On 1/28/22 7:43 AM, EV Cables Company LLC wrote: Hello,
I am new to the group, and have not gotten an answer so far.
I recently purchased the nanoVNA and want to measure the dBI
of several different antennas in the 900-930 Mhz range.
Please help this noob to know how to do this.
I have tried reading the guides with no luck.
Thanks
Tom You need to set up a mini antenna range - with a reference antenna at some distance from the antenna under test, ideally in a wide open area or an anechoic chamber. Hook the Antenna under Test (AUT) to the VNA's Ch0 port, connect the reference antenna with coax to the Ch1 port.? Measure S21. Now put an antenna with known gain as the AUT and do the same measurement. AUT gain (dBi) = Measured S21unk - measured S21std + (Gain of standard) In general, you want your reference antenna (the "probe") to be at a distance of 2 * D^2/lambda, where D is the size of your AUT and lambda is the wavelength (33 cm in your case at 900 MHz).? You also want to be in the "far field" of both antennas - so call it at least 10 wavelengths apart (~ 3 meters in your case).? Doable in a back yard or largish room. Bear in mind that there's a lot of practical details you need to worry about - reflections from surfaces and equipment, signals on the outside of your coax (so you need appropriate chokes).
|
measuring quadrature modulator, was: Re: [nanovna-users] Antenna gain
On 1/28/22 7:40 AM, Antonio Carvalho wrote: dear All,
sorry to use this thread, but, anyone in this Group has this quadrature
modulator family (brand) or even a similar?
I am asking because I would like to check a datasheet info and I cannot
measure it properly. Many thanks,
[image: image.png] The NanoVNA doesn't go up to the frequency range of that part. There's two ways to measure performance of an I/Q modulator. One uses a VNA and DC sources, the other uses two RF sources and a spectrum analyzer. You hook it up for a straightforward S21 measurement. And then you put DC voltages on the I and Q input. I've used two lab power supplies for this. Then you measure the gain and phase as a function of the I/Q voltages.? For instance, if you have zero on both inputs, the gain should be very low (-40dB).? Put, say, 1 volt on I, and the gain comes up, and the phase is some number. Now, put 1 volt on Q, and zero on I, and you should get the same gain, but the phase should be changed by 90 degrees. Put -1V on I, 0 on Q, and the phase should be 180 degrees, relative to the (1,0) case. What most people do is a sort of sweep I, holding Q at zero, so you get a "gain vs voltage" curve for I. Then do the same for Q. I've done tests where I stepped I and Q over, say, 16 values of each, forming a square grid of points (using an automated system).? From the 256 measurements, you can calculate the gains, the deviations from ideal, any offsets, etc. The other way they are tested is by putting sine waves on I and/or Q and looking for the mixing products at (Fin +/- Fmod) - that's more of a spectrum analyzer approach.
Em sex., 31 de dez. de 2021 ¨¤s 19:43, Alan Brown via groups.io <va3aqb=
[email protected]> escreveu:
I searched through topics and looking on youtube trying to find how to
measure gain correctly. |Does anyone know were to find information?
|
Hello,
I am new to the group, and have not gotten an answer so far.
I recently purchased the nanoVNA and want to measure the dBI
of several different antennas in the 900-930 Mhz range.
Please help this noob to know how to do this.
I have tried reading the guides with no luck.
Thanks
Tom
|
Sorry if this is a repost, I am new to this.
I recently purchased the nanoVPA to measure the dBi of some antennas in the 900-930Mhz range.
First is this possible, and second how do I do it.
I tried to understand the instructions, and could not find a way to perform the testing.
Thanks for your help
|
dear All, sorry to use this thread, but, anyone in this Group has this quadrature modulator family (brand) or even a similar? I am asking because I would like to check a datasheet info and I cannot measure it properly. Many thanks, [image: image.png] Em sex., 31 de dez. de 2021 ¨¤s 19:43, Alan Brown via groups.io <va3aqb= [email protected]> escreveu:
I searched through topics and looking on youtube trying to find how to
measure gain correctly. |Does anyone know were to find information?
|
Re: Problem with DfuSe Demo!
Zack, each of those shown are for different series processors, you select the processor series you are working with. The Stm32cube MX is for all processors for creating programs. The programmer is Stm32cubeProgrammer.
toggle quoted message
Show quoted text
On 1/27/2022 9:54 PM, Zack Widup wrote: None of you seem to understand my question. Go to this page:
Why are there so many versions of this listed? Why STM32CubeF0,
STM32CubeF1, STM32CubeF2, etc.? What is the difference between them?
