开云体育

Hi Oristo

Yes if you load is also perfect 50ohm but such a load cost many $ ? although the load supplied with the NanoVNA is pretty fine and you correctly mentioned "observe no appreciable reflection" which requires both the candidate cable and load are good quality. Have a look at AC6LA home page about ZPlots and the his coac calbe information where you see the velocity factor which has influence on the delay is frequency dependent. He has a direct graph on this issue
Good luck with your experiment

Kind regards

Kurt



-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af Oristo
Sendt: 4. oktober 2019 22:59
Til: [email protected]
Emne: Re: [nanovna-users] Cal-Kit Standards' Definitions



Thanks for the response!

Remember the Electrical delay assumes and ideal 50 transmission line

So, if I

* properly calibrate at the VNA port

* plug in a candidate cable terminated with calibration load

* observe no appreciable reflection



.. then that cable unterminated should be satisfactory for delay testing..