I need to acquire EMG and torque of the cuadriceps, actually i have a isocinetic equipment Con-Trex MJ and a Biopac, but I don't know if there's an accesory that provides a sync signal for the ADC.
It sounds like you are attempting to use two separate A/D systems. Just use one of the two systems to collect from both instruments. No synch signal is needed. Any A/D system can simultaneously collect from two channels.
Yeah Gordon, I'm trying to use two systems because I don't know if the signals of the Con-Trex MJ are available for an external amplifier. The manufacturer doesn't give me that information yet, and I prefer to explore a simple solution instead of inquiring about HW issues. ;)