Zack
On Thu, Jan 27, 2022 at 8:16 PM Chris Gardner via groups.io <seaman98=
[email protected]> wrote:
Zach, I think what you are looking for is the virtual comm port driver
from STmicro to attach the nano vna. I think the name changed to VCP V15.0.
Please follow the instructions in the beginners guide from the link below.
It is under updating firmware. You download a zip file, then select the
correct version for your (windows) operating system level.
(users guide available in the files section of the nanovna users group)
/g/nanovna-users/files/Absolute%20Beginner%20Guide%20to%20The%20NanoVNA/Absolute_Beginner_Guide_NanoVNA_v1_6.pdf
On Thursday, January 27, 2022, 08:12:59 PM EST, Zack Widup <
w9sz.zack@...> wrote:
Well, does anyone know an exact answer to my exact question? Which of the
twelve versions of STM32CUBE shown on their website works with the NanoVNA?
Zack
On Thu, Jan 27, 2022 at 4:56 PM Chris Gardner via groups.io <seaman98=
[email protected]> wrote:
Greetings, Below is a link too the latest version of One Of Eleven
software. This program will allow your PC to communicate with
the Nano VNA device. In a similar fashion to the VNA-Saver application. In
fact, some folks prefer to use it instead.
As has been stated earlier, this program also has the ability to update
device firmware instead of using DfuSe to
update device firmware.
<
Virus-free.
www.avast.com
<
<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
|
Re: Problem with DfuSe Demo!
look for the stm32cubeProgrammer.
toggle quoted message
Show quoted text
On 1/27/2022 12:17 PM, Zack Widup wrote: I see a dozen different versions of STM32CUBE on their website. Which do we
want for the NanoVNA?
Zack
On Thu, Jan 27, 2022 at 2:11 AM john rader <jara8462@...>
wrote:
Chris, this problem is also caused by the dfuse demo no longer being
supported by st micro and superceded by stm32cube programmer, which can
be downloaded on st micro site. I use stm32cube programmer for all
products from st micro now, very simple and quick to use.
John
1/26/2022 4:23 PM, Chris Gardner via groups.io wrote:
I had a similar problem with my NanoVNA initially, and struggled to figure it out as a driver, or device problem. As it tuned out the USB
Cable which had come with the device was apparently faulty. I selected a
similar cable I had, which I believe had come along with a previous
cellphone. Exchanging the USB cable resolved my connection problem.
On Wednesday, January 26, 2022, 01:41:45 PM EST, Mohammad Alsubhani <alsubhani@...> wrote:
Hi there,
I applied the DfuSe Demo to connect it to the NanoVna and make some
measurements. But, when I connected the NanoVna I had no luck; I mean the
DfuSe does not read the device.
|
Re: Problem with DfuSe Demo!
Thank you! This is what I wanted to know. I downloaded and installed it and
it works just fine.
Zack
toggle quoted message
Show quoted text
On Thu, Jan 27, 2022 at 9:13 PM David Nelson <kc2ipx@...> wrote: different software for different processors you probably want
stm32cubeprog
On Thu, Jan 27, 2022 at 9:54 PM Zack Widup <w9sz.zack@...> wrote:
None of you seem to understand my question. Go to this page:
Why are there so many versions of this listed? Why STM32CubeF0,
STM32CubeF1, STM32CubeF2, etc.? What is the difference between them?
Zack
On Thu, Jan 27, 2022 at 8:16 PM Chris Gardner via groups.io <seaman98=
[email protected]> wrote:
Zach, I think what you are looking for is the virtual comm port driver
from STmicro to attach the nano vna. I think the name changed to VCP V15.0.
Please follow the instructions in the beginners guide from the link below.
It is under updating firmware. You download a zip file, then select the
correct version for your (windows) operating system level.
(users guide available in the files section of the nanovna users group)
/g/nanovna-users/files/Absolute%20Beginner%20Guide%20to%20The%20NanoVNA/Absolute_Beginner_Guide_NanoVNA_v1_6.pdf
On Thursday, January 27, 2022, 08:12:59 PM EST, Zack Widup <
w9sz.zack@...> wrote:
Well, does anyone know an exact answer to my exact question? Which of
the
twelve versions of STM32CUBE shown on their website works with the NanoVNA?
