开云体育

Hi Brian, Your wish is my command. See attached .s2p files for my ceramic filter with 10 pf load connected direct to NanoVNA-F ports tested forward and reverse connected. Note: I set my NanoVNA

Don, how about measuring the filter with a 10 pF load using no impedance matching (50 ohm source and load). Reverse the filter, measure again, and post the two .s2p files. I'm curious what my program

Hi Brian, I repeated the tests but this time using resistive matching pads to provide 330 ohm impedance to both the input and output of the ceramic filter versus using my very broadband transformers

An update, was able to update to Version 1.2 still not able to direct connect to any of the PC apps

I will try that next time! 73 Jon, VU2JO [email protected]> wrote:

? Use S21 mode with an amplifier. People have been using VNAs as radars for years. The NanoVNA just makes it easier. Dealing with the big first reflection is tricky. One way is to use a separate

Thanks, Don. Your filter shows much more response variation with a capacitive load than the 230 kHz filter in the Murata curves. I don't think anyone adds capacitance on purpose. In the past I have

Hi Brian, I went ahead and tested the filter response using a 10 pF, 33 pF, and 68 pF load capacitor. Attached are 3 plots and the reference plot on each of the attached plots is when I'm not using

OS is Win 11 Pro I've changed USB-A/usb-c cables that was the first issue. I connected my phone to this cable and saw data, I believe the cable I'm using can communicate with the NanoVNA. I'm not

Hi DiSlord Thank you very much , long press by touchscreen on M1 marker and all become OK , I discover the long press functions Now Hi Hi Thanks again. 73's Nizar .

You select Start frequency change from leveler (click on start frequency at bottom) Click on M: xxxxx Hz at top for select marker move mode

Hi All I have H4 + 1.2.40 , after some use without problems , i have a serious bug with the scroll button , it does no more change marker frequency but start frequency , is it normal ? may be i am

Thanks, Kent. I'm more interested in using signals through air. The front-end of the LiteVNA was described here: /g/liteVNA/topic/99749985#msg1054 I see I made a mistake in my 1st

I have the same problem. Nanovna-H, Firmware V. 1.2.40. Had it for several years. Also the menu seems to start by itself, and go into whatever setting it feels like. Maybe case is interfering

Hi Larry I have worked on several GPR projects.? One is currently looking for land mines in SE Asia. A LOT of loss going though dirt.??? And a big impedance bump at the air/dirt interface.?

Folks, Using the NanoVNA as a signal source for Ground Penetrating Radar (GPR) was discussed a couple of years ago. Today on Hacker News, there is an article about a home-built Synthetic Aperture

Has anyone used the SV4401A nanoVNA ? Thinking of getting one off Amazon, but most of the reviews are for other models of nanoVNA. Orrin WN1Z

Roger, we will need a little more info to help you effectively. Which OS and version are you using on your PC? Win10/11? Win7? Win8? some flavor of Linux? But a couple of first notes: 1. Don't use

On a PC, go into Device Manager and verify if the PC is detecting the NanoVNA port when the connected NanoVNA is powered on. You should see something like “USB Serial Device (COMx)” where x will

Not able to connect to any apps. PC, Web, and Android. Used OTG Cable, USB a to c on PC Version 1.1 What am I missing Tks, RogerC