Thanks for your info. The pin 8 of D-sub is true the horiz.sync., but for connection with my Atari 1040 ste is not work, its scrumbled. The only way, is to feed the pin 7 in monitor (who is composite sync. input) with the atari horiz. sync. outpout to work like a charm. Unbelievable or not, but  this work perfect!   8-)