You can't really do that. You could put a 'terminator' on the unused antenna connector, which will have a similar effect and avoid damage to the AP or radio.
There is some guidance
here, and you should get a 50Ohm RP-SMA Terminator.
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Herman Robers
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If you have urgent issues, always contact your Aruba partner, distributor, or Aruba TAC Support. Check
https://www.arubanetworks.com/support-services/contact-support/ for how to contact Aruba TAC. Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.
In case your problem is solved, please invest the time to post a follow-up with the information on how you solved it. Others can benefit from that.
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Original Message:
Sent: Jun 22, 2022 06:51 AM
From: Sven Baumann
Subject: AP-504 how to deactivate one A1 Ant Port
Hi,
i have a customer ( AP-504) wich wants to deactivate 1 off the Antenna Ports A1 should be deactivated.
Is this possible if so how can it be deactivated.
Thanks
Sven