Re: Which firmware version?
Thanks everyone for your help. Even tho' my device is the white one without a battery the firmware updated OK.
Joe
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This Link is, in addition to my proposed PDF (G. Kraus) a more practical oriented HowTo:
hth
Thomas
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If you can find an Android terminal program that can access USB serial
devices, it should be able to use nanoVNA shell commands.
Thank you for the tip. I tried to find a terminal program and tried a few but couldn't get any to connect with the USB as a serial port. It might be my fault because I don't understand Android setup very well (I couldn't find PuTTY for Android.) But my NanoVNA USB connects fine to a PC with PuTTY. I tested the available commands and they communicate, but they don't work as fully as using the menus on the NanoVNA itself. Would upgrading the firmware give more or better commands with a serial terminal? -Pete
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Thank me install nanoVNA Partner v0.19 + draiver st (com virtual) ok work
Roberto
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Re: How to find the right ferrite toroid for a receiving antenna balun?
Keith,
Use the free word to pdf conversion sites online to convert the doc.
Google word to pdf - you'll find that Adobe even has a service for this:
Cheers,
Larry
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On Monday, January 13, 2020, 2:44:31 p.m. GMT-5, Keith <zl2tpq@...> wrote: Hi David, Is there any chance that you could convert the Word document to a PDF which would allow the likes of myself to read it. I don't want to buy a later version of MS Office than the one I use now. Keith ZL2TPQ ------ Original Message ------ From: "David Eckhardt" <davearea51a@...> To: "NANO VNA" < [email protected]> Sent: 14/01/2020 7:06:56 AM Subject: Re: [nanovna-users] How to find the right ferrite toroid for a receiving antenna balun? The attachments may be of some help.? Generally, for HF, 43, 73 or 75
material is used.
Wind your transformer.? Properly calibrate the VNA with SOL over the
frequency range of interest - no through is required as you need only a
one-port cal for the measurement.? Connect one set of windings to the S11
port.? Terminate the other set of windings with a 450-ohm non-inductive
resistor.? Measure the side connected to the Port 0 (the S11 port).? If
this is 'off scale' or hard to read, try a resistor value half that value.
The impedance transformation will be close to the 450-ohm termination read
with the lower value when 450-ohm terminates the transformer, but may be
easier to real.? Things should end up on the right side of the Smith Chart
(the High-Z side).
Dave - W?LEV
On Mon, Jan 13, 2020 at 4:09 PM <ohansmit@...> wrote:
? This one covers various core materials.
? Regards
? Ohan, ZS1SCI
--
*Dave - W?LEV*
*Just Let Darwin Work*
*Just Think*
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Re: How to find the right ferrite toroid for a receiving antenna balun?
Hi David,
Is there any chance that you could convert the Word document to a PDF which would allow the likes of myself to read it.
I don't want to buy a later version of MS Office than the one I use now.
Keith ZL2TPQ
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------ Original Message ------ From: "David Eckhardt" <davearea51a@...> To: "NANO VNA" < [email protected]> Sent: 14/01/2020 7:06:56 AM Subject: Re: [nanovna-users] How to find the right ferrite toroid for a receiving antenna balun? The attachments may be of some help. Generally, for HF, 43, 73 or 75
material is used.
Wind your transformer. Properly calibrate the VNA with SOL over the
frequency range of interest - no through is required as you need only a
one-port cal for the measurement. Connect one set of windings to the S11
port. Terminate the other set of windings with a 450-ohm non-inductive
resistor. Measure the side connected to the Port 0 (the S11 port). If
this is 'off scale' or hard to read, try a resistor value half that value.
The impedance transformation will be close to the 450-ohm termination read
with the lower value when 450-ohm terminates the transformer, but may be
easier to real. Things should end up on the right side of the Smith Chart
(the High-Z side).
Dave - W?LEV
On Mon, Jan 13, 2020 at 4:09 PM <ohansmit@...> wrote:
This one covers various core materials.
Regards
Ohan, ZS1SCI
--
*Dave - W?LEV*
*Just Let Darwin Work*
*Just Think*
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I saw this posted by someone on the nanovna Facebook group and thought it was worth posting here as well....
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Re: NanoVNA-saver 0.2.2. crash
Thank you Kurt - there's definitely something wrong there, yes. I will try
to get a fix done quickly.
--
Rune / 5Q5R
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On Mon, 13 Jan 2020 at 20:13, Kurt Poulsen <kurt@...> wrote: Hi Rune
The crash after a calibration and start of multiple sweep produces attached
debug info.
It is only after the calibration is performed.
Load the calibration kit has no impact it is only when a calibration has
been performedand multiple sweep stated it happens not by single sweep
Kind regards
Kurt
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NanoVNA-saver 0.2.2. crash
Hi Rune
The crash after a calibration and start of multiple sweep produces attached
debug info.
It is only after the calibration is performed.
