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If you boot into DFU mode, you should find it under USB Devices in the Device Manager, if you have the right driver available.

Hi Mel, Because you insisted on Hard reset, you gave little information about exactly what kind of device you have. If your white screen is 2.8 inches in size, it is assumed to be in DFU mode. (dfu =

https://www.st.com/en/development-tools/stsw-stm32080.html 73, Zack W9SZ [email protected]> wrote:

Thanks, need to find the SW. Mel, K6KBE

Thanks Clyde, will try that where to find DFU program??? Mel, K6KBE

NOTE: the DFU mode screen is only white for the older, original nanovna's including the H. The H4 DFU screen is dark.

Shorting the BOOT to VDD and turning it on, then removing the short, puts the VNA in DFU mode. when in DFU mode the screen is suppose to be white. you might try connecting the VNA to your computer,

I am not using it but I think DiSLord firmware annotates the save buttons. Roger

I really with we could rename the Save locations, Save 0 = “7 MHz” for example, Save 1 = ....... -- Regards, Chris K2STP

This alalog of this calculator: https://www.leleivre.com/rf_lcmatch.html Allow compencate current impedance to 50Om

Can anyone explain to me how to interpret all the figures displayed when the "L/C MATCH" tick-box is ticked under Display/Marker/Smith Value - and how it can be used?

Thank Bill for this post. I just managed to update my H4 successfully following your procedure. In my case I installed Homebrew natively to my Mac, followed by the installation of Dfu-Util. I then

Hi Clyde, I would like to bring to your attention my website where you can also read about possible applications of NanoVNA. Android programs are often called applications, here NanoVNA-App v1.1.xxx

Hi Leighton, In your first post, you write that your firmware version is 0.2.3, which was released in early October 2019. From this, I think there are probably possible hardware bugs. What I mean?

You're not alone. My 50 Ohm load went bad after a time. Fortunately I had already purchased a couple of gently used Mini-Circuits loads from W5SWL by that time because I wanted a couple of spares. 73

I should have checked my SOL terminations - I didn't really consider them as being a problem. It appears that my load is no longer a load. Thank you all for your input - it is much appreciated. I am

Actually, even if the screen is non-functional, I think you can still runn the unit headless through the usb port and using NanoSaver or OneofEleven's great application, NanoApp.? On Tue, 8 Dec 2020

I will take the unit apart and check the cable.? The last only works when the screen comes up! Mel, K6KBE

Not plugged it into the PC yet will try that, Thanks. Mel, K6KBE

Also, was the unit exposed to any vigorous vibration or temperature changes? You might have a cracked solder joint where the LCD flex ribbon connects to the PCB under the display. A few other forum