The R.L. Drake model DQT1000 is a professional quality, digital headend transcoder product that tunes and demodulates MPEG2 or H.264 encoded VSB or QAM modulated signals from an off-air broadcast or CATV source or accepts an ASI input source. After error correction, it remodulates and upconverts the recovered MPEG2 transport stream onto a new QAM modulated digital output channel.