I too would love more detail. What is the exact nature and full detail of the “alternating pulse scheme”? Like is it actually pulsing the infrared light from a given TX at like 200kHz or something, and with the sync cable it is actually interleaving the pulses of light so that A eye shines and stops shining , and then B eye shines and stops shining, and then A eye shines and stops shining etc etc etc.? And how exactly would this help avoid interference? If your RX’s are close enough to one another to see a pulse of infrared from a single TX eye, how do the RX’s know whose pulse it is? Or do they have circuitry to know to expect the next pulse to be 1/200,000 of a s since the last one, and to ignore the one in between? Ah, that must be it.