Load the calibration kit has no impact it is only when a calibration has
been performedand multiple sweep stated it happens not by single sweep
Kind regards
Kurt
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On Mon, Jan 13, 2020 at 10:37 AM, Leif M wrote:
Ok. But which version, last time I checked there were so many version that I couldn't take any.
=================================================
Leif,
One of our members compiled a table listing the different firmware available (see attachment). It should help you to narrow down your choice.
- Herb
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Re: NanoVNA-Saver Linux update procedure
#tutorials
The worst part of this is that pip do create files in the /tmp
directory I have seen it. but when it comes to PyQt5 there is a bug.
Also, when we download the PyQt5-5.14.1 compresed file it does not
contain a setup.py file. Unless it is in the pip process to create it
wich I have no idea. If so, the problem seem to be the source of the
PyQt5-5.14.1
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Le lun. 13 janv. 2020 ¨¤ 12:28, Alberto I2PHD <i2phd@...> a ¨¦crit :
The strange thing is that you get this error running it with sudo. I can
reproduce the same error now running it without sudo, with and without
--no-cache-dir. In both cases it works fine with sudo.
Maybe you have some strange permissions on /tmp ? Debian Buster with KDE was installed just a few days ago, and certainly I did not play with the permissions of /tmp.
And the error message seems to indicate not an access problem, but simply a file not found error...
Tried with and without sudo, but same behavior....
I bet the problem is in some changes of directories structure between different releases of the distribution, a frequent error that plagues Linux ...
Alberto
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Ok. But which version, last time I checked there were so many version that I couldn't take any.
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Re: How to find the right ferrite toroid for a receiving antenna balun?
Much more documentation on ferrites can be found on the Snelling document
Gert
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On 13-1-2020 19:06, David Eckhardt wrote: The attachments may be of some help. Generally, for HF, 43, 73 or 75
material is used.
Wind your transformer. Properly calibrate the VNA with SOL over the
frequency range of interest - no through is required as you need only a
one-port cal for the measurement. Connect one set of windings to the S11
port. Terminate the other set of windings with a 450-ohm non-inductive
resistor. Measure the side connected to the Port 0 (the S11 port). If
this is 'off scale' or hard to read, try a resistor value half that value.
The impedance transformation will be close to the 450-ohm termination read
with the lower value when 450-ohm terminates the transformer, but may be
easier to real. Things should end up on the right side of the Smith Chart
(the High-Z side).
Dave - W?LEV
On Mon, Jan 13, 2020 at 4:09 PM <ohansmit@...> wrote:
This one covers various core materials.
Regards
Ohan, ZS1SCI
--
Independent Expert on CE marking
EMC Consultant
Electrical Safety Consultant
|
I finally received my January/February issue of QEX magazine. Below is a synopsis of the 7 page NanoVNA article by Dr. George Steber.
=============================================================
Dr. Steber starts off by noting that an RF vector network analyzer is the instrument of choice for measuring the electrical parameters of antennas, components, filters and more. For most experimenters the prohibitive high cost of a full-featured analyzer has kept it out of their reach.
He states that in recent years several low cost vector network analyzer designs have appeared on the market with prices that are assessible to experimenters, more specifically the NanoVNA.
Dr. Steber explains how the NanoVNA differs from a typical low cost scalar network analyzer (i.e. NWT4000) by having the capability to measure both magnitude and phase. The unit under review appeared to be hugen's original NanoVNA with shielding and older 50k-900M firmware. It also appears that he only had access to the original NanoVNA-Sharp software application when he wrote the article.
He gives a brief historical overview of the NanoVNA from edy555's original kit to hugen's commercially released version. I'm not sure edy555 would agree with his statement that "after he sold all his kits, he lost interest and discontinued the project". Edy555 has continued to provide firmware and software support for the NanoVNA and has assisted hugen with hardware improvements to the NanoVNA-H.
Dr. Steber also briefly discusses the clones on the market and how to decide if a unit is suitable or not. He references the discussions on this forum by our members. Ultimately his advice was caveat emptor.
Like most of us, he was surprised at the open case design of the NanoVNA but noted that it didn't affect his measurements. He was happy with the calibration standards and cables included with his unit at no additional cost.
He compared the operation of the NanoVNA to the well known DG8SAQ design of T.C. Baier and also said it shares heritage with the EU1KY, antenna analyzer V3. A technical discussion follows about the resistive bridge (works well but limited range), SA612 mixer (Not the best choice but works for the NanoVNA, DG8SAQ and EU1KY), Si5351a generator (square wave output has high harmonic content) and STM32 processor.
The firmware section of the article glosses over the upgrade procedure. It basically just describes shorting the boot pads together. The units that I have purchased recently allow you to enter DFU mode from the menu without needing physical access the boot pins. The NanoVNA-H4 uses the multi-function switch to enter DFU mode.
