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Georges, Are you sure you are trying to load the correct firmware file for the H4? If you try to load the 'H' file or a 'V2' file, it will give a black screen. And where did you get the 1.2.27 file?

Hi, I have been busy a few hours to try to upgrade firmware of my NanoVNA H4 to 1.2.27. Tried STMCube progammer 2.9.0, which usually is fine, with the correct 1.2.27 bin file, and get a black screen.

Hi Jim, The issue is not of a "mismatch" as you describe, but, rather of the correct (rated) load the QCX apparatus has to see to work as expected. If we take your example of a DC power supply, for a

Use a TinySA Ultra to view the spectrum at the LNA output would be a start. For an antenna receiving both the 1.2 and 1.5 GHz signals you might try:

Would the right approach be to use Port 0 (the source) on the VNA to drive a broadband probe (non trivial) and use Port 1 to measure the response of the antenna/LNA combination. ?You can calibrate

Dunno how to separate the LNA, unless there's a tiny coax connector behind it somewhere that you can jack into. I've seen some tiny coax connectors that were apparently there for testing purposes (or

Hi George, Look up "Bias Tee Power Injectors" on Amazon.Lots of them at $15 or so with stated bandwidth to 6GHz. -----------------------------------------From: "George" To: [email protected] Cc:

Those look really good. The ZABT-2R15G+is on the expensive side but is available from Mini-Circuits in quantities of one. The TCBT-6G+ and TCBT-14+are less expensive but are only available from

Take a look at a RF/DC bias tee https://www.minicircuits.com/products/BiasTees_tab3.html?srsltid=AfmBOoocSGeXYDFhK0Qnzs3pAgRya-CUm_JwkooYFMf0X4PLjYGEpbqL

You are going to find few GPS antennas that pick up both L1 and L2.The classic patch antenna does not have anywhere near the necessary bandwidth.Most of the antennas that do both really have 2 patch

You would have to buy or make a bias tee that works on that bandwidth. I made one using stripline on a piece of G-10 pc board material. It was designed for 1296 MHz. I don't know how well it will

I am building a high accuracy RTK locating system to measure my property lines and the location of buildings on the property. To achieve centimeter accuracy, it uses signals from multiple locating

Rick, No, I'm not resistant to facts. But I have experience with more than Linux OS's over the last 50+ years and have seen what I have described. But you seem to not be able to understand plain

Works on my Nokia C-110 w/ Android 12.

This is where HP went astray in the early 80s with their manuals.

I don't think anyone asked for "dumbed down", just, perhaps, a few shortcuts to setup routine tasks, leaving the rest as is.

Once one learns how to use and understand the measurements any VNA can make, there will be no need for a "simplified" (dumbed down) menu structure. ADVICE: Go buy yourself a RigExpert unit which is a

It comes down to the strategy in the UI design . . . task centric versus item centric. Task centric would be a top menu that gives a setup/submenu for key/"most used" tasks (as the OP is suggesting),

Some people need one simple functionality from NanoVNA, others need another simple one, and so on. And what to do with many simple functions for each? NanoVNA interface is quite simple, and it is

Just a thought - there are several apps for Windows and Android that could meet your needs for an easier to use interface. Most will run on an inexpensive tablet or Win PC ($100 low cost