Re: Nanovnasaver fails to connect to SAA2 and crashes
For me connecting my Anytone AT-D578 caused a conflict of some kind which makes accessing either it or the NanoVNA impossible. Look for "GD32 Virtual Com Port" in Device Manager. That could be your culprit.
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73 es God Bless de Ron KK1L <><
KK1L.COM ( )
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Metrology level uncertainty study is a humbling science that few engineers understand, including me. I work with VNA data to over 100GHz daily, TDRs over 50GHz, I develop my own cal standards, blah blah blah. I cannot tell you what the measurement uncertainty is in my S11 magnitude at 90GHz for a given reflection coefficient.
In fact, for wafer probing, I personally know guys who developed a lot of this stuff at Cascade Microwave and they struggle.
But from a practical perspective, we have good rules of thumb. We know where our problem areas are (gamma near one, causality of noisy data, reference planes near mode disruptions, SOLT assumes lossless open). So, I usually know how to identify ¡°good enough¡± data. But as was stated earlier, it sure helps if I only measure time with one clock :)
There are some smart dudes on these message boards though, I¡¯ll keep lurking and learning.
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Re: Nanovnasaver fails to connect to SAA2 and crashes
On Fri, Jun 24, 2022 at 03:28 AM, tuckvk3cca wrote:
Firmware version 20200501.
It was running ok until I switched back to a H1 which somehow captured the Com
4 port and the SAA2 no longer recognises it and crashes. This is the error
report before it crashed
(Reminder that copy and pasting into groups.io as text means this traceback would be searchable and easily copied by others.) There are similar "Issues" reported at Check to see if any of the similar reports helps you, especially those that refer to SAA2. In a pinch you might need to simply try a more recent version of the application, or see if you can install the tiprev version (assuming you are not already at that latest version). My understanding is that Saver depends on recent firmware on the device(s) as well.
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Re: Nanovnasaver fails to connect to SAA2 and crashes
Firmware version 20200501.
It was running ok until I switched back to a H1 which somehow captured the Com 4 port and the SAA2 no longer recognises it and crashes. This is the error report before it crashed
I have tried restarting my Computer and replugging the SAA2 USB wherein win 10 went through a driver installation again. It didn't help. The H1 still runs ok btw.
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Re: Nanovnasaver fails to connect to SAA2 and crashes
You should share the details, like the error message and probably firmware version. Share what steps you've take so far to solve this.
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Nanovnasaver fails to connect to SAA2 and crashes
My Saver program running perfectly under Win10 for the last few days has now decided to fail to connect to my SAA2. It returns some error failure on the DOS screen and then crashes. Anyone has any ideas on how to fix this?
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Re: Purchase of V2 from R & L Electronics
Many thanks for that advice. I couldn't agree more. That's why I wanted to
make the purchase through R & L and not someone offshore. R & L have proven
themselves to be rock solid reputable people over the years.
Even if they are selling outdated clones and not the latest and greatest
model, they have a lot of very happy customers. Technology like the VNAs
evolves very rapidly. I usually have better experience buying technology a
generation or two behind. The newest stuff often has bugs just like the
older stuff did.
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On Thu, Jun 23, 2022, 12:41 PM ae1th@... <ae1th@...> wrote: use r&l , they have a phone, they have a real mailing address, they have a
real store, and there are people you can talk to if needbe, good people,
the other place, is just a passthru shop, good luck if you need to return
or warrenty support,.
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Re: Purchase of V2 from R & L Electronics
use r&l , they have a phone, they have a real mailing address, they have a real store, and there are people you can talk to if needbe, good people, the other place, is just a passthru shop, good luck if you need to return or warrenty support,.
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Hi Gyula - trying your website, I got an emoji with a zipper across the mouth and a message in Hungarian. Fortunately my google-translate has the camera option and told me that your website is down for maintenance. However I have visited before and you do have plenty of excellent info! Cpuld you post here when your site is back up? tnx!
--
72/73 de k1qed, ?bob.c ? ? ? ? qrp 4evr!
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I have had a similar problem with one of my analyzers.?
It only likes relatively small memory cards.? ?Got any 1 or 2 gigs?
You really don't need anything as big as a 32 gig.
Kent WA5VJB
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On Wednesday, June 22, 2022, 10:17:17 PM CDT, Clyde Lambert <clyde.lambert@...> wrote:
Aparently most newer cards do not work. I have tryed 11 different? manufacturers SD 32 Gig cards and none of them work. Aparently You need one of the older style SD cards.
I found 2 older 16 Gig cards, and both work. I will still try other 32 Gig cards, but for now, will use the 16 Gig cards.
Clyde Lambert KC7BJE
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Aparently most newer cards do not work. I have tryed 11 different manufacturers SD 32 Gig cards and none of them work. Aparently You need one of the older style SD cards.
I found 2 older 16 Gig cards, and both work. I will still try other 32 Gig cards, but for now, will use the 16 Gig cards.
Clyde Lambert KC7BJE
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Re: Purchase of V2 from R & L Electronics
CORRECTION: that was a VNA-64 (not 65) sorry.
Mike C.
