First I would like to apologize using this forum for what it was not intended. I have searched the internet and not found the answer to the following. Does anyone know if the Medical Device Dexcom mod

I'm assuming only one cable required from NanoVNA (Port-1 / S11 ) over to the plate choke under test ? The pair of 6" cables that came with the new VNA-H4 have male SMA's on each end. The 'plan' was t

I have been trying to measure the impedances of wound ferrite rods in the lower kHz range with my NanoVNA H4. I am measuring at several frequencies in the form R + jXL. The ferrite rods are wound with

Warning - Total VNA beginner here -------------------------------------------------- I went a little VNA'wire , and ended up with 3 VNA's , all includig a Cal-kit. And now i found a SDR-Kits Cal-kit i

I got a nanoVNA H4 that goes 10kHz to 1.5Ghz. I noticed that it freezes the drawing after a few seconds after startup. The UI is fast and has good respond. The thing is that it just stops refresh the

I read on @Twitter last night there was a new TinySA with a range just past 5GHz, covering some Wi-Fi, and a 4 inch display for $140. https://www.ebay.com/itm/tinySA-ULTRA-100k-5-3GHz-Hand-held-tiny-S

Hello. I have an open source Nano VNA, white face, that has been in it's box since before Covid. The battery will not take a charge (using an Apple iPad charger/cable) nor will the unit turn on when p

Frequency-domain reflectometry (FDR) has a number of advantages over time-domain reflectometry (TDR), including enabling the detection of many more types of damage to coax than just open/short termina

Here's the shots as promised. Yes, it (Ultra) works past 10GHz. Mike C. Sand Mtn GA

I asked Google Bard about the NanoVNA. Here's its response. Brian

I have a NanoVNA-H4. I followed the H4 video for creating a swr measurement profile (my term). After completion of the steps, I successfully did a swr sweep of a uhf antenna. I shut down the unit and

I have two short cables with alligator clips that I use for looking at baluns, transformers wound on toroids, tuned circuits and what not. When calibrating should i just tune the the s11 side or shoul

Hi, I just downloaded and installed nanoVNASaver 0.5.4 and installed it on 2 different W10 machines. The nanovna is connected to a com port and the program shows the com port with the letter (H) besid

Well guys, it appears that my Nano VNA H4 has permanently died. There is a screen display but no evidence of any signal or sweep happening. It did this once before a few weeks ago, and I fixed it by r

There is a nice review/write up and suggestions for future development of the low cost vna. This paper appears in the IEEE Microwave Magazine for this month of April, 2023. An excerpt here attached. A

My nanoVNA is a V2Plus4. Savers sees it as NanoVNA-V2, with a FW version 1.0.2 This USED to work just fine. Windows update? nanoVNA setting? Connect to nanoVNA Setup the Sweep Parameters with a single

I have a NanoVNA-H which has developed a behaviour I've not seen described elsewhere - all screenshot attempts give a "Fail write" error, but other write operations are OK. I'd been through multiple S

I was meaning to update firmware on my TinySA. Thought I had TinySA plugged in, when it was actually the NanoVNA. The firmware update did work, but not sure I have two working TinySA's...lol. I shutdo

Stan, here is what happens when I create the swr profile, take a reading, power down then power back up. I have also included a shot of my version. 73, Bob, KN4HH

Hello I succeeded in establishing the formulas to pass from the parameter S11 (a+jb) to the true impedance (not reduced) Z=A+jB I would like to find the gain (linear, not in dB) from the S21 parameter