Base Station External Antenna Switching

Other sources <http://www.vonwentzel.net/ABS/Antenna/Perspectives/index.html> report that the A1034 Extreme Base station indicates it has switched to an external antenna by providing a "Antenna: External" message somewhere in the Airport tool.

Trouble is, I can not find such, at least in version 5.4.2 of the tool.

I'm looking for someone who uses the AEBS with an external antenna, and has seen this indication.