MJ Engineering manufacture a range of airborne protocol converter units, to provide data converison between digital avionic systems and legacy systems. These systems include interfaces to fuel flow systems, auto-pilots, flight management systems, radio altimeters, and military countermeasure dispenser systems. Our current products include: AP9114 - Arinc 429 to encoded alt / grey code, AP9120 - Arinc 429 to Mil-Std-1553B, AP9121 - Fuel flow interface, and AP9123 - Data Rate Converter.