Hi
Both addresses give message from Norton " Dangerous Webpage"
Sorry
Jos
Op 21-12-2019 om 09:49 schreef neb40gsm via Groups.Io:
toggle quoted message
Show quoted text
nanoVNA Partner v 0.19
- Max and Min points unit of values displayed fixed;
- Main chart size can now be horizontally increased;
- Added Q-Factor on the main chart;
- Added separate Cal Reset button on its calibration procedure menu;
- Minor grid in all of its charts are enabled;
- And added Recall ID display to be able to monitor what calibration memory is being used.
If interested, download it from here:
nanoVNA Partner v 0.19
- Max and Min points unit of values displayed fixed;
- Main chart size can now be horizontally increased;
- Added Q-Factor on the main chart;
- Added separate Cal Reset button on its calibration procedure menu;
- Minor grid in all of its charts are enabled;
- And added Recall ID display to be able to monitor what calibration memory is being used.
If interested, download it from here:
Kind regards,
neb
Kind regards,
neb
|
Yeah, the original Nano (and mini/pocket VNA, plus most old HP gear) are like that. It's possible to remove the drift (and I mean not having to re-calibrate after warmup) with an internal correction switch (basically a switch that shorts port 1 to ground) which I've added in my design; hopefully others will follow.
|
The difference is, that after warmup one gets repeatable results. When I calibrated the cold VNA and started to measure, maybe the very first results showed true numbers, but very soon results drifted (see the figure to my initial posting). I feel much better when repeated measurement show the same number. Otherwise there is always a bad taste...
Chris
|
nanoVNA Partner v 0.19
- Max and Min points unit of values displayed fixed;
- Main chart size can now be horizontally increased;
- Added Q-Factor on the main chart;
- Added separate Cal Reset button on its calibration procedure menu;
- Minor grid in all of its charts are enabled;
- And added Recall ID display to be able to monitor what calibration memory is being used.
If interested, download it from here:
Kind regards,
neb
|
Look in the source code of nanoVNA-saver on github Or if you only require perfect calibration standards use this: plusJ=complex(0,1); minJ=complex(0,-1); one=complex(1,0); two=complex(2,0); gm1 = S; #Measured Short gm2 = O; #Measured Open gm3 = L; #Measured Load s21m = T; #Measured Through g1=complex(-1,0) g2=complex(1,0); g3=complex(0,0); denominator = g1.*(g2 .- g3).*gm1; denominator = denominator .+ g2.*g3.*gm2 .- g2.*g3.*gm3 .- (g2.*gm2 .- g3.*gm3).*g1; e00 = - ((g2.*gm3 .- g3.*gm3).*g1.*gm2 .- (g2.*g3.*gm2 .- g2.*g3.*gm3 .- (g3.*gm2 .- g2.*gm3).*g1).*gm1) ./ denominator; e11 = ((g2.-g3).*gm1.-g1.*(gm2.-gm3).+g3.*gm2.-g2.*gm3) ./ denominator; deltaE = - ((g1.*(gm2.-gm3).-g2.*gm2.+g3.*gm3).*gm1.+(g2.*gm3.-g3.*gm3).*gm2) ./ denominator; e10e32 = s21m .* (one - (e11.*e11)); ed = e00; es = e11; et = deltaE; th = e10e32; -- NanoVNA Wiki: /g/nanovna-users/wiki/homeNanoVNA Files: /g/nanovna-users/filesErik, PD0EK
|
Hello
I'm just completing a nice project in Python to Autotune a Magnetic Loop antenna using this great NanoVNA.
So far, so good, but now I would like to include a calibration procedure so as to be applied on imported raw data.
Could someone help me to understand how I get a "calibrated" S11 value for a given frequency for which I have the "measured", "load", "open", and "short" values.
Many thanks in advance!
Daniel
|
In the miniVNA (VNA / J) software there is a thermometer.
The green light only occurs above 45 ¡ã. I missed this information on nanoVNA.
|
Re: First PCB pictures of the V2
|
Re: First PCB pictures of the V2
Please don't keep us in suspense! What are the make and part number for these
buttons?
Dana
|
Re: conecting to a homebrew hf verticle antenna
First item, NVIS:
Near impossible with a vertical. Not going to happen above about 5mhz under
current solar conditions. Suitable antenna would be a dipole for 80/75M low to
the ground. Low in this case is just high enough to keep people from touching it.
