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switched cables still cant find device running win 10 64 bit

Hi Hernan
One more comment, Save the settings under 1 to 4 after calibration then these trace setting are memorized for later use
Recall 0 to get back to default trace setting
Kind regards
Kurt

-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af Hernán Freschi
Sendt: 14. april 2020 19:39
Til: [email protected]
Emne: [nanovna-users] Display impedance as X + Yj?

How can I display the complex impedance of my antenna with NanoVNA? I'm using NanoVNA-H firmware on HW rev 3.2

In the display I can see something like X ohms + Y farads/henries. If I use NanoVNA-saver I can see this format when doing a sweep.
I need to climb to my roof and make a few measurements today, so I'd like to avoid taking a laptop up there.

Thanks

Hi Hernan
If not too late (you may have already been climbing to the roof) you select e.g. trace 1 then got to format/more and select Resistance. Then enable e.g trace 2 and got to format/more and select Reactance. The toy have the complex impedance. You might need to scale the trace 1 and 2 undr Scal/Scale/Div
Kind regards
Kurt

-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af Hernán Freschi
Sendt: 14. april 2020 19:39
Til: [email protected]
Emne: [nanovna-users] Display impedance as X + Yj?

How can I display the complex impedance of my antenna with NanoVNA? I'm using NanoVNA-H firmware on HW rev 3.2

In the display I can see something like X ohms + Y farads/henries. If I use NanoVNA-saver I can see this format when doing a sweep.
I need to climb to my roof and make a few measurements today, so I'd like to avoid taking a laptop up there.

Thanks

I just checked win7 error reports and found that the
problem exists in the module

libstdc++6.dll

BTW, got the same problem under win10.

Hope it helps

Regards
Peter

Hi all,
I just practiced NanoVNA-QT program under Win7 and
also Linux. The program works fine until I tried to load a
.CAL file just generated after calibration.

Its not possible to load any .CAL file.

If this is tried under Linux the program closed without
any error message.

Similar under Windows but there I got this error
message:

Microsoft Visual C++ Runtime Library:
"This application has requested the Runtime to terminate it
in an unusable way. Please contact the applications support team
etc.....etc."

Anybody any idea?

Regards
Peter

On Tue, Apr 14, 2020 at 02:16 PM, David Eckhardt wrote:

I have the original NANOVNA (small display), the -F, and the -H4. All came with a USB cable that functioned only to charge the units. None of the three cables functioned to connect to a PC. The data contacts were not present in the connectors nor were the data wires present in the cables.
===================
Well David,
I have all three units plus the S-A-A-2 and while one cable was a little flaky, none were missing the data pin contacts. I'd say you have been extraordinarily unlucky in that respect.

Still, it is a good troubleshooting procedure to eliminate a defective USB cable as a first step.

- Herb

I have the original NANOVNA (small display), the -F, and the -H4. All came
with a USB cable that functioned only to charge the units. None of the
three cables functioned to connect to a PC. The data contacts were not
present in the connectors nor were the data wires present in the cables.
So, evidently, its mix and match......

Dave - W?LEV

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

On Tue, Apr 14, 2020 at 12:52 PM, David Eckhardt wrote:

Don't use the USB cable that came with the unit for testing. It's only for charging.
======================================
David,
Each of the 12 members of my ham radio club, plus myself, received USB cables with our NanoVNA's and they all work fine for data transfer and charging. So I wouldn't generalize about all the USB cables shipped with the NanoVNA. I do agree that Paul may have received a defective USB cable and his first troubleshooting step should be to substitute a known working cable.

After that he needs to provide more info, because Linux and Windows 10 typically will detect the NanoVNA without requiring manual driver installation, but Windows XP and 7 need the serial port driver to be user installed.

- Herb

On Tue, Apr 14, 2020 at 01:20 PM, <erik@...> wrote:

Or to remove the frequency table from the stored data as this can be
recalculated?

