Multiplexer /Demultiplexer system for use in TM/TC links.

Provided in two physical units: The Mux-Dmx Board Unit is contained in a custom module, the Mux-Dmx Ground Unit is contained in a 2U 19 rack

Downlink (Board unit user inputs, Ground unit user outputs) with two synchronous RS422 channels and seven asynchronous RS232 channels

Uplink (Ground unit user inputs, Board unit user outputs): Seven asynchronous RS232 channels

Composite output rates up to 2Mbps with external clock, or internal fixed rates selectable via DIP switch

All board unit connections are made via a subD-9 pin, a subD-25 pin and a subD-50 connector

Automatic inversion: Detection of polarity ambiguity in receiver output data by looking for inverse of proprietary sync words and inversion of the output data accordingly (selectable via a DIP switch)

Sync word bit error tolerance for uplink and downlink, selectable via DIP switch.

Viterbi coding selectable via DIP switch

Composite output coding NRZ-L, NRZ-S or 28 scrambler, selectable via DIP switch.