A bit-error-rate tester provides for testing of links with different numbers of channels without replacing or reconfiguring an included pseudorandom word sequence (PRWS) generator. The tester includes a transmitter and a receiver, each with generators for parallel evenly staggered pseudorandom bit sequence...http://www.google.de/patents/US4791653?utm_source=gb-gplus-sharePatent US4791653 - Pseudorandom word sequence synchronizer
