Converts digital satellite and terrestrial programmes to analogue with VSB modulation. Mix satellite, terrestrial and external signals in one headend. Modulates A/V from external sources to VSB analogue channel. Intelligent base unit includes power supply, data-bus and launch amplifier in one unit. PC/MAC software setup, interrogate, clone and data-log controls 2 base units. Watchdog built in to tuner modules to monitor digital reception. Input signal level and quality and diagnostics in receivers. Wall or 19” rack mounting