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Re: testing non-50 ohm filters was Re: [nanovna-users] NanoVNA port renormalization
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
By Brian Beezley · #39519 ·
Re: testing non-50 ohm filters was Re: [nanovna-users] NanoVNA port renormalization
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
By Donald Kirk · #39518 ·
Re: NanoVNA-H Connecting
An update, was able to update to Version 1.2 still not able to direct connect to any of the PC apps
By Roger C · #39517 ·
Re: Starting trouble for NanoVNA!
I will try that next time! 73 Jon, VU2JO [email protected]> wrote:
By Jon · #39516 ·
Re: Adapting the LiteVNA for SAR?
? 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
By Jim Lux · #39515 ·
Re: testing non-50 ohm filters was Re: [nanovna-users] NanoVNA port renormalization
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
By Brian Beezley · #39514 ·
Re: testing non-50 ohm filters was Re: [nanovna-users] NanoVNA port renormalization
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
By Donald Kirk · #39513 ·
Re: NanoVNA-H Connecting
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
By Roger C · #39512 ·
Re: The scroll button change the Start frequency
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 .
By Team-SIM SIM-Mode · #39511 ·
Re: The scroll button change the Start frequency
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
By DiSlord · #39510 ·
The scroll button change the Start frequency
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
By Team-SIM SIM-Mode · #39509 ·
Re: Adapting the LiteVNA for SAR?
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
By Larry Rothman · #39508 ·
Re: Starting trouble for NanoVNA!
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
By Barry Leonard KN4JRF · #39507 ·
Re: Adapting the LiteVNA for SAR?
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.?
By KENT BRITAIN · #39506 ·
Adapting the LiteVNA for SAR?
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
By Larry Rothman · #39505 ·
Upgraded GOOZEEZOO 7in NanoVNA SV4401A
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
By Orrin Winton · #39504 ·
Re: NanoVNA-H Connecting
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
By Stan Dye · #39503 ·
Re: NanoVNA-H Connecting
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
By Ham Radio · #39502 ·
NanoVNA-H Connecting
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
By Roger C · #39501 ·
Starting trouble for NanoVNA!
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
By Jon · #39500 ·