开云体育

Hi Peter,
thanks for trying at least :-)

If you're running the latest release (if not, you should be ;-), please do
try to use the command line option "-D logfile.txt" This will log all
debugging information to the file name you specify. You can then try
sending the log file to me after a crash/lockup, and I will try to see if I
can figure out what's going wrong.

If you're the curious type, and want to follow along with the debugging,
"-d" outputs log information to the console.

My email is mihtjel@... if you want to send me a log file.

I hope you get it working!
--
Rune / 5Q5R

Try to turn off antivirus protection. Mine have a same problem,
working fine on Windows 10 but hanging when running on windows 7. Turn it
off kapersky antivirus protection then solve the problem.

Regards

Hi

I have a problem to get Saver working together with Win7
The program starts, but as soon I connect the VNA the program top working

Did try on Win7 32, 64 and different pc's, but same result
Swap HD op the pc and run Win10,? it works

Any idea?

Peter

The original one went back as there really was too much wrong with it.

The new one... so much better quality.
Bought in UK from a UK source too


In case anyone asks.

:-) PC sees it and seems to be operatiing fine.

[ 518.613594] usb 2-2.1: new full-speed USB device number 4 using ehci-pci
[ 518.722961] usb 2-2.1: New USB device found, idVendor=0483, idProduct=5740
[ 518.722963] usb 2-2.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 518.722964] usb 2-2.1: Product: ChibiOS/RT Virtual COM Port
[ 518.722965] usb 2-2.1: Manufacturer: STMicroelectronics
[ 518.722966] usb 2-2.1: SerialNumber: 400
[ 519.408580] cdc_acm 2-2.1:1.0: ttyACM0: USB ACM device
[ 519.409436] usbcore: registered new interface driver cdc_acm
[ 519.409437] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
dom@dom-usbboot:~/nanovna-saver$ lsusb
Bus 002 Device 004: ID 0483:5740 STMicroelectronics STM32F407

72

Dom
M1KTA

On Tue, 24 Sep 2019 at 10:22, Kurt Poulsen <kurt@...> wrote:

Hi David

I got permission from R&S to publish their T-Check software
and


But that was in 2012 and now you just in the VNWA software in a custom
trace right click the Expression field and the T-Check formula is filled
in. Enable a trace with linear magnitude (s parameter linear) and with 0.01
per division (1%) and reference 1 followed by a press on the F2 key and the
VNWA performs a full 12Term measurement of T-Check.
Of course the VNWA shall in advance be SOLT calibrated and the T-Adaptor
fitted.
If a s2p file imported with full s11/s22/s21/s12 measurement The VNWA
software is totally unique (and free to use) and I have several times
"banged you on the head" to overcome you HP bias and fixation and get on
board your wonderful VNWA hardware/Software sitting collecting dust on the
shelf.
? ? ?

Kind regards

Kurt

Kurt,
There are a few issues here

1) VNWA software is closed source.
2) VNWA software only runs on Windows
3) Although the VNWA software is free, the last time I looked it was only
licensed for use with the VNWA. I know Tom has never pressed this, and in
fact once Tom made a change that allowed me to read in S-parameters from my
LCR meter, although the VNWA software doesn’t fully support the Touchstone
file format. I would add the same is true of an Agilent PNA-X
????. Sonnet Lite was a free, but closed source application which has
better support for Touchstone files.

As an advocate of open source software, and as someone who has a dislike
for Windows, I would rather an open source solution I can run on a Unix or
Linux system.

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

Michael,

First warning:

Please confine your posts to this forum to technical and other non-personal information. Personal attacks, regardless of how mild, are not allowed. You may, of course, send whatever personal email(s) you wish to other forum members. But I don't want to see them posted publicly.

A second violation gets you put under moderation. A third violation gets you removed from the list.

Thank you.

Regards,
DaveD, one of the forum moderators.