Zack
On Thu, Jan 27, 2022 at 4:56 PM Chris Gardner via groups.io <seaman98=
[email protected]> wrote:
Greetings, Below is a link too the latest version of One Of Eleven
software. This program will allow your PC to communicate with
the Nano VNA device. In a similar fashion to the VNA-Saver
application.
In
fact, some folks prefer to use it instead.
As has been stated earlier, this program also has the ability to
update
device firmware instead of using DfuSe to
update device firmware.
<
Virus-free.
www.avast.com
<
<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
|
Re: errors of "error" models
# 113 : Non-Zero Length Through in Full Two-Port SLOT Calibration
Abstract
The most accurate full two-port calibration of a VNA Vector Network Analyzer requires a Direct or Zero¨CLength Through connection. However, it is not uncommon at all to have one or two cables and a DUT Device Under Test with incompatible connectors, either of different type or of the same type/sex, which enforce then the use of some kind of barrel or adapter. Thus, in this paper, we study these cases of Indirect or Non-Zero Length Through, we estimate the effects of such connections on the measurement uncertainty by using our theory of Differential Error Regions and Intervals DERs/DEIs, and we evaluate our resulting method by applying it in practice to a built two¨Cport network, which was measured against frequency with a SLOT calibrated VNA extended by two lengthy cables.
Measurement Uncertainty in Network Analyzers: Differential Error Analysis of Error Models Part 4: Non-Zero Length Through in Full Two-Port SLOT Calibration
September 2016
- - - - -
Hello.
We just uploaded to ResearchGate the missing Full-Text of 4th Paper in order to also complete there this Series of 6 Papers:
Sincerely,
gin&pez@arg
: #113
|
Re: Problem with DfuSe Demo!
Zach, Please try to understand that the company known as ST Microdevices makes many different chips and circuits used in many different types of devices used to make many different machines. This is the NanoVna users group relating to a specific machine using the STM32 chip. You need toinstall The windows virtual com port driver VCP v 15 from STM to use Df program which in turn can connect to, and allow firmware to be updated in the nanovna
I hope this helps. Those other things shown in the link have little or nothing to do with updating nanovna firmware
toggle quoted message
Show quoted text
On Jan 27, 2022, at 22:18, Jim Shorney <jshorney@...> wrote:
?
Different family numbered chips, as described in the descriptions.
STM32Cube MCU Package for STM32F0 series, STM32Cube MCU Package for STM32F1 series, etc.
73
-Jim
NU0C
On Thu, 27 Jan 2022 20:54:26 -0600
"Zack Widup" <w9sz.zack@...> wrote:
None of you seem to understand my question. Go to this page:
Why are there so many versions of this listed? Why STM32CubeF0,
STM32CubeF1, STM32CubeF2, etc.? What is the difference between them?
Zack
On Thu, Jan 27, 2022 at 8:16 PM Chris Gardner via groups.io <seaman98=
[email protected]> wrote:
Zach, I think what you are looking for is the virtual comm port driver
from STmicro to attach the nano vna. I think the name changed to VCP V15.0.
Please follow the instructions in the beginners guide from the link below.
It is under updating firmware. You download a zip file, then select the
correct version for your (windows) operating system level.
(users guide available in the files section of the nanovna users group)
/g/nanovna-users/files/Absolute%20Beginner%20Guide%20to%20The%20NanoVNA/Absolute_Beginner_Guide_NanoVNA_v1_6.pdf
On Thursday, January 27, 2022, 08:12:59 PM EST, Zack Widup <
w9sz.zack@...> wrote:
Well, does anyone know an exact answer to my exact question? Which of the
twelve versions of STM32CUBE shown on their website works with the NanoVNA?
Zack
On Thu, Jan 27, 2022 at 4:56 PM Chris Gardner via groups.io <seaman98=
[email protected]> wrote:
Greetings, Below is a link too the latest version of One Of Eleven
software. This program will allow your PC to communicate with
the Nano VNA device. In a similar fashion to the VNA-Saver application. In
fact, some folks prefer to use it instead.
As has been stated earlier, this program also has the ability to update
device firmware instead of using DfuSe to
update device firmware.
<
Virus-free.
www.avast.com
<
<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
|
Re: Problem with DfuSe Demo!
