Re: Performance of my nanovna V2 clone - return loss of port 2 seems much too high ?
Peter Ide-Kostic <on7yi.pik973@...>
Hello,toggle quoted messageShow quoted text
Thank you for your anwer
Ok, please find below the same test but done without any cables on port 1
and only a through cable to connect to port 1 and port 2. I have also used
400 points to get a clean accurate trace with as little noise as reasonably
=> At 1.5 Ghz; the return loss on port 2 is still significantly too low
(15.5 dB vs 20dB) expected, *so no changes*
=> At 3 Ghz, the return loss has improved significantly, *it is now 14.7 dB
which is a bit better than the 13dB specified officially.*
=> At 2.33 Ghz, the return loss is 11.7 dB is which is much too low, it
should be minimum 13dB according to the specifications
*Conclusion*: my measurements and yours simply confirm that the return loss
on port 2 of my nanovna 2 clone is unfortunately not as good as the one
of your genuine nanovna V2 model <https://nanorfe.com/nanovna-v2.html> .
This is the confirmation that I wanted to have (thanks for your help). I am
not saying all the nanovana V2 clones systematically under perform on port
2 the return loss, but on the other hand, if I have the issue then other
clown owners may have it too (quite common sense really). It will not
prevent me from sleeping at night, but at least I know....
Kindly note that the quality of the calibration loads and of the SS405
cables that I used for this test are perfectly OK.
On Mon, Aug 17, 2020 at 8:47 PM <@switchabl> wrote: