Well had a worrying discovery this morning whilst testing the lasted beta version of the Miranda HD bridge software.
Noticed that when I click play on the DS the servo light comes straight on and the capture tool timecode starts counting from the timecode it last had in stop.
The thing is the HDV transport takes approx 2 seconds to startup and the timecode showing on the Miranda box doesn't start till a few seconds after play is pressed. The result is that the DS timecode is now some 2 seconds ahead of the actual offtape timecode. When stop is pressed on the DS the timecode on the DS snaps back the few seconds.
So it's possible the Miranda is falsely signalling that the servo is locked and tricking the DS to thinking the timecode should be progressing.
But it's frightening to image that the DS doesn't even both to check that the timecode coming down the RS422 isn't in sync with what it's counting.