[Postman]

LTC or Serial TC, it should work either way as long as you're not trying to regen the code while using serial. I always used analog LTC with 6.4 and earlier because there used to be some problems with absolute sync and serial code. I think the problems were resolved in 6.4, but I wouldn't swear to it. I have to bow out of this one, I haven't used 6.4 software in many years and I just don't remember if Clock Source choices should be limited to Internal and AES while the USD is online with PT. It doesn't sound right to me now but I don't want to commit to that. I used to have three of those systems but, well, I don't remember basketball scores either. I only ran 6.4 on Mac anyway and you have PC. Sorry I cannot help more.