Re: Using an external RF bridge with NanoVNA
Thank you Oristo and KB1GMX for the info, much clearer now.
The picture of the bridge is indeed the original from transverters-store
<>, mine is on the way and will be a green
one, from ebay (60dbmco from Ukraine).
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On Sun, Dec 1, 2019 at 9:10 PM aparent1/kb1gmx <kb1gmx@...> wrote: Its a way to permit using attenuation where you need it
and allow for gain as needed.
I can be used with a different reference such as 75 ohms (any actually)
for systems that are not 50 ohms to make measurements.
An example using that bridge is measuring a radios input impedance
where a very small signal may over load the radio.
If you put a attenuator on port 0 (s11) the return is also attenuated
and the results are hard to discern.
With the bridge you can attenuate the output and see the returned
signal from the radio input using port2 (s21) and if the signal is
weak one can add an amplifier (suitable type) at the input to PORT2.
There are other measurements that may require that as well
for example at higher powers.
The basic instrument is very flexible but the basis of it is a
RF source that has a matching detector that can present
phase and amplitude information.
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I do not accept private email due to forum scraping groups.io
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Re: Nanovna-saver error messages
Hi Mike, those look like transmission errors. Usually a sign that you should upgrade to a newer firmware version which doesn't have those errors. :-) I hope the application works for you other than that! -- Rune / 5Q5R On Mon, 2 Dec 2019 at 13:34, mike watts via Groups.Io <wy6k= [email protected]> wrote: I get these messages when using nanovna-saver. Should I be concerned?
Thanks,
Mike WY6K
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Nanovna-saver error messages
I get these messages when using nanovna-saver. Should I be concerned?
Thanks,
Mike WY6K
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On Mon, Dec 2, 2019 at 02:50 AM, paul larner wrote:
can anyone give me info on this firmware and if its worth
upgrading?:0.2.3-2-g8ac9166
======================================================================= Paul, Gyula Molnar has provided a PDF document describing the different firmware versions currently available. A link to the document is located at: /g/nanovna-users/message/7477 . See what features the firmwares provide and decide if they suit your needs. - Herb
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Gunthard,
thank you very much for your excellent documentation! It's a great honour
to have someone write about my little piece of software, and I hope the
users find it a useful guide!
--
Rune / 5Q5R
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On Mon, 2 Dec 2019 at 10:48, Gunthard Kraus <mail@...> wrote: Hello Friends,
my Name is Gunthard Kraus, DG8GB, and I am a retired Professor of the
Duale Hochschule at Friedrichshafen / Germany.
Even a retired Professor cannot stop thinking and working and so you find
in my Homepage
www.gunthard-kraus.de ( )
a complete tutorial amd getting started Manual with three parts (54 pages,
including 5 practical examples), numbered V1.4.1 for the NanoVNA-saver
Version 0.2.0.
Have fun with it.
73s
Gunthard
Kurt Poulsen < kurt@... > hat am 26. November 2019 um 16:17
geschrieben:
Hi All
I have update my calibration document for male and female calibration.
I have added a set of screen copies how to set the calibrations for
NanoVNA-saver to compensate for the problem Rune made clear recently,
that
a
open C0 of 0 fF was illegal.
So now it works perfectly with the settings described.
The updated document attached and also available from the link
and female calibration NanoVNA-H.pdf
<
Kind regards
Kurt
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Gunthar,
Thanks for your contribution to the community. Glad to see you are staying active and putting your retirement years to good use.
Regards,
- Herb
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Re: Great news from Gunthard Kraus with
Thanks Kurt this is impressive and many thanks to Gunthard Keith g0hkc Get Outlook<> for iOS ________________________________ From: [email protected] < [email protected]> on behalf of Kurt Poulsen <kurt@...> Sent: Monday, December 2, 2019 10:02:10 AM To: [email protected] < [email protected]> Subject: [nanovna-users] Great news from Gunthard Kraus with Hell All Please visit the homepage for Gunthard Kraus and the many good articles he has written in both German and English Language He just added a huge "Getting started manual" for the NanoVNA in German and English The direct links are shown below < Kind regards Kurt
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Re: host software for nanovna, for linux users.
On 30/11/2019 18:09, Rune Broberg wrote: Hi Allison,
just a small correction: Python 2.7 is 9 years old, and at the time of
release was described as "the last major version in the 2.x series". The
author of Python requested that developers move from Python 2 to Python 3
in 2014.
I'll be happy to hear about it if you get the software running under Python
2.7. :-)
FYI Nanovna-saver is also fine under python-3.8 here.
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can anyone give me info on this firmware and if its worth upgrading?:0.2.3-2-g8ac9166
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Hello Friends,
my Name is Gunthard Kraus, DG8GB, and I am a retired Professor of the Duale Hochschule at Friedrichshafen / Germany.
