS WRBV701, e-mail nigel@... www
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I keep wondering about the wireless mini keyboards that use a USB "dongle"
that looks like a bluetooth dongle, but isn't. Bluetooth has profiles, as does USB, so a bluetooth keyboard advertises as HID, instead of SPP, so would not be recognized as a virtual COM port in Windows. I researched this a little; of the few systems-on-chip with bluetooth, I found none with USB host support, so a small e.g. PARTICLE Xenon or ESP32 board wired to a "Mini USB Host Shield" by spi would be the cheapest DIY "solution" There are BC04-B demo boards, which behave like modems (AT commands and all) but USB is not host.
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Re: Authorized Distributor with 6mo Warranty?
I also bought the AURSINC model from Amazon. It has been great. It is
shielded.
I bought a 3D printed case from ebay. I have no complaints about
anything.
Marco
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On Sat, Oct 19, 2019, 7:31 PM Jim Potter <jpotter@...> wrote: I bought the one from AURSINC. The price was $73, but it had the input
shields, and works fine.
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Re: Authorized Distributor with 6mo Warranty?
I bought the one from AURSINC. The price was $73, but it had the input shields, and works fine.
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Re: Is there an Android app for the NanoVNA - WebUSB
Oristo,
Did you ever figure out how to get the NanoVNA-Web-Client to connect to your Chromebook? My Samsung Chromebook with either sideloaded apk or web client also will not connect.
- Herb
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Re: Authorized Distributor with 6mo Warranty?
today i returned the non shielded one from Amazon
and see that NooElec was mentioned
they dont show any for sale now
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I've just done the MacOS install, went smoothly, all I had to do was adjust
the font size up a bit ;)
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On Sun, 20 Oct 2019, 12:49 W5DXP, <w5dxp@...> wrote: That sure does help, Rune. I was using it on my mobile system and my wifi
doesn't reach that far. It would have never occurred to me that Saver
needed the internet. Thanks very much. Do you have any idea how fast one
has to be to get that screen-capture while Saver is shutting down?
Displaying that screen for longer than one millisecond would help. :)
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Re: Abbreviated documentation for more simplistic tasks?
Jeff, The Smith Chart is tricky to explain, your tutorial does a much better job than most that I have seen. Here's a few adjustments that might be considered, especially if the intended audience changes: Maybe hammer home the impedance side of the chart before introducing admittance. As your tutorial notes, there is a one-to-one relationship between a point in the plot of the load impedance and a plot point in the plot of the reflection coefficient. It might help to compare a plot of load impedance with a plot of reflection coefficient for the same data set, and explain how the latter is the more useful representation. I'd say it's more useful because it is bounded to a magnitude of 1.0 for passive devices, with points of primary interest at high resolution near the center of the chart. And that the rather wild curves you get from plotting raw impedance become well behaved circles when plotting the reflection coefficient. Point out that at a given frequency, the Smith Chart plot is generally just a single point. Since the impedance of inductors and capacitors changes with frequency, a plot for a range of frequencies becomes an oddly shaped track across the Smith Chart, approaching the center of the chart when the impedance of the load approaches the characteristic impedance of 50 ohms. Probably wise to keep the characteristic impedance at 50 ohms. But could include a brief mention that most Smith Charts will have the characteristic impedance normalized to 1.0 ohms. Here's a couple interesting addendums to statements made in the tutorial: Here are plots of ¦£ in the complex-plane with R held constant (circles) and with X held constant (not circles): Plots of constant X are arcs of circles. If the magnitude of the reflection coefficient ¦£ is allowed to exceed 1.0 (as might happen in the case of an amplifier), these arcs can become complete circles. Note: some authors use ¦Ñ in lieu of ¦£ to represent the Reflection Coefficient.
I believe this is a mistake.
