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Stan, No apology needed.? Thanks for the info.? I've done some spreadsheet work on the data already, and they look reasonable. Thanks and 73, Jay

Sorry for not making it clear in my reply, Jay. The .csv files have the identical data as the .s2p files. They are the same columns in the same order, but delimited by commas rather than spaces. This

Stan, Thanks. I'm very familiar with the Touchstone files, but the .csv has no column headers or comments, so I don't know which parameters are there nor what format (real and imaginary, mag and

Me too. By the way, for the future, how can you tell when a connector has worn out too much.

Opens just fine here... -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed.

The .s1p and .s2p files are touchstone files. An excellent description is here: What is a Touchstone file? - Kirkby Microwave https://www.kirkbymicrowave.co.uk/Support/FAQ/What-is-a-Touchstone-file/

Please point me to something that describes the output format of the .s2p and .csv files exported by the app. Thanks. Jay KM4EP

BTW, I also use an SMA M-F adapter on the connectors on the NanoVNA because of the limited lifespan of the connectors. They are more or less permanently attached and everything goes through them. If

Thanks for that Allen, very interesting. Cheers...Bob VK2ZRE

Another resource that I found to have fantastic information on building calibration kits: https://www.youtube.com/watch?v=NSAQ2iQNX2I There's a followup video where he goes through and tweaks the

Get a crimper and some connectors and make your own M/F cables. The coax used is either RG-316 or RG-174. The RG-316 is preferred as it is low-loss although I doubt it makes a difference at 150 mm. Oh

Thank you to you and Fran?ois for the dive into Zo. I'm always ready to listen and learn. Russ kf4wxd

Thank you, that's the ticket! I couldn't remember it despite looking right at the "Display" menu item.

If that doesn't work, its Tektronix US Patent 2883619. Should be easy to find online.

Try this one.

File won't download. Flaged as corrupted. Richard K8CYK [email protected]> wrote:

Where you can measure the input impedance of a cable pair, a good way to determine Zo is: Zo = SQRT(Zoc * Zsc) where Zoc is measured with the distant end open circuited and Zsc is measured with the

Hi guys, just happened upon this thread. Not sure if its applicable, but if you're measuring a scope probe it maybe more complex than you think (10x probe). See the attached patent on the scope probe.

We had discussed at length the measurement of characteristic impedance. See this production /g/nanovna-users/message/32568 Which shows how, with a nanoVNA, to calculate the

Zo = SQRT(L/C) is exact when R and G (primary constants) are zero. An exact expression when they cannot be ignored is: Zo = SQRT[(R + jWL) / (G + jWC)] = SQRT(L/C) * SQRT[(1 - j(R/WL)) / (1 - (G/WC)]