Generation of trigger signals.

摘要

Apparatus for generating trigger signals for a serial stream of bits which has continously repeating patterns and which has been formed by serialising a plurality of parallel streams, eg a maximal length PRBS. The apparatus operates by identifying with which parallel stream cycle a trigger signal should occur and with which bit of the parallel stream in that cycle the trigger signal should be associated. Embodiments constructed in accordance with the invention can operate mainly at the clock rate of the parallel streams ie the lower clock rate.