Look for the STM32CUBE Programmer here:
<>
Mike N2MS
toggle quoted message
Show quoted text
On 01/27/2022 9:54 PM Zack Widup <w9sz.zack@...> wrote:
None of you seem to understand my question. Go to this page:
Why are there so many versions of this listed? Why STM32CubeF0,
STM32CubeF1, STM32CubeF2, etc.? What is the difference between them?
Zack
|
Re: Problem with DfuSe Demo!
Different family numbered chips, as described in the descriptions. STM32Cube MCU Package for STM32F0 series, STM32Cube MCU Package for STM32F1 series, etc. 73 -Jim NU0C On Thu, 27 Jan 2022 20:54:26 -0600 "Zack Widup" <w9sz.zack@...> wrote: None of you seem to understand my question. Go to this page:
Why are there so many versions of this listed? Why STM32CubeF0,
STM32CubeF1, STM32CubeF2, etc.? What is the difference between them?
Zack
On Thu, Jan 27, 2022 at 8:16 PM Chris Gardner via groups.io <seaman98=
[email protected]> wrote:
Zach, I think what you are looking for is the virtual comm port driver
from STmicro to attach the nano vna. I think the name changed to VCP V15.0.
Please follow the instructions in the beginners guide from the link below.
It is under updating firmware. You download a zip file, then select the
correct version for your (windows) operating system level.
(users guide available in the files section of the nanovna users group)
/g/nanovna-users/files/Absolute%20Beginner%20Guide%20to%20The%20NanoVNA/Absolute_Beginner_Guide_NanoVNA_v1_6.pdf
On Thursday, January 27, 2022, 08:12:59 PM EST, Zack Widup <
w9sz.zack@...> wrote:
Well, does anyone know an exact answer to my exact question? Which of the
twelve versions of STM32CUBE shown on their website works with the NanoVNA?
Zack
On Thu, Jan 27, 2022 at 4:56 PM Chris Gardner via groups.io <seaman98=
[email protected]> wrote:
Greetings, Below is a link too the latest version of One Of Eleven
software. This program will allow your PC to communicate with
the Nano VNA device. In a similar fashion to the VNA-Saver application. In
fact, some folks prefer to use it instead.
As has been stated earlier, this program also has the ability to update
device firmware instead of using DfuSe to
update device firmware.
<
Virus-free.
www.avast.com
<
<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
|
Re: Problem with DfuSe Demo!
different software for different processors you probably want stm32cubeprog
toggle quoted message
Show quoted text
On Thu, Jan 27, 2022 at 9:54 PM Zack Widup <w9sz.zack@...> wrote: None of you seem to understand my question. Go to this page:
Why are there so many versions of this listed? Why STM32CubeF0,
STM32CubeF1, STM32CubeF2, etc.? What is the difference between them?
Zack
On Thu, Jan 27, 2022 at 8:16 PM Chris Gardner via groups.io <seaman98=
[email protected]> wrote:
Zach, I think what you are looking for is the virtual comm port driver
from STmicro to attach the nano vna. I think the name changed to VCP V15.0.
Please follow the instructions in the beginners guide from the link below.
It is under updating firmware. You download a zip file, then select the
correct version for your (windows) operating system level.
(users guide available in the files section of the nanovna users group)
/g/nanovna-users/files/Absolute%20Beginner%20Guide%20to%20The%20NanoVNA/Absolute_Beginner_Guide_NanoVNA_v1_6.pdf
On Thursday, January 27, 2022, 08:12:59 PM EST, Zack Widup <
w9sz.zack@...> wrote:
Well, does anyone know an exact answer to my exact question? Which of
the
twelve versions of STM32CUBE shown on their website works with the NanoVNA?
Zack
On Thu, Jan 27, 2022 at 4:56 PM Chris Gardner via groups.io <seaman98=
[email protected]> wrote:
Greetings, Below is a link too the latest version of One Of Eleven
software. This program will allow your PC to communicate with
the Nano VNA device. In a similar fashion to the VNA-Saver application. In
fact, some folks prefer to use it instead.
As has been stated earlier, this program also has the ability to update
device firmware instead of using DfuSe to
update device firmware.
<
Virus-free.
www.avast.com
<
<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
|
Re: Problem with DfuSe Demo!
None of you seem to understand my question. Go to this page: Why are there so many versions of this listed? Why STM32CubeF0, STM32CubeF1, STM32CubeF2, etc.? What is the difference between them? Zack On Thu, Jan 27, 2022 at 8:16 PM Chris Gardner via groups.io <seaman98= [email protected]> wrote: Zach, I think what you are looking for is the virtual comm port driver
from STmicro to attach the nano vna. I think the name changed to VCP V15.0.
