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Rune, The popularity of NanoVNA Saver continues to grow. I just saw this over on the NanoVNA-F user group. "We are currently modifying nanovna-saver (a good NanoVNA PC software) to fit NanoVNA-F, so

21 : The Mathematica Code and the Unpacked DERDEI Code @Jose Luu : /g/nanovna-users/message/3278 Hello, Thank you very much for your kind interest in our work ! We much appreciate

Thanks for the info Warren, 73 de VU2PGB VEEN

An update on dynamic range. In the photo the upper unit is the unshielded "worse" version and the bottom is the latest, best, shielded version. Both are calibrated for the 600 - 900 MHz range, Logmag,

is this modified software available to other users? Gyula

All, Thanks for the excellent information - so it does sound like step attenuator leakage is the culprit....which is not at all surprising given that it is a very cheap one ($40) that I purchased on

For those interested in the spectrum of the Si5351A here is a series of pictures, using my RFzero, at 267 MHz (i.e. 800 MHz "NanoVNA version"), 280 MHz, 298 MHz and 299 MHz. The pictures clearly show

@Larry, Brian, DMR In the meantime I have replaced the IP5303. Also the 10?F cap. But there is no improvement. The Nano still won't start on its battery. The battery can be charged normally. I have

No battery needed for saving calibration data, It is stored in flash memory

@ warren Your nanovna is ver 3.1 printed on pcb with shields for three sections. Is it the latest PCB Version. Is internal battery necessary for saving Calibration data. 73 de VU2PGB VEEN

Bruce What you are seeing is leakage through your attenuator. Attenuators intended for HF work and below, especially those with a network of mechanical switches and resistors, often display this

I just did the experiment here with my hp 355D 100 dB attenuator/ 10 dB steps. Attenuation is spot on and the VNA follows it just fine all the way down to 80 dB. No surprises at HF. If you have a COM

Hi Bruce. Interesting. Well, I have measured HF filters whose center frequency is less than 30 MHz and readily saw skirt responses that were 80 dB below the pass band response. Now I made sure I took

Hello yin&pez, The software documentation mentions that there was a Mathematica version of the software tools, even though the Matematica version may not be uptodate, I am better at reading

I have a step attenuator with a series of switches (1-20 dB assorted values) that can be combined for (in theory) up to 80 dB total attenuation. Measuring the S21 individually, the 1,2,3,6,10,and 20dB

Reginald could you please explain what means this equation? What means "d" and "a" variables? It seems that "f" is frequency and "t" is time, but I'm not sure what frequency and time exactly? If "f"

leave cable in place for two decades and more. It should be changed out regularly, of course. course, for irregularities but also to measure the length physically and then relate that result to what

Neat antenna response with the double frequency match. They did a nice job. Would be interesting to see how the radiation efficiency holds up. Alan

20 : Measurements with Core Uncertainty Hello, Allow us, please, to inform you that in the course of preparation for the final comparison between VNA and NanoVNA, which we planned to base it on

Testing a U/V Baofeng HT antenna with my modified nanoVNA software.