User`s manual

Alcorn McBride Digital Video Machine DVM-7400 User’s Manual Rev 1.5
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Triggering Synchronized DVM’s Simultaneously
If you remember the discussion at the beginning of the Synchronizing Multiple
DVM’s section, you’ll recall that there are two requirements for playing synchronous
video. We’ve already taken care of the first requirement in the Sharing Video Sync
Between DVM’s section, so now it’s time to take care of the second part; telling the
DVM’s to play simultaneously at the correct moment.
Accomplishing this requires a control system with enough RS-232 control ports to
interface to each DVM as well as the ability to accept an external video sync source.
It just so happens that Alcorn McBride specializes in designing and manufacturing
these types of controllers. All of our Show Controllers have different features that
allows them to support different applications. To determine which controller is best for
your application, be sure to check out our website at http://www.alcorn.com and/or
contact an Alcorn McBride representative.
When you are ready to install the controller, you should connect its C-Sync input to
the same sync source you are using for your DVM’s. If your DVM’s are daisy-
chained, the best place to make this connection would be the sync Output of the last
DVM in the chain. Once you have done that, you just need to connect the RS-232
cables to the serial ports on the controller.
The only remaining work is to write a script, or program, using a Windows application
called WinScript. This script is what is eventually transferred to the controller to tell it
what to do and when. Although writing scripts for our show controllers is beyond the
scope of this manual, there is an example script called SYNC2UNITS.AMW included
with WinScript that implements synchronized playback between 2 video players. This
is a great place pickup the basics without the need to create a script from scratch.