开云体育

Hi Martin,

Will this firmware also work for NanoVNA -H 4 ?

No! Firmware for NanoVNA-H and NanoVNA-H4 is NOT interchangeable.
This was already clearly stated in the 2nd post within this thread.

However you can find the Hugen firmware for the NanoVNA-H4 if you follow the same github link:
Pay attention to the name of the firmware files. Firmware for the NanoVNA-H4 always has H4 in the filename.

There is also the DiSlord firmware for the NanoVNA-H4 that you can find in the Files section: /g/nanovna-users/files/Dislord%27s%20Nanovna%20-H%20Firmware (The rar-format archives contain two firmware files. One for the NanoVNA-H and another one for the NanoVNA-H4.)
DiSlord appears to be the most active firmware developer for the NanoVNA-H and NanoVNA-H4.

73,
Thomas

On Fri, Mar 5, 2021 at 01:45 PM, Martin Glazer wrote:

Hi

Will this firmware also work for NanoVNA -H 4 ?

You can see that he has -H and -H4 firmware at the link I posted. Make sure you use the right one for your device. The latest -H4 is 1.0.45 and it works nicely with the OneOfEleven NanoVNAapp which has more features than Saver. Search this group if you are interested in the OneOfEleven NanoVNAapp.

Roger

Jim,

Here is a link to the first page of the eevblog discussion on transfer relays. Starts halfway down. Joe carries on and the subject is talked about intermittently in the next 4 or 5 pages. He does have some comments on lower price Omron RF relays and Mini-circuit devices. All interesting stuff....



Roger

Many of the small DIP relays that operate on TTL levels are acceptable to
at least 1 GHz. I've not tested them beyond that. I'll bet embedding them
in some creative circuitry could find a solution for these to a bit higher
in frequency. And they are not expensive. Of course, isolation may,
then, become a problem.

Dave - W?LEV

--
*Dave - W?LEV*
*Just Let Darwin Work*

On Fri, Mar 5, 2021 at 09:10 AM, Carl Franck wrote:

Dear Group, I'm trying to export the displayed data with nanoVNAsaver, but
what I'm looking at as a text files (using the export to touchstone) is not
what I'm seeing in the display. I'm deeply obliged for any advice, Sincerely,

When you file export from NanoVNA Saver you do not get the display graph data.. It is a "touchstone" format file that only gives the S11 (.s1p) and S21 (.s2p) coefficients in complex real + imaginary form. You can import it back into Saver or another program like NanoVNA# to plot the graphs if you need to.

The only way to save the graphs is to right click and save them as a jpeg graphics file.

If you want to get the data vs frequency for parameters like SWR, impedance, return loss etc. you have to import into a spreadsheet and do the calculations yourself. There may be some other program that can import touchstone files and export them as other types of data files but I am not aware of any.

Roger

Roger

On 3/5/21 1:33 PM, Roger Need via groups.io wrote:

On Fri, Mar 5, 2021 at 01:23 PM, Jim Lux wrote:

People have been asking about a single box that can do all 4
measurements, rather than just the two (S11, S21) .

I think that in the $50 price class, one might want to think about an
add on module with the required relays (or RF switches) (i.e. a test set)

If you were clever, you could have an app that drives the relay box and
the NanoVNA to do all the required calibration measurements (SOLT)and do
the calibration math - rather than trying to do it in the limited
capacity of the NanoVNA.

Joeqsmith built one of these changeover units and discussed it on Eevblog. As I recall it took a fair bit of engineering to get it working over a reasonable frequency range.

Easy, but expensive, if you use RF relays. (basically a single "baseball"? or "reversing" switch). The relays just have to good isolation, you don't care about "flatness" because that comes out in the cal.

Something like this transfer switch from Fairview would do (at the cool price of $3k, but stuff like this is commonly available surplus)



70 dB isolation up to 6GHz,

I'm sure you could do reasonably well with more inexpensive relays.


Hard, but cheaper parts, if you want to use MMIC RF switches. Minicircuits DPDT switches are only 30 dB isolation, so you'd want to stack switches.? You can calibrate out some amount of leakage, but if you're measuring a high gain amp, you don't want it to oscillate.

Hi

Will this firmware also work for NanoVNA -H 4 ?

thank you

Martin

N6QLH

On Fri, Mar 5, 2021, 1:38 PM Roger Need via groups.io <sailtamarack=
[email protected]> wrote:

On Fri, Mar 5, 2021 at 10:35 AM, <mjhaviland1@...> wrote:

Does anybody know where to get the original firmware for this. I have

seemed

to have misplaced it .

That is a NanoVNA-H. You can download the firmware at this link. Look
under "assets" for the dfu file.



Roger

On Fri, Mar 5, 2021 at 10:35 AM, <mjhaviland1@...> wrote:

Does anybody know where to get the original firmware for this. I have seemed
to have misplaced it .

That is a NanoVNA-H. You can download the firmware at this link. Look under "assets" for the dfu file.



Roger

On Fri, Mar 5, 2021 at 01:23 PM, Jim Lux wrote:

People have been asking about a single box that can do all 4
measurements, rather than just the two (S11, S21) .

I think that in the $50 price class, one might want to think about an
add on module with the required relays (or RF switches) (i.e. a test set)

If you were clever, you could have an app that drives the relay box and
the NanoVNA to do all the required calibration measurements (SOLT)and do
the calibration math - rather than trying to do it in the limited
capacity of the NanoVNA.

Joeqsmith built one of these changeover units and discussed it on Eevblog. As I recall it took a fair bit of engineering to get it working over a reasonable frequency range.

Roger

People have been asking about a single box that can do all 4 measurements, rather than just the two (S11, S21) .


I think that in the $50 price class, one might want to think about an add on module with the required relays (or RF switches) (i.e. a test set)

If you were clever, you could have an app that drives the relay box and the NanoVNA to do all the required calibration measurements (SOLT)and do the calibration math - rather than trying to do it in the limited capacity of the NanoVNA.

On 3/5/21 9:40 AM, aleks07111971@... wrote:

Kroks (RU)

Are those F connectors?

Does anybody know where to get the original firmware for this. I have seemed to have misplaced it .

Send me a private email.

Don,
is too strange: we have the same version, 4.2 an same firmware. I taked some photo...Is also possible that exists two version of firmware with little differences with the same name.
Anyway f I have installed an SD card, 32GB in the existing internal socket of the NanoVNA, but I don't think that makes a difference.
Tony, I0RKV

Kroks (RU)

For nanorfe design try asking in the official V2 list,
higher chance of getting a response.

Hugen produced 2 port VNA (based on this design
)
should be out soon (a couple of people already got the prototypes for
testing).

Dear Group, I'm trying to export the displayed data with nanoVNAsaver, but what I'm looking at as a text files (using the export to touchstone) is not what I'm seeing in the display. I'm deeply obliged for any advice, Sincerely, Carl in Ithaca NY USA

It is also very important to avoid connecting charged cables to ANY instrument; antenna cables can be particularly problematic in this regard, especially in dry windy weather. Always discharge them before connection. Shorting the inner conductor to the shield should suffice. 73, Don N2VGU

If you store those devices in plastic cases please make sure you have some kind of protection on the input connectors. I use small 50 ohm loads but any dissipating or shielding material can be used. You don't want them to slide around and acquire enough static charge to kill the inputs.

John

Hello Gabriel,

do you have new information regarding full two ports VNA project status?

BR

Predrag, 9A3QV