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When I am testing amplifiers, using one of my network analyzers, I normally start at -30 dBm output from the signal source, into the device under test. You don't to come anywhere close to saturation,

Tks for mentioning that Dave. I forgot to add that besides the amplifier gain and max input, the 1 dB compression point should be taken into account when determining the system budget.

Whilst his methods of making open short and loads is not had, his verification procedure looks seriously flawed to me. Unless I am mistaken, he performs a calibration using his standards, then

Whilst an LNA can probably take 0 dBm without damage, it would be driven well beyond its linear region. I just took as quick example, one of the Minicircuit amplifiers I have here

Kurt, After your comment about not being impressed with the HP 50 ohm loads, I checked their return loss from 50k-900MHz and you are correct that their high frequency return loss is not impressive. At

All my low noise RF preamps have a maximum input of 0 dbm and can handle the maximum output power of the nanoVNA without an attenuator. You have to know what your system budget is and choose your

wrote: From all four S-parameters it is possible to work out the Rollett Stability Factor K https://www.microwaves101.com/encyclopedias/stability-factor which will allow you to determine if the

Yeah, sorry about the window link, I was half asleep at the time. DMR has mentioned a Linux how-to in this thread. /g/nanovna-users/topic/33072199#1507 I think it's about the 4th post

If you are modifying the FW *please* maintain a file in the Firmware folder with release notes and version information along with the location of the source repository. If you make comments such as

Aha. That's what are for. It works now, Thank you.

Today I received my third Nanovna. This one, I believe, is one of the "better" quality, completing the triad of better, worse, worst. The construction is noticeably higher quality with full, soldered

Hi, check for the "Smith.png" and "Admittance.png" file. They should be in the same direcory as the "NanoVNA.exe" File. 73 Harald OE3HBS

The NanoVna seems to work but when I look at results on the PC screen I can't see the Smith chart. I see results plotted on the screen, probably on the Smith chart but Smith chart itself is not

Ok Larry, its a starting point that I never knew about. I've not investigated anything to do with the terminal stuff yet. 73 de Andy

Greetings Mr. QRP, Thanks for the analysis! Gosh it is amazing how close my DIY 50 Ohm BNC load with adapter combination match the SMA 50 Ohm reference load that came with my nanoVNA! I don't know how

Interesting!!

6 dB is too small, the output level may be very high for LNA and may overload it, so you may get incorrect measurement. I'm using 30-60 dB attenuator on the LNA input for measurement.

Thanks. Just what I wanted.

Hi Nick, please try putting the full path to the file in the field, not just the file name. It may be a matter of which folder the software sees as its working folder (generally controlled by your

I agree and was going to put forth the same request as Rudi just did: Due to an ever-increasing number of NanoVNA firmware developers providing binaries on this forum (I think it's up to 5 now) and