I see some progress has been made while I was distracted. (Just cracked the high freq Electrohome problem) At my next free time slot I'll look some more at this problem. The multiple packets seen on the storage scope is consistent with what we were told about the IRDA transmission. It has several bytes. Most of them are probably machine ID. I'd expect only one or two bytes of actual code data to vary between the keys. We also have to look out for parity changing the apparent code.