Re: Newbie NanoVNA question regarding calibration
Awesome!! I did not know they were outdated. I did see the NanoVNA App, but only saw the 1.0.69 version in the files section. Are the fw files in a new location?
Thank you!!
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-----Original Message----- From: [email protected] < [email protected]> On Behalf Of Siegfried Jackstien Sent: Monday, August 29, 2022 5:47 PM To: [email protected]Subject: Re: [nanovna-users] Newbie NanoVNA question regarding calibration 1.0.69 for your H4 is outdated as is nano vna app (displord version 210 is most actual) you find it here and new fw?? i add to this mail :-) hth dg9bfc sigi Am 29.08.2022 um 22:18 schrieb tdukes@...: Hello,
Just got my NanoVNA H4, have upgraded the firmware to DiSlord's v1.0.69 and using the NanoVNA App v1.1.208 by OneOfEleven. Reason for doing so was to be able to get more than 101p.
After going thru the calibration, my S11 line starts out up and down (technical term), then goes to a flat line. Is that normal? Shouldn't it be flat all the way across? Attached is a screen shot to help what I'm trying to say, make better sense.
Thanks!!
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Re: Newbie NanoVNA question regarding calibration
Your screenshot shows that you are using calibration in the App and not on the NanoVNA itself.
Did you calibrate in the NanoVNA app? If not then you have to calibrate in the app or change the selection to VNA.
Roger
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Re: Newbie NanoVNA question regarding calibration
1.0.69 for your H4 is outdated
as is nano vna app (displord version 210 is most actual)
you find it here
and new fw?? i add to this mail :-)
hth
dg9bfc sigi
Am 29.08.2022 um 22:18 schrieb tdukes@...:
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Hello,
Just got my NanoVNA H4, have upgraded the firmware to DiSlord's v1.0.69 and using the NanoVNA App v1.1.208 by OneOfEleven. Reason for doing so was to be able to get more than 101p.
After going thru the calibration, my S11 line starts out up and down (technical term), then goes to a flat line. Is that normal? Shouldn't it be flat all the way across? Attached is a screen shot to help what I'm trying to say, make better sense.
Thanks!!
|
Newbie NanoVNA question regarding calibration
Hello,
Just got my NanoVNA H4, have upgraded the firmware to DiSlord's v1.0.69 and using the NanoVNA App v1.1.208 by OneOfEleven. Reason for doing so was to be able to get more than 101p.
After going thru the calibration, my S11 line starts out up and down (technical term), then goes to a flat line. Is that normal? Shouldn't it be flat all the way across? Attached is a screen shot to help what I'm trying to say, make better sense.
Thanks!!
|
A comparable tool to S11.exe is now in my NanoVNA toolbox:
The tools are easy to modify because most of them are written in python.
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Re: Unable to connect to serial port on Linux installation.
The problem with that is that on a lot of Linux distros, devices are created by udev at boot, so this will typically revert on restart of the system. The proper solution is to add the user to the group for the tty devices (not sure on this dist - "dialout" on some . . . it can be found via ls -lia /dev/tty<whatever>), and then the fix will be persistent.
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On August 29, 2022 3:55:25 AM CDT, p.pacaud@... wrote: For me : Ubuntu 22.04 nanovna saver 0.2.2
1)plug nanovna
2)in a term
sudo chmod o+rw /dev/ttyACM0
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
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Re: I think I have killed another NanoVNA :(
Hi Tim,
I tried connecting to the NanoVNA using a USB cable, and it seems to work OK. I can do a scan and get the Smith chart to populate. Both NanoVNA-QT / NanoVNA seems to work fine. I am pretty confident that the issue lies with the ribbon cable, or the connectors of the ribbon to the board / LCD, as the LCD lights up, just doesn't display anything on it.
Had a play with it this morning. I took the case off and reseated all of the panel ribbon cables. I tried putting it into dfu (hold down toggle switch while powering on) and rebooted and still the same. I think I have got it into DFU mode, as a drive appeared on my Linux laptop, but "dfu-util -l" shows nothing. I copied the updated firmware over to the disk and rebooted, I now get a different boot sound when starting.
I have just ordered a v2, but would still like to get this working.
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Re: Unable to connect to serial port on Linux installation.
For me : Ubuntu 22.04 nanovna saver 0.2.2
1)plug nanovna
2)in a term
sudo chmod o+rw /dev/ttyACM0
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In PJ the variations according to the frequency of the values of the six columns of data. 4 faults are clearly identified visually. We note that the fault is generally concomitant on two columns. In fact it is of the OpenR and OpenI type; it is the open measure that is wrong. The problem is that we are behind the filtering of nanovan-saver which tried to solve the problem but that only mitigated it and, suddenly, it is more difficult to detect than if we had access to the raw measurements.
