In SX Microcontrollers, SX/B Compiler and SX-Key Tool, peterverkaik wrote:

James, it is indeed 75 ohms.

Phil, thanks for the driver schematic. It made me realise that
if a video input is indeed ac coupled, without the driver I
possibly would never get a stable 1.2V dc offset because the cap would

charge/discharge dependant on video frame content. The driver
does provide a stable 1.2V sync tip level at the transistor base.
(I have seen video inputs where the cap is the first component blocking all dc current,
although most video inputs have a 75ohm resistor to gnd before the cap that allows dc current
to flow).
 
Still want to know if someone has done such a one-pin setup
and has some working code in either asm or sxb.

regards peter

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