What is the difference between the Sync Reference I/O and the Digital I/O Sync on the back panel?
In terms of Inputs, there is no significant difference between the Sync Ref input and the Digital I/O sync input., except that the Sync Ref input has a selectable 75 ohm termination while the Digital I/O Sync input has a fixed 75 ohm termination. These two signals are internal to the RADAR and run to an internal selector before running to the Phase Lock Loop (PLL), so either can be used for external syncing. In terms of Outputs, the Sync Ref output and the Digital I/O Sync output are exactly the same, except that the Digital I/O Sync output is delayed 90 degrees in phase relative to the Sync Ref output to adhere to the Tascam TDIF standard. Either output can be used to sync up external equipment.
