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Chris, The only time you should use the Reset button in the Calibration menu is immediately prior to performing a calibration. Reset clears calibration entries in RAM so if you use it immediately

Looks like it is saved in the calibration settings not in the configuration settings.? That is what I had wrong.? Also, I want to confirm that you have to reset a channel before you save to it.?

It occurs to me that it might be easier to characterize a longer piece of line (which allows one to work at lower frequencies and have fewer capacitance problems) and then cut the desired

I have version 1.0.45 Build Jan 30 2021

I absolutely agree I was talking about ideal lines... and ideal VNAs. One must always take these things into account. Thanks for keeping me honest....

Hi Chris, Please let us know the model/version of Nano you have and the version of firmware from the Config>Version screen. What you're doing should work as that is how I configure my unit. Thanks

I want to save Trace 3 to do SWR instead of phase. Even though I save it in a profile and the general settings. It always pops back to phase. How do I make these changes permanent? Also, when I want

I confirm my email address roberto.delchiaro@... ---------- Forwarded message --------- Da: Groups.io <[email protected]> Date: ven 30 lug 2021 alle ore 12:14 Subject: [nanovna-users] Confirm

Ward, What you say is true for theoretical transmission lines with no attenuation. A physical TL has attenuation and you don't get exactly 0 ohms at the end of a open 1/4 wavelength transmission line

or open.? Either way, you get mag s11 = 1 when it's a 1/2 wavelength long. However, the OP wanted 1/4 wavelength. So you could use the fact that 1/4 wave transforms the impedance at the far end. So

To measure 1/2 wave you could simply short the far end. Sweep the frequency. When s11 is -1 (impedance is zero) you're at the 1/2 wavelength frequency (or a multiple thereof, start the sweep very

The answer to your question is that you need to do several things in order to accurately determine the length of a 1/4 wave length of balanced 450 ohm ladderline for operation at 2M (144 MHz.). 1. You

There were a lot of interesting answers to other questions, but the question I had was whether to use or not to use a balun, which roncraig1 did address. Thank you roncraig1.

Window line is great at HF.? But remember that it consists of tandem sections of transmission lines that have two different characteristic impedances.? When the wavelength is so long that a large

Hey Rick et al., TNX for the heads-up about the nanoVNA guidebook! 73 Ray 4X1RB From the home of Prof. Emeritus Raymond (Reuven) Boxman School of Electrical Engineering Tel Aviv University Cell:

This is why I suggested the use of a choke at the feedpoint; you can use a few turns of the transmission line or a so-called "bazooka" or "sleeve" balun:

Interesting questions. How about the same scenario for the 300ohm balanced windowed line. How would you measure for the 1/2WL of that cable Fred - N4CLA wrote:

NanoVNA-App NanoVNA-Saver also work vs SAA2

I'm not exactly sure what you want to measure. I assume you'd like to measure the velocity factor and the characteristic impedance. Might I suggest the following: Build a test fixture to connect the

In addition to the maximum span needed for short distance resolution in TDR mode, some industries, i.e. the cable television industry, utilize wide bandwidth filters, band stop, and high/low pass