Abstract: A method of transmitting multiple synchronized multiplex data frames which, by individual selection and control of specific bit valves performance of individual subchannels may be altered including the steps of inputting data from a plurality of sources simultaneously into a plurality of multiplexers to provide as an output of each multiplexer composite data signals, synchronizing the composite data signals simultaneously received from the plurality of multiplexers in a multiplex controller, encoding the synchronized composite data signal into a Gray code format, applying the coded format data stream to a digital-to-analog converter, modulating a carrier signal with the analog signal output of the converter and transmitting the frequency modulated carrier signals by a transmission system.