Sony DFS-700 - Manual (Page 121)

Chapter 5 Control From Editing
Control Units
Chapter 5 Control From Editing Control Units
5-7
Timing of the trigger (T1/T2) signals
The timing of the trigger signals output by the BVE-600 is as follows.
Timing of trigger signals in A/B roll editing
VCRs start IN point Effect start point OUT point VCRs stop
Player A
Player B
Recorder
T1
T2
PGM OUT
signal
Background bus image Foreground bus image
Preroll Effect
execution
(transition) Postroll
A-roll period B-roll period