开云体育

I have a "classic" nanoVNA from Hugen, splash screen just
says "gen111.taobao.com", powers up with four traces.
Has been quite useful as it was shipped.

I plan to load Hugen's current nanoVNA-H firmware:

and then use nanovna-saver on an Ubuntu box:


Lots of current discussion in the forum about the highly regarded
work of DiSlord and OneOfEleven, should I consider moving to that instead?
Perhaps some other firmware and (hopefully linux friendly) host software?
Here's Oristo's list of the various firmware options as of 10/2019:
/g/nanovna-users/message/5949

But that doesn't fully describe things, and is badly out of date.

I haven't had time these last 12 months to follow along in the forum.
The nanoVNA universe is expanding rapidly, it's awfully confusing.
Unless you already know pretty much everything, the forum wiki
creates more questions than it answers:
/g/nanovna-users/wiki
For example, exactly what are the differences between the edy555 nanoVNA,
the Hugen nanoVNA, the Hugen nanoVNA-H, and the Hugen nanoVNA-H4?
Here's a start, the wiki should have this and much more:
/g/nanovna-users/topic/65362239

Wiki also needs information for the new user who has just unboxed a nanoVNA.
I was totally stumped last year till I found this:

/g/nanovna-users/topic/65362239
The current wiki is not any better in that regard.

Here's a very old thread, at least some of which had to do with creating
a tutorial to get the new user going:
/g/nanovna-users/topic/34589622
I'm still planning to write a tutorial on complex impedances,
aimed at the ham with with an understanding of little more than
Ohms Law and perhaps SWR readings.

Jerry, KE7ER

If you're looking for an inexpensive wideband spectrum analyzer, the
tinySA project may have what you are looking for.

For narrowband spectrum analysis, it's hard to beat a good SDR receiver.
The spectrum display will show you what you're looking for, with excellent
resolution.

The development is driven by multiple entities with various commercial
interests often in
competition with each other. The confusion comes from the name, multiple
projects with
practically the same name.

Попросить можно, но не сдесь!:)

On 8/8/20 9:32 AM, Hugo wrote:

I ask myself a question, does the development of several other "NanoVNA" products with the same spirit not overshadow all of the products? Will he not be later more difficult to have support and software development on all products?
I have the impression that the products will die by themselves for lack of development and that they will be considered as disposable ... I am looking for the best product with the best "hardware" AND software but I wonder if I should wait for the 3 other products that have been announced instead of taking the NanoVNA 2 N ...
This is a constructive reflection and not a criticism.

That's an interesting question - a couple thoughts:

1) The products are inexpensive and technology is advancing rapidly. Rather than try an upgrade a 3 year old nanoVNA, I suspect it would be more effective to just buy the current $50 VNA. Would you try to resurrect that old Pentium sitting in the garage?

2) Later products do benefit from the development of the earlier ones - more from finding usability issues, features that are either not worth it or "wow that's really handy".

3) This kind of thing is revolutionizing the test equipment market all up and down the price spectrum. The days of buying a big hunk of RF test equipment (like a HP 141T or a 8663B) and carefully maintaining it for 20-30 years are essentially over, even in the top end market. There is always a market for highly specialized features, but in the main line, it's really changing - USB pod RF power meters are now a standard lab item that cost around a kilobuck for a high quality one. In professional environments, the ability to have the cal tables and docs embedded in the instrument is really useful. Sure, I love my 848X thermistor heads and they gave great service as I connected them to successive generations of meters. But I think the modern parts work better, especially in a system. And if I really, really had to have something specialized, I'd have to either build it, or find someone who knows how - and they're omnipresent. You want that NIST Type IV RF power meter because you have to duplicate some measurements from 1980 - you can do it.

But for day to day "how much RF is in the wire" - that $600 pod is pretty attractive - and if I blow it up, I can get a new one in days.

In the RF world, products like the USB signal generators, spectrum analyzers, and VNAs are really handy - they're sort of the RF equivalent of the DMM (or oscilloscope).

ANd the fact that a lot of the functionality is in software - and mass producible hardware with cheap parts - means that you CAN get a $50 VNA that is smaller, easier to use, etc. It may not have the HP/Agilent/Keysight name on the panel. It may not have NIST traceable calibration from the factory. It may not have a warranty. But the vast majority of uses don't need those things.

DiSlord-А прошивку для Н можно попросить?

Hugo,

Consider your first H4 model as a learning tool.? Order it from R&L Electronics.? Learn, play, upgrade the

firmware.

Then, when the new models come out and are proven, sell your H4 on ebay.? Cheap way to get an education.

Glen K4KV

I ask myself a question, does the development of several other "NanoVNA" products with the same spirit not overshadow all of the products? Will he not be later more difficult to have support and software development on all products?
I have the impression that the products will die by themselves for lack of development and that they will be considered as disposable ... I am looking for the best product with the best "hardware" AND software but I wonder if I should wait for the 3 other products that have been announced instead of taking the NanoVNA 2 N ...

This is a constructive reflection and not a criticism.

Thank you!

