the method of time synchronization of the wirelessHAERT network

I know the wireless HART protocol using the TDMA protocol which will work with the time synchronizaition of all the wireless network.I want to test the device's timing synchronization quality.The first thing i shoule know the time synchronizaition method which the wireless HART devcie using . Can anyone tell me the detail of it?(I using the wirelessHART mote(DC9003A))