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On 6/21/2022 4:01 AM, John Reves WD8JLV wrote: I am totally new to Nano VNA and earning. Was planning to purchase a
NanoVNASAA2N from R & L Electronics. Then I discovered that Tindie seems to
be the "official" source of the V2's etc. Would appreciate hearing from
others here about R & L vs Tindie. Will I be making a mistake to buy from R
& L rather than Tindie? The price difference of about $100 would be a small
saving if I can expect to have problems with the R & L clone. Comments on
thus most welcome. Also posted this on the V2 group but no activity there
since May so not sure how alive that group is.
Thanks in advance!
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Re: Purchase of V2 from R & L Electronics
Hi John,
FWIW, I purchased 2 units (tinySA and VNA-65) both from R&L and I am a happy camper. (i.e. no problems, your mileage may vary)
Mike C
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On 6/21/2022 4:01 AM, John Reves WD8JLV wrote: I am totally new to Nano VNA and earning. Was planning to purchase a
NanoVNASAA2N from R & L Electronics. Then I discovered that Tindie seems to
be the "official" source of the V2's etc. Would appreciate hearing from
others here about R & L vs Tindie. Will I be making a mistake to buy from R
& L rather than Tindie? The price difference of about $100 would be a small
saving if I can expect to have problems with the R & L clone. Comments on
thus most welcome. Also posted this on the V2 group but no activity there
since May so not sure how alive that group is.
Thanks in advance!
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Thank you - you've done a lot of work with the nanoVNA, it looks very interesting - Mark/K4LFL
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Re: Purchase of V2 from R & L Electronics
I have been happy with my SAA-2N from R&L.
73, DOn N2VGU
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Re: NanoVNA for RFID design
But why would anyone want an RFID reader that can read cards over 10" away My application is something like a bracelet antenna. Not spying. Lol. But as to the "short" calibration of the coil. According to an ST rep: "The idea is to calibrate away the characteristics of the pickup coil, and be able to only sense the characteristic of the reader or tag antenna - since the antenna is still connected during the "short" calibration. A OSL calibration would only calibrate the VNA port + cable. The characteristic of the pick-up coil would overlap with the characteristic of the reader or tag antenna." My nanoVNA has the OSL calibrations. And Through and Isolation calibrations. That's all. So, unless the "short" calibration of the coil can be arrived at via those and/or measurement methods, I guess I'm screwed.
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Re: Purchase of V2 from R & L Electronics
John,
I have been entirely satisfied with the two SAA-2N units I bought from R & L.
--John Gord
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On Tue, Jun 21, 2022 at 01:09 AM, John Reves WD8JLV wrote:
I am totally new to Nano VNA and earning. Was planning to purchase a
NanoVNASAA2N from R & L Electronics. Then I discovered that Tindie seems to
be the "official" source of the V2's etc. Would appreciate hearing from
others here about R & L vs Tindie. Will I be making a mistake to buy from R
& L rather than Tindie? The price difference of about $100 would be a small
saving if I can expect to have problems with the R & L clone. Comments on
thus most welcome. Also posted this on the V2 group but no activity there
since May so not sure how alive that group is.
Thanks in advance!
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Can you see more info on my site
--
Gyula HA3HZ ( )
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Re: Purchase of V2 from R & L Electronics
I bought my Nanovna H4 from R&L and with the exception of not getting the
"open" calibration standard it has worked fine.I have heard that you don't
really need that calibration standard but they are sending me one.
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On Tue, Jun 21, 2022, 3:09 AM John Reves WD8JLV <jrev@...> wrote: I am totally new to Nano VNA and earning. Was planning to purchase a
NanoVNASAA2N from R & L Electronics. Then I discovered that Tindie seems to
be the "official" source of the V2's etc. Would appreciate hearing from
others here about R & L vs Tindie. Will I be making a mistake to buy from R
& L rather than Tindie? The price difference of about $100 would be a small
saving if I can expect to have problems with the R & L clone. Comments on
thus most welcome. Also posted this on the V2 group but no activity there
since May so not sure how alive that group is.
Thanks in advance!
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Re: Measure a single wire (not coax) for frequency
On Mon, Jun 20, 2022 at 08:38 PM, Brian Donaldson wrote:
I'm not building an antenna. All I want to know is if the NanoVNA can show me
return loss peaks with a single length of stranded wire. Nothing more. I have
an antenna and it works just fine. Don't need an antenna.
If the NanoVNA cannot do a single wire return loss reading, then fine.
People are just mentioning that the VNA is transmitting very small amounts of power on that wire as if it was an antenna, and thus it will start behaving like one. You don't really have a choice if it does! And folks are pointing out that it's going to find an image antenna to work against, which is probably your "feedline" -- i.e., the VNA itself. If you are holding the VNA, like a handi-talkie it may use _you_ as the counterpoise! Whether or not this affects the values, or to what extent, depends on a lot of factors. But, if you are measuring something then the recommendation is to know what you are measuring. This might be an opportunity to try different measurement setups. Put another way: what is it that we expect to measure by looking at the S11 port reflection values along a single wire? It's not that it can't measure a wire, but rather what we expect from doing so, if not thinking of that wires as some electrical wavelength of an antenna?
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KK1L Ron
F4WCV
John Reves WD8JLV
Clyde Lambert
Mike C.
Donald S Brant Jr
tjackson382000
HA3HZ
Mike McKinney