I prefer to represent the Reflection Coefficient with ¦£ and its magnitude with ¦Ñ). Page 3-1 of Walter Maxwell's book "Reflections III" has the following passages, first published in 1973: " In combination, the magnitude ratio ¦Ñ and phase ¦È comprise the complex reflection coefficient ¦Ñ" (where that final ¦Ñ is shown with an overbar to indicate it is complex) "Prior to the 1950s, ¦Ñ (rho), ¦Ò (sigma), and sometimes S were used to represent standing-wave ratio. The symbol of choice to represent reflection coefficient during that era was ¦£ (upper case gamma). However, in 1953 the American Standards Association (now the NTIA) announced in its publication ASA Y10.9- 1953 that ¦Ñ was to replace ¦£ as the standard symbol for reflection coefficient, with SWR to represent standing-wave ratio (for either voltage or current), and VSWR specifically for voltage standingwave ratio. Most of academia responded to the change, but some individuals did not. Consequently, ¦£ is occasionally seen representing reflection coefficient, but rarely." From this, we can infer that the preferred manner of representing the reflection coefficient has changed back and forth over the years. It seems ¦£ is now back in fashion for the complex value, and ¦Ñ is now used only for the magnitude of the reflection coefficient. Reflections III consists in part of a series of QST articles written in the 1970's, it's not organized as a cohesive book, and is not an easy read for the neophyte. Some points remain a bit controversial, but my impression is that Walt had it right. He knew his stuff. Once you get the mechanics of impedance matching and using a Smith Chart down, this book is well worth browsing if you wish to figure out exactly what goes on in a conjugate match. All that said, you have created an excellent tutorial. Wish I had access to something like that when first figuring out the Smith Chart. Jerry On Sat, Oct 19, 2019 at 07:40 AM, Jeff Anderson wrote:
Dick, some years ago I wrote up some notes on the Smith Chart (basically
describing where those funny curves come from). It might not be what you are
looking for, but if interested, go here:
- Jeff, k6jca
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That sure does help, Rune. I was using it on my mobile system and my wifi doesn't reach that far. It would have never occurred to me that Saver needed the internet. Thanks very much. Do you have any idea how fast one has to be to get that screen-capture while Saver is shutting down? Displaying that screen for longer than one millisecond would help. :)
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Hello
Ok, great let me try those tips¡ otherwise it looks real good
Thank you!
73 Dana VE3DS
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On Oct 19, 2019, at 19:23, Rune Broberg <mihtjel@...> wrote: Hello Dana, I know that there are a number of users of NanoVNA-Saver on Mac OS X, so it should run "fine". I don't know if the serial port detection works, but if you enter the serial port in the field next to the "rescan" button and click connect, it should connect just fine. If not, try launching the application with the "-d" command to get debugging info, and look at the console for what the application is doing or failing to do. Feel free to send me the where it hangs if it turns out that's what's happening - I might be able to fix it for the next release. :-) Good luck, -- Rune / 5Q5R On Sun, 20 Oct 2019 at 01:19, Dana Shtun <ve3dss@...> wrote: Has anyone compiled this to run on macOS? I did on Catalina, but
it isn¡¯t finding the VNA on the USB port so I suspect there is something
wrong with serial.py?
Would appreciate any help or direction on this.
Thanks
Dana VE3DS
Toronto
On Oct 19, 2019, at 17:31, Rune Broberg <mihtjel@...> wrote:
W5DXP,
thank you very much! If you have update checks enabled, the application
will crash if there is no internet connection. Whoops! :-) I'll fix that in
the next version, and your screenshot has already helped me find the error
I need to handle - but for now, you can disable checking for updates -
either when the application starts and asks you, or by editing the
NanoVNASaver.ini file, and changing "CheckForUpdates=Yes" to
"CheckForUpdates=No". Not that I would recommend disabling updates, but if
the PC doesn't have a permanent internet connection, it wouldn't find
anything anyway. ;-)
I hope this helps, otherwise, do reach out to me again!
--
Rune / 5Q5R
On Sat, 19 Oct 2019 at 23:25, W5DXP <w5dxp@...> wrote:
Rune, I have no problem running Saver 0.1.3 on my desktop. But tried
running it on my laptop today and got the following message which caused
Saver to abort.
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Hello Dana,
I know that there are a number of users of NanoVNA-Saver on Mac OS X, so it
should run "fine". I don't know if the serial port detection works, but if
you enter the serial port in the field next to the "rescan" button and
click connect, it should connect just fine.
If not, try launching the application with the "-d" command to get
debugging info, and look at the console for what the application is doing
or failing to do. Feel free to send me the where it hangs if it turns out
that's what's happening - I might be able to fix it for the next release.
:-)
Good luck,
--
Rune / 5Q5R
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On Sun, 20 Oct 2019 at 01:19, Dana Shtun <ve3dss@...> wrote: Has anyone compiled this to run on macOS? I did on Catalina, but
it isn¡¯t finding the VNA on the USB port so I suspect there is something
wrong with serial.py?
Would appreciate any help or direction on this.
Thanks
Dana VE3DS
Toronto
On Oct 19, 2019, at 17:31, Rune Broberg <mihtjel@...> wrote:
W5DXP,
thank you very much! If you have update checks enabled, the application
will crash if there is no internet connection. Whoops! :-) I'll fix that in
the next version, and your screenshot has already helped me find the error
I need to handle - but for now, you can disable checking for updates -
either when the application starts and asks you, or by editing the
NanoVNASaver.ini file, and changing "CheckForUpdates=Yes" to
"CheckForUpdates=No". Not that I would recommend disabling updates, but if
the PC doesn't have a permanent internet connection, it wouldn't find
anything anyway. ;-)
I hope this helps, otherwise, do reach out to me again!
