I knew somebody would eventually show up with a proper oscilloscope for decoding the CLS pulses. My ancient, single channel, vacuum-tube Tektronix scope is inadequate for several reasons. I have been tempted to purchase one of the new four channel, recording, Tektronix units, but other NAS needs always prevailed. You confirmed what I suspected, but could not prove: it is a fairly simple binary coding system.
Have you had time to look at the FP sync pulse to see if it is a single, prolonged pulse, or a series of shorter pulses? The jury is still out on that question. I tried capturing it using the same technique I used for the CLS coding (two cameras, one rotating during the pulse, etc.) and suspect that it is continuous, but again, cannot prove or disprove it.
Thanks for a nice piece of work.
HBB in Phoenix, Arizona Nikonian Team Member
Go here for a list of membership upgrade benefits.
Photography is a journey with no conceivable destination.