I'm using protools 10 hd in 2diffrent systems with two different audio interfaces. Is there way which I can have my two systems synced?can I join my interfaces in order to get the same time code?
Depends on the interface. Normally something like this would be handled by a sync cable and a clock generator that establishes a common clock across devices. This is only available on higher end interfaces though. Using an external clock and sync cables is the only way I know of for reliable shared timecode on multiple distinct devices. Your other option is just to sync after the fact as long as both have good internal clocks.