I run mine at about 10ft, very good for local contacts out to maybe 500 to
600 miles not DX. A friend uses magnet wire on the top of a wood fence.
Vertical likely for bands higher than about 30M the takeoff angle will be high
and higher because the antenna being too long. For below 30M it should
have a fairly low takeoff angle if fed against a good ground or radials.
For 10M the bulk of radiation is mostly up and through the ionosphere.
If you measure it with a VNA you will see wile excursions in feed point impedance
mostly low. Its a non resonant antenna fr most ham bands. The likely impedance
is the antenna plus the ground loss and with a poor ground expect a fair amount
being loss to ground resistance (varies with quality of ground and radials).
FYI-- RULE 3: any antenna is better than a bucket or wire in the shed.
They all work at least some.
My best contact on 40m was with a dipole at 2" (yes inches) height over 1300
miles and 10W. I forgot it was not up yet and heard the station on the radio
so I called. I give it two inches as they lawn had just been mowed.
-----------------
I do not accept private email due to forum scraping groups.io
|
Re: First PCB pictures of the V2
Gabriel, I think it would be advantageous to at least place the solder pads for an SD TF card slot as I had on my original white Gecko board. Just leave them unpopulated for now and when the firmware has become more mature and has update via SD ability (like the NanoVNA-F), folks can add the slot. See my photos:? Unpopulated TF pads:? /g/nanovna-users/photo/0/0?p=Created,,,20,1,0,0 Added card slot from old cellphone:? /g/nanovna-users/photo/0/43?p=Created,,,20,1,40,0 As for a new name, how about i-VNA or E-VNA or VNA-3G?? Everything these days has the letter 'i' in front of the name.....;-) Regards,Larry
On Friday, December 20, 2019, 11:06:11 a.m. GMT-5, Gabriel Tenma White <owowowowo123@...> wrote:
I replaced the jog switch with 3 edge mount through-hole pushbuttons. Any more suggestions (minor changes) before I submit the design for one more round of prototyping?
I am not the owner of the "nanovna" account on GitHub. To be clear, I'm at OwOComm which is a design contractor and does *not* market and sell NanoVNA devices. We are only responsible for the hardware design work which is why the repositories aren't on the OwOComm or my GitHub. I can answer technical and engineering questions only. Because the design will be open sourced we expect many independent manufacturers to be producing these at some point, and what they name it is beyond my control. In fact, the internal name of this project is "S-A-A" for Simple Antenna Analyzer. In a requirements discussion the customer described it to be an "improved NanoVNA, or V2", and the name has stuck thereafter. Since this is the name that all end users on the internet now recognize, I expect that the manufacturer and distributors will run with this name and there is nothing I can do about it. Sorry.
|
Re: First PCB pictures of the V2
I replaced the jog switch with 3 edge mount through-hole pushbuttons. Any more suggestions (minor changes) before I submit the design for one more round of prototyping?
I am not the owner of the "nanovna" account on GitHub. To be clear, I'm at OwOComm which is a design contractor and does *not* market and sell NanoVNA devices. We are only responsible for the hardware design work which is why the repositories aren't on the OwOComm or my GitHub. I can answer technical and engineering questions only. Because the design will be open sourced we expect many independent manufacturers to be producing these at some point, and what they name it is beyond my control. In fact, the internal name of this project is "S-A-A" for Simple Antenna Analyzer. In a requirements discussion the customer described it to be an "improved NanoVNA, or V2", and the name has stuck thereafter. Since this is the name that all end users on the internet now recognize, I expect that the manufacturer and distributors will run with this name and there is nothing I can do about it. Sorry.
|
Re: First PCB pictures of the V2
No, UltraVNA should be a full two-port, > 6 GHz analyzer, >120 dB S21 (and S12) at least.
I want to build one, if I only had time...
Reinier
Op 20-12-2019 om 16:32 schreef Larry Rothman:
toggle quoted message
Show quoted text
How about the name: UltraVNA ??
On Friday, December 20, 2019, 10:29:28 a.m. GMT-5, Gyula Molnar <gyula.ha3hz@...> wrote:
On Fri, Dec 20, 2019 at 11:40 AM, Gabriel Tenma White wrote:
I've brought this issue to the team. It's going to be NanoVNA-B V2, if you
don't object. I'm only an engineer on the development team (for OwOComm) and
my name comes from a fictitious character who has no relation to this project
;)
I did not intend to speak, but I ask: Your conscience is fine, can you sleep soundly? Doesn't it bother you steal your other intellectual product?
