开云体育

That sounds odd. I definitely tested saving of calibration data. Did it
write anything to the console about the save failing? Did you check that it
didn't save as "bnc_4.cal"?

--
Rune / 5Q5R

Hi Rune

thanks very much for the new release and fixing the buttons in the cal window.!

I like the object picker for calibration files, but cannot save or load calibrations.

I did a new cal, saved as bnc_4 to ~/nanovna-saver, but it has not saved the file there. Tried ~/config/NanoVNASaver but it's not there either!

73
Nick

Hello,

This email message is a notification to let you know that a file has been updated in the Files area of the [email protected] group.

File: NanoVNA User Guide-English-reformat-Oct-2-19.pdf

Uploaded By: Larry Rothman

Description:
This is a slightly reformatted and edited version of cho45's excellent (github-based) NanoVNA User Guide. I have made the URL links live as well as added some additional verbiage in order to clarify some content. The document is 29 pages and is formatted for printing. updated Oct-2-2019 -Fixed links

You can access this file at the URL:
/g/nanovna-users/files/NanoVNA%20User%20Guide-English-reformat-Oct-2-19.pdf

Cheers,
The Groups.io Team

Hi Bob
I have done it, as I earlier promissed and will as soon I get the report finalized and the characterization tested against the NanoVNA-Saver
Kind regards
Kurt

-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af GM4CID
Sendt: 2. oktober 2019 14:22
Til: [email protected]
Emne: Re: [nanovna-users] Quick Tips for New Users

David, despite agreeing to differ, might I suggest that it would be useful if someone like yourself with the appropriate calibrated professional equipment could offer to measure the three cal standards supplied with the nanoVNA and make public the results and conclusions I do appreciate that in an ideal world testing of an appropriate sample size would be more meaningful.

Regards Bob

There are a couple of additional selections added besides "config". Under the "display", "transform" has been added with a number of possible selections. Also, under "display/format/more", a number of useful selections have been added: "real", "imag", "resistance", "reactance".

David, despite agreeing to differ, might I suggest that it would be useful if
someone like yourself with the appropriate calibrated professional equipment
could offer to measure the three cal standards supplied with the nanoVNA
and publicise the results and conclusions
I do appreciate that in an ideal world testing of an appropriate sample size
would be more meaningful.

Regards Bob

The suitably modified document is attached.

Updated Wiki link: /g/nanovna-users/wiki/User-Guides

Thanks for the new release Rune. It is great to be able not only to sweep stuff but also compare vs theory/simulation.

Loading Elsie S2P Files

After some experimentation I think I am able to load Elsie S2P files into NanoVNA-Saver in the following way:

In Elsie select Menu | Tabulate | Write | Write S-parameter file | S2P [2-port] | MA [volts/volt] | MHz | Version 1.0 | Continue with SnP operation.

Now load the file in NanoVNA-Saver | Files | ... navigate to the file | Load reference / Load as sweep.

Bo

On Wed, 2 Oct 2019 at 10:09, GM4CID <gm4cid@...> wrote:

Keeping things in perspective it looks to me that we might be getting
confused expecting to use a $50
hobby device with hobby grade calibration standards when a $5000+
instrument and professional cal
standards would be more appropriate for the delay figures being mentioned
to be of any relevance.

I would disagree.

SDR-KITS sell a reasonable SMA female calibration kit for ?67.20



I actually thought they did an even cheaper one, but I can not find it.

Rune has added support for calibration kits in his software.

All of the above will work reasonably well if people add connectors savers
(m-f) on the NanoVNA.

Anyway, let’s agree to differ. ?????

73 Bob GM4CID

Dave G8WRB
--
Dr. David Kirkby,
Kirkby Microwave Ltd,
drkirkby@...

Telephone 01621-680100./ +44 1621 680100

Registered in England & Wales, company number 08914892.
Registered office:
Stokes Hall Lodge, Burnham Rd, Althorne, Chelmsford, Essex, CM3 6DT, United
Kingdom

NanoVNASharp MOD v2 also allows to see TDR, TDR VSWR

Added to Wiki: /g/nanovna-users/wiki

Keeping things in perspective it looks to me that we might be getting confused expecting to use a $50
hobby device with hobby grade calibration standards when a $5000+ instrument and professional cal
standards would be more appropriate for the delay figures being mentioned to be of any relevance.

Not withstanding the above the NanoVNA is an extremly effective tool and the suggested use of
m/f SMA adapters to reduce wear on the board mounted connectors is good engineering practice.


73 Bob GM4CID

I just released 0.1.0, grab it here:


This release primarily includes a number of improvements to the stability
of the software. Users should see fewer crashes after upgrading, and
several parts of the code have been improved to make them easier to
maintain and keep free of errors.

New features include the ability to save calibration standard sets, for
those users who have characterized sets, as well as the ability to save
images of charts with data directly by right clicking.

The save/load functionality for calibration files has been reworked, and
there is now a field for notes, which are saved and loaded along with the
file.

The phase charts now support display limits on the data and frequency span.

Touchstone files from RFSim99 should now be imported correctly, and I am
told there is also a method available to export compatible Touchstone files
from Elsie.

I look forward to hearing the feedback and suggestions from the community!

Particular thanks go to those who tested my alpha versions! I hope this
brief alpha test has helped the quality a little, even though I wasn't able
to address all the comments I received ;-)

--
Rune / 5Q5R

From: W5DXP

Here are two SWR scans of my ZS6BKW antenna, one with the NanoVNA and the other with my $450 AIM-4170D.

