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Or a UHF to SMA adapter (the 1/2" isn't important) and use your existing SMA cal standards.

You can flash the Nano with an ST-Link interface. I bought one for $3 from Aliexpress - works great: https://www.aliexpress.com/item/1005001638056242.html Also avail on Amazon. I had a similar issue

Get a set of female SO-238 Short, Open, Load calibration ends, and calibrate at the end of the coax which will attach to the antenna. 73, Ken N8KH

No luck with a new USB cable, still showing up as "Unknown USB Device (Device Descriptor Request Failed" in device manager. I'm wondering if the firmware can be flashed via serial somehow? I think I

Thanks, I will try a new USB cable and the Zadig app. I am mostly positive the correct drivers are installed, so maybe forcing the new drivers will help.

On 3/4/22 7:43 AM, Miro, N9LR via groups.io wrote: > In HAM world, one of key uses for nano is antenna tuning, or at least better understanding what my TX is going to see. > > Very rarely we get a

In HAM world, one of key uses for nano is antenna tuning, or at least better understanding what my TX is going to see. Very rarely we get a luxury to connect nano directly to antenna feed point over

First off, Thanks to all that responded. Further checking on #2 VNA gives the same results; Smith Chart showing a solid 50 Ohm load with No Inputs/Cables connected to S11, on HF / VHF / UHF

Hi Ron, Thank you for the tip. Someone also suggested same as you said. But there are few other things and until I do not go through them its not going to show the graph properly. I tried changing the

Hi Nick, Thank you for your reply. I already gone through that user guide that you are referring to. As you see I mentioned in my post above but obviously missing some important steps. I got some

A dead receiver on CH0 would show good load, and bad open/short, because in the load case, there's no reflected power.

One thing to try before concluding that a unit is bad would be to reflash the firmware, in case something has gotten corrupted and to be sure you are running current code; this is important in these

200 Georges for that Keysight SMA torque wrench ICYAI more than the VNA

Odds are good that you either have a problem with the s11 SMA connector on the second #2 NanoVNA, or that your open and short calibration hats are dirty or somewhat defective. Try at a few different

The reflection coefficient is the voltage "reflected" back from the unit under test (it's voltage, not power, but it's similar to Ref/Fwd on a directional watt meter) - shorts and opens are "perfect

Sorry Jim, I forgot to Thank You for your suggestion.? I never thought to verify the OSL on the Smith Chart like I did the first time I went through the Calibration procedure with the first NanoVNA-H

Ok, "reflection coefficient" on the Smith Chart?? Bingo!! VNA #2 on the Smith Chart I see a 50 ohm load on Open, Short and of course Load.? Calibrated or not. It's Broke? George

I'm sorry, I don't understand "reflection coefficient". I did now Reset Calibration and looked at the LogMag results if that what you were asking: #1 VNA O= -3db? S- -1db? L= -40db #2 VNA O= -86db?

what readings do you get for all three terminations *without calibration*? - the NanoVNA isn't perfect, but you should get close to 1, 0, and -1 for the reflection coefficient. And between two units,

Yup, I agree... "Something's wrong here, this looks like you're measuring your load." Nope... "Something's wrong here, did you measure your load by accident? " "I'd go back and check the load and