开云体育

Neb -
Thanks so much! It works very nicely on my 'old' Windows Vista machine.
That multipurpose chart in the upper right corner is wonderful.
And the program found the right com port right away, too! You're a genius.

Doug
K8RFT

Bonjour Jean,
There have been quite a number of improvements and new functions added to the firmware since the end of September by the main devs: QRP, reald, hugen79 and edy555.?
And, as the wiki and files sections can be updated by almost any forum member and since it is trivial to flash new firmware into the nanoVNA, it would be a great help if another member (you or someone else) could take some time to play with the various releases of firmware and create a feature table.?
Now, with that said, someone could also browse the various GitHub NanoVNA repo's and compile a list of the various enhancements and changes for each Dev's release. I am currently the maintainer of the Console Command doc and that is how I started it - by browsing the source code and creating a document.?
In any case, for anyone reading this - if you have some free time, by all means create a firmware release feature table that can be exported as a PDF and upload it to the files section. If more that one is created, the best of each can always be merged into an all encompassing document.??
Several forum members have already built really good reference sections. If you'd like to help make them even better, contact myself, Oristo, Herb W, David Feldman or just ask in a new general message.?
Cheers,.??Larry

On Mon, 25 Nov 2019 at 4:51 PM, ptapon@...<ptapon@...> wrote: Hello,
we have, with this fantastic device and everyone's contribution,? a great tool for our hobby.
We see quite often a new firmware popping up.
Is there a way to understand how a new firmware will compare with another one. Additional functions, additional commands, features, more precise for a set of frequencies, what have you.
More clearly, witch one to choose when we have a specific usage for the nanovna. What will be the preferred firmware for, say, nanovna saver. What are you going to loose it you use this one instead of this other one.
As an example, we have seen these days 2 firmware proposed. One form Edy555 and one from Hugen79. After reading the readme.md form the 2 releases, I'm still undecided to use one over the other.

Can someone throw some lights?

Anyway thanks to everyone for their contributions.
I'm learning a lot with all of you and this tool is something I had in my dreams.

Jean

Hi Jean -

What will be the preferred firmware for, say, nanovna saver

Rune Broberg is the author of nanovna saver, which
I think uses a minimal subset of nanoVNA commands that work with most firmware,
particularly including originally installed by Hugen, which many never change.

If you login to [email protected] and search for any message by Rune,
one option is to list all of his messages, which can be searched.
If you do, then you will find that many refer to edy555
while few are about hugen and very few are about hugen firmware.

On the other hand, latest hugen firmware inlines some code that edy555 does not,
so may be slightly faster.
I think latest hugen firmware includes accuracy improvements from QRP.

Hello,
we have, with this fantastic device and everyone's contribution, a great tool for our hobby.
We see quite often a new firmware popping up.
Is there a way to understand how a new firmware will compare with another one. Additional functions, additional commands, features, more precise for a set of frequencies, what have you.
More clearly, witch one to choose when we have a specific usage for the nanovna. What will be the preferred firmware for, say, nanovna saver. What are you going to loose it you use this one instead of this other one.
As an example, we have seen these days 2 firmware proposed. One form Edy555 and one from Hugen79. After reading the readme.md form the 2 releases, I'm still undecided to use one over the other.

Can someone throw some lights?

Anyway thanks to everyone for their contributions.
I'm learning a lot with all of you and this tool is something I had in my dreams.

Jean

It doesn't look like hugen has any plans to update his original NanoVNA-Sharp application. Both QRP and neb40gsm@... have done an excellent job of taking hugen's reverse engineered NanoVNA-Sharp application and putting their own stamp on it. Seems the line about standing on the shoulders of others still has merit.

- Herb

The T connector is not accounted for by the calibration.....

Certainly, that can be noted in the Smith plot.

BNC 50 ohm terminators can be very poor.

Agreed; in this case one is a legit cal standard and the other is about 47.5 Ohms and 1.4nH

The T connector is not accounted for by the calibration.....

BNC 50 ohm terminators can be very poor. They are sometimes a 1/8 watt axial lead resistor in the metal extension of the BNC. R varies considerably from one to the next and effective of inductance in the resistor is very noticeable as you increase frequency.

Hi Wolfgang,
i'm glad you like it, the design and solution is Neb's merit - i just tested it and gave an opinion.
I like it too, with clever solutions.

73, Gyula

comes with 'free' shipping too !

cal adapters appear to be collectors item

Strange, I did clearly see a difference on my HW

BNC Tee with terminators at the end of a pigtail is far from ideal...
I suppose that mixer distortion may be inconsistent among samples.

FWIW, when calibrated for smaller ranges, e.g. 200-800MHz
my worse clone shows problems around 240MHz.

