开云体育

FYI I have started a thread on EEVblog under this subject line. This is serious math wonk territory, so I don't want to clutter an already very busy list with it. Have Fun! Reg

Make sure you're measure correct channel. You should see CH1 (not CH0) near blue LOGMAG text with value at the top of screen.

Could you be kinder? I just joined this system (which I don't know). I don't speak English very well and this is already difficult for me. If someone can put some links with useful information ...

RL = -20 * log10( abs(gamma) ) where gamma is a complex reflection coefficient In order to get negative RL, we needs abs(gamma) > 1, it means that reflected wave is higher than incident wave.

Thanks. I did all that, still no S21. I think it's blown up. There is also an incompatibility between the firmware files I found and the SGMicro bootloader pgm. It was listed as "new out of box" and

I just went through a calibration and save and it seems to be working correctly this morning.? Time will tell. I almost ordered another unit.? Apparently the prices have dropped significantly. Bob

Bob, If you are using the original firmware that came on your nanoVNA then the symptoms haven't been reported by other members and you may have a hardware problem. If you have upgraded your firmware

AFAIK, only the dev tree exists - there is no APK app that I can find. It would be nice if cho45 could convert his webpage to a standalone html file that anyone could run locally. NanoVNA-Web-Client

Ken, The 2-trace, unshielded ports, black unit is usually delivered uncalibrated and is not useable out of the box. The following usually gets it going: First select "RESET" under the "CAL" menu and

Yes blue trace responds properly.

I did what you suggested. Nothing change the CH1 display of noise. Bad unit, I guess. The seller does not respond. Thanks for your input.

Make sure you're selected channel CH0 for SWR. It cannot measure SWR on channel CH1

You've been instructed to read the User Guide several times.It's in the files section - dated Oct 2nd.There is also a DfuSe document on hugen's google drive page - look for it. Please use the WIKI and

I saw the comment regarding soldering of the connectors and checked mine, which look good.? I don't think the problem is mechanical, as I have tried gentle tapping and warping without effect.?

I had found it. I had asked other questions. Can you answer me? Thanks

Hi all, why blame someone for complaining controversial RL signs !? Keep cool, please. Yes, Return Loss has been an issue and some use it in a wrong way. This caused Trevor S. Bird, former IEEE chief

Probably someone tried to measure amplifier with this nanovna and it's CH1 input is burned out. Another possible root of cause - incorrect channel setting for trace. In order to check, do the

NanoVNA-Web-Client includes some Android app source. It is being actively developed, with automated build tools and even unit tests: https://github.com/cho45/NanoVNA-Web-Client/tree/master/android Has

Thanks - add it to the console command doc. ...Larry

Dry solder joint maybe? Saw some people had issues with the SMA-connectors not soldered properly [email protected]> wrote: