Since I don't have gate generators up there, I grab the LED pulser used by DVCS which was seating in the HAPPEX crate. VME A16 address is 0x0ee0. To use : load object ld < /adaqfs/home/adaq/led/led.o LedOn() SetFrequency(0x17) that will give a few hertz of trigger, the higher number the lower frequency.