开云体育

Good day all,

I just joined the group and thanks for being there!! Great product(s) and well done information sets. Thank you all who are involved.

I scanned as much of the group info as I could before sending this along. I did not find any info regarding this type of issue.

First the basics:
Using Windows 10 - Version of NanoSaver 3.8
Device #1 NanoVNA H 2"
Device #2 NanoVNA H4 4” Ver 0.5.0 Build Feb 20, 2020 Kernel 5.1.0

I navigated though the Port connection issues and am now communicating with my New NanoVNA H4 device.
I still have my NanoVNA H device and have connected that with NanoSaver as well w/o issues.

The issue that I’m seeing is this:

- Using the NanoVNA H device - after connecting to NanoSaver and calibrating, the device screen/display stays fully lighted and reflects the settings in NanoSaver ie Start / Stop; SWR / Smith Chart etc.

-Using the NanoVNA H4 device - as soon as I connect, the screen/display dims considerably, and does not reflect the settings in NanoSaver.

Will downloading the latest Version fix this or Is this a known issue? Is there something I’m missing/not doing correctly

Thanks for listening,

Barry - ky0gbz

Thanks, How can I appropriately do it on this board?

[RF Demo Kit For NanoVNA VNA RF Test board Vector Network Test Filter Attenuator ] ebay

There is only 1 load connection. The designers thought of everything except an extra load connection.

Jeff

The through calibration is performed by connecting port 1 to port 2. The
isolation calibration is to be done with a 50 ohm load on both port 1 and
2.
*Clyde K. Spencer*



On Tue, Jan 5, 2021 at 1:54 PM Jeffrey Messikian <c172jeff@...>
wrote:

It says...

23. ISOLATION
Note 15:
Remove the two 50 ohm terminators and connect the two cables together.
This will require the
use of only one F-F SMA adapter.

So...does that mean that to perform the isolation calibration, just
connect the two cables using the thru connector on the board? If so, why
do we even need a separate isolation calibration when we can do a thru
calibration?

Seems redundant

It says...

23. ISOLATION
Note 15:
Remove the two 50 ohm terminators and connect the two cables together. This will require the
use of only one F-F SMA adapter.

So...does that mean that to perform the isolation calibration, just connect the two cables using the thru connector on the board? If so, why do we even need a separate isolation calibration when we can do a thru calibration?

Seems redundant

Have a look here:
/g/nanovna-users/message/896

Leakage between ports AFAIK

RF Demo Kit For NanoVNA VNA RF Test board Vector Network Test Filter Attenuator - The one on ebay with ffl connectors

I have two ffl cables to the nanovna. It seems that these cables cables do not rotate very well/at all. So the connections sometimes become not great to non existent.

I assume the calibration needs great connections. How is it done with the board and these cables. I understand the calibration is to b=ring a test plane to the connectors, but how much is overkill here.

Really, what does the isolation calibration try to measure that the others SOLT do not.
Thanks,
Jeff

OK thank you! The Version screen only said "NanoVNA" at the top, not NanoVNA H or NanoVNA H4 so I was confused as to which version to download.

Try a powered USB hub between the PC and the Nano.

John

Download and read the user guides you can find in the forum's files section - my guide and martin's beginner's guide.
It's all in there. You have an H - do NOT flash the H4, V2 or F firmware as it won't work.
Get the latest 1.0.45 FW from the files area as well.

Hi, I just received my NanoVNA. I am using Martin Svaco's excellent Beginner's guide to get acquainted with its operation.

I want to upgrade my firmware if there is an upgrade available. But I am confused what model to look for and where to get the dfu file. My unit looks like sandwiched circuit boards open to the side. Looks to be 2.8 inches. Is this a clone of the original? When I tap Version it says NanoVNA at the top. , based on edy555 design. Version 0.7.1-2-g5a10105, build time May 8 2020, Kernel 4.0.0

Could someone please help direct me?

Thanks, Michael

Check the USB cable for serviceability, check the serviceability of the USB connector of the device!
Further, everything is more complicated!

I totally agree with Roger, in fact if you use TLDetails it is immediately noticed.
73' Franco

Hi Ian,

It’s time to upload the improved firmware, currently 1.0.45 from the latest DiSlord. NanoVNA-Saver also has a newer version of 0.3.8, and in the meantime, OneOfEleven has also created a very useful program running under Windows. I recommend you to visit my website, where you can find the latest firmware and the software referenced above in pdf format. Click on the highlighted text to see the link where you can download it.
Probably the old firmware and the newer program can't communicate, so you might want to upgrade both.

