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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

I am a new NanoVNA user. Mine is an H v3.6. No firmware updates have been done. I have been using it only for a few days. Sometimes, on sliding the switch on, the screen is blank, but the blue LED is

Many thanks ddemos1963 for sharing your success in making NanoVNA App works with Wine in Linux. I also use only Linux. In Wine I ran NanoVNA-App-Setup-V1.1.209-0D18.exe and the installation went

Nizar, With only S11 and S21 measured, the renormalization depends on the symmetry of the device measured. Most passive linear devices have S21=S12. (Isolators are an exception.) Many filters have

Don, attached are the specs I have for your filter. Note that the G.D.T. entry is blank. GDT means group delay time and this filter has no spec. Murata made many special types for FM IFs where group

Thanks for the test, Don. I have dozens of Murata 10.7 MHz filters from 110 to 280 kHz bandwidth. Some show little difference when reversed, but most do. Incidentally, it is probably the difference in

Hi Brian and Nizar, As a reference I went and tested my 10.7 MHz ceramic filter connected in both directions and see very little difference (part number SFE10.7MA5-A which is a Murata part number).

Hi Still no reaction with this topic, Zero simple graphic displayed without strike should be more pleasant to read on the screen especially if you have some vision trouble to avoid confusion with

Hi Brian May be Jhon can reverse the same ceramic filter and get a comparative response with forward curve already succesfully published here , i expect to found almost the same response, indeed

The renormalization program is listed at the top of this page: http://ham-radio.com/k6sti/mu.htm See the bottom of the page for downloading instructions. I think the program works, but I don't have

I've observed that reversing just about any Murata 10.7 MHz ceramic filter alters the response and changes the measured distortion in an FM tuner. I believe this means that S11 differs from S22, or

Hi John, Thanks for running this comparison test. Looking at all 3 of your plots the renormalization routine did an amazing job compared with no renormalization in which no series resistors were