Re: hi how so i run console comands on my vna,its the first version.
Connect it via USB and open the serial port in a terminal program, bitrate etc. is not relevant. Type e.g. "help" to see the available commands.
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hi how so i run console comands on my vna,its the first version.
Do i need to connect it to my pc,if so how,i see no guides for doing it.thanks+73
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I have two other nanoVNAs but I find myself reaching for the SAA-2N most often. The calibration kit and cables provided are of good quality and have held up (so far). For higher frequencies I have a LibreVNA but it is in a different class of instruments and an order of magnitude more costly.
73, Don N2VGU
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many of the models can be easy improved (lower noise above 2 ghz with just some decoupling caps added) .. i bet yours is similar :-)
dg9bfc sigi
ps welcome in the group of fancy smith diagramms , antenna tests and other nice things your can test with the nanos
Am 19.08.2023 um 16:31 schrieb fcusa@...:
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Hi, I just got my SAA-V2 clone 3.2" "black and gold" (info link ) from ebay.
I'm very happy with it. Cost less then $100 and cover up to 4GHz can also measure my wifi and cellphone gears.
Have a good day.
FC
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I have the H H4 SAA2N and the F models and use them in different applications. If you intend to use it outdoors I strongly recommend the F model with the pushbuttons. It has the brightest display which is necessary outdoors.
The buttons are easier to control? than the thumbwheel switch.
The different vnas have different adapters, such as BNC, UHF and N connectors. I use BNC, UHF and BNC OSLThru cal kits for each device.
Mike N2MS
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On 08/19/2023 11:08 AM EDT David J Taylor via groups.io < david-taylor@...
wrote:
On 19/08/2023 13:34, Nuno Lopes - CT2IRY via groups.io wrote:
Hi guys, this is my first post here, I would like an advice to buy a new
VNA, my main operation is till 50MHz, but eventually I can operate till
1.2GHz, what would be a good VNA to buy, H4; F; SAA.
Can anyone recommend one.
Thanks
Nuno
CT2IRY
Welcome to the group, Nuno.
Do take a look at the Wiki:
/g/nanovna-users/wiki
Whatever you get, buy from the original manufacturer if at all possible.
Avoid
clones! I have several NanoVNA models and am happy with the H4 and its SMA
connectors (the H4 is reputed to need regular charging every few months as
the
physical on-off switch still leaves some slight drain).
Consider whether you want to use it outdoors, and whether SMA or N-type
connectors are better for you. Do you need to measure crystal filters?
Others will doubtless chip in with their own choice!
73,
David GM8ARV
--
SatSignal Software - Quality software for you
Web:
Email: david-taylor@...
Twitter: @gm8arv
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Hi, I just got my SAA-V2 clone 3.2" "black and gold" (info link ) from ebay.
I'm very happy with it. Cost less then $100 and cover up to 4GHz can also measure my wifi and cellphone gears.
Have a good day.
FC
|
On 19/08/2023 13:34, Nuno Lopes - CT2IRY via groups.io wrote: Hi guys, this is my first post here, I would like an advice to buy a new VNA, my main operation is till 50MHz, but eventually I can operate till 1.2GHz, what would be a good VNA to buy, H4; F; SAA.
Can anyone recommend one.
Thanks
Nuno
CT2IRY Welcome to the group, Nuno. Do take a look at the Wiki: /g/nanovna-users/wikiWhatever you get, buy from the original manufacturer if at all possible. Avoid clones! I have several NanoVNA models and am happy with the H4 and its SMA connectors (the H4 is reputed to need regular charging every few months as the physical on-off switch still leaves some slight drain). Consider whether you want to use it outdoors, and whether SMA or N-type connectors are better for you. Do you need to measure crystal filters? Others will doubtless chip in with their own choice! 73, David GM8ARV -- SatSignal Software - Quality software for you Web: Email: david-taylor@... Twitter: @gm8arv
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Hi guys, this is my first post here, I would like an advice to buy a new VNA, my main operation is till 50MHz, but eventually I can operate till 1.2GHz, what would be a good VNA to buy, H4; F; SAA.
Can anyone recommend one.
Thanks
Nuno
CT2IRY
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Re: Nano VNA Firmware Upgrade
I have.
Luckily it was still within the return period on ebay
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Re: Nano VNA Firmware Upgrade
So far I haven't seen any incompatible clones of the Nano H or H4.
