The R.L. Drake
MQM1000 is a multiplexing QAM modulator with built-in agile upconverter. Accepts one or two MPEG2 digital inputs via two Asynchronous Serial Input (ASI) connectors. The MQM1000 can also operate as a non-multiplexing QAM modulator when a single ASI input is selected.
Spec Sheet
Owners Manual