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Could your antenna be picking up significant amounts of signal and overloading the input of the VNA?

For some strange reason my NanoVNA is now not responding correctly to any antenna designed for the AM broadcast band and instead is showing it as an open. I have confirmed the calibration using the

it is? difficult to measure the output impedance of a high power amplifier (S22) in a meaningful way, because it really means you are feeding a signal into the output (like a salmon swimming

I think the question was about finding Zeenko's store, so here is the link: https://zeenko.aliexpress.com/store/5800447?spm=a2g0s.8937474.0.0.192b2e0epseB3c wrote:

One big reason why I got the device is to determine an unknown impedance on a transmitter and to adjust it to 50 ohms to drive antennas better. What method would I use for that, the transmitter by the

There are several ways to measure parallel L/C resonance with a VNA. Some are described half way down in this article. https://www.nonstopsystems.com/radio/frank_radio_coax-sw.htm Roger

Here is an excellent video that shows you how to use a NanoVNA-H/H4 to measure crystal parameters. https://www.youtube.com/watch?v=G9zZRNzhsEE Roger

You were asking about fw for SYSJOINT and that is their official group. Whatever. Rewrite the firmware from scratch for all we care ?

Sorry, not V2...

yes, and it's a lot easier, because the LC circuit is lower Q, so you don't have to worry about "missing" the resonance with only 101 points.

I understand how to use the Nano-VNA to measure a crystal's frequency. Can I use the same configuration to measure the resonant frequency of a parallel capacitor and inductor?

Am Samstag, 4. Dezember 2021, 15:02:55 CET schrieb Hugen: Thank you for instantaneous response. Erik, DL1ECD

You can buy NanoVNA-H4 from the zeenko store. NanoVNA-H4 is now sold by zeenko in version rev4.3. It should be noted that the MCU used in the NanoVNA-H4 rev4.3 is the STM32F302CBT6. We have tested

I am just finding this info about the V2plus4 and it’s locked down boatloader and fw author not willing to add ability to disable temperature compensation when CW mode is selected. So is there no

/g/nanovna-f-v2

In the absence of solutions I have returned to the original Firmware. With it I can manage my NanoVNA from the PC with the usual software (NanoVNA-App, NanoVNA-Sharp, NanoVNA-Server). Too bad not

Thank you for the info, Jempi. But is this firmware version the correct one for my nanoVNA-F (not V2!) by sysjoint?

Hi all. On amazon.co.uk I bought a NanoVNA from AllAboutFun. It had the STM32F302 chip. I contacted the company and in their reply they said According to your question, we have communicated with the

HI, Pse Check https://deepelec.com/2021/09/11/nanovna-f-1_0_3/ Latest version 1.0.3 Sep 9-21 Suc6 JP

Hello Erik. Zeenko's NanoVNA H4 is not a good NanoVNA? I have a Nanovna but i want to buy an H4. Regards Félix