# "Time To Lock" in Bit Timing Synchronisation

In the context of bit timing synchronisation in digital communications, what is meant by the requirement that says the "Time to lock to a sampling point should be no more than X symbols"?

• How about adding some links to the information you found online? Many communication systems include in each transmission a preamble designed for the synchronization system to lock on before the data (the payload) is actually transmitted. If this preamble is $X$ symbols long, the time for the synchronization subsystem to lock on should be no more than the time duration needed to transmit $X$ symbols on the channel, no? Jan 8, 2015 at 14:42