Ubiquiti LTU-Rocket Manual page 5

Signal LEDs
Each LED will light when the wireless signal strength is equal to or greater than
the LED's threshold value for the current channel width setting. The default
threshold values for each channel width are shown below:
Link LED
Off
On
GPS LED
Off
On
MGMT LED
LED not used.
Data LED
Off
On
RF Off
Syncing
Beaconing
Registering
Operational
No GPS Synchronization
Non-Operational (Weak Signal)
Operational (Strong Signal)
No Ethernet Link
Ethernet Link Established