开云体育

I should have also mentioned in detail how you measure things. Choose "Display," then "Format S11 (Refl)." Looking down the list you will see "Resistance" and "Reactance." Choose which you want to

I have some SMA right-angle connectors. The center pin of coax is supposed to solder to the inner pin connection in the connector, and the shield is crimped with a ferrule to the connector. But what I

Garry says: “… Then attach your inductor. …” The devil is in the details with such a simple-sounding statement. Attach it how? There are 2 ports on the NanoVNA, each with a center conductor

I believe the original question was more about "how do I figure out which mix this unmarked toroid is" and for that, measurement accuracy may not be super important, especially if you have some known

The different measurement techniques usually arise due to the propagation of error. In the case of vna's the measurement methods relate to the impedance of the DUT. You will find a number of articles

Go to https://www.g8jnj.net/balunsandtuners.htm then scroll WAY down to "The easiest way to identify most ferrite materials is to wind about four turns of wire through the core and then measure the

Hello Unun means nothing. You should know that the nature of the material of the torus is of great importance if you make a choke (self) with it. If you made a RUTHROFF transformer, it is much less

Hello I was having an issue with RFI in my shack, I'm in an apartment and my MFJ loop is at the back of the office next to a window and my radio is an Icom IC-7300. I made a CM choke from a 240-31

Garry, my experiene: when trying the buid a bandpass filter (mesch coupled filter) with ELSIE I noticed that the series L?s are only dependant on the chosen bandwidth. In my case 17.5 uH was the

#### reply to Kurt's Toroid Measurement It's quite easy to get a simple measurement on a toroid inductance and to see the inductor's behavior over a desired frequency band with a nanoVNA. So easy, I

Jim...All good points. Yes, I have been thinking about a dedicated nanovna and fixture and the various options needed for different cable types. For the multi-channel snakes the VF is pretty similar

You might make up some XLR cal loads - Open's easy. Short, and I'd go for a 100 or 120 ohm load, since it's probably shielded twisted pair. But yeah, if you're looking for a fault somewhere in the

real mode will do you. I've used the NanoVNA on Cat 5 network cables. SMA to BNC: BNC to clipleads (EZ-Hook variety).

Log mag is *always positive* (it's absolute value).. Yeah, you need to be in a linear signed mode

I was just trying to point out that if you have a choice between using a short or open on any device, the short would minimize or eliminate interference that might enter the end of the cable. Joe

Joe.. What I'm trying to do is locate a short or open in a multi-channel audio snake. I really can't afford the high priced spread...

I do fault locating with the Anritsu SiteMaster and the CellMaster. I prefer to use a short when testing because it seals off the end of the cable and avoids/reduces interference. This can help when

Roger...I was in Logmag mode. I'll try Real tomorrow Jim...In Logmag mode the short and open appear identical as far as I can tell

It should work identically - short and opens have 180 degree difference in the phase of the reflection, and that shows up in the synthetic TDR from the frequency sweep.

The Files section of this group contains an "Absolute Beginners Guide to the NanoVNA" Roger