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Yes, I suppose I do, no pin so open(no contact). Lesson learned! Thank you again, Muggs KC3UDZ

A true TDR sends out a short pulse and looks at the time it takes for that pulse to return. The NANO VNA sweeps frequency and notes where the frequency when reflected impedance approaches Infinity and

"..cost beyond the software development." does not imply that software is free, on the contrary, it explicitly recognizes that cost. Even a "bad and slow" SA function is better than nothing if there

It's a wonderful, very useful feature. Very quick and easy to use, no other settings to make. It does use a different method than TDR, and is explained in the info for the first firmware version that

THANKS. I signed up -- F1AMM Fran?ois De la part de HA3HZ mardi 20 juin 2023 09:14

The tinySA group can be found here: /g/tinysa/topics -- Gyula HA3HZ ( http://ha3hz.hu )

Why do you think software development is free? However, adding a spectrum analyzer function to NanoVna is not a good idea, it will be a bad and slow analyzer with a lot of limitations.

Hello I have never used this kind of small spectrum analyzer TinySA - I read that there are at least 2 software on PC (like nanoVNA-saver) which allow to connect the small box TinySA. I don't want to

Let's go back to basics and use only the basic behavior of an open and shorted 1/4-wavelength of coax (in the cable, not physical length: SHORTED END measures as an open OPEN END measures as a short

Thanks for your suggestion, Stan. I will attempt to reset the sweep range to a lower stop frequency, but it won’t happen until tomorrow. I did make return loss and characteristic impedance

Yes 100ft Mookeef RG-8X from Amazon.

Sri? error? 73 qr0Envoyé depuis mon appareil Galaxy

Hello Robert et les amis?Je ne vous oublie pas mais impossible actuellement opération ?il gauche reprise peut être fin du mois73qro et 88 à? tous les qrasF8EZZ? joelEnvoyé depuis mon appareil

Yahbut you've already got the sweeping receivers and log amp/detectors, adding rudimentary SA functions is just code. That is why so many instruments, including from the big manufacturers, combine

It works with the NanoVNA-app software and the screen is correct. But the -saver S21 is just a scatter pattern. Help! Any idea what is wrong?

That's pretty close to 50 ft. Sure it's a 100 ft coil?

Also, for a cable that long using the 101pt scan, you need to set your stop frequency to about 70MHz to see the reflection from the whole length of the cable. So what you are seeing now may be due to

Looking at your photo your yellow trace shows S21 linear instead of S11 Linear. I don't know what revision of firmware you have but recent firmware has a Cable Measure function built in. Have you

John. Thanks for your reply. Yes I have examined 2 meters each side of center. No issues are visible. That doesn’t mean that there is no damage. I will look at return loss and characteristic

You didn't mention this but to me what you have determined is that there is something causing an indication close to the centre of your coax, have you visually inspected where the VNA is indicating