Attachments:
VNAvsAIM.png: /g/nanovna-users/attachment/3714/0
=============================

Thanks for that. Looks good!

Discussion point: as VSWR can never be less that one, should the Y axis always start from one, and not from zero?

73,
David GM8ARV
--
SatSignal Software - Quality software for you
Web:
Email: david-taylor@...
Twitter: @gm8arv

From: Oristo
[]
If NanoVNA-F wants Rune's support, then they should AT LEAST provide him one, FREE.
======================

Agreed. That would be a worthwhile investment for them. Meanwhile I will make my best efforts to support Rune so the we have one common software for all nanoVNA variants, and as near to one common firmware as might be possible.

David
--
SatSignal Software - Quality software for you
Web:
Email: david-taylor@...
Twitter: @gm8arv

On Wed, 2 Oct 2019 at 04:52, mike watts via Groups.Io <wy6k=
[email protected]> wrote:

Some readers of my Tips for New Users document pointed out that there was
some ambiguity about the type of SMA adapter that should be installed onto
the calibration standards. It depends upon whether or not you intend to
use coax jumpers to connect the DUT to the VNA. If you use jumpers, the
adapters should be female SMA to female SMA. If you like to attach the DUT
directly to the VNA, then the adapters for the calibration standards should
be female SMA to male SMA.

I have attempted to clear up the issue, and have included some pictures to
illustrate the options.

Thanks,
Mike WY6K

If you add a female-female adapter onto the supplied short you will really
mess up its properties. The short supplied has a *very* small negative
delay. As far as I am aware, that’s not accounted for in the firmware, but
it really is so small to be of little practical significance. If you then
and a female-female adapter onto the short standard, it will introduce a
one-way delay of about 42 os, or two-way delay of around 84 ps. (The exact
amount depends on the adapter.) That will add a significant error, which
can not currently be compensated for in the firmware.

Additionally, you will get more stable results if you don’t use cables. ALL
cables will introduce some amplitude and phase instability as they are
flexed or their temperature changes.

I would suggest that you advise people to put m-f adapters on the NanoVNA.
The delay of such adapters will be a but longer, but the calibration should
remove that.

I really can’t see how your advice is good.

Dave.

--

Dr. David Kirkby,
Kirkby Microwave Ltd,
drkirkby@...

Telephone 01621-680100./ +44 1621 680100

Registered in England & Wales, company number 08914892.
Registered office:
Stokes Hall Lodge, Burnham Rd, Althorne, Chelmsford, Essex, CM3 6DT, United
Kingdom

Some readers of my Tips for New Users document pointed out that there was some ambiguity about the type of SMA adapter that should be installed onto the calibration standards. It depends upon whether or not you intend to use coax jumpers to connect the DUT to the VNA. If you use jumpers, the adapters should be female SMA to female SMA. If you like to attach the DUT directly to the VNA, then the adapters for the calibration standards should be female SMA to male SMA.

I have attempted to clear up the issue, and have included some pictures to illustrate the options. The suitably modified document is attached.

If you see other problems, please let me know.

In addition, some folks pointed out that this had drifted away from the original topic. So it now has its own topic. :-)

Thanks,
Mike WY6K

On Wed, Oct 2, 2019 at 03:33 AM, W5DXP wrote:

I see that OFF/SINGLE/BACK doesn't exist on the edy555

yes, they don't needed. You can juse touch trace several time in order to enable or disable it.
CONFIG allows to perform touch screen calibration and save touch calibration.
I didn't find other changes.

On Wed, Oct 2, 2019 at 04:31 AM, WB2UAQ wrote:

I transfer the s1p file from NanoVNA Sharp to an Excel spread sheet and
convert the gamma mag and phase to R and X

there is no need for manual calculations, you can see R and X graphs for series or parallel equivalent in this NanoVNASharp mod:


NanoVNASharp MOD v2 also allows to see TDR, TDR VSWR with no need to install python.
Also it allows to see unwrapped phase and phase delay.

A method used here might help some readers of this vigorous group.

The default sorting of the incoming messages in an email client is

by date and time. That does not have to be.

For the purposes of picking off threads of interest, simply set the

email client to sort by subject. In that way posts on a topic are all
grouped together.

NanoVNA posts are grouped together and are sorted by thread. Posts

from other groups are grouped together, separately, and sorted by their
threads. There is little interleaving of groups or threads. When
finished clearing the topics of interest from each of the groups, mass
purge the posts with the remaining subject headings and return to date
and time sorted order.

With that technique, all subject headings can still be reviewed;

anything new coming up in the way of a topic that looks interesting can
be read if desired.

John

at radio station VE7AOV

+++++


On 2019-09-30 7:29 a.m., n2msqrp wrote:

Dave,

There are so many messages because the nanaVNA is a technology disrupter, a piece of test equipment at a great price that a ham or hobbyist can use and experiment with.
You have a delete key.
I vote for keeping the messages and ideas coming. As new versions are developed new groups are being formed.

Mike N2MS

On September 29, 2019 at 9:01 PM "Dr. David Kirkby from Kirkby Microwave Ltd" <drkirkby@...> wrote:


I am on about a dozen different groups for various things

There’s more messages from this group than any other - and possibly all the
others combined. ????

--

I wanted the same data (R and X) available so I transfer the s1p file from NanoVNA Sharp to an Excel spread sheet and convert the gamma mag and phase to R and X and whatever else is needed (para equiv or other formats). I am not familiar with any programming language at all and have no idea how to change the FW in the nanoVNA so this is the way I went.
Pete, WB2UAQ