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[email protected]> wrote: But it is currently *totally impossible to get a valid calibration on a cable with a male SMA on the end. *The firmware doesn’t permit one to enter any characteristics

Ken, As delivered, the NanoVNA default calibration, Location 0, is apparently set up with the S11 reference plane at the on-board connector. You can run another calibration at the end of your cable

drkirkby@...> wrote: I should have been clearer here. There are two issues 1) The firmware prevents you getting a proper calibration at the reference plane. 2) Even if the firmware

You are doing nothing wrong - it is a limitation of the firmware in the NanoVNA. The calibration standards supplied are male. When you add a female-female thru on, you are adding a bit of transission

I reported a few days ago that I had measured the return loss of one of the female-female thrus supplied with my NanoVNAs when open at one end. Measurements were made with an HP 8720D VNA with an HP

While not an expert on this I check my SWR at the antenna to take the cable out of the equation.? After adjusting the antenna I add the cable to the test to see what the addition of the cable does to

Am I missing something big here? Does this nanovna calibrate the end of the cable as the reference plane? All VNAs should do this. Mine does not. Recalling cal 0, with the TX connector open, it looks

Yes. I did mean that to be detault behave, despite what I wrote would not have achieved that Dr. David Kirkby, Kirkby Microwave Ltd, drkirkby@... https://www.kirkbymicrowave.co.uk/

Hi, I have compared SWR measurements between my NanoVNA and a RigExpert AA-600. Small SWR measures somehow seem to look much better on the NanoVNA. An Antenna that on the RigExpert had SWR 1: 1.38

Hi Carlos Great, very assuring. Agree photos is a good idea and I did that some time ago when I started to comment this topic. One of these days I will issue a document when to use male and female kit

Or simply export the NanoVNA sweep files and import them in SimSmith. There you have grahic Q lines - and much, much more: All you possibly may want. Hans, DJ7BA -----Ursprüngliche Nachricht-----

Checking is better than assuming 'new = ok'. My 50 Ohm SMA load that came with my NanoVNA was open from the beginning. The double female SMA barrel on one side didn't screw all the way, just 2

Hi. I too purchased the testboard. Was wondering if you easily soldered to the pcb pads? What solder/flux did you use? I am having difficulty wetting the pads. The sma sockets weren't a problem. I

Considering the cost of a nanoVNA, I wonder if anyone sells these parts.? I worry about the same thing happening to me. I do have a cal kit from an old VNA I could use, with the proper adapters to

Hi dear all! I'm new to the forum, I didn't manage to start a new topic, but today my SMA 50 Ohm load stopped working. It worked yesterday when I received my NanoVNA, but today it does not. All the

That is effectively saying one should send novices to a place with childish admins. I believe the traffic here is too high and should be reduced. But your suggestion doesn’t seem a good way to

Why not make the impedance a selected item in the firmware with a default to 50 but allow manual input within a fixed range?

Whilst I accept 75 ohms is the 2nd most common impedance after 50 ohms, it would be nice if *any* impedance could be a supported. The bridge itself is 50 ohms, but there are two ways around this 1)

ditto, Yes Jeff. I would like to see the derivation. Need to find the text. The Q=1/BW, huh? It is interesting to note, folks have made an academic career in studying Q and how to measure it. And

Cool, thanks!