I am working to convert RGBs from an arcade board into Ypbpr component video. I am following the example schematic provided using two lt6550 to perform the matrix conversion. After completing the circuit I do not have green, nor any colour using green. Red and blue appear properly. Adjusting green values using a potentiometer changes luma/brightness. I assume green is indeed being conserved in the circuit since luma exists.
Researching I have determined that I need a sync gated with a transistor; as per instructions Looking at other circuits, I have not seen this being the case and sync is injected directly to Y. Will the lack of gated sync be the cause of missing green? If so, I will create and order a new board to prototype with. I am also using a LTC1983 to generate -3.3v, as per example given in the video suite pdf. I have noticed said chip generates -3v instead of -3.3v. Will this lack of voltage also be causing issues? I am attaching my schematic to my circuit.
spelled lack as lake*
[edited by: pnac at 4:57 PM (GMT -5) on 6 Dec 2021]