I have USRP+DBSRX. I'm trying to listen to uplink channel (MS->BTS) of GSM. To do that, I first need to be synced with the BS (i.e. listen to synchronization channel of BTS). Then I have to change the center frequency to uplink channel, but I need to know how long it takes before USRP gets stable or I can lost the synchronization. Unfortunately, I can't find what the tune delay of DBSRX is. Maybe someone knows?