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Rudi,
thank you very much for your kind comments :-)

--
Rune / 5Q5R

Hi David,
your suggestion of interfacing with the HP 8753 is certainly interesting! I
am going to have the code reworked at some point to accept more VNA types,
so an 8753 option isn't completely impossible. As of now, though, I have no
way I would be able to test it, and that's likely to block any progress
towards it for the foreseeable future. I wouldn't want to be releasing
software that I no way to verify was actually running.

There might be someone local who has one, but barring that, I don't think
I'll work on it for now :-)
--
Rune / 5Q5R

On Fri, 4 Oct 2019 at 15:10, Dr. David Kirkby from Kirkby Microwave Ltd <
drkirkby@...> wrote:

On Fri, 4 Oct 2019 at 13:55, Rune Broberg <mihtjel@...> wrote:

If there are any miscalculations in my software, I do what I can to

correct

them. I have not recently been made aware of any problems, and at no

point

by Owen. I hope that any of you would immediately contact me, should you
find errors in NanoVNA-Saver! :-)

I have not read the article by Owen, but I would agree on this single point
about return loss. But I never commented to you, as it is a subject of much
debate. If there was a very clear majorty for one convention or the other,
I would stay you should go with it, but there's not a clear majority, so
use whatever you want.

If I was to use your software, which I might well do, but m interest is in
portable use, without external software, I would probably recompile and
change the sign. My HP LCR meter allows one to display this R+jX think in
multiple formats. I could give them to you if you wanted, but again, you
know what space you have.

While I am sending you a message, there's something else I thought of that
could be of use to many people, but you might not want to get involved in,
so I did not bother. Your software could be useful to those of us with the
very popular HP 8753 series VNA. It would be good if you could support
reading from them too. The Python code to open a GPIB code and read from it
is about 5 lines long. Much of the other commands you use to set up a
NonVNA would have an equivalent in 8753.

--

Rune / 5Q5R

--
Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD,
Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892

Tel 01621-680100 / +44 1621-680100

On Fri, Oct 4, 2019 at 02:51 PM, @in3elx wrote:

Thanks. It's all very perfect. I already had these files.
But I asked other questions.

I repeat:
Does DfuSe_Demo_V3.0.6_Setup.exe have 30-day work limitations? Yes or no?

NO

DMR-CLEAR_MEMORY_DFU.dfu is the only file I need to clear the memory?

YES

Shouldn't these other files be used ?:
DMR-color-tweak-sept.29.2019_DFU.dfu

NO

DMR_FILL Flash with FF DFU.dfu

Same as DMR-CLEAR_MEMORY_DFU.dfu

DMR_M_10KHz_sept-13-19.dfu

NO

DMR_nano-white-trace-test.dfu

NO

Thank you again.

Really good! Congratulations for your job.
I read it well tomorrow morning.
Thanks

Hi David,
thanks for the list! That's a lot of ways to display the same couple of
numbers ;-) But I'm sure all very useful. I'll keep it around for
future reference :-)

--
Rune

On Fri, 4 Oct 2019 at 17:14, Dr. David Kirkby from Kirkby Microwave Ltd <
drkirkby@...> wrote:

There has been some discussion about the best way to represent data
measured as impedance, into an equivalent circuit. The most comprehensive
of these I have seen, which my company owns, is my obsolte HP 4284A
precision LCR meter.




which is *not* a VNA, but measures the impedance of a device using a 4-wire
Kelvin measurement. This means everything shown here could conceivably be
displayed.

Someone *might* want to implement all or a subset of these. *I'm not
suggesting they are all implemented - I am just listing them for possible
discussion. *I suspect my HP 4285A LCR meter (75 kHz to 30 MHz) does the
same, but I have not checked.

*HP 4284A 1 MHz LCR meter. *
Cp-D - a parallel capacitance Cp, with a dissipation fact D
Cp-Q - a parallel capacitance Cp, with a Q of Q
Cp-G - a parallel capacitance Cp, with a conductance G
Cp-B - a parallel capacitance Cp, with a susceptance B
Cp-Rp - a parallel combination of a capacitance Cp, and resistance Rp
Cs-D - a series capacitance Cs, with dissipation factor Q
Cs-Q - a series capacitance Cs, with a Q of Q
Cs-Rs - a series combination of capacitance Cs and resistance Rs
Lp-D - a parallel inductor, with a dissipation factor D
Lp-Q - a parallel inductor, with a Q of Q
Lp-G - a parallel inductor, with a conductance of G measured in siemens
Lp-Rp - a parallel combination of an inductance Lp and resistance Rp.
Ls-Q - a series inductor Ls, with a Q of Q
Ls-Rs - a series inductor Ls with resistance Rs

*R - X - I don't need to explain what that is. *
Z-theta (degrees) - The magnitude and phase of an impedance expressed in
degrees.
Z-theta (rad) - The magnitude and phase of an impedance expressed in
radians.
G-B - G is the conductance measured in siemens (admittance Y = G + j B)
Y-theta (degrees) the magnitude of the admittance Y, and phase angle
expressed in degrees
Y-theta (rad) the magnitude of the admittance Y, and phase angle expressed
in radians

--
Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD,
Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892

Tel 01621-680100 / +44 1621-680100

I collected some of this information near the top of Firmware Versions


.. which is at the bottom of Wiki Main Menu page
/g/nanovna-users/wiki

Thanks. It's all very perfect. I already had these files.
But I asked other questions.