HiGyula,
a very nice and useful program!
I hope it will be freeware and open source. It was a good idea to find the minimum SWR automatically.
As an example I tested a DiskCone antenna for receiving purposes.
Best 73's, Wolfgang, DH1AKF

Is if fair to conclude that for your HW there is no difference between 8 mA drive (power 3) and 6 mA drive (power 2)?
Strange, I did clearly see a difference on my HW

--
NanoVNA Wiki: /g/nanovna-users/wiki/home
NanoVNA Files: /g/nanovna-users/files
Erik, PD0EK

If no differences

The rise approaching 900MHz is related to power 2,
not just random noise,
switching power back and forth with saved calibrations.

I suppose there is noise in calibration
( does it employ averaging? )
but switching power from 3 to 2 without switching calibration
always shows some relative rise approaching 900MHz

Here ya go.....


$628 CAD for 1 nanoVNA on Amazon.ca - comes with 'free' shipping too !


On Monday, November 25, 2019, 1:26:07 p.m. GMT-5, Oristo <ormpoa@...> wrote:

> There are so many out there it is hard to make a decision.

Only a few individuals here have experience with more than one nanoVNA,
with most acquired from vendors who may ship different versions at different times.
According to @gabuchan, there are 3 main sources for nanoVNA;
most here credit Hugen as the key designer of assembled devices,
but Hugen continually refines his design and reportedly sells mostly in China.
It seems likely that many devices on Amazon or elsewhere are by resellers of Hugen's devices.
Hugen confirmed that one acquired from NooElec was indeed one of his, but not the latest.
If USB-C direct attachment is important,
then a device with nanovna.com label on the back is a necessary,
but not sufficient (since easily copied) factor.


Meanwhile...

* NooElec is indeed the US supplier designated by edy555,
? who created the original nanoVNA kit and maintains the primary firmware repository.

* Greg W4GAP's linked version IMO is almost certainly a genuine NooElec-blessed-by-edy555 NanoVNA,
? probably by Hugen but, lacking the nanovan.com label on the back, may not be the most current design.

* The one linked by hwalker appears genuine, but vendor Leiyini does not appear to specialize in electronics
? and IMO may be more likely to source items from multiple suppliers.

* Images for the item linked by hamrad88 are of a so-called "worse clone",
? such as I acquired in July and has been satisfactory for my purposes
? but less than ideal above 240MHz or so.

* For someone looking for a recent Hugen version >>only from Amazon<<,
? the AURSINC version is advertised as "UPGRADED", so returnable if not...
?

Can you do a calibration and a measurement of a 25 ohm resistor
after you have fixed the output power to 6mA, so in console mode
power 2
and then the calibration and measurement
and see if this gives any difference in the 25 ohm measurement.

First capture is with 50 Ohm calibration at power 2;
second is then with 50+50 tee and 2dB/div:

There are so many out there it is hard to make a decision.

Only a few individuals here have experience with more than one nanoVNA,
with most acquired from vendors who may ship different versions at different times.
According to @gabuchan, there are 3 main sources for nanoVNA;
most here credit Hugen as the key designer of assembled devices,
but Hugen continually refines his design and reportedly sells mostly in China.
It seems likely that many devices on Amazon or elsewhere are by resellers of Hugen's devices.
Hugen confirmed that one acquired from NooElec was indeed one of his, but not the latest.
If USB-C direct attachment is important,
then a device with nanovna.com label on the back is a necessary,
but not sufficient (since easily copied) factor.


Meanwhile...

* NooElec is indeed the US supplier designated by edy555,
who created the original nanoVNA kit and maintains the primary firmware repository.

* Greg W4GAP's linked version IMO is almost certainly a genuine NooElec-blessed-by-edy555 NanoVNA,
probably by Hugen but, lacking the nanovan.com label on the back, may not be the most current design.

* The one linked by hwalker appears genuine, but vendor Leiyini does not appear to specialize in electronics
and IMO may be more likely to source items from multiple suppliers.

* Images for the item linked by hamrad88 are of a so-called "worse clone",
such as I acquired in July and has been satisfactory for my purposes
but less than ideal above 240MHz or so.

* For someone looking for a recent Hugen version >>only from Amazon<<,
the AURSINC version is advertised as "UPGRADED", so returnable if not...

Oristo,

Can you do a calibration and a measurement of a 25 ohm resistor after you have fixed the output power to 6mA, so
in console mode
power 2
and then the calibration and measurement
and see if this gives any difference in the 25 ohm measurement.
I checked hugen's code and once set the drive strength (power) will remain till the unit resets
If no differences then I retract my comment on non-linearities.

--
NanoVNA Wiki: /g/nanovna-users/wiki/home
NanoVNA Files: /g/nanovna-users/files
Erik, PD0EK

Hi neb,

The program has been tried by others and works well with Windows XP.
Thanks to neb for writing the program.

Ordered this one today..tnx for the recommendation. There are so many out there it is hard to make a decision. Your advice is based on something other than " a good deal". Now I need to learn how to use it.
Jim K2TL

The 4 save locations versus 5 also seems to be an acceptable trade-off for
larger font size

I always want at least 5 calibrations and do not recall using more than 3 traces at a time.