开云体育

I have been through the Wiki and got some answers, but here are some questions about the output options on the nanoVNA-H4:

1. “Phase is the relative phase difference between source and received signals.” What does this really mean? Is it current to voltage phase, or change in that as influenced by the DUT, or simply phase change of voltage alone, or…?

2. “Polar is same as Smith chart but with complex reactance rather than L or C shown.” Yes, the trace is identical to Smith, but why are the real and imaginary numbers reported nowheres near the R and X reported by Resistance and Reactance outputs?

3. Likewise, Real and Imaginary have no similarity to Resistance and Reactance; shouldn’t they be the same?

4. Everyone says that the VNA reports S11 and S21; I get that these are reflection and transmission, but what are the units (or dimensions)? Is it voltage, or power, or current…?

Thanks!

Andy

I can't write or debug software for units I don't have I'm afraid (I don't have a V2plus4), it's like trying to find faults on a car you don't have or have never seen, you need the car there with you to run tests on.

Anyway, to be honest I've moved on now, am doing other things these days.

Thanks for all the thanks.

Hi,

A great effort, OneOfEleven !
Apologies in advance if this thread isn't the correct place for this question though.

I have a NanoVNA V2Plus4 (build 20101013, v1.2) and cannot successfully run other Apps on any of my laptops (Win-7 old machine & Win-10, new machine), both have Cypress drivers installed. So I was delighted when this version ran (v.1.1208), however ...

The pgm loads OK and most functions (span, number of points etc) can be changed. However the 'Continuous Scan' only runs a single scan. The Nana displays USB mode screen as expected. Selecting Cont Scan a second time causes the Nano to revert to it's normal VNA display and then selecting Cont Scan a third time, updated the v1.1.208 graphs. I can crash/freeze both the Nano and the s/ware v1.1.208 by selecting an invalid value (ie : Number of Points).

Is it finger-trouble or have I missed something obvious ? Appreciate your comments.

Thanks in advance,

Kitski

Very thanks OneOfEleven !!!

Enrique LU8EFF

I

Get Outlook for Android<>
________________________________
From: [email protected] <[email protected]> on behalf of Ray <boxman@...>
Sent: Tuesday, September 7, 2021 9:27:18 AM
To: [email protected] <[email protected]>
Subject: Re: [nanovna-users] nanoVNA developers

Oy. TNX.

From the home of
Prof. Emeritus Raymond (Reuven) Boxman
School of Electrical Engineering
Tel Aviv University
Cell: +972 544 634 217

CEO Clear Wave Ltd.
Scientific Writing Courses:


-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Mike C.
Sent: ??? ? 07 ?????? 2021 05:47
To: [email protected]
Subject: Re: [nanovna-users] nanoVNA developers

Just a heads-up Raymond. Your 2 websites:

CEO Clear Wave Ltd.
Scientific Writing Courses:

are "out to lunch", i.e. 'non-functional', just saying. I do like your "perspective", thanks for your input.
Mike C.
Sand-mountain, Trenton, GA, living on "the brow".




On 9/3/2021 4:57 AM, Ray wrote:

A little perspective:
I bought my nanoVNA V2, and also a spectrum analyzer, on Ali Express, well before I even knew about this user group. I came across it while looking for something else, and it immediately caught my attention. I had used a full feature VNA and spectrum analyzer once (costing about $100,000 and $30,000, respectively, or so I was told), and said to myself: hey, this looks neat and would come in handy for various projects I'm working on. I chose the model and the store on Ali based on getting something that would cover the 2.45 GHz ISM band, at a price less than $70 (to avoid paying customs), and generally at minimum price.

Unfortunately, the hardware arrived with almost 0 documentation. The only thing sent was a menu map, which was more or less useless. I was given a link to website, which had some minimal instructions which could not be carried out for calibrating. Corresponding with the vendor was completely unsatisfactory -- I am sure they have no idea what they are selling. For them if they sell a VNA, a pair of sneakers, or sex toys -- its exactly the same thing -- what is the profit margin. (The 35-4400 MHz Spectrum Analyzer came with even less documentation, and I have not yet managed to get it to work).

I had never heard of OwO, Hugens, or any of the dedicated people who developed firmware or software, or help other people on this group, until I came across this group searching for some kind of manual. All power to all of you! And many thanks!

