开云体育

Hi Herb Just for the fun of it I measured a blue junkbox core as in my closed chamber as seen on the picture. It can be calibrated on the inside with a SMA male ideal kit and therefore suited for the

Kurt Poulsen wrote: "Actually if you make a.sweep of the test fixture without the clamp, and in the NanoVNA-saver display r+jx then you have a graph for the real impedance to print"

Hi Herb Great, I am pleased to hear the progress. Actually if you male as sweep of the test fixture without the clamp and in the NanoVNA-saver display r+jx then you have a graph for the rod impedance

Howdy Ron, Properly calibrated, the nano should give you much better accuracy than even a very good SWR meter, because a VNA calibrates at many points (101 for the nano) across a frequency span,

Roger! What band are you doing your testing on? Also, is your xmtr running on AC power or battery? Tom AE5I

you can use impedance transformer. Transformer impedance ratio is a square of turns ratio (or voltage ratio). For example, RF transformer with 1:2 turns ratio will works as 1:4 impedance ratio.

If you are intending on tuning a 6-cavity BPBR set of 'cans' for 6, 2, or 70-cm using the NANOVNA and intending to obtain what is typical isolation with a 6-can duplexer, the NANOVNA does not have

Kurt, After a good nights sleep I and a second mulling over your post it became even clearer that I had deceived myself into thinking I could calibrate out the test fixture by treating it as an

Without fully working thru the math, I >>guess<< that back-calculating shunt would lack better accuracy (S/N) than straight measurement. A green (not blue) ~US$10 reflection bridge e.g. from eBay

Thanks for the reminder and suggestions. Yes, I have calibrated using my cables to connect with my antenna. This users group is great!

Dick, I forgot to add that currently all firmware releases for the NanoVNA-F are single sourced by BH5HNU. One of the advantages of the smaller NanoVNA is it has a number of creative firmware

Dick, The Nano-F has different firmware that is not compatible with the smaller NanoVNA. You can still perform TDR measurements from the PC side using NanoVNA-Saver or NanoVNA-Sharp. You can also make

Accidental issues are not the end of the world - just turn it in again.

I have a NanoVNA-F (Firmware Ver. 0.0.3). I also have a Users Guide that talks about the TDR function. I cannot find that function on this NanoVNA. Was the TDR function a Firmware Update ? Thanks for

An electronic switch that has to be pressed for a second or two to turn the device on or off would be even better in order to prevent accidental issues.? On Sat, 16 Nov 2019 at 10:13 AM, Harold

Please be aware you may be able to calibrate till 1500MHz but the measurement of anything different from SOL can still be completely wrong due to non linearity errors -- NanoVNA Wiki:

Ron, Have you calibrated he nano with a calibration standard of the same style that your antenna connector is? I.E if your cable connected to the radio has a male UHF connector, your nano needs to be

John, Try Dennis Real's firmware release for an even better antenna analyser experience. Search for forum member reald here or on GitHub.? On Sat, 16 Nov 2019 at 11:00 AM, John Ackermann

Thanks! That seems like a really useful combination then -- simple, easy to read display on the go, with full power when you're connected to a host.

Yes, full functionality is available. hugen