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Well, yes, but the OP didn’t specify exactly what he wanted to do, so we’re left guessing. Does he want to measure the physical length of a cable that’s already installed, so he can order a

Hi Austin. I will contact you directly to help you get going. In that process we can update the documentation so that it is completely descriptive and then report back to this group. My goal is to

I have reentered this group after a long absence to see what's happening now. Measuring the cable length comes down to measuring the Velocity Factor (VF) first. The simple and basic way to go is take

Generally I would say, if the nano is showing up on a com port when it is connected either it isn't actually in DFU mode.If it is an old model setting dfu mode is accomplished by shorting an internal

Very important if you are making phasing lines for stacks of Yagi antennas.

I thought of something. If I buy a NanoVNA, will I require sighted help to get it up and running to the point where I can use the web interface? Or do I just need to connect it up and start the

Wonderful! I'll check it out.

In my firmware exist option Measure->Cable User need select correct frequency range (minimum/maximim frequency depend from cable length on smitch chart must rotate by 180 degree) As can see in this

I tried STCUBE, but it too didn't pick up the nanovna either. The computer sees it on com4. Home Email: dokrent@... W7DAO

For an example, it is extremely helpful when troubleshooting a transmission line fault. I have an Anritsu Sitemaster that I use to do DTF (Distance to Fault) tests. I can locate a problem, usually

Yes. 73, Willie N1JBJ

I can give a practical use - you have a box of cable (whether Cat 5 or coax or HV neon wire) where it's not obvious how much is in the box (since you didn't buy the stuff with "foot markings" on the

Dear all, Could someone answer this:- Why is there this obsession to electrically measure the physical length of an arbitrary length of coax? Unless you are trying to make a long distance physical

See also a couple of videos from Alan W2AEW on this subject, including a simple TDR circuit which I have built and works adequately for my needs. Chris G4CWS

Kind of circling back around to *this* question. You've got a spool or coil of coax sitting in front of you.? How do you measure the physical length without actually unspooling or measuring the spool

"Scavenger Time Domain Reflectometer Coaxial Cable Tester," Stan Johnson, W0SJ. QST, May 2021, pps. 30-33. 73, Vince N2JRS

Does this kit TDR require an oscilloscope to make the measurement? [email protected]> wrote:

The latest versions of the NanoVNAs provide the TDR function.

Syd, I would like a board of kit if it is still available. Please provide details. Thanks, Mike N2MS

Sounds intriguing, do you have more details, or maybe a pointer to the QST project? If you made your boards with OSHpark, you can designate them as public, so anyone can order them. Not sure if other