Please follow the instructions in the beginners guide from the link below.
It is under updating firmware. You download a zip file, then select the
correct version for your (windows) operating system level.
(users guide available in the files section of the nanovna users group)
/g/nanovna-users/files/Absolute%20Beginner%20Guide%20to%20The%20NanoVNA/Absolute_Beginner_Guide_NanoVNA_v1_6.pdf
On Thursday, January 27, 2022, 08:12:59 PM EST, Zack Widup <
w9sz.zack@...> wrote:
Well, does anyone know an exact answer to my exact question? Which of the
twelve versions of STM32CUBE shown on their website works with the NanoVNA?
Zack
On Thu, Jan 27, 2022 at 4:56 PM Chris Gardner via groups.io <seaman98=
[email protected]> wrote:
Greetings, Below is a link too the latest version of One Of Eleven
software. This program will allow your PC to communicate with
the Nano VNA device. In a similar fashion to the VNA-Saver application. In
fact, some folks prefer to use it instead.
As has been stated earlier, this program also has the ability to update
device firmware instead of using DfuSe to
update device firmware.
<
Virus-free.
www.avast.com
<
<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
|
Re: Problem with DfuSe Demo!
toggle quoted message
Show quoted text
On Thursday, January 27, 2022, 08:12:59 PM EST, Zack Widup <w9sz.zack@...> wrote: Well, does anyone know an exact answer to my exact question? Which of the twelve versions of STM32CUBE shown on their website works with the NanoVNA? Zack On Thu, Jan 27, 2022 at 4:56 PM Chris Gardner via groups.io <seaman98= [email protected]> wrote: Greetings, Below is a link too the latest version of One Of Eleven
software. This program will allow your PC to communicate with
the Nano VNA device. In a similar fashion to the VNA-Saver application. In
fact, some folks prefer to use it instead.
As has been stated earlier, this program also has the ability to update
device firmware instead of using DfuSe to
? update device firmware.
<> Virus-free. www.avast.com <> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
|
Re: Problem with DfuSe Demo!
Well, does anyone know an exact answer to my exact question? Which of the twelve versions of STM32CUBE shown on their website works with the NanoVNA? Zack On Thu, Jan 27, 2022 at 4:56 PM Chris Gardner via groups.io <seaman98= [email protected]> wrote: Greetings, Below is a link too the latest version of One Of Eleven
software. This program will allow your PC to communicate with
the Nano VNA device. In a similar fashion to the VNA-Saver application. In
fact, some folks prefer to use it instead.
As has been stated earlier, this program also has the ability to update
device firmware instead of using DfuSe to
update device firmware.
<> Virus-free. www.avast.com <> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
|
Re: Problem with DfuSe Demo!
Greetings, Below is a link too the latest version of One Of Eleven software. This program will allow your PC to communicate with
the Nano VNA device. In a similar fashion to the VNA-Saver application. In fact, some folks prefer to use it instead.
As has been stated earlier, this program also has the ability to update device firmware instead of using DfuSe to
update device firmware.
|
Re: Problem with DfuSe Demo!
Hi, Because I just wanted an answer to my question. I've been using DiFuse DEMO, but thought I'd try the STM32CUB. Zack On Thu, Jan 27, 2022 at 12:54 PM Roger Need via groups.io <sailtamarack= [email protected]> wrote: On Thu, Jan 27, 2022 at 09:18 AM, Zack Widup wrote:
I see a dozen different versions of STM32CUBE on their website. Which do
we
want for the NanoVNA?
Why not use the NanoVNA app by OneOfEleven? It has firmware update built
in and is very easy to use. It also has many nice features that are not in
Saver and better graphing capability...
Roger
|
Re: Problem with DfuSe Demo!
On Thu, Jan 27, 2022 at 09:18 AM, Zack Widup wrote:
I see a dozen different versions of STM32CUBE on their website. Which do we
want for the NanoVNA?
Why not use the NanoVNA app by OneOfEleven? It has firmware update built in and is very easy to use. It also has many nice features that are not in Saver and better graphing capability... Roger
|
Re: updating firmware with a Mac
The "$" is the prompt, just type in:
dfu-util -l
and you should be good, assuming that dfu-util is installed on the system.
|
john rader
gin&pez@arg
Jim Shorney
David Nelson
Roger Need