¡°I'm just an engineer on the OwoComm development team.¡±
However, you have expropriated the nanovna name on github too.
However, the original "nanovna" is the copyright that you are asking to change your name.
If until now it was not clear.
Bravo. A successful horse must be ridden. In any way?
Regards, Gyula
|
Re: First PCB pictures of the V2
How about the name: UltraVNA ??
toggle quoted message
Show quoted text
On Friday, December 20, 2019, 10:29:28 a.m. GMT-5, Gyula Molnar <gyula.ha3hz@...> wrote: On Fri, Dec 20, 2019 at 11:40 AM, Gabriel Tenma White wrote:
I've brought this issue to the team. It's going to be NanoVNA-B V2, if you
don't object. I'm only an engineer on the development team (for OwOComm) and
my name comes from a fictitious character who has no relation to this project
;)
I did not intend to speak, but I ask: Your conscience is fine, can you sleep soundly? Doesn't it bother you steal your other intellectual product? ¡°I'm just an engineer on the OwoComm development team.¡± However, you have expropriated the nanovna name on github too. However, the original "nanovna" is the copyright that you are asking to change your name. If until now it was not clear. Bravo. A successful horse must be ridden. In any way? Regards, Gyula
|
Re: First PCB pictures of the V2
On Fri, Dec 20, 2019 at 11:40 AM, Gabriel Tenma White wrote:
I've brought this issue to the team. It's going to be NanoVNA-B V2, if you
don't object. I'm only an engineer on the development team (for OwOComm) and
my name comes from a fictitious character who has no relation to this project
;)
I did not intend to speak, but I ask: Your conscience is fine, can you sleep soundly? Doesn't it bother you steal your other intellectual product? ¡°I'm just an engineer on the OwoComm development team.¡± However, you have expropriated the nanovna name on github too. However, the original "nanovna" is the copyright that you are asking to change your name. If until now it was not clear. Bravo. A successful horse must be ridden. In any way? Regards, Gyula
|
Re: errors of "error" models
ann : next-to-come : a practical introduction to errors of "errors"
|
Re: First PCB pictures of the V2
I'd also like to suggest being able to rotate the screen so that the SMA's and cables are not facing the user.
However having removed the jog wheel and converted my Nano to use small push buttons (see attached) with a positive tactile 'click', I definitely wouldn't recommend fitting a jog wheel in any way, shape or form.
Regards,
Martin - G8JNJ
|
Re: errors of "error" models
@Gary O'Neil, N3GO : 20 December 2019 /g/nanovna-users/message/8429Dear Gary, Thank you, very much indeed, because you noticed this ! Well, in our sow this means : "keep the signal flow diagrams, use them to correctly express the relations between a-s and b-s at joining ports, and forget the -most disorientating- "rules" of them". And we used it in this way for more than 25 years until last January 2019, when we found -with much pleasure, indeed- its full independent justification at: D. M. Kerns and R. W. Beatty, "Basic Theory of Wave guide Junctions and Introductory Microwave Network Analysis" [*], Part 2, Introductory Microwave Network Analysis, 2.18 Signal Flow Graph Applied to the Scattering Equations pp.123-124, International Series of Monographs in Electromagnetic Waves, Editors: A. L. Cullen, V. A. Fock J. R. Wait, Volume 13, Pergamon Press Inc, First Edition, 1967: "(f) Comments on use of signal ?ow graphs This technique offers nothing fundamentally new and, if correctly applied, yields the same results one would obtain by solutions of the scattering equations. It seems to be simpler in some eases to write down the solutions by inspection of diagrams rather than by algebraic manipulations. However, one must he careful not to miss any of the loops, and this is a possible source of difficulty, especially when we are dealing with 3-ports, 4-ports, or more complicated networks. As a graphical aid to intuitive thinking about the analysis of systems, it is no doubt valuable, and is therefore a tool to supplement conventional algebraic analysis." Best regards, gin&pez@arg [*] 16 November 2019 : /g/nanovna-users/message/7092
|
Re: First PCB pictures of the V2
I think that NanoVNA-B is okay.
You should not use V2 in its name. I would like to emphasize this again.
I hope that your team accepts this proposal.
Regards,
|
Re: errors of "error" models
GIN&PEZ;
Thank you for this very nice resource archive.
--
73
Gary, N3GO
|
OwO
Igor - PY3IG
Gyula Molnar
gin&pez@arg
