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CHOOSING A SYNCHRONIZATION METHOD
Once you establish that all source components in the system have compatible IR commands, the next step is
to choose the appropriate sync method for each component.
There are two ways to detect when a component is ON or OFF: Video or Voltage Sync.
Video Sync
Video sync is the easiest and most reliable method of synchronization. Most video sources have a video out-
put active only when the device is ON. This type of video output provides an excellent method for component
synchronization.
The A4.6Ci has three 12V Video Sync connections for synchronizing as many as three source components. In
Figure 18, the video output of a DSS is connected to both a TV and the corresponding sync input for the DSS using
an RCA Y-adapter. Picture quality will be unaffected due to the high impedance of the sync input.
If the source component has two video outputs, the need for an RCA Y-adapter is eliminated. Simply connect
the first video output to its normal system destination, and the second video output will be dedicated for the
sync input.
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SOURCE-POWER SYNCHRONIZATION
LR
AUDIO VIDEO
DSS
PHONE
DIGITAL
TV
RCA Y-Adapter
Splitting Video Output
Video Input
Figure 18