Regulatory tests generally require testing be performed on all available antennas simultaneously where applicable. Radios with two antennas are either 1x1 SISO radios with diversity, or they are 2x2 MIMO radios. A 1x1 radio with diversity can only transmit on one antenna at a time, whereas a 2x2 radio transmits on both antennas simultaneously. The lru allows the antenna under test to be configured when the underlying radio is a two antenna 1x1 radio with diversity. There is no option for antenna configuration when the underlying radio is single antenna or 2x2.

Note: The Sterling LWB5+ is the only 1x1 radio that supports a diversity antenna architecture. Antenna configuration is only available in the lru when a Sterling LWB5+ configured for diversity antenna operation is present.

The configuration menu is entered using the cfg command.

lru :>cfg
WiFi Configuration Menu:
	Domain: FCC
	Antenna: ANT0
cfg :>?
Configuration menu
options:
	-d [FCC | IC | ETSI | JP | AU | CN | TW] -> Set Domain
	-a [ANT0 | ANT1]                         -> Select Antenna (Diversity Antenna/M.2 only)
	 x                                       -> Return to previous menu

WiFi Configuration Menu:
	Domain: FCC
	Antenna: ANT0
cfg :>

Note: The set of available configuration options varies depending on the underlying radio.

To set the antenna, use the -a command. If the setting is successful the lru will reflect the new setting in its status and help commands. Use x to return to the previous menu.