Bruce,
If you wrap the TiIvo in aluminum foil and the interference problem goes away, then you have a shielding problem and the ferrites won't help. If the aluminum foil doesn't help then you are most likely on the right track, and interference is being conducted into the Tivo via the power-line. If that is the case, try wrapping about 5 turns of the power cord on one side of a split ferrite clamp and another five turns on the other side of the clamp before closing it. A dc power filter might also be a solution if you have one handy.

Herb

On Tue, Sep 24, 2019 at 11:45 AM, vbifyz wrote:

I have a suspicion that they are not the right material for the low

frequencies involved (3.5-14 MHz).
For these frequencies, the key is the number of turns. You need a ring (not a
snap-on cylinder), and thread the coax as many times as you can through it. If
your application is QRP or RX only, use thin coax (like RG-174).
A single snap-on only helps on VHF. You need a dozen of them to see a
difference.

73, Mike AF7KR

Mike,
Thanks for the comment - I think you are absolutely right about that for HF. In my case, the ferrite chokes were mainly tried with the wall wart power cord going into a Tivo DVR, and I tried to loop the line a few times around the ferrite. So for nanoVNA measurements I am thinking of sacrificing a dead wall wart to harvest the DC line cord and using that as a test line to try different amounts of looping and different ferrite cores to see if I can tamp down the RF ingress into the Tivo box with the HF frequencies of interest. Going from memory the reboot was triggered even when the TV line coax was disconnected...so the DC power line is the main suspect...unless the chassis itself is picking up the RF.
Bruce KX4AZ

On Tue, 24 Sep 2019 at 20:05, London Calling via Groups.Io <punkbiscuit=
[email protected]> wrote:

On Tue, Sep 24, 2019 at 12:27 PM, Dr. David Kirkby from Kirkby Microwave
Ltd wrote:

The name of my company, it's company number, where it is registered, and
the registered address is required under UK law.

With the greatest of respect, you are not on a professional forum, or any
forum that requires your company details.

I only use one email address, and I have no desire to keep turning on/off
signatures depending on where I am posting.

I have however shorted my signature, so each part of the address is
separated by a comma, rather than a new line.

You, or anybody else for that matter, can easily just create a filter to
block my emails if you wish.

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

GM4CID wrote ...
New forum for the V2 at /g/nanovna-f/topics and more info from official store
--------------------------------------------------------------------------------------------------------------------------------------

Bob,
The links you referenced are for the nanoVNA-F, it is a different beast than the nanoVNA V2. It is FreeRTOS based with an 4.3 inch IPS LCD already being offered for sale as you noted. It does not support the current nanoVNA software base, although I'm sure developers will give it a look see over time. Its firmware also is not as upgradeable as the nanoVNA.

The nanoVNA V2 will be follow the same architecture as the nanoVNA, which means that out of the box it will have access to the software base that has already been developed for the nanoVNA. It hasn't been released for retail sell so we'll have to see in what aspects, if any, it actually improves on it predecessor. I think it may eventually be renamed the nanoVNA-H or nanoVNA-H V2 to distinquish it as Hugen's product.

Herb

New forum for the V2 at /g/nanovna-f/topics and more info from official store

Bob GM4CID

Hi Rune. Many thanks for a fantastic application, and to everyone else who has contributed. I have had hours of fun testing various filters, antennas and so on learning how to use the NanoVNA and the NanoVNA Saver software.
A few comments - apologies if they have already been mentioned and I missed the messages.

First for the TDR function, which works great. It would be nice however if the scale of the TDR chart could be adjusted to focus in on the cable itself, and perhaps spot any discontinuities. For example I have an 18m or so cable attached at the moment, but when the TDR chart is shown the horizontal scale is 0-3447.1m, so the area of interest is just in the first few pixels. It would be more useful if the scale could adjust to say 150% of the measurement, or be manually set by the user. Or maybe I just need educating in how to interpret the chart? Is the NanoVNA capable of detecting discontinuities along a cable such as a poor connection or a kink?

Second is a file picker for the calibrations

Thanks again, the hours of work this must have taken is appreciated.

73, Dave M0WID

Dave K wrote:-

When I briefly showed the NanoVNA at my radio club, several remarked they
could not see the screen as it was too small. I would add, the average aget
of the members in my radio club must be late 60's, with the oldest being in
their 80's, and the youngest in their 50's, so their eyesight is probably
not as good as a youngster.

Reading glasses.
I finally decided this year to bother having some, rather than rely on "DX glasses".
Makes a world of difference.
None of us are getting younger ;-)

73 de Andy

On Tue, Sep 24, 2019 at 12:27 PM, Dr. David Kirkby from Kirkby Microwave Ltd wrote:

The name of my company, it's company number, where it is registered, and
the registered address is required under UK law.

With the greatest of respect, you are not on a professional forum, or any forum that requires your company details.
The forums that you inhabit are typically hobbyist in nature.
As such there is no need to company addresses, adverts or inferred forms of self aggrandisement within your messages.
Sorry, just sayin'.

- Andy -

Well, Dr. David Kirkby from Kirkby Microwave Ltd is using this form as advertising for his business... clearly.

Michael, WT9V

No problem Tom, thanks again for the suggestion :-)

--
Rune / 5Q5R

Hello,

Here are the references - for a few wrongly shaped pdfs you may use,
please, a "secure" removal tool - e.g. the freeware :


[1] Total Differential Errors in One-Port Network Analyzer Measurements with
Application to Antenna Impedance:


[2] Measurement Uncertainty in Network Analyzers: Differential Error Analysis
of Error Models Part 1: Full One-Port Calibration:


[3] Measurement Uncertainty in Network Analyzers: Differential Error Analysis of
Error Models Part 2: Full Two-Port Calibration:


[4] S-Parameter Uncertainties in Network Analyzer Measurements with
Application to Antenna Patterns:


[5] Measurement Uncertainty in Network Analyzers: Differential Error
Analysis of Error Models Part 3: Short One-Port Calibration - Comparison:


[6] Measurement Uncertainty in Network Analyzers: Differential Error
Analysis of Error Models Part 4: Non-Zero Length Through in Full
Two-Port SLOT Calibration:


[7] Measurement Uncertainty in Network Analyzers: Differential Error
DE Analysis of Error Models Part 5: Step-by-Step Graphical
Construction of Complex DE Regions and Real DE Intervals:


Sincerely,

yin&pez@arg

7

Hi Rune,

Wow - Your amazing!!! Looks perfect!

Many thanks!
Tom
VA7TA

qrp.ddc wrote …
Hope they will not use integrated ADC, because it will reduce performance a lot.
---------------------------------------------------------------------------------------------------------------

qrp.ddc,

That issue was raised and the reply was:

"The VGA will extend dynamic range to 100dB, plus ADC dynamic range is nowhere near being the bottleneck"

"ADC dynamic range is far from being the bottleneck. If the ADC is sampling at 1Msps and the VBW is 1kHz, a 60dB ADC dynamic range leads to a 90dB measurement dynamic range, which is more than sufficient."

"I have a prototype of a NanoVNA variant using the built in ADC on the stm32. The measurements using it are nearly identical to the audio codec variant. The reason all NanoVNAs on the market do not use this version is because of software compatibility."

Hope they the design team is correct and we don't see the degradation in performance you anticipate by removing the audio codec.

Herb

From: Dr. David Kirkby from Kirkby Microwave Ltd

The name of my company, it's company number, where it is registered, and
the registered address is required under UK law.

I would have thought my messages are shorted than most, as I only quote
relevant content, and remove all irrelevant stuff.
===========================

David,

I do like that you make an attempt to include a brief summary of the topic to which you are replying. All to often this is missing, making it more difficult for those of use reading the group via e-mail.

BTW: four lines of signature is the recognised Internet etiquette.

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