开云体育

Actually, the web app DOES have SWR if you know where to set it up... Press the small + at the lower right corner and select CH0 and then SWR in the next pulldown.? ... Larry On Wed, 30 Oct 2019 at

I have been following this discussion and wondering why the variety of diodes, including Schottky, are used by different folks. And I saw the comment in a post that the firmware assumes a 500 mV drop.

meter cable connected to the reference plane with short and open at its other end, should give perfect circles spiraling inwards in the smith chart. for the reference R, both real and imag) The bridge

the funny thing is that this swap of bytes is not needed. And even if it needed for some reason it will be more easy to do on PC side. But it is works in such way, so we need just to live with that

As I read these comments, I wondered if edy55 was interfacing to a little endian machine, and to make life easier, swapped those bytes in firmware. It's a classic bit of trouble twixt swapped endian

I'm using the nanovna with the PC program to measure swr.? ? On a whim I loaded the Android app to see if it would do the same, but it does not have an swr setting.? ? Does the webapp do swr?? Or

all is intuitive, just edy555 reversed bytes in the pixel on firmware side. This is why data returned from NanoVNA to PC is different than data returned from display to NanoVNA. Just reverse bytes in

Thanks Rune, it works now ... I had not tried to go further and give the command "python3 nanovna-saver.py" now we need a system of self-adaptation to the resolution of the screen, netbook PCs have a

How does scan work? Can it return multiple calibrated CH1 values for a single frequency? By reading code, I now appreciate that 'sample' affects both 'sweep' and 'scanraw' for all traces. Have yet to

I think horizontal line from cable loss. Very good free simulator program: http://harriman.ddns.net/Smith_Charts.html Simulate lossy coax (for example RG-58), now subract with ideal lossless coax.

*VE2PF> "Anyone ever seen a USB controled RF generator?"* https://signalhound.com/product-category/signal-generators/ Vy 73 de Darren G7LWT / AK4DB

I meant 5.11.2, but anyway: Remove the ==5.11.2 from the PyQt5 line :-) -- Rune / 5Q5R

Hi, try just running "python3 nanovna-saver.py" - if you have the prerequisites installed, it will just run. :-) Otherwise, edit setup.py and remove the fix for version 5.11.3 - which is really only

I have one.? I am happy with it, except that the USB connector is only soldered to the circuit board, rather than screwed to something solid.? I read somebody's report that the connector had come

Hi all, I'm installing the Linux version of nanovna-saver on a netbook with a 32-bit Debian 10.1 installed. I have installed all the required packages but when I give the command python3.7 -m pip

Garry Thanks for the feedback. I tested also with a better semi rigid cable. The model finds a somewhat different R, I guess the cable has a bit different impedance but the imaginary part is the same.

To analyze possible confounding factors, modify: main.c cmd_vbat() - chprintf(chp, "%d mV\r\n", vbat); +/* needs adc_stop(ADC1); ?? */ +chprintf(chp, "%d %d\r\n", adc_vbat_read(ADC1),

No, this is TRACE 2 baseline marker :)

Hi Erik; I think your assumptions are incorrect. To achieve what you are attempting requires your test cable be free of imperfections. In truth, the cable is not likely precisely a constant Z0 equal

Kurt suggested that very good cable is wanted, e.g. airline. I notice better results from LMR-400 than RG58 or RG316