meega wrote:
The little black switch is a level adjust for the UHF, low or high output strength. Low is usually fine.
As rkauer says, if you get nothing from the composite output it means the fault is not only in the UHF modulator.
black switch for ntsc is channel 3 or 4 it is different than that for pal switch is always ch36 i believe
the problem could be all the way back from the rgb source that is why rgb works but nothing else. you could use an a530 if you need composite or rf. that really sucks though because the a1200 and a530 outputs are like night and day on quality. some genlocks have composite output and look quite good.
