Re: Homebrew Female SMA standards and T-Check
Hi Allison Sure they will work fien with thee NanoVNA as the difference in offset delay is very small as the NanoVNA is designed for ideal calibration kit except the open is compensated by 50fF. But you are not calibrating to the calibration plane of the Female adaptor of the NanoVNA or the Male adaptor at the end of the test cable if using a such. However the Display/Scale/Electrical delay in the NanoVNA can fix it if you enter the offset delay of the male versus female short. Kind regards Kurt -----Oprindelig meddelelse----- Fra: [email protected] < [email protected]> P? vegne af aparent1/kb1gmx Sendt: 16. december 2019 02:29 Til: [email protected]Emne: Re: [nanovna-users] Homebrew Female SMA standards and T-Check One last, many of the HP loads are air, the most often home made open and short are PTFE loaded, there is a VF difference. The HP load is definately air (minimal dielectric) to the resistance. The open and short are for my set air. I have them to calibrate the HP4191A I have and work well for the nanovna. Allison -- ----------------- I do not accept private email due to forum scraping groups.io
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Re: Are any of the NanoVNA sold on Amazon any better or worse than any others? Is there a better U.S. site to order from?
Hugen,
What will be the price of the new version? And when it comes out, will the older version still be available?
BruceN, K4TQL
--
*"To invent, you need a good imagination and a pile of junk"* -- Thomas Alva Edison (1847-1931)
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Re: Homebrew Female SMA standards and T-Check
Hi Rudi,
The MATLAB T-check script is part of a package of scripts written by Dick Benson, W1QG, and downloadable from the Matlab Central:
Please note that it requires MATLAB's "RF Toolbox", so I do not know if it is compatible with Octave. Give it a try, maybe it will work.
And note that the T-check script works with an S2P file.
Best of luck!
- Jeff, k6jca
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Re: Homebrew Female SMA standards and T-Check
Allison, Dave, and Kurt, many thanks for your replies.
Dave -- thank you very much for the "flush thru" description. That explains a lot, and it was a key bit of info that I lacked.
Kurt -- I'll attempt some accurate characterization when I return home (I am "on the road" at the moment). I found some APC-7 terminated airline in the back of a drawer a few days ago, so that should help me characterize C0. Thanks very much for your advice.
Allison -- I am intrigued as to how you are using your 4191A. I have one, too, but I've been using it with the stock fixture. Am I correct in assuming your are adapting its APC-7 to an SMA cable, and then making your measurements at the end of that cable? And where are you defining your reference plane?
Again, thanks to all.
- Jeff, k6jca
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I would like to thank all the replies to my initial message. Unfortunatelly, the firmware was an old one that didn't allow me to go into a config menu. I also made sure to jumper the boot0 and Vcc.
In the meantime, I had a great assistance from Igor, PY3IG, who told me to install the proper Win10 driver. Once done, everything else went smoothly. My hats off to Igor for his assistance and Youtube videos.
73,
Luciano PT9KK
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Windows 10 has the drivers on board, not necessary to run Zadig. The device should show up under "Ports (Com? & LPT)" as "Serial USB Device (COM3)" eg ,? NOT under "Serial Bus-Controllers". if so DELETE the drivers there. Then connect the device to an USB port, the drivers will be installed on the right place automatically. Then run DFUse to flash the firmware.
Success
Jos
Op 15-12-2019 om 23:06 schreef Luciano Gasparini:
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I received a nanoVNA last week and tried to upgrade it. I ran Zadig and updated the drive according to Zadig's default suggestion.
Once done, I sort circuited the boot0 and Vcc terminals, connected the USB cable to my computer running Win10, but couldn't see it in DFU mode under Device Manager. Am I missing something?
I did installed the D2 diode before all that so to have a battery level on display.
73,
Luciano PT9KK
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Hi Oscar,
Use it and don't worry about being a clone or not a clone.
