Code conversion system for data transmission network - with preamble provided by encoder at transmission end supplied to controller coupled to decoder at reception end

摘要

The code conversion system allows non return to zero coded data for transmission and allows received Manchester coded data to be converted into non return to zero data, using encoding and decoding circuits (141,151;142,152). The controller (13) at the reception end receives the preamble data provided by the encoder (141) via a data line leading from the decoder (152), to allow accurate identification of the data start and end. Pref. the data transmission mode has priority over the data reception mode. ADVANTAGE - Reliable detection of beginning and end of each data packet.