Even a retired Professor cannot stop thinking and working and so you find in my Homepage
www.gunthard-kraus.de ( )
a complete tutorial amd getting started Manual with three parts (54 pages, including 5 practical examples), numbered V1.4.1 for the NanoVNA-saver Version 0.2.0.
Have fun with it.
73s
Gunthard
==================================================
Danke!
David, GM8ARV
--
SatSignal Software - Quality software for you
Web:
Email: david-taylor@...
Twitter: @gm8arv
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bare PCB with a 50ohm through line and sma pcb connector solder pads search messages here using, e.g. sma fixture /g/nanovna-users/message/6681/g/nanovna-users/message/5571To find words that work well, search eBay, e.g.: rf sma pcb sma breakout sma eval bias tee vna demo my favorite (because small, cheap and easily hacked): In theory, searching here by #Hashtag could help, but practically new message topics with questions rarely use them.
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Great news from Gunthard Kraus with
Hell All Please visit the homepage for Gunthard Kraus and the many good articles he has written in both German and English Language He just added a huge "Getting started manual" for the NanoVNA in German and English The direct links are shown below < Kind regards Kurt
|
Hello Friends,
my Name is Gunthard Kraus, DG8GB, and I am a retired Professor of the Duale Hochschule at Friedrichshafen / Germany.
Even a retired Professor cannot stop thinking and working and so you find in my Homepage
www.gunthard-kraus.de ( )
a complete tutorial amd getting started Manual with three parts (54 pages, including 5 practical examples), numbered V1.4.1 for the NanoVNA-saver Version 0.2.0.
Have fun with it.
73s
Gunthard
toggle quoted message
Show quoted text
Kurt Poulsen < kurt@... > hat am 26. November 2019 um 16:17
geschrieben:
Hi All
I have update my calibration document for male and female calibration.
I have added a set of screen copies how to set the calibrations for
NanoVNA-saver to compensate for the problem Rune made clear recently, that
a
open C0 of 0 fF was illegal.
So now it works perfectly with the settings described.
The updated document attached and also available from the link
and female calibration NanoVNA-H.pdf
<
Kind regards
Kurt
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where can I obtain the boards as used by W0QE and others to make various test
boards?. Sorry, I'm not even sure about how to describe them, the bare PCB
with a 50ohm through line and sma pcb connector solder pads.
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Re: Missing driver for ChibiOS/RT Virtual COM port
On Sun, Dec 1, 2019 at 04:59 PM, Roger Need wrote: I am new to this group and did not fully understand the driver reference in
the Wiki when I made my original request for help. Since then I have made
several driver install tests. I also tried downloading the driver from ST at
the Wiki link and it did install correctly in Windows 8.1. It was exactly the
same driver and version number (1.4) that Windows update installed. I checked
to see what Zadig installed and it was a different driver called "libwdi" USB
serial but it worked too. ========================================================================== Roger, Thanks for confirming that the driver located in the Wiki also works. You are not the only new member that has expressed difficulty initially locating the group's Wiki and Files section. In the future I will additionally provide a direct link when referring a member to either of those locations. Once a member is familiar with the Wiki and Files sections they are able to do a lot of self-help on their own. Of course if you still have questions the more experienced users always seem glad to help out. I've found this group to offer mostly substance and very little pomp. Enjoy using your NanoVNA! - Herb
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Re: NanoVNASharp MOD v3 released
Installed and working well I see a dashed magenta line on many of the plots. It is not obvious to me why it is there. Is it possible to move it or remove it from the graph of data?
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Re: Missing driver for ChibiOS/RT Virtual COM port
So installing the STM32 Virtual COM Port Driver from
as suggested by
this group's Wiki page did not work for you? If so then the Wiki needs to be
updated by adding that Zadig is also required to properly install the serial
driver for Windows versions below 10.
- Herb
Herb, I am new to this group and did not fully understand the driver reference in the Wiki when I made my original request for help. Since then I have made several driver install tests. I also tried downloading the driver from ST at the Wiki link and it did install correctly in Windows 8.1. It was exactly the same driver and version number (1.4) that Windows update installed. I checked to see what Zadig installed and it was a different driver called "libwdi" USB serial but it worked too.
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Re: errors of "error" models
#80: [S]-parameters from [Z]-parameters
-
#78'': #78' was re-corrected
20 November 2019 :
Hello,
Allow us, please, to inform you that in the preparation of the
presentation of the measurements of S-parameters of a 2-port
network using the [LeastVNA] only, we had to re-produce
-from the very beginning- the needed mathematical expressions of
S-parameters in terms of Z-parameters, which we just uploaded at:
Sincerely,
gin&pez@arg
:80#
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I should have said, I`m using Win 10 and it is working great with it.
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WY6K Mike Watts
David J Taylor
Oristo
Kurt Poulsen
mike
Roger Need
gin&pez@arg