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how do i calibrate the nano vna and how do i use the usb b type cable

Another opinion is offered here, along with a bit of mocking of you "online experts" - his words, not mine: https://owenduffy.net/blog/?p=17865 -- John AE5X https://ae5x.blogspot.com/

I don't understand this TXCO error concern. Is the NanoVNA being used as a precision freq counter? If you are using it for measurements between 2 freqs, what is the % of precision you are expecting

Hi Mike, I agree totally ! It would be very useful in my case, waiting to replace the TCXO. For the moment, i'm obliged to multiply the desired frequency by 1.0000855 to compensate the too large error

I bought mine last may 14h from this seller https://www.alibaba.com/product-detail/Original-Hugen-NanoVNA-H4-4-0_62455845943.html?spm=a2700.13153074.0.0.6a7e73351PtZTQ and DHL expects to deliver in

Bob, you got it from the groups.io file area, though it takes a bit of finding, since it wasn't found by DuckDuckGo or Google. It came from:

I got mine today and I bought it around Apr 14. I live in Finland. Mail between Europe and China is currently not working IMO.

As previously stated, you're fine. What you are seeing is quite expected. Take your cal standard of 51 ohms: Assuming your cal standard is truly is 51.0000000 ohms (DMM measurement tolerance), the SWR

With the help you can see what commands are available in the given version. -- *** nothing is permanent only change ( http://ha3hz.hu/ ) ***

Good afternoon Gents. Ive just updated my firmware and manage to connect to the vna with putty however when I enter the command vbat_offset 150 I get the response vbat_offset? Any clues ?

It would be nice to have a menu option to calibrate the frequency. It is easy to adjust the Si5351A output frequency, all libraries for it include this function. 73, Mike AF7KR

I did this about 2 years ago similar to Roger Need's second link. On the output of the 1:49 balun I connected a 2400 ohm resistor and in series with this resistor on its ground end I connected an HP

Bill, That was a deleted word, not mispelled. Prolly due to my phat phingers. ?___ Sent from my two way wrist watch 73 de W3AB/GEO?

Hi Ed It is quite normal what you see. Please note that the number of point are only 100 so for the span used 50MHz you have a point for each 0.5MHz. Reduce the span to e.g. 140 to 150 MHz and see for

Hi Geo, In my two way wrist watch I have restricted the spell-checker to merely suggesting by underline any words it thinks are wrong and it is not allowed to "autocorrect". Sometimes it underlines

Should NOT flake off. My droid won that battle. Ugh! ?___ Sent from my two way wrist watch 73 de W3AB/GEO?

Jason, As an ex-employee of M/A-COM I can vouch for what you learned. We made special connectors for the test equipment companies, HP, Wiltron and such. The plating should flake off any OS connector.

Thank you for your message. I'm sure of my correct measurements: -1- The relatives frequencies errors are ~ equal on the CW output at 100MHz and direct TCXO (^-86 ppm) -2- The reference of my

Roger, The HW version is 3.4 and FW version: 0.4.5-1-gfbbceca. As i wrote before: " With a loop, i was able to measure the TCXO frequency and found 25.997748 MHz instead of 26MHz ! This error

Using the SMA-M/SMA-F adapters as connector savers like I think you show, Stan, is a very good idea. Even very high quality SMA connectors (>$50 each) degrade in match very quickly. Cheap ones with