This, single data from freq table need in marker operation

On all others cases need from 0 to N points step like on generation

You mean changing the memory map to give more space to calibration data and less to code?
Or to remove the frequency table from the stored data as this can be recalculated?
Or check if the isolation correction contains only noise so it can be removed?
Or something else?
--
NanoVNA Wiki: /g/nanovna-users/wiki/home
NanoVNA Files: /g/nanovna-users/files
Erik, PD0EK

Don't use the USB cable that came with the unit for testing. It's only for
charging. Use a real USB cable and it will likely work fine.

Dave - W?LEV

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

Hooked up to usb try to connect but tells me device not found . Any help would be appreciated

Hi everyone!

I was checking Jim's video () on how to align radios (both the LO span and FI output) using a RTL-SDR usb dongle.On the video, he uses an EICO frequency generator.

I was wondering the if a Nano-VNA could act as the frequency generator for alignment of AM and FM that tipically use 455KHz and 10.7MHz intermediate frequencies. Would Nano-VNA have the hardware and firmware needed for this task (adjustable output level, generate AM and FM signals)?

if I recall correctly from other forums I visited, only the AM signal is really necessary for aligning AM radios, and an approximation could be generated with two carriers a few hundred hertz apart; the FM FI and detector seems accept CW for its calibration..

Comments and ideas are very wecome!

One slot for calibration requires a lot of space. 5 tables of 101 points for 2 channels of 4 bytes each value + another table for frequencies of 101 points and 4 bytes each (and round off at 0x800 border due to the peculiarities of rewriting flash processor) 4040 + 404 + a couple of bytes of additional information
Total one slot for calibration takes 0x00001800 (or 6 kilobytes, 5 tables + 2 kilobytes config = 32 kilobytes there is a slot for settings)

If you exclude the table for frequencies (they can be calc if necessary, but more difficult), then you can fit in the size 0x1000 (4096) and this will make it possible to store 7 calibration tables. But it is necessary to significantly change the code

Excluding the frequency table was the first thought for expanding the memory size, but I managed to solve it by optimizing the code now for the code about 24 kilobytes of memory are still free (you can add 2-3 more slots, but it’s easier to optimize the configuration structure itself and throw out the frequencies).

Who can implements that?

Thank you and the other folks for responding to my query. As your question suggests, I have a very low level of technical background, and I would need to do my homework to learn how to interpret the results displayed on my NanoVNA in this context -- just as i did when first using it to measure antenna SWR, etc. But with the guidance above, including yours, I am more than willing to look for the information, both online and from ham elmers I know who have amazing reservoirs of knowledge and willingness to teach. Of course it would be a lot easier to simply buy a toroid, but I like the idea of exercising this (quite aged) grey cells.
Alex

Made this


Test touch screen (use config->touch test), if bad work, calibrate it (config->touch cal) and save (config->save)

Smith chart display ought to do it.
Bob

Update - after trying both the stylus (which works fine when I calibrated
the screen) and the rotary/selector knob I discovered that I have to use
both (one at a time) for each selection.

Doesn't seem like this is normal behavior. Is there a reset or fix?

Thank you,

Tad Danley, K3TD

Trying to set the calibration frequency range on my new nanoVNA H4 v4.2 for
3.5 - 4 MHz

* Set start and stop frequencies using rocker switch and selector -
the stylus wouldn't select anything but the first digit of the frequency and
touching anything else doesn't do anything - finally figured out how to use
the rocker switch
* Now from the main screen all I see when I use the stylus to bring up
the settings on the right are Start, Stop, Center, Span, CW freq, Pause
Sweep and Back
* Back doesn't do anything,

Left with powering the device off and back on via power switch. Doing so
sets the frequency range back to 50 kHz - 900 MHz



Is there some type of reset that needs to be performed before I can begin?



Thank you!



Tad Danley, K3TD

How can I display the complex impedance of my antenna with NanoVNA? I'm
using NanoVNA-H firmware on HW rev 3.2

In the display I can see something like X ohms + Y farads/henries. If I
use NanoVNA-saver I can see this format when doing a sweep.
I need to climb to my roof and make a few measurements today, so I'd like
to avoid taking a laptop up there.

Thanks