Ubiquiti Networks RockeM - Manual (Page 14)

With airSync, the basestations make use of a common
clock source using the built-in GPS receiver. One device is
configured as the synchronization master and the others are
configured in Slave Mode and provided with the MAC address
of the Master.
Once this is done, the Master and Slave devices synchronize
their transmit and receive cycles so that they transmit at the
same time and receive at the same time. This resolves the
interference issues.
Enabling Master/Slave Mode
1. Launch your web browser and log in to the airOS
Configuration Interface.
2. Click the Ubiquiti tab.
3. Select the appropriate mode:
• Master Mode (synchronization master device)
• Slave Mode (slave devices)
Note: Enter the MAC address of the Master in the
Sync Master field.
4. Click Change to save.