--
Rune / 5Q5R
On Sat, 19 Oct 2019 at 23:25, W5DXP <w5dxp@...> wrote:
Rune, I have no problem running Saver 0.1.3 on my desktop. But tried
running it on my laptop today and got the following message which caused
Saver to abort.
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Has anyone compiled this to run on macOS? I did on Catalina, but
it isn¡¯t finding the VNA on the USB port so I suspect there is something wrong with serial.py?
Would appreciate any help or direction on this.
Thanks
Dana VE3DS
Toronto
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On Oct 19, 2019, at 17:31, Rune Broberg <mihtjel@...> wrote: W5DXP, thank you very much! If you have update checks enabled, the application will crash if there is no internet connection. Whoops! :-) I'll fix that in the next version, and your screenshot has already helped me find the error I need to handle - but for now, you can disable checking for updates - either when the application starts and asks you, or by editing the NanoVNASaver.ini file, and changing "CheckForUpdates=Yes" to "CheckForUpdates=No". Not that I would recommend disabling updates, but if the PC doesn't have a permanent internet connection, it wouldn't find anything anyway. ;-) I hope this helps, otherwise, do reach out to me again! -- Rune / 5Q5R On Sat, 19 Oct 2019 at 23:25, W5DXP <w5dxp@...> wrote: Rune, I have no problem running Saver 0.1.3 on my desktop. But tried
running it on my laptop today and got the following message which caused
Saver to abort.
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I would really like to connect my new NanoVNA to my laptop using a wireless connection. It doesn't seem likely that a bluetooth adapter would work at the VNA end, though. I keep wondering about the wireless mini keyboards that use a USB "dongle" that looks like a bluetooth dongle, but isn't. This would have to be two little devices with USB connectors that talk to each other "automatically" and not need any manual intervention like a mouse click to make the connection. Sort of a non-discriminatory bluetooth that would always accept the first connection attempt.
Does anyone on here know of such a device or system? I've been trying with google but I can't seem to come up with the right search terms. And maybe there is some reason why the NanoVNA wouldn't support such a connection anyway. Maybe one of the firmware developers could find a way to add a wireless connection feature to the system. Giving it a fixed, non-routable IP address to use a USB wifi adapter might be a good way.
Thanks for any help or suggestions!
Doug, K8RFT
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Re: errors of "error" models
#59 : UPDATE : [LeastVNA] : version 20191020 Hello, Allow us, please, to inform you that we just uploaded the new version of [LeastVNA]: Instructions: 1. Create a [Shortcut to bbcwdem6.exe] 2. Select a working folder wf, e.g. wf = [K:\LeastVNA20191020] 3. Copy [Shortcut to bbcwdem6.exe] and Paste it into wf 4. Unzip [GLeastVNA20191020.7z] into wf 5. Run [Shortcut to bbcwdem6.exe] to open BBCW IDE 5. Open [GLeastVNA20191020.bbc] within BBCW IDE 6. Put your wf at line : 320 *CHDIR "K:\LeastVNA20191020" 5. Run [GLeastVNA20191020.bbc] 6. Check the created [G-LeastVNA.txt] against the included [Check-G-LeastVNA.txt] 7. If they are identical then you are ready to work with [GLeastVNA20191020.bbc] 8. Build your [f.txt], [s.txt], [l.txt], [o.txt], g.txt] with Putty output from your [NanoVNA] and run [GLeastVNA20191020.bbc] to produce your [G-LeastVNA.txt]: #58 : [LeastVNA] ~ [NanoVNA] : Full Final Report 1 : Data and Plots 19 October 2019 /g/nanovna-users/message/5184Sincerely, gin&pez@arg 59#
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How to connect to NanoVNA Depending on application, e.g. if one-port DUT with nominal 450 Ohm impedance, then SMA cable between balun and CH0, then SOL cal using 450 ohm resistor for L and wire for S at screw terminals. If two-port DUT, then 2 baluns needed for THRU "cal"
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Re: Abbreviated documentation for more simplistic tasks?
Hi Rune - I think you misunderstood my intention in posting that link - it's merely a
good guide which could serve as an inspiration. It seems good and fairly extensive, but I have not considered helping describe more PC VNA software than my own and TAPR, which guide was already written and needs only updating. It's not my suggested guide
for non-japanese speakers at least - I think the learning curve is a little
steep if you have to learn a new language first ;-) Translation in Chrome browser seems to work well enough, IMO. If you suggest some guide in another language, then it goes in the Wiki
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How to connect to NanoVNA plse ? Shematic ?
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Re: Abbreviated documentation for more simplistic tasks?
