How to know if the external antenna is worked on jetson or not?!

Excuse me, I have a question, I use intel wifi card AC 8265 with external antenna ?! How to know the performance of the antenna if it’s working or not?! If there is a command to check the input signal of the antenna ?!
And thank you.

Hi, you should check with vendor of wifi module and antenna for that. In addition, there is a wireless compliance guide doc of TX1 and TX2 in DLC, just for your reference.