If Hugen hadn't cloned from edy555, you wouldn't have to worry now.
By the way, everyone works from a set, if there is a difference, it is revenge of the scrap.
73, Gyula, HA3HZ
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On Mon, Dec 16, 2019 at 10:27 AM, Oscar A wrote:
Hi Hugen,
I recently purchased my from ALI Express.
I am totally new to the VNA.
How can one identify if it is a clone or not.
Regards
Oscar
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Hi Luciano,
You are writing that there was no D2 diode, which is likely to give you an earlier firmware version of nanoVNA.
Therefore, ignore the "Menu -> Config -> DFU" message as you do not have it in the firmware yet.
Download USBDeview (92kB) to see which USB drivers have been installed on your machine since your operating system was installed, and a green circle at the beginning of this line indicates what is in use.
For the DFU (Device Firmware Upgrade) to work properly, you need the en.stsw-stm32080.zip file, which contains the installation program and the driver needed to detect nanoVNA. Download and install it after a short registration. Then short-circuit the VDD and BOOT0 points of the P1 connector and insert the USB plug into the PC. NanoVNA with white screen indicates that it is in DFU mode. If your machine really sees nanoVNA, you can use DfuSe to update the firmware.
If the above process does not work, you will need to extract a ST-Link v2 dongle that you can use with en.stsw-stm32102.zip. I do not write down the details because can read to the forum many times. Use the "Search" button with short sentences.
Note that for the first time I only succeeded with the ST-Link v2 dongle.
I wish you a successful update.
73, Gyula HA3HZ
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Re: Homebrew Female SMA standards and T-Check
Hello Jeff,
You have made an interesting T-Check measurement in post 8236, date 2015-12-15 16:19.
Is your MATLAB script "Cal_T_Check.m" also usable with Octave under Linux?
73, Rudi DL5FA
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Hi Hugen,
I recently purchased my from ALI Express.
I am totally new to the VNA.
How can one identify if it is a clone or not.
Regards
Oscar
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On 16-Dec-2019, at 11:31 AM, hugen@... wrote:
I have made these changes, but I always get an error interrupt. It may be caused by some register values not being reset properly.
hugen
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On Mon, Dec 16, 2019 at 03:56 PM, Ady, YO2NAA wrote:
Dear Hugen,
that's good news. I would recommend the store to my friends. We appreciate
your work.
I see that shipping is 15$ for my country (Romania), also for some EU
countries, but for other EU countries shipping is free.
Is there a way we can order with free shipping?
Thank you and best regards,
Adrian
You can contact Maggie to modify, Maggie will choose the appropriate courier, most European countries do not need to add additional postage. hugen
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Greetings,
I am unable to complete the checkout process with two different credit cards. Do you take Paypal?
Dave W6TE
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-----Original Message----- From: [email protected] < [email protected]> On Behalf Of hugen@... Sent: Sunday, December 15, 2019 9:33 PM To: [email protected]Subject: Re: [nanovna-users] My nanoVNA does't go into DFU mode #improvement #improvement #improvement #improvement #improvement There are more than 5 clones of NanoVNA-H at present, some are with shielding cases. But due to their wrong assembling, the performance decreases. Assembling the shielding case is to isolate effectively, but if they connect the shielding case of CH0 with CH1, it will sharply decreases the performance. Although some clones are with good performance, we could only make judgement after testing. I am quite annoyed, because some irresponsible agents sell inferior clones which marks as my version, it is a serious cheating. I have updated NanoVNA-H to version 3.4 after I received much feedback from the community. It is under assembling&testing at present. It works well till 1.5GHz in the present testing. Meanwhile, I changed the power chip and the battery to 650mAH which further decreases the noise from the usb charging. In addition, it could work 4 hours after these changes. If everything goes well, the new version will come to the market on Dec.20. You could buy from Maggie through this link: ;data=02%7C01%7C%7C9324efba68a34e01c22508d781e96641%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637120711744625610&sdata=KJ6pthWOruJKO%2Fb46zH%2BrjiqaR3KxChn1BIrCrGifig%3D&reserved=0 hugen
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Dear Hugen,
that's good news. I would recommend the store to my friends. We appreciate
your work.
I see that shipping is 15$ for my country (Romania), also for some EU
countries, but for other EU countries shipping is free.
Is there a way we can order with free shipping?
Thank you and best regards,
Adrian
toggle quoted message
Show quoted text
On Mon, Dec 16, 2019 at 7:32 AM <hugen@...> wrote: There are more than 5 clones of NanoVNA-H at present, some are with
shielding cases. But due to their wrong assembling, the performance
decreases. Assembling the shielding case is to isolate effectively, but if
they connect the shielding case of CH0 with CH1, it will sharply decreases
the performance. Although some clones are with good performance, we could
only make judgement after testing. I am quite annoyed, because some
irresponsible agents sell inferior clones which marks as my version, it is
a serious cheating. I have updated NanoVNA-H to version 3.4 after I
received much feedback from the community. It is under assembling&testing
at present. It works well till 1.5GHz in the present testing. Meanwhile, I
changed the power chip and the battery to 650mAH which further decreases
the noise from the usb charging. In addition, it could work 4 hours after
these changes. If everything goes well, the new version will come to the
market on Dec.20. You could buy from Maggie through this link:
hugen
|
I have made these changes, but I always get an error interrupt. It may be caused by some register values not being reset properly.
hugen
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The firmware for NanoVNA-H needs to be recompiled before it can be used. You need to modify the MCU and LCD drivers and some UI changes. You can view the code of AA6KL. AA6KL has completed most of the work. Measurements up to 1.5G are difficult to guarantee 50dB dynamics. The current test results seem to be able to obtain relatively accurate measurements in a dynamic range of 40dB.
hugen
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Re: Are any of the NanoVNA sold on Amazon any better or worse than any others? Is there a better U.S. site to order from?
There are more than 5 clones of NanoVNA-H at present, some are with shielding cases. But due to their wrong assembling, the performance decreases. Assembling the shielding case is to isolate effectively, but if they connect the shielding case of CH0 with CH1, it will sharply decreases the performance. Although some clones are with good performance, we could only make judgement after testing. I am quite annoyed, because some irresponsible agents sell inferior clones which marks as my version, it is a serious cheating. I have updated NanoVNA-H to version 3.4 after I received much feedback from the community. It is under assembling&testing at present. It works well till 1.5GHz in the present testing. Meanwhile, I changed the power chip and the battery to 650mAH which further decreases the noise from the usb charging. In addition, it could work 4 hours after these changes. If everything goes well, the new version will come to the market on Dec.20. You could buy from Maggie through this link:
hugen
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Re: errors of "error" models
ann : we just finished the experimental comparison - the results verified our predictions for two constructed two-ports - #83 : On the Doubtfulness - 13 December 2019 - /g/nanovna-users/message/8173
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Re: Homebrew Female SMA standards and T-Check
One last, many of the HP loads are air, the most often home made open and
short are PTFE loaded, there is a VF difference.
The HP load is definately air (minimal dielectric) to the resistance.
The open and short are for my set air.
I have them to calibrate the HP4191A I have and work well for the nanovna.
Allison
--
-----------------
I do not accept private email due to forum scraping groups.io
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Menu -> Config -> DFU
nothing else need
vy73 de Teo
Am 16.12.2019 um 00:01 schrieb Herman De Dauw:
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Have you read the Wiki files for upgrading ? Zadig is not nessecary. And you need to place the boot switch of jumpers needed to start in DFU mode.
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Have you read the Wiki files for upgrading ? Zadig is not nessecary. And you need to place the boot switch of jumpers needed to start in DFU mode.
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Kurt Poulsen
Gyula Molnar
gin&pez@arg