LTC Spec question

Thanks, Tony... I'm sure your catostatic generator will soon be pur^H^H^H^H^H no, damn it, even I can't force myself to actually type a pun *that* bad... sorry. Anyway, to further clarify - this particular 11/73 is destined for (automotive) mobile roles, and therefore has had it's PSU replaced w/one that was made quite recently, albeit for computers a few generations more evolved than the DEC Iron. Also it is desired to be able to run the LTC at 100 Htz as well. I am tasked with simulating the LTC signal, a simple matter, but I haven't the actual electrical spec for this circuit, thus my question. There will be no mains reference available. Thanks for the fact that the LTC line is pulled up to 5V at the terminator. That's a big chunk of the interface question out of the way... Cheers Nikola Felina