The SMPTE & V Sync (Vertical Sync) option card lets external time code, usually from a video source, control the DA7's Automation functions.
The SMPTE connection is made to the DA7 with a male XLR plug, while the V Sync signal connects to the Rear Panel with a BNC connector.
The SMPTE time code that the DA7 accepts is longitudinal, or LTC. Although often generated by a video deck, SMPTE time code can be generated by a number of devices, non-video in nature. The V Sync signal allows the DA7 to synchronize to an incoming composite video signal by reading the video sync pulse.