This is the algorithm in naonovna-saver
--
F1AMM (Fran?ois)
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Whether you do the calibration on a single port or on both, there are errors in the .cal file. To put it simply, we will say that these are parasites that generate false measurements. The real cause is unknown to me and it doesn't really matter. Either way, there will be mistakes.
The .cal file can be corrected by hand. I enter this file into Excel and, by arithmetic operations, I can locate errors. In the same column, a value is not independent of the preceding and the following; it is therefore quite easy to detect and locate abnormal values. It is then possible to replace the erratic value by an interpolation of the value before and the value after. So far I have never encountered two consecutive false errors in the same column. It can be assumed that, in this case, the algorithm proposes to carry out a new calibration. By hand, we are not sure to have identified all the faults. It's tedious and unreliable.
It would be necessary to develop an algorithm performing this detection and replacement. With Excel, I make line-to-line comparisons, for example by comparing the difference in value between two lines with a threshold. When a value (in a column) is false on line N, it causes a doubt on lines N-1 and N+1.
The notion of fixed threshold is never satisfactory in a good algorithm; this threshold, if there is a threshold, must be adjusted dynamically. The values ??follow pseudo sinusoidal curves since it is the frequency which varies from line to line; this property must be exploited.
The problem of processing the first and last lines of the file arises.
We perceive that there is, either in the box, or in nanovna-saver, a filtering based, at least in part on an average. Measurement faults are not marred by noise; they are very false (erratic). It follows that taking into account an average value, somewhere, to eliminate measures does not work well.
One of the difficulties is that it is a question of correcting the .cal file which is the result of a processing parameterized by
Number of measurements to average
Number to discard
I don't even see which parameters would be the most effective to facilitate post processing.
73
--
F1AMM (Fran?ois)
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-----Message d'origine----- De la part de alan victor dimanche 28 ao?t 2022 16:27
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Re: I think I have killed another NanoVNA :(
You might see if you can see it via USB, and if you can get it into DFU mode and reload it. Bad software can cause that as well.
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On August 28, 2022 1:34:50 PM CDT, Gordie 2M0IRR <2m0irr@...> wrote: It appears I may have killed my 2nd NanoVNA. Last time, I let the battery voltage drop too low, and in my effort to repair, I managed to snap some of the connectors off.
This time, I had a display show until I plugged the charger in, now the panel lights but no text.
I have left it on charge, and the wee red light is blinking. Pull the plug out, no sign of a blue light. I hear the startup sound and can see the panel light, but nothing on the display.
I will leave it to charge overnight, just in case it is a voltage issue.
Any ideas?
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
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I think I have killed another NanoVNA :(
It appears I may have killed my 2nd NanoVNA. Last time, I let the battery voltage drop too low, and in my effort to repair, I managed to snap some of the connectors off.
This time, I had a display show until I plugged the charger in, now the panel lights but no text.
I have left it on charge, and the wee red light is blinking. Pull the plug out, no sign of a blue light. I hear the startup sound and can see the panel light, but nothing on the display.
I will leave it to charge overnight, just in case it is a voltage issue.
Any ideas?
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A suggestion for this routine.
Ask if the DUT is active or passive?
If the device is passive and S21 is
available then...
Ask shall passivity be enforced?
After enforcement of passivity is checked, see
if the results pass a sanity check.
If the cal is not too bad, this may
shed a clue on where the issue lies.
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t's OK now.
Yes I even had a lot of .s1p files in the directory. So, you gave me the idea to modify one so that there is an |S11| > 1 in
And yes S11.EXE spotted it.
---------------------- ------------------
This program checks Touchstone files
for |S11| > 1. These improper values
may indicate invalid VNA calibration.
File |S11| max # > 1
Test.s1p 1.318561271 1
---------------------- ------------------
In fact S11.EXE seems to test all the *.s1p files present in the directory. It still lacks at least one piece of information produced by
S11.exe -? (for example)
I use many reels I had never encountered such behavior before.
As my files were correct, it came out the very ambiguous message:
---------------------- ------------------
This program checks Touchstone files
for |S11| > 1. These improper values
may indicate invalid VNA calibration.
No files found with |S11| > 1
---------------------- ------------------
This S11.exe does not solve the problems of erratic dots produced by the nanoVNA that nanovna-saver does not filter. We are missing two apps
1/ one, fundamental, which corrects the .cal files to purge/correct them of their aberrant measurements. On this subject no one has proposed a relevant algorithm. Encode, then the application is simpler.
