Polymorph wrote:
Alex, I'm just curious how you arrived at 51 Ohms. Was it through trial and error, or some other means of deduction?
"51" looks very precise - it's just a standard value I tried when 75 proved not to be low enough. I used a scope to see what the signal looks like. I would not use a much lower value for fear of overloading the GS's output driver, but 51 is safe.
When you wired up the 51 Ohm resistor, I assume it was in the same manner as I tried with a 75 Ohm resistor - i.e. the resistor between the composite sync and ground?
Yes.
Could you do me a favour and measure what the voltage is between composite sync and ground? It could be that I haven't lowered my composite sync signal quite enough? Maybe the sync level is 0.3V P-P. I think this is what is listed for one of the other 1084 inputs. Perhaps this is an omission from the specs of the RGB port?
I don't have this system connected at this time, sorry. However using the 200 ohm pot as was suggested here should do the trick for you.
Thanks for the help! Cheers, Mike
-Alex.