The R. L. Drake model EH244 encoder host is a platform for supporting modular MPEG2 and MPEG4 H.264 video encoders, including the SDE24, HDE24, and SDI24. The encoder host multiplexes the encoder outputs into up to 4 QAM output channels, configurable via a front panel interface or Ethernet web server. The EH244 includes provisions for emergency alert services, using either video replacement or SCTE18 control messages and is fully compatible with Drake's "Bandwidth Recovery Solution". The EH244 accepts up to 6 encoder modules, and allows each encoder's output program(s) to be assigned to any or all 4 output program streams. The EH244 can output on up to 4 frequency-adjacent QAM channels between 54MHz and 1002MHz using an internal QAM modulator, and supports optional factory installed ASI outputs that mirror the QAM program streams.