2/ the other which corrects outliers in the .s1p files. It's less serious because you can restart a measurement sequence that will perhaps be faultless.
--
F1AMM (Fran?ois)
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-----Message d'origine----- De la part de Arie Kleingeld PA3A 14:08
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Doe you have any s1p files in the same directory as s11 exe?
how about???? s11.exe testfile.s1p???? as a syntax?
Or just s11.exe?? and the directory contains s1p files, that seems logical.
Arie
Op 28-8-2022 om 13:18 schreef F1AMM:
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OK; I understood what it could be used for. What I didn't understand is how S11.EXE is used (its syntax).
S11 -? returns nothing
S11 /? returns nothing
S11 returns in a window
This program checks Touchstone files
for |S11| > 1. These improper values
may indicate invalid VNA calibration.
No files found with |S11| > 1
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OK; I understood what it could be used for. What I didn't understand is how S11.EXE is used (its syntax).
S11 -? returns nothing
S11 /? returns nothing
S11 returns in a window
This program checks Touchstone files
for |S11| > 1. These improper values
may indicate invalid VNA calibration.
No files found with |S11| > 1
--
F1AMM (Fran?ois)
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Everyone did , because you subcribed
Op zo 28 aug. 2022 07:59 schreef F1AMM <18471@...>:
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Hello
I received this email
The following files and folders have been uploaded to the Files area of the [email protected] group.
* /S11.EXE ( /g/nanovna-users/files/S11.EXE )
*By:* Brian Beezley <k6sti@...>
*Description:*
This Windows program checks Touchstone files for |S11| > 1. These improper
values may indicate invalid VNA calibration.
I downloaded this S11.EXE from the given page. Origin: Group Notification
<noreply@...>
I don't know how we can discuss this application (noreply). I don't even
understand the usage. The following message is displayed:
s11 tmp.s1p
This program checks Touchstone files
for |S11| > 1. These improper values
may indicate invalid VNA calibration.
No files found with |S11| > 1
--
F1AMM (Fran?ois)
|
the usage:
in an S1P file, or part of columns of a S2P file (where S11 is also incorporated),? the reflection coefficient is reported.
By definition the coefficient can never be >1.
There's something wrong if there's a value >1.
Cause can be a faulty VNA or bad calibration.
73
Arie PA3A
Op 28-8-2022 om 07:59 schreef F1AMM:
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Hello
I received this email
The following files and folders have been uploaded to the Files area of the [email protected] group. * /S11.EXE ( /g/nanovna-users/files/S11.EXE )
*By:* Brian Beezley <k6sti@...>
*Description:*
This Windows program checks Touchstone files for |S11| > 1. These improper values may indicate invalid VNA calibration.
I downloaded this S11.EXE from the given page. Origin: Group Notification <noreply@...>
I don't know how we can discuss this application (noreply). I don't even understand the usage. The following message is displayed:
s11 tmp.s1p
This program checks Touchstone files
for |S11| > 1. These improper values
may indicate invalid VNA calibration.
No files found with |S11| > 1
|
On 28/08/2022 05:13, Khalid Ibne Masood Khalid wrote: Hello Roger and Larry,
Thanks everyone for your support and information. I really appreciate your help.
Roger,
Yes, I have LiteVNA64, however, I am looking for higher frequency
range, and this is the only one that can go beyond 7 GHz. Do you know
any other VNA that can go to at least 7 GHz with the nanovna protocol?
Thanks again.
Khalid Khalid, Depending on your requirements, you could look at using a Pluto with Satsagen with the third harmonic option. It's not vector, though. It has its own software. David -- SatSignal Software - Quality software for you Web: Email: david-taylor@... Twitter: @gm8arv
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Hello I received this email The following files and folders have been uploaded to the Files area of the [email protected] group. * /S11.EXE ( /g/nanovna-users/files/S11.EXE ) *By:* Brian Beezley <k6sti@...> *Description:* This Windows program checks Touchstone files for |S11| > 1. These improper values may indicate invalid VNA calibration. I downloaded this S11.EXE from the given page. Origin: Group Notification <noreply@...> I don't know how we can discuss this application (noreply). I don't even understand the usage. The following message is displayed: s11 tmp.s1p This program checks Touchstone files for |S11| > 1. These improper values may indicate invalid VNA calibration. No files found with |S11| > 1 -- F1AMM (Fran?ois)
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Roger Need
Ho-Ro
Arie Kleingeld PA3A
David J Taylor