David Wicox... believe me, I get it lol Andrew Andrew Baer, M.D Founder Hugo Gernsback Legacy Projects Father of Science Fiction Amatuer Radio Advocate W1RNY On Sat, Oct 19, 2019, 05:49 David Wilcox via Groups.Io <Djwilcox01= [email protected]> wrote: I agree....... my NANOvna and my Antuino sit there unused because my old
brain and the fact that my medical education didn¡¯t cover electrical or RF
engineering I am hopelessly lost in using these neat and ¡°simple¡± devices
and life doesn¡¯t have enough days left to live in books learning from
scratch all the stuff that has been in this group since the vna came out.
I should be happy as my YOuKits FG-01 does just what I need to set up an
antenna but these new toys piqued my interest. I want to be part of the
¡°in¡± group but find it is getting more difficult.
Dave K8WPE since 1960
David J. Wilcox K8WPE¡¯s iPad
On Oct 18, 2019, at 1:09 PM, Jerry Gaffke via Groups.Io <jgaffke= [email protected]> wrote:
?An excellent idea.
Someone new to VNA's and what a complex impedance is will be overwhelmed
if told to check the wiki, all the forum posts, and read some Agilent
document.
They just want to measure their antenna's SWR (they think).
Or maybe sweep a filter.
A first document should tell them that without having to first wade through a lot of new material.
We need a single document that tells how to charge it, turn it on,
configure it to show SWR
and complex impedance, and then sweep across a range of frequencies.
How to measure that filter.
How to deal with the user interface, what parts of the menu structure they can ignore,
If ambitious, further sections of this document could give a primer on
what a complex impedance is.
When calibration might be a good idea.
What a reference plane is.
Maybe set up a few example exercises, using a 100 pF cap and a 100 ohm resistor so the parts are likely on hand.
Keep the frequency fairly low so it's easy to reproduce.
Show them how to measure these parts in various configurations, and what results to expect.
Perhaps add a hand wound inductor to the mix.
And what happens when this stuff is put on the end of 25 feet of cheap RG79 coax.
An appendix with links into other documents with a brief description of
what can be found there.
Things like transmission line theory, impedance matching, Smith charts, S parameters.
Jerry, KE7ER
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Re: Abbreviated documentation for more simplistic tasks?
Don't you think that the first time user, of limited technical ability, is
overwhelmed with the complexity of the machine and needs to start with a
solid foundation using Saver? What I think does not matter. (I consider nanoVNA a fairly simple machine; it measures RF signal changes.) Complexity comes from [mis]applications and data abstractions, which are the same for better documented VNAs and antenna analyzers. The instructions now are appalling. Thanks! (but I have input only to some in Wiki) If I can't pick an instrument up and read the user "short form get started"
and use it, it goes into the drawer for later consideration. Open source projects are notorious for problematic documentation. I have yet to analyze nanoVNA still-evolving firmware, much less step thru it with a debugger, so this is like blind folks describing elephants that keep moving. I never used a VNA before this, but read edy555's original website before ordering and am happy to have migrated from an SDR and MFJ noise bridge.
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Re: Abbreviated documentation for more simplistic tasks?
No problem, this is a overall learning experience for us all, I just want
to contribute my side when I can, Cheers,
Mel, K6KBE
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On Sat, Oct 19, 2019 at 2:54 PM Rune Broberg <mihtjel@...> wrote: Mel,
I did not mean for it to replace your proposed guide - I think it's a great
idea to make something like the steps you proposed. My link to particularly
the Japanese guide was merely for inspiration, and the download link was
because it's the best link to put into a guide that might be long-lived :-)
--
Rune / 5Q5R
On Sat, 19 Oct 2019 at 23:43, Mel Farrer, K6KBE <farrermesa@...>
wrote:
Very good Rune,
But, it does not address the guy who just opens the box.......
Mel, K6KBE
On Sat, Oct 19, 2019 at 2:26 PM Rune Broberg <mihtjel@...> wrote:
Hi Oristo and Mel,
Thank you for your efforts in making a new user guide! I think it would be
most welcome.
I have no particular desire for a popularity contest. The latest version,
released Wednesday, has around 1100 downloads of the Windows version at
this point. Plenty to make me happy :-)
There are some decent guides out there that people have kindly written for
NanoVNA-Saver in various versions, if you want some inspiration. JH4VAJ has
written both a guide to the basic application, as well as to the latest
updates: is the "basic" guide.
If you want to link to NanoVNA-Saver, a good address is
- this always
points to the latest release.
--
Rune / 5Q5R
On Sat, 19 Oct 2019 at 23:14, Oristo <ormpoa@...> wrote:
click on "nanovna-saver Perhaps NanoVNA-Saver should be listed more prominently in the Wiki
Software section
and a vote taken to assess its relative popularity.
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Oristo
gin&pez@arg