So I'm working on a project that involves X10 interfacing using the PSC05 and referencing technicalnote.pdf, which says that ordinary (non-dimming, non-extended) X10 commands should be sent twice with three cycles in between. When I do this with the PSC05, though, my CM11A detects the commands as being sent twice instead of once like it does with an ordinary plug-in X10 controller.

Is technicalnote.pdf wrong? I've tried this both with "cycle" being defined as a single zero crossing (i.e. three zero crossings in total) and with "cycle" being defined as a full period of the sine wave (i.e. six zero crossings in total) and both give the same result.

The PSC05's receiver detects the doubling and suppresses the first of the two copies of the command, so I can't use it to figure out what's going on, and I have no other means of looking at the raw power line.

Anyone have any idea what I should be doing? Thanks in advance.