JonSenior wrote:Good work that man!
I think the thing that many people liked about the idea of using wireless TTL is that we actually just need to record the output of the master and reproduce at the slave. As long as we are faithful in this, we don't need to understand the protocol.
In practise we'll have to, since the slaves we want to control will fire pre flashes which we need to distinguish from protocol related pulses.
It's also nice if we could use non-E-TTL capable flashes in wireless E-TTL configurations, at least in manual mode (think of using an ST-E2 with two full auto slave groups, and one 540EZ in manual mode producing the back light)
Or go strobist alltogether, and trigger 4 manual flashes with the small ST-E2 as transmitter and 4 cheap self made E-TTL aware slave controllers.
All that said... more understanding is always a good thing.
Another motivation for decoding the protocol would be that pulse position modulation works well for optical data transmission but would be the worst possible modulation type for RF data transmission. We need to translate those pulses before we push them into an RF transmitter, which means we have to understand at least what kind of pulse sequences can appear so we can encode them.