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Before calibrating, perform a reset.? Then select S0 reflection. Bob

Well there seems to be no concensus about this.? I have a couple of things more to try. However, starting at the right edge, open circuit, and increasing frequency as the trace swings clockwise, at

A programmable dongle could translate between USB virtual COM and a supported BLE profile. My experience writing hardware-specific apps that worked well for many Android devices and generations was a

Have you tried the 1/8WL open/short method? Where the two Zs cross is the Z0?

iOS bluetooth control may be challenging, Apple locks down the types of communications that BT can handle to primarily audio-centric (with specific exceptions for handshaking apps and Apple's own

On Sun, Jan 26, 2020 at 07:07 AM, Andy UA3RAW wrote: As it was described by DJ7BA in #8655 message, you must find the lowest (=Lambda/4) resonance frequency. (Impedance there is about 0 Ohm.) One full

Bear in mind that WiFi and Bluetooth require a lot of real estate and impose a lot of restrictions on board layout. - Ed

3.2 inch is the biggest.? Why not just replace the touchscreen? Use an xacto knife to cut around the outside edge of the display to remove the old touch surface and just bond a new 3.2 inch

Ok Herb, I'll try. As it was described by DJ7BA in #8655 message, you must find the lowest (=Lambda/4) resonance frequency. (Impedance there is about 0 Ohm.) One full revolution in the Smith diagram

HI all,i have a nanovna that i replaced the screen on with a 3.2 inch version that i got from china,it worked fine untill i cracked the screen,now the touchscreen doesent work,i need to buy a

Have you tried to solder the resistors upside down such that the resistive element is on the same plane as the trace? I have not tried it but it seems that it would improve the behavior of all low

Herb, I fully agree with your comments,? the NanoVNA is an excellent device and definitely on the money, I read on giithub that Hugen even has idea's to improve the impedance of CH1 !! When hardware

For driver documentation testing, I installed Python 3.7.6 from Windows 10 Microsoft Store. Unlike much Windows software, Microsoft Store only installs apps separately for each user on a PC. This

On Sun, Jan 26, 2020 at 04:51 AM, Andy UA3RAW wrote: Herb, it seems to me that a half-way around the smith chart is 1/4 wave length. Isn't it? )))

Oristo, Thanks for your information abt. the serial port, actually I am using a version 3.1 comport and sofar I saw no problems in comunicating with theNano VNA-H4 , with the firmware as supplied by

On Sun, Jan 26, 2020 at 04:38 AM, Jos Stevens wrote: "This is an eye opener for me, it appears that at start NanoVNA-Saver is using the C0 calibration of NanoVNA, untill now I thought these

Thx for the info ! Hans

Yes No, USB serial communication from nanoVNA to Python is not reliable for all firmware, USB cables and versions of Python. Using a USB 2.0 (rather than 3.0) port e.g. by hub sometimes helps. Adding

MAX2870. Maxim has an oscillator chip MAX2870, which gives from 23MHz to 6GHz. Digikey says it costs 10?€$ whatever. I know this is too late for this version but maybe in the future, and then there

Herb, it seems to me that a half-way around the smith chart is 1/4 wave length. Isn't it? )))