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Al, From the NanoVNA Menu Structure Map get the Home Menu on the screen. Once you get all the traces and displays the way you want them, Touch CAL then SAVE then SAVE 0 If you only use one frequency

Hi Robert That was a nice walk down the memory lane. I the last few lines I made a promise not yet fulfilled I have also learned a few more trick since I made this "monster document". I am still busy

I tried this connection with full through cal (excluded isolation) with the HP 8753C. Shields were commoned at the junction of the coax from the two ports. Choke was inserted between the S11 and S22

Hello, This email message is a notification to let you know that the following files have been uploaded to the Files area of the [email protected] group. * /w7zoi.net-mynano-nanozoi.pdf (

Hi Igor and others Just a small note There is a "snag" regarding converting a S21 measurement to impedance because the math used request that both the source and load impedance from both of the two

Hi Al Get all the trace settings and formats, start/stop stimulus, scale etc sorted out the way you like them, do a calibration, then save to slot 0 (0 is important here as it's the default that is

I got my NanoVNA-H today. It seems to work fine, and the small size is nice. I will be using it primarily to check SWR on various antenna designs. Is there a way to save all my settings once I have it

AL values are set based on the best guess idea for how many turns will be on a certain sized core. Let me digress a bit.? For coils wound on high permeability cores (think u > 200) nearly all the

I do occasionally just rerun e.g. thru calibration.

Exactly Roger- ignoring the reactive component and not knowing the resistive component - and also knowing the antenna system' complex Z can lead to worse CM. W8 JI, and Owen Duffy, in addition to the

In my opinion the working of a CMC is to stop RF-currents on the outside of the braid, whether it originates from the antenna or from surrounding mostly vertically polarized disturbances. Thus these

Some interesting thoughts on this subject by K6JCA with an extensive reference list on this topic at the end of his blog post.

I had the same problem. Reset needs to be done before calibration. I wonder why the firmware developers just don't do it before starting a calibration. Another NanoVNA "mystery".... Roger

There is some debate on how the measured S21 common mode choke impedance actually effects the performance of an antenna system. Here is one viewpoint by Owen Duffy as food for thought.....

Why? The goal of the measurement described is to evaluate the impedance (L) presented by the CM choke when installed in the feedline. Presuming #14 or #12 wire is used, the DC (not the same as

Hi, Gyula, Thanks a lot for very interesting links indeed. I need a time to digest it. However, just interesting, which readings shows a “big” VNAs in S21 if short both ports with previously

The permeability of most cores can vary (per spec!!) +/- 20%. This variation, of course, reflects on the inductance of each winding. Dave - W?LEV -- *Dave - W?LEV* *Just Let Darwin Work* *Just

Ok it looks like you have to press "RESET" before you can re-do the calibration? I was afraid RESET would clear out all the saved calibrations

I think part of the problem is for some reason when I go into calibration, the "Load" item is highlighted still. Don't know why

There seems to be no narration. Can't you just mute the sound?