The operation and uses section had the usual complaint about touchscreen operation using your finger. From experience most of us know that a stylus is the only way to go. The 101 point measurement limitation was the next topic. Again, most of us are already aware that if you have a large frequency span, i.e. 300 MHz, your frequency resolution will be every 2.97 MHz (300/101) and points in-between will be missed. Calibration of the unit and use with NanoVNA-Sharp are glossed over.
Practical measurement examples were presented that compared favorably with the HP8753 VNA within the dynamic range of the NanoVNA. S21 low pass filter, S21 bandpass filter, Measurement bandwidth of the NanoVNA (estimated @ 1 kHz by fft analysis), Testing crystals (101 point resolution dependency. Note: He didn't have access to NanoVNA-saver which over comes the 101 point limitation), Impedance measurement, and VSWR measurement.
Conclusions:
1. Works well.
2. Beware of bad clones.
3. Firmware upgrade procedure may be source of frustration for some.
4. Has limitations but great tool for software/hardware experimenters.
5. Does not come with user manual (note: more resources currently available on the web than at the time of the article).
6. Main limitations are 101 measurement point and 70 dB dynamic range.
7. The NanoVNA is more suitable for advanced radio amateurs who understand its strengths and limitations.
- Herb
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Re: How to find the right ferrite toroid for a receiving antenna balun?
The attachments may be of some help. Generally, for HF, 43, 73 or 75
material is used.
Wind your transformer. Properly calibrate the VNA with SOL over the
frequency range of interest - no through is required as you need only a
one-port cal for the measurement. Connect one set of windings to the S11
port. Terminate the other set of windings with a 450-ohm non-inductive
resistor. Measure the side connected to the Port 0 (the S11 port). If
this is 'off scale' or hard to read, try a resistor value half that value.
The impedance transformation will be close to the 450-ohm termination read
with the lower value when 450-ohm terminates the transformer, but may be
easier to real. Things should end up on the right side of the Smith Chart
(the High-Z side).
Dave - W?LEV
toggle quoted message
Show quoted text
On Mon, Jan 13, 2020 at 4:09 PM <ohansmit@...> wrote:
This one covers various core materials.
Regards
Ohan, ZS1SCI
--
*Dave - W?LEV*
*Just Let Darwin Work*
*Just Think*
|
Re: Which firmware version?
Herb
Then I will look for some firmware -aa without big fonts
thanks !
Enrique lu8eff
El lun., 13 de ene. de 2020 a la(s) 14:46, hwalker (herbwalker2476@...)
±ð²õ³¦°ù¾±²ú¾±¨®:
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On Mon, Jan 13, 2020 at 08:00 AM, Enrique A. Wembagher LU8EFF wrote:
One question... I want to use nanovna as antenna analyser...what is the
stable and appropriate version?
===========================================================
Enrique,
hugen released a firmware version (the -AA firmware) that was
specifically targeted for antenna analyzer use ( thus the -AA suffix). It
has a larger font-size, however; to make room for the larger fonts it only
has 4 save locations. To use it as an antenna analyzer turn off the two
CH1 displays and just use the CH0 port for measuring VSWR, Return loss,
VSWR, TDR, etc. There is another firmware mod that has gigantic fonts that
some members also prefer for antenna analyzer measurements.
- herb
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Re: Which firmware version?
On Mon, Jan 13, 2020 at 08:00 AM, Enrique A. Wembagher LU8EFF wrote:
One question... I want to use nanovna as antenna analyser...what is the stable and appropriate version?
===========================================================
Enrique,
hugen released a firmware version (the -AA firmware) that was specifically targeted for antenna analyzer use ( thus the -AA suffix). It has a larger font-size, however; to make room for the larger fonts it only has 4 save locations. To use it as an antenna analyzer turn off the two CH1 displays and just use the CH0 port for measuring VSWR, Return loss, VSWR, TDR, etc. There is another firmware mod that has gigantic fonts that some members also prefer for antenna analyzer measurements.
- herb
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Re: Nanovna Saver Q issue
Please ignore my post, I don't believe there is a problem with software. It was a cockpit problem here when I manually measured 3db points of the band stop filter I'm working on. Thanks Vince
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Re: NanoVNA-Saver Linux update procedure
#tutorials
The strange thing is that you get this error running it with sudo. I can
reproduce the same error now running it without sudo, with and without
--no-cache-dir. In both cases it works fine with sudo.
Maybe you have some strange permissions on /tmp ? Debian Buster with KDE was installed just a few days ago, and certainly I did not play with the permissions of /tmp. And the error message seems to indicate not an access problem, but simply a file not found error... Tried with and without sudo, but same behavior.... I bet the problem is in some changes of directories structure between different releases of the distribution, a frequent error that plagues Linux ... Alberto
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astromeier
Pete Buxton
Roberto
Roger Need
Kurt Poulsen
Enrique A. Wembagher LU8EFF
Alberto I2PHD