fiber dispersion is basically a smearing of the bit signal. THink of a square wave pulse with the squares getting more rounded, lengthened, and lower amplitude. Note that the leading edge does not smear forward (ie speed up) but the trailing end slows slightly. Over long distances the bits can even touch as far as the receiver is concerned. FOr our toslink cables and the distance involved there is no way this is happening. So essentially you are correct that if there was any jitter is came from the native signal, the transmitter, or the receiver. I would suspect that the native signal is more of a issue as getting into the Ghz is real easy for the transmitters and receivers now but that is a wild guess. the optoelectronics on our stuff may be supercheap so...........
anybody have a really good o-scope and want to test this?
anybody have a really good o-scope and want to test this?