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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

Guys, you can test this NanoVNA MOD v2:


It has TDR, TDR VSWR, some new calculations and improved live tracking for the graph. Also it don't requires python.

TDR Z is not included yet, since it is more complicated than I thought before

Just rec'd my NanoVna about a month ago. Found this group with great info. This is my first comment. Hope it is taking the correct path into the Group's posts.
To protect the nanoVNA, I am mounting my nano onto a plate. Secured to this plate there will be two type N connectors connected to the nano's SMAs thru short SR coax SMA-SMA jumpers. The type N's were removed and saved from some HP instrument years ago. I am fortunate to have an HP 85032 Type N cal kit.
Pete, WB2UAQ, ex-HP, Agilent

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

I've ordered a pair of SMA male to SMA female adapters to attach permanently directly to the nanoVNA to protect it's connectors. Hopefully they will arrive before the VNA does.

John KK6IL

Mike, thank you very much for your insights. The correct use of a VNA is
all new to me and I welcome any and all advice and suggestions!

Roy
WA0YMH

On Tue, Oct 1, 2019, 7:03 PM mike watts via Groups.Io <wy6k=
[email protected]> wrote:

No No Roy! You need the female to female adapters if you use a coax
jumper to move the calibration plane away from the VNA and to protect the
connector on the VNA from physical stress. Attaching a DUT directly to the
VNA connector puts the VNA connector at some risk. My standard procedure
is to attach a coax jumper - rather than the DUT - to the VNA, otherwise
you wind up with some rather large rigid object sticking out in the air,
just asking for trouble. That is such standard procedure for me that using
it any other way didn't occur to me. That is what I recommend, but I
realize not everyone will always want to use it that way.

Whatever adapter you attach to the calibration standards must have a
female connection on that end since the calibration standard is male. The
other end should also be female if you use a coax jumper (almost all of
which have male connectors on both ends - including the ones included with
the NanoVNA). If you do not intend to use a coax jumper, then the other
side of the adapter should be male. I just didn't think to point out this
possibility in my notes.

I shall attempt to clarify that.

Thanks,
Mike WY6K

Is there a NanoVNA Menu Structure Map for the edy555? I see that OFF/SINGLE/BACK doesn't exist on the edy555 version and CONFIG has appeared. Any others?

No No Roy! You need the female to female adapters if you use a coax jumper to move the calibration plane away from the VNA and to protect the connector on the VNA from physical stress. Attaching a DUT directly to the VNA connector puts the VNA connector at some risk. My standard procedure is to attach a coax jumper - rather than the DUT - to the VNA, otherwise you wind up with some rather large rigid object sticking out in the air, just asking for trouble. That is such standard procedure for me that using it any other way didn't occur to me. That is what I recommend, but I realize not everyone will always want to use it that way.

Whatever adapter you attach to the calibration standards must have a female connection on that end since the calibration standard is male. The other end should also be female if you use a coax jumper (almost all of which have male connectors on both ends - including the ones included with the NanoVNA). If you do not intend to use a coax jumper, then the other side of the adapter should be male. I just didn't think to point out this possibility in my notes.

I shall attempt to clarify that.

Thanks,
Mike WY6K

Hi bammi,
I really meant female to female because I always use a short piece of coax (which has male connectors on both ends - like the ones included with the unit) on the CH0 port.? This is the way I have always used VNAs.? But your comment makes me realize that not everyone will always want to do it that way.? So I should clarify the point.??
The important point is to install an adapter on each calibration standard and never remove it.? The calibration standards are male, so whatever you use must have a male connector to mate with it - let's call that the "outside junction".? That connection should remain fixed forevermore.? The other end of the adapter (let's call that the "inside junction") can be male or female based on whether or not you are going to be using a length of coax between the VNA and the DUT.? Make that "inside junction" female if you plan to attach the calibration standard directly (without any coax inside the calibration plane).? Make the "inside junction" male if you plan to use a coax jumper with male connectors on the ends (which is the most common jumper configuration) to move the calibration plane away from the VNA.? The DUT will, or course, always be attached at the calibration plane.
I'll try to clarify this in my notes.? Maybe a picture or two...
Thanks,Mike WY6K


"... somewhere in the distance, there's a tower and a light, broadcastin' the resistance, through the rain and through the night..."

While determining that ChromeBook browser does NOT support webusb,
I discovered Beagle Term, which can replace e.g. PuTTY for sending nanoVNA commands:


As a Chrome browser app, that means it needs installing only once
if you are a person with multiple PC operating system installations
that all use Chrome browser.

Beagle Term also becomes another method of verifying nanoVNA webusb functionality
without involving Web-Client.

No, I meant female - because I always use a short piece of coax (male on both ends, like the ones provided with the NanoVNA) on the CH0 port.? However, your comment makes me realize that not everyone will always want to do that.? So I should clarify that point.??
Thanks,Mike WY6K


"... somewhere in the distance, there's a tower and a light, broadcastin' the resistance, through the rain and through the night..."