I repeat:
Does DfuSe_Demo_V3.0.6_Setup.exe have 30-day work limitations? Yes or no?


DMR-CLEAR_MEMORY_DFU.dfu is the only file I need to clear the memory?
Shouldn't these other files be used ?:
DMR-color-tweak-sept.29.2019_DFU.dfu
DMR_FILL Flash with FF DFU.dfu
DMR_M_10KHz_sept-13-19.dfu
DMR_nano-white-trace-test.dfu

Thank you again.

Mike - Don't use anything else!

The NanoVNA was designed to use only a 5V supply, via the USB port.
The internal charge IC is both a 3.7V LiIon charger and 5V inverter combo - there are lots of comments about that chip on the forum.
The 5V output from that inverter MUST be well regulated as it supplies the mixer (612) chips.
If you want? longer run time - get a bigger Lithium battery. Do NOT use anything else or you'll damage stuff.
I used one from a cellphone that was 1100mAH - it WILL charge - but will take longer.

Is there an on-board voltage regulator that converts 5.0V from the USB to whatever is used internally?

If so, what external voltage range could be used in lieu of 5.0V from USB (but through the USB connector) to power the nanoVna?

I'm thinking of 4 rechargeable NiMH cells which would be about 5.2V fully charged, and about 4.4V when they need to be recharged?

WA7ARK

Use Chrome Browser with its built-in language translation capability.
Then -? Go to the NanoVNA group webpage at:??? /g/nanovna-users/topics
Look at WIKI and FILES sections at left side of screen.

Italian translation of user manual is available at:?

@in3elx wrote:
Is there a document that explains the update procedure for those who have never done this?

The answer is on page 19 of 29 of the document named 'NanoVNA User Guide-English-reformat-Oct-2-19.pdf' that you can find here:

/g/nanovna-users/files/NanoVNA%20User%20Guide-English-reformat-Oct-2-19.pdf

/g/nanovna-users/message/3735


And of course see the wiki:

/g/nanovna-users/wiki/home


@in3elx wrote:
I found the progam DfuSe_Demo_V3.0.6_Setup.exe, but it's a demo. Are there any limitations?

Rob, DfuSe_Demo_V3.0.6_Setup.exe is simply the tool provided by ST in order to program their STM chip used inside the NanoVNA.
You find it here:



Please take a look at this document named 'NanoVNA DFU Firmware Upgrade Guide.pdf' that you can find here:

/g/nanovna-users/message/381

Have a fun!

N.V.

FYI

I have started a thread on EEVblog under this subject line. This is serious math wonk territory, so I don't want to clutter an already very busy list with it.

Have Fun!
Reg

Make sure you're measure correct channel. You should see CH1 (not CH0) near blue LOGMAG text with value at the top of screen.

On Fri, Oct 4, 2019 at 06:44 PM, Larry Rothman wrote:

Si prega di utilizzare la sezione WIKI e FILES su questo forum.
( #quoted-73772044 )

Could you be kinder?
I just joined this system (which I don't know).
I don't speak English very well and this is already difficult for me.
If someone can put some links with useful information ... thanks

RL = -20 * log10( abs(gamma) )

where gamma is a complex reflection coefficient

In order to get negative RL, we needs abs(gamma) > 1, it means that reflected wave is higher than incident wave.

Thanks. I did all that, still no S21. I think it's blown up. There is also
an incompatibility between the firmware files I found and the SGMicro
bootloader pgm. It was listed as "new out of box" and the protective screen
plastic has lots of marks on it, though the unit was sealed. Anyone can
seal those plastic envelopes. Now the seller has nothing to sell and does
not respond.

I just went through a calibration and save and it seems to be working correctly this morning.? Time will tell.
I almost ordered another unit.? Apparently the prices have dropped significantly.
Bob

Bob,
If you are using the original firmware that came on your nanoVNA then the symptoms haven't been reported by other members and you may have a hardware problem. If you have upgraded your firmware then there is the possibility that the process did not take correctly and is causing your problems.

Herb

AFAIK, only the dev tree exists - there is no APK app that I can find.
It would be nice if cho45 could convert his webpage to a standalone html file that anyone could run locally.

On Friday, October 4, 2019, 1:40:08 p.m. GMT-4, Oristo <ormpoa@...> wrote:

> You need to be connected to the Internet in order to use the Web interface

because you need to access cho45's webpage.

NanoVNA-Web-Client includes some Android app source.
It is being actively developed, with automated build tools and even unit tests:


Has anyone tried that Android app?

Ken,
The 2-trace, unshielded ports, black unit is usually delivered uncalibrated and is not useable out of the box. The following usually gets it going:

First select "RESET" under the "CAL" menu and then perform the normal calibration procedure and save to location "0".

On a Windows PC you need to select a firmware with the .dfu extension for use with the flash utility when upgrading your device.

Herb