But everyone should be aware that there is a commercial jungle out there. My suspicion is that many more people buy a nanoVNA because they saw a commercial advertisement, e.g. on Amazon or Ali, rather than from reading this group's discourse. Thus appeals in this group to respect the developers' wishes will probably have little effect. My advice to all developers, of whatever, is to first decide what your motivation is. If it is to profit from your work, which is perfectly legitimate, then you should take all of the legal precautions necessary, e.g. patent protection, secrecy, etc. This can be quite costly - probably a minimum of $10,000 for each country over the lifetime of the patent, if you know enough to file yourself (otherwise twice or thrice this figure). And if you need to defend a patent against infringement, the costs can easily get to the M$ range. Know that Murphy's law applies here - if something can be copied, and if it is worthwhile to copy, then it will be copied.

Or, a developer can decide that his or her motivation is not monetary, but rather helping mankind, helping the profession or the hobby, or even obtaining or strengthening one's reputation in the technical community. Then you might tell all and share all, and feel some satisfaction that others are benefitting from your efforts. In my opinion, any middle ground between these two approaches is apt to be frustrating.

With regards and gratitude,
Ray 4X1RB

From the home of
Prof. Emeritus Raymond (Reuven) Boxman School of Electrical
Engineering Tel Aviv University
Cell: +972 544 634 217

CEO Clear Wave Ltd. Scientific
Writing Courses:


-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of
OwO
Sent: ??? ? 02 ?????? 2021 16:20
To: [email protected]
Subject: Re: [nanovna-users] SAA-2N V2.2 DISPLAY ISSUES

I asked?, not forced, people to not help vendors that are selling copies of my design against my will.

How hard is it to simply STOP producing and selling copies of my design? My request is as simple as it gets. Is it that important to Hugen to make a profit off of my work and screw the original developers over while doing it?

Hi Albert!
Here are some pictures of my test jigs...
Karl

Nano's have very narrow downconversion bandwidth so not too vunerable.

But, do you happen to have a UHF TV ch 33 transmitter nearby.

Works fine !! Thank you so much OneOffEleven.

Jos


Op 8-9-2021 om 18:03 schreef OneOfEleven:

--
Dit e-mailbericht is gecontroleerd op virussen met Avast antivirussoftware.

Thank You OneOfEleven...

Great respect.. Top !!!

JP

v1.1.208 works great ! I love it - it?s the best - thank you OneOfEleven

The wiki page Home has been updated by Larry Rothman <nlroth@...>.

Reason: updated nanovna-app info for release 1.1.208

Compare Revisions

Ooops, I meant v1.1.208

Please read the updated notes in the Wiki for the Nanovna-App application regarding installation.

Thanks - It solved the access violation error problem.
I'll update the forum's Wiki to release 1.1.108

Cheers,Larry

I've fixed the bug - hopefully.

They may not be Teflon.

<>
Virus-free.
www.avast.com
<>
<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

On Wed, Sep 8, 2021 at 11:24 AM va3rr via groups.io <va3rr=
[email protected]> wrote:

Sage advice.

I bought some BNC connectors on Aliexpress to make some calibration loads
for FA-VA5. I've never seen 'teflon' connectors melt so quickly - lol

On Tue, Sep 7, 2021 at 03:52 PM, jmr wrote:

I'd avoid searching for the cheapest ones from the far east via ebay.

There might

not be much advantage in performance but these connectors will be used a

lot

possibly for a few years so I'd recommend getting something with accurate
machining and decent materials so it doesn't cause premature wear in

other SMA

cables or adaptors.

Sage advice.

I bought some BNC connectors on Aliexpress to make some calibration loads for FA-VA5. I've never seen 'teflon' connectors melt so quickly - lol

Marc,

Seems like I am definitely not alone on this. I have tried the DFU process and have had success with tother VNA so I know it works and am familiar with using it. The other methods, Zadic and STM32CubeProgramer I have never tried.

Do you have any reference material on what that process looks like and where that can be found?
If I can wrap my head around that I will give it a try tonight.

Thanks for everyone's help in this
Andy

Hugen,

I will work to get that tonight when I get back.

Thanks,

Thanks, Roger. Very interesting. I have been using your pin socket jig a lot and have obtained good results also.

Albert

Thanks, Manfred.