[scitobor 617]

I'm working on a project that will require me to control several Victors with a PC parrellel port. I was thinking that this will be easy to do but I have a few questions. What is the purpose of all three connectors on a PWM cable, are only the ground and postive connectors used? Aslo, what is the range of duty cycles the Victor 883 and 884 can handle? And finally how much time does one cycle take?

Thanks in advance.