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The diagram from Miro F9LR is very generalized. It is not specific for the case where the DUT is a common mode current choke (current balun). It might be helpful to review what a common mode choke is

Hello Francois, I made an error (this was highlighted to me by a fellow list reader): everywhere I use: mu' + jmu", should have been mu' - jmu" All the best, Victor Op di 5 jul. 2022 om 23:13 schreef

Well.. you already see the multifunction capability (Spectrum Analyzer, 1 direction VNA) in popular instruments like the Keysight Fieldfox, and similar devices from Anritsu, etc. There will always be

Hello all of you, Op vr 8 jul. 2022 om 19:58 schreef DP <dpoinsett@...>: Perhaps this is related: When transporting non-DC currents in a coax, both the shield and the core need to be

"On the port 0 I connect shield and center conductor (as with any coaxial transmission line), on the other port I do the same. Simple connection, nothing fancy. Shield to shield, hot to hot :)" "Now I

Standard and required practice with anything RF: BOTH ENDS of the shield of a coaxial cable must be appropriately connected at their respective ends / ports. Here is my setup for measuring CMRR.

My favorite SDR is from AirSpy. Excellent quality and SW (free) support. Dave - W?LEV

I use Earthlink, and they do not block it, but I think I had to add the groups to my address book to avoid the SPAM filter catching them. 73, Jim

That may be true now but with the constant advance in technology and miniaturisation it seems quite likely future developments will add a substantial range of test capabilities to miniaturised NVA's.

You are right :) Here is a quick diagram (see attached) that shows: * 2 port setup * internally bonded grounds for two nanoVNA ports * two "available" paths the return current can take (through DUT

Use a VPN to connect to the Internet. While there are free VPNs, you should be able find a good deal on a lifetime plan for a premium VPN service, as these are preferable, through Groupon or

I think this might be better posted in the group manager's forum. A web search turned up several instances of this over the last few years. You could also contact GIO support about it. And it never

If you can put together a small computer / display with an RTL-SDR unit, that would work great for that purpose. My favorite USB SDR unit so far is the FunCube dongle. Zack W9SZ

The NANOVNAs are not the proper instrument to use for sleuthing RFI. A battery powered receiver in the AM band is excellent. Also, the TinySA is a small highly affordable spectrum analyzer which is

So many smmall devices and somjetimes power supplies generate RFI. Would it be possible to add a sensor to assist in detection, identifion and measuring RFI from such devices. Seems a logical

I say that, to follow what you are discussing, which seems interesting to me, there is a cruel lack of diagrams. F1AMM (Fran?ois)

But the smith tells you a lot about the frequency response over a given area... On single port test i measure Return loss... Swr... Phase.. And Smith Dg9bfc sigi Am 08.07.2022 11:56 schrieb Arie

You can measure the insertion loss of a common mode choke made from coaxial cable that is air wound or wound on a ferrite core by connecting the shield end of the choke between the center conductors

If not interested in Smith Chart, touch the nanoVNA's display, then choose trace, switch off the Smith trace. 73 Arie Op 8-7-2022 om 07:39 schreef Observer:

Hello nanoVNA without technicality seems unnatural to me. It is a measuring device; you must therefore master what it measures, otherwise it will not be too useful to you. The current use of the Smith