Also work command promt gain command for apply ADC internal amplifier gain from 0 to 95
For example set 50dB gain
'gain 50'

Simple SA in ADC range 192k (-96k to +96k) around Center frequency
(Offset frequency disabled for measure input)
Connect generator to CH1 input and set 30.050MHz output

On nanoVNA set:
Center freq 30MHz
Span 192k (it just for markers)
Disable all traces except 1
Format Logmag
Ref level 0
Scale 15

No mirror suppresion!! No level calibration!!
Just for Proof of Concept

For persinal use (no any sources):

The dim doctor again, here. I think I understand a bit better now.

Might I suggest that the fft code added could produce a very useful narrow band spectrum analyser feature to the Nano, with a narrower minimum resolution bandwidth than the Tinysa.

Yes there might be odd spurs which would have to be sorted out by the operator, perhaps by a tiny frequency change of the signal being examined, or a nudge to the centre frequency of the Nano. But that is half the fun for us hobbyists, especially if one has access to resolution bandwiths otherwise only available on very expensive kit, or cobbling up a sdr dongle into a compurer somehow ( I have managed to display “apparent” resolution bandwidths of 10hz using a rsp1 sdr box - I do not know if it was real, but it looked impressive on the computer screen).

At ?50, special firmware on a dedicated extra Nano (I already have two) just for very narrow rbw would be worth having. I presume the minimum useful rbw would be limited by the device’s phase noise of the various oscillators.

Steve L. G7PSZ

Take it out of the case you've mounted it in and see if something is intermittently pressing on the touchscreen. If it works as you originally received it with no housing, you can go from there.?



On Fri, 7 Aug 2020 at 7:15 PM, Steve Haber<haber.steve@...> wrote: My nana VNA it seems to be doing very weird things. The first picture is the current firmware loaded version. The second picture is what the screen looks like when I first power it on. The third picture is after calibration. Can't seem to get it to stabilize. Any ideas? I wonder if I got a crappy one?

My nana VNA it seems to be doing very weird things. The first picture is the current firmware loaded version. The second picture is what the screen looks like when I first power it on. The third picture is after calibration. Can't seem to get it to stabilize. Any ideas? I wonder if I got a crappy one?

It would require an external mixer, and external 2nd LO, and some amps.l
I suggest the

On Fri, Aug 7, 2020 at 01:07 PM, <lobos305@...> wrote:

Isn't someone in the group working on a SA/TG project for the Nano?
========================================
A SA/TG provides pretty much the same functionality as an s21 measurement on the NanoVNA - without the additional phase information. As Erik pointed out in an earlier post, and loosely quoted by me :

"Adding a FFT code/mode would allow the use of a nanoVNA as a narrow band spectrum analyzer using the CH1 input with the disclaimer there is NO mirror suppression so interpreting what you see can be VERY difficult"

I try to keep up with new NanoVNA developments and as far I know there are no combined NanoVNA/spectrum analyzer projects in the works. Owning a NanoVNA and tinySA comes very close to what you want, albeit in separate packages, at total cost of around $100 for both.

- Herb

Isn't someone in the group working on a SA/TG project for the Nano?

On Fri, Aug 7, 2020 at 11:04 AM, Dave Daniel wrote:

Please desist contributing to this thread. It derves no practical purpose and consumes bandwidth that could otherwise be ised for actual development purposes.
=======================================
DaveD,

As a moderator can't you lock a thread once you feel it has served its purpose?

- Herb

On Fri, Aug 7, 2020 at 10:28 AM, Sam Reaves wrote:

Also I am waiting for Gabriel Tenma White's full two port 4 or better inch display 3GHz version for my next one!
=================================
Sam,
Gabriel has estimated her next product release is at least a couple of month's down the road, and I believe that was for a desktop model without a display. Gives you plenty of time to save up your coins.

- Herb

On Thu, Aug 6, 2020 at 07:27 AM, Larry Rothman wrote:

Please reread my msg...my coax is 1m long. It's the PC SW that is not right.

Correction the picutres I sent previously are displaying a start frequency of 0.5, it should be even lower at 0.05.

On Thu, Aug 6, 2020 at 07:27 AM, Larry Rothman wrote:

Please reread my msg...my coax is 1m long. It's the PC SW that is not right.

Larry, yes I have REREAD what you've written. The pictures you sent of the software, showed >>>494m<<<, your stop frequency is way too low to measure a 1m lenght of coaxial cable. Set the frequency sweap on the software from 50kHz to 900MHz, you'll get much more appropriated measurement for the leght of coax you are trying to measure.

Also like OneOfEleven said, be sure also to check you have the proper coaxial velocity set in the software. So yes I did read your comment properly. Try again with that frequency sweap on the software and see how it goes.

As for the second part, your first trace picture dispay of the nanovna shows LOG MAG trace, when you test coaxial lenght, you should setup your nanovna in the enviroment I already describe. Here it is again:

On the nanovna, you should set CH0 trace to LINEAR and clear all other traces, then go to DISPLAY, MORE, TRANSFORM, turn ON LOW PASS IMPULSE and set TRANSFORM ON. Set start frequency at 50kHz and stop frequency at 900MHz, you should get the right lenght on both VNA and software. The lower the stop frequency is, the longer measure you will get. At 900MHz stop, you should see around 4m on the nanovna which fit the lenght of coax you currently have.

If you look closely, the software uses TDR LINEAR which is what you should use also on the nanovna (not LOG MAG). Again, yes I did read your initial comment and took a look at both your picutres.

It works here, it should work on your side too...