73, Gyula HA3HZ

--
*** If you are not part of the solution, then you are the problem. ( ) ***

I have NanoVNA V2 Plus4.
After connecting to a PC, its display dims and it turns off. After disconnecting the cable to the PC, the device boots to the default settings.
Are there any ideas how to fix this?

Hi,

An inexperienced User here .. I worked with my nanoVNA for several hours this afternoon practising Calibrations and using it to determine the impedance of Co-ax as per a recent Thread. Flushed with success, I connected it to my Surface Pro 4 and repeated the measurements with nanoVNASaver ... no problems so far.

I then intended to load a couple of Calibrations into nanoVNASaver, but firstly, to re-load a previously saved Calibration. This is where things started to go wrong. After opening the saved Calibration and clicking "Apply" .... nanoVNASaver did not respond. Re-tried a couple of times ...nothing. Turned off PC and nanoVNA, then started from scratch. On clicking "Connect to Device" in nanoVNASaver, some numbers would populate the fields on screen, but then nanoVNASaver automatically closed. On trying again ... same result, nanoVNASaver auto turned off.

So went back to basics with nanoVNA disconnected from PC .... and there appears to be no Traces (yes, they are turned ON).

I can see the normal background, can scroll through Menus, RECALL my saved Calibrations etc ... headings are strange eg CH0 Smith 1.0FS 214748367G.'ohm symbol'. Other Trace headings have same data ... but cannot see any Traces for LogMag, Smith Chart etc..

nanoVNA - H edy555 design Version: 0.4.5-1-gfbbceca
nanoVNASaver Version: 3.6
Surface Pro 4 running latest version of Windows 10

Arh .... err ... help please.

Thanks, Ian

I made a manual for the v2.4. it is in there and most of it relates but there are differences. It is in the files section of the other group here
/g/NanoVNA-V2/files/User%20Manuals,%20How2,%20Examples

The scale sets the vertical units/div and it has default settings, but if your traces don't give you enough resolution or are off the scale you will need to change it.
You must first set the trace as active, then set the scale. The electrical delay ≡ port extension. It is used to compensate for cables permanently attached to the DUT that you can't include when you do a calibration.
Now figuring that value out is a whole 'nother topic. It is specified in nF or pF. The reference is the horizontal line you want to call 0 for that trace. It can be 0-8, 0 = bottom, 8 = top.

OK, thanks Larry -- I had missed that section. And thanks Dave for the link to a better deal on those card holders. Probably the same exact maker.

John, G4DRS:

You can't install NANOVNA SAVER as such. Once you download it, drag the
downloaded file onto the desktop (or wherever you want it). When you
double click on that icon, it will launch NANOVNA SAVER. Gotta admit this
got me the first few times I tried, but then I realized the download *is*
the executable file.

Dave - W?LEV

On Mon, Jan 4, 2021 at 8:35 PM John, G4DRS via groups.io <g4drs=
[email protected]> wrote:

On Mon, Jan 4, 2021 at 06:37 PM, David Eckhardt wrote:

Try reloading SanoSaver. I've had to do that several times.

Dave - W?LEV

On Mon, Jan 4, 2021 at 4:44 PM Larry Rothman <nlroth@...> wrote:

Unfortunately, I'm not a nanosaver expert, so I can't answer.
With that said, if your calibration constants have become corrupt, that
might produce some strange errors. Make sure cal is enabled on the

nano.

On Monday, January 4, 2021, 11:36:22 a.m. EST, John, G4DRS via
groups.io <g4drs@...> wrote:

OK,
Thanks, but why do I get that error message? I have used this setup in

the

past without seeing the errors.


John
G4DRS

--
*Dave - W?LEV*
*Just Let Darwin Work*

Dave,
On that subject, I can't seem to 'install' NanoVNASaver properly. It seems
to try to install it every time I click on the .exe.
Is that normal?

John
G4DRS

--
*Dave - W?LEV*
*Just Let Darwin Work*

I never got a conclusive response to my initial query regarding why I could not measure impedance, resistance and reactance on my CMC-choke, i.e. why it can not be shown on the Nano itself although there are formats for it (see first post in this thread). However I found a post by Owen Duffy were he is using the QRP's "NanoVNA MOD v3" (), so finally I reached for a connection to the PC. Now I have measured my choke (16 turns of RG58 on a FT240 mix 31), and using the format "Series RLC" in the program I get what I wanted: R, X and Z. I even get the same result/curves if I do an S11 measurement as well as an S21 measurement. The Nano is a H4. The result is that the resonance is below 2 MHz and since my main interest is 2-8 MHz it should be at bit higher to get higher resistance in my span, but the choke works very well to choke currents on the outside of the coax as measured with my coaxiacableoutershieldmeasurement device. I will see if I get an even better recipe in K9YC Cookbook.
73/Torbjorn