| Tom,
I believe the Aja HD10A sync input is really intended to add flexibility as to what flavor of HD signal is applied to the input. For example, the HD10A can accept RGB which would not use the sync spigot because sync is already on the Green channel. Or, the HD10A can accept YPbPr which would not use the sync spigot because sync is already on the Y channel. However, if you had a RGBS signal (HD analog component as 4 wires) the sync spigot would be used.
Now, you can also apply a sync signal that did not originate with the source component HD signal, however in your application this would not necessarily mean that the output signal of the HD10A will arrive “in time” at the input of your switcher which is your goal.
You may get lucky … however simply inserting external sync into a device that accepts it is not the same as changing the timing of a signal which is what you need a frame synchronizer for. If the switcher does not have internal frame syncs then it wants to see all sources in-time before they are inserted into the switcher. There is no timing adjustment on a HD10A, which is why I and some others have advised that you will likely need an external frame sync for this signal (possibly in addition to the HD10A).
- Tom D'Angelo
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