AURSINC NanoVNA SAA-V2 Vector Network Analyzer 50KHz -3GHz HF VHF UHF Antenna Analyzer Measuring S Parameters, Voltage Standing Wave Ratio, Phase, Delay, Smith Chart with 1950mAh

All I can say about this NanoVNA is that it is a wonderful piece of equipment at a fantastic price. So far, I have calibrated it and used it to tune the antenna I use to monitor the tower at the local airport. The biggest gripe I have is that I could use detailed instructions on charging the battery. I read a little and guessed the rest. It got to the point where it would power itself down a few seconds after I switched it on. When I plugged it in to the computer USB port on a whim, it worked fine. It was then I suspected a battery problem (it was completely discharged). Plugged into my phone charger, the red LED on the right in the photo is blinking. When fully charged, the blinking LED goes solid for a total of four solid lit LEDs. My screen does not indicate battery status.

I had bought this for the case, but had worries that I would get one of the clones that skipped steps and gave poor results. I recently had a chance to compare against the designers own version (from tindie, but with no battery or case) and the results matched very closely. I was previously using RF Explorer setup with an external bridge and this gives better results with far simpler setup. Not only have I been able to test my antennas, but I was able to setup a simple ERP setup as well.One issue I had is that the battery meter was out to lunch on mine initially. It would read 4 bars then one then when I set it to charge on my USB it would sit forever with only one blinking light. Turns out the current drain when charging the large battery was more than the computer USB could deliver. Once I was able to hook it up to a separate charger and monitor it I found the high current (700mA) and was able to fully charge it.The case is nice but the edges where the metal is folded are very sharp. They didn't bother to grind the sharp edge from where the metal was stamped and it is sharp enough to cut into the lining of the case. I had to cover the edges with blue painters tape to keep it from destroying the case.More annoying is that my unit crashes if I try to sample the full 201 points. This has happened repeatedly, so it is not a fluke, but I have never had problems with 101 points, so I live with it. The software will let you do 1000 if you need more accurate calibration and have a laptop handy.

This new(ish) design expands the coverage of the NanoVNA to 3 GHz, which means that you can now analyze antennas in the popular 2.4-2.5 GHz band. With an adapter to RP-SMA, you can even test Wi-Fi antennas. The only thing to keep in mind is that this version does not keep its calibration stored and needs to be recalibrated for each frequency range that you test. So I recommend either getting in the habit of calibrating each time you use it, or saving the calibrations for the bands you plan to use in the save spots and writing them down so you don’t get them mixed up. But other than having to keep calibration in mind, this little piece of kit is awesome for any RF hobbyist or ham operator.

This works well at lower frequencies. At higher frequencies the accuracy is lower

It’s a great little tool.Limited features, but it does what I needed at a great price/performance ratio!

I used this twice. Really impressed with the functionality, but the third time I went to use it it won't turn on. LEDs flash for a second and that is it. Tried charging it, running it from the computer, no luck. I hope I am not too late for a return.

I started using expensive lab-grade VNAs about 10 years ago, and man I wish I had this back then because it would have saved me so much time.The expensive calibrated rack mount VNAs are absolutely more accurate, but 95% of the time you just need a quick visual & ballpark impedance & frequency values. This thing is tiny, battery powered, and super useful as a USB VNA since you can take screenshots and save calibrations using the (pretty primitive, but usable) vna_qt software.

I missed the fact that it doesn't have an enclosure so I had to print one. Also this one is a bit noisy. After calibration if I install the 50Ω load the point on the smith chart wanders about a little. But for the cost, I can't complain.