Maybe I missed some ...
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On Fri, 18 Aug 2023 at 16:39, KD2YYI <tim.sooley@...> wrote:
While that is technically true, its only possible if you either made a backup of the firmware on the unit prior to flashing the new firmware or were able to find the firmware originally on the unit.
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On 8/18/23 8:15 AM, Brian Beezley wrote: On Tue, Aug 15, 2023 at 09:25 PM, Jim Lux wrote:
Sometimes, I find the derivative of unwrapped phase (group delay) more useful,
too.
Jim, your comment inspired me to add group delay to my program. I don't see its relevance for ground probe data, but it provides a powerful diagnostic tool that can reveal anomalies otherwise invisible. The first two plots show an ordinary-looking phase plot and the corresponding group delay plot. The big group delay spike corresponds to a barely perceptible flat spot in the phase curve. It's easier to see in the third plot with a narrower frequency span. I think it's due to a VNA frequency stepping issue.
Yeah, derivatives do accentuate noise - but sometimes that's actually useful to spot a discontinuity in a system that should otherwise be "smooth" And when you have multiple resonances, is makes them obvious.
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Make sure you are taking frequency steps that are small wrt to the DUT bandwidth. GD on a xtal filter is one example.
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Re: Nano VNA Firmware Upgrade
. . . and far, far, less portable (IE not an option for all, unlike Cube) . . .
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--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
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On Tue, Aug 15, 2023 at 09:25 PM, Jim Lux wrote:
Sometimes, I find the derivative of unwrapped phase (group delay) more useful,
too.
Jim, your comment inspired me to add group delay to my program. I don't see its relevance for ground probe data, but it provides a powerful diagnostic tool that can reveal anomalies otherwise invisible. The first two plots show an ordinary-looking phase plot and the corresponding group delay plot. The big group delay spike corresponds to a barely perceptible flat spot in the phase curve. It's easier to see in the third plot with a narrower frequency span. I think it's due to a VNA frequency stepping issue. Brian
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Re: Nano VNA Firmware Upgrade
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Re: Nano VNA Firmware Upgrade
While that is technically true, its only possible if you either made a backup of the firmware on the unit prior to flashing the new firmware or were able to find the firmware originally on the unit.
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Re: Nano VNA Firmware Upgrade
These things can't be bricked, in the worst case scenario you would
need a $2 ST Link clone to
flash the firmware.
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On Fri, 18 Aug 2023 at 14:21, KD2YYI <tim.sooley@...> wrote:
Hi,
Follow this guide:
If your not sure if your Nanovna is an official one or not, do not upgrade or risk bricking your unit.
Tim.
KD2YYI
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Re: Nano VNA Firmware Upgrade
Me as well.
I have 2 desktops
Both running windows 11
One is a custom built amd gaming system and the driver did not work.
The other is a customer built intel system functioning as a file server.
Drivers worked just fine.
both were done with the same downloads and exact same process was followed.
Same windows 11 build as well.
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Re: Nano VNA Firmware Upgrade
I've just been down this road, encountering many problems. My environment is MacOS Ventura 13.5 on a Macbook Air M1. I also run Windows 11 in a virtual machine with VMware Fusion. I could never get the drivers installed on Windows 11 for the VanoVNA software. In my case, there were too many variables: Windows 11, W11 running in a VM, and USB support with a thunderbolt dock. I finally am using STM32CubeProgrammer (which runs on windows, linux, and MacOS). I extracted my existing VanoVNA-H FW from the device. I couldn't reconcile the extracted FW's size, so I looked for another means of extraction, dbutil. It also runs on windows, linux, and MacOS. I installed on MacOS (easy install with homebrew). I then extracted my VanoVNA-H FW from device for safe keeping. I happen to have a spare VanoVNA-H, I have to return by early Sept. This turned out to be a good test device, although I have read in many threads that the NanoVNA-H is nearly impossible to permanently brick. I have flashed several different FWs and then returned to original. If you can get past the driver issue on windows, the rest is a breeze. I would still recommend STM32CubeProgrammer.
Peter
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Re: Nano VNA Firmware Upgrade
Hi,
Follow this guide:
If your not sure if your Nanovna is an official one or not, do not upgrade or risk bricking your unit.
Tim.
KD2YYI
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Ho-Ro
Donald S Brant Jr
David J Taylor
