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On nanovna-saver/README.md at master · NanoVNA-Saver/nanovna-saver · GitHub <https://github.com/NanoVNA-Saver/nanovna-saver/blob/master/README.md> I have read that the calibration has to be done for

I'll give it a try Thank You

This related to points count, old fw have 101 points and use 256 FFT. Now used 401 points, and 512 FFT Also added amplitude compensation (for 256 FFT need use 256 points, for 101 points all others

I read somewhere that if you use the nanoVNA alone you MUST calibrate on it, whereas if you use it attached to nanoVNA-saver, you MUST calibrate on the computer software.

Well, couldn't edit the other post so I'm adding this one. I think I figured it out, you have to change the sweep points to 101 or 201.

Do I need to do both? I only did the nanovna calibrate

Just wondering, something seems different with the TDR workings in the latest firmware. In the 0.5.0 fw if you set the frequency to 100 MHz you had your max cable length on the right side was close to

Is WHAT related?

"Things can be explained simply and clearly if one chooses to do so . Often times, I find it's best to only use as much complexity as is necessary to sufficiently convey one's thoughts." That's

Karl Jan, My SAA-2N measures about -12dBm at 8MHz CW, but the signal pulses on and off during the sweep. (It is -12dBm during the on times, measured with an HP8563E SA.) I am using the Ojisan version

For swr plot you can use the value of 6:1 each side of center freq. Find those 2 values of freq, find their difference and divide into the center freq to get operating Q. If you double that value,

"the logmag is extremely narrow and touchy to be resonant" Yes, that one. And you should be seeing a pretty decent return loss value.

You will be measuring S11, a one port measurement. Set the display for log magnitude dB. So the sweep should show an excellent return loss at the desired frequency set for the PI MATCH, say 7.1 MHz

That’s a good way to put it Roland. Thanks for the link. -- VE6WGM

Did you calibrate on saver and not just on the NanoVNA?

Simultaneous is probably overkill — particularly because non-linearities would break it — but yes, a single receiver at each port would make sense. There's no shame in mixing, so long as the

Questions I've not even begun to think about... (although, yes, directional arrays are things that I expect to want to do at low UHF within the next 12 months). - Roland 9V1RT

Hi Alan, OK I have been using for traces. a smith chart, and a swr line, and a log mag, Smith is well a smith, the SWR seems broad, where the logmag is extremely narrow and touchy to be resonant with

I'd suggest that although use of the NanoVNA should not be limited to those with engineering degrees, it would be helpful for most beginners to at least understand what the S11 and S21 parameters

I should add, this takes the pi net as a single tuned resonator, that the match at fo is good,say 20 dB return loss and for a lossless network, S11^2+S21^2=1. See how to get Q from a single tuned