The mixer of the audio frequency analogue.Process for providing security of communications channel width of narrow band and system misturacao track audio frequency analogue

摘要

An analog frequency inversion scrambler employing an exchange of random number seeds between an originating scrambler (103) and an answering scrambler (107) to create two pseudo-random frequency hopping rolling codes has been disclosed. The rolling code used in one direction of a duplex channel is different than the rolling code in the opposite direction and each code is synchronized by periodic synchronization signals.