Will the QM2000 board complain if it is given a negative time over the RS-232 line? Our current timecode network puts out ASCII timecode (THH:MM:......) once a second, but it starts out ~10 mins before the show and "counts down" to the start of the show (T-00:10:.....), which naturally occurs at 00:00:00.00, then commences counting up as one would expect. (This is so we can ensure all devices are properly syncing to the signal before the actual show starts.) Do I need to somehow suppress the negative times between the timecode reader and the QM2000 host?