Abstract: A system and method for detection of frame synchronization in turbo encoded and concatenated forward error correction (FEC) systems. The system and method provides a configurable conditional synchronizer module monitoring turbo decoder input data, with an additional first synchronization check module monitoring turbo decoder output data, and an additional second synchronization check module monitoring block code decoder output data in concatenated systems. Conditional synchronization found by the configurable conditional synchronizer is reset when either check module one or two detects a loss of sync, thus reducing the probability of false synchronization locks.

Abstract: A method and system employing a plurality of modules having a scan chain combiner coupled to the output of each one of the plurality of modules. The scan chain combiner selects one value per scan chain received from said plurality of modules, wherein the value is indicative of errors in at least one of the plurality of modules. An output mux for communicating the value to a tester via a